Entries |
Document | Title | Date |
20080199389 | Method and device for producing carbon nanotubes - Methods and devices for producing carbon nanotubes are disclosed herein. These methods and devices are based on chemical vapor deposition (CVD) in an open environment under atmospheric pressure, which eliminates the need for a vacuum chamber or evacuation process to remove oxygen and/or impurities prior to carbon nanotube growth. | 08-21-2008 |
20080226535 | Method and Apparatus for Manufacturing Carbon Nano Tube - The present invention relates to a method and apparatus for manufacturing a carbon nano tube, and more particularly, to a method and apparatus for manufacturing a carbon nano tube by which a carbon nano tube having a uniform property and high purity can be manufactured by uniformly raising a temperature of reaction gas, which includes a gaseous transition metal catalyst precursor compound and gaseous carbon compound contained in a hermetically closed reaction space, to the Boudouard reaction temperature. The method for manufacturing a carbon nano tube according to the present invention comprises the steps of preparing a reaction vessel including a substantially hermetic and compressible reaction space; supplying the reaction space with carbon nano tube reaction gas containing a gaseous carbon compound and a gaseous transition metal catalyst precursor compound; and compressing the reaction gas in the reaction space until a temperature of the carbon nano tube reaction gas supplied to the reaction space reaches a temperature equal to or greater than a minimum starting temperature of the Boudouard reaction and a temperature at which the transition metal catalyst precursor compound is thermally decomposed, thereby producing gas with carbon nano tube products suspended therein. | 09-18-2008 |
20080226536 | METHOD AND APPARATUS FOR PRODUCING SINGLE-WALL CARBON NANOTUBES - The invention relates to a method for producing single-wall carbon nanotubes. The method of the invention comprises the steps of (a) providing a plasma torch having a plasma tube with a plasma-discharging end; (b) feeding an inert gas through the plasma tube to form a primary plasma; (c) contacting a carbon-containing substance and a metal catalyst with the primary plasma at the plasma-discharging end of the plasma tube, to form a secondary plasma containing atoms or molecules of carbon and atoms of the metal catalyst; and (d) condensing the atoms or molecules of carbon and the atoms of the metal catalyst to form single-wall carbon nanotubes. Alternatively, steps (b) and (c) can be carried out by feeding an inert gas and an inorganic metal catalyst through the plasma tube to form a primary plasma containing atoms of the inorganic metal catalyst and contacting a carbon-containing substance with the primary plasma at the plasma-discharging end of the plasma tube, to form a secondary plasma containing atoms or molecules of carbon and the atoms of metal catalyst. An apparatus for carrying out the method according to the invention is also disclosed. | 09-18-2008 |
20080226537 | Fine carbon fiber, method for producing the same and electrically conducting material comprising the fine carbon fiber - A fine carbon fiber having an outer diameter of about 1 to about 80 nm and an aspect ratio of 10 to 30,000, comprising a hollow center portion and a multi-layer sheath structure of a plurality of carbon layers, the layers forming annual rings, wherein the sheath-forming carbon layers form an incomplete sheath, i.e., the carbon layers are partially broken or disrupted in a longitudinal direction, and the outer diameter of the carbon fiber and/or the diameter of the hollow center portion are not uniform in a longitudinal direction. The carbon fiber is obtained by instantaneously reacting a carrier gas at a high temperature and an organic compound gas kept at a temperature below the decomposition temperature of the transition metal compound and has a conductivity equivalent to that of a conventional vapor phase method and is useful as a filler material in resins, rubbers, paints and the like. | 09-18-2008 |
20080247939 | Process for Producing Carbon Nanotubes - The invention provides a process for producing carbon nanotubes which includes supplying a continuous fluidized feed of a catalyst and at least one hydrocarbon to a reactor operating under conditions suitable to produce carbon nanotubes. The fluid is made to flow though the reactor with a swirling motion which ensures that the internal surfaces of the reactor are cleaned of deposits. | 10-09-2008 |
20080279755 | Carbon Nanotube, Nanorod, Nanosphere, and Related Nanostructure Formation Using Metal Boride Catalysts - The present invention relates to nanostructures such as carbon nanotubes, nanorods, and nanospheres and, more specifically, to a system and method for forming such nanostructures through the use of metal boride catalysts. | 11-13-2008 |
20080292532 | Method of Determining Lifetime of a Nanotube-Producing Catalyst - The present teachings are directed toward methods of determining the lifetime of a catalyst for producing carbon nanotubes. The methods include providing different isotopically-labeled reaction components, primarily hydrocarbon sources containing different carbon isotopes, to the catalyst and measuring the Raman spectra of the carbon nanotubes produced with the different hydrocarbon sources. | 11-27-2008 |
20080299031 | Method for making a carbon nanotube film - The present invention relates to a method for making a carbon nanotube film. The method includes the steps of: (a) forming an array of carbon nanotubes on a substrate; and (b) press the array of carbon nanotubes using a compressing apparatus, thereby forming a carbon nanotube film. | 12-04-2008 |
20080305028 | Integrated processes for generating carbon monoxide for carbon nanomaterial production - The integrated processes of the dry reforming or partial oxidation upstream of the carbon nanotube-producing reactor are described allowing the carbon monoxide to be produced on an as-needed basis, negating the need to transport carbon monoxide to the production site or store large quantities of carbon monoxide on-site. The apparatuses allowing to carry out such integrated processes are also provided. Carbon dioxide emissions may be eliminated from the carbon nanotube production process. This may be achieved by recycling the carbon dioxide byproduct and mixing it with the feed to the partial oxidation process. | 12-11-2008 |
20080305029 | Integrated processes for generating carbon monoxide for carbon nanomaterial production - The integrated processes of the dry reforming or partial oxidation upstream of the carbon nanotube-producing reactor are described allowing the carbon monoxide to be produced on an as-needed basis, negating the need to transport carbon monoxide to the production site or store large quantities of carbon monoxide on-site. The apparatuses allowing to carry out such integrated processes are also provided. Carbon dioxide emissions may be eliminated from the carbon nanotube production process. This may be achieved by recycling the carbon dioxide byproduct and mixing it with the feed to the partial oxidation process. | 12-11-2008 |
20080305030 | Integrated processes for generating carbon monoxide for carbon nanomaterial production - The integrated processes of the dry reforming or partial oxidation upstream of the carbon nanotube-producing reactor are described allowing the carbon monoxide to be produced on an as-needed basis, negating the need to transport carbon monoxide to the production site or store large quantities of carbon monoxide on-site. The apparatuses allowing to carry out such integrated processes are also provided. Carbon dioxide emissions may be eliminated from the carbon nanotube production process. This may be achieved by recycling the carbon dioxide byproduct and mixing it with the feed to the partial oxidation process. | 12-11-2008 |
20080311025 | METHOD FOR FORMING A PATTERNED ARRAY OF FULLERENE NANOTUBES - This invention relates generally to forming a patterned array of fullerene nanotubes. In one embodiment, a nanoscale array of microwells is provided on a substrate; a metal catalyst is deposited in each microwells; and a stream of hydrocarbon or CO feedstock gas is directed at the substrate under conditions that effect growth of fullerene nanotubes from each microwell. | 12-18-2008 |
20090068084 | Apparatus and method for producing carbon nanotubes - Provided is an apparatus for producing carbon nanotubes, that is provided with a reaction chamber and a dispersion plate. The dispersion plate is provided with a plate and a gas guiding portion provided on an edge of the plate, and a catalyst supply hole is defined in the central portion of the plate, through which metal catalysts are supplied. The gas guiding portion guides source gas to the central portion of the plate and suspends the metal catalysts discharged from the catalyst supply hole in a specific direction. Thus, the apparatus for producing carbon nanotubes can prevent loss of metal catalysts and improve space utilization. | 03-12-2009 |
20090136413 | Method for enhanced synthesis of carbon nanostructures - A method of significantly improving carbon nanotube or carbon nanofiber yield from catalytic chemical vapor deposition of a carbon-containing gas comprising at least one hydrocarbon with the assistance of a proper amount of carbon dioxide (CO | 05-28-2009 |
20090180946 | FIBER CONTAINING CARBON, SUBSTRATE AND ELECTRON EMISSION DEVICE USING FIBER CONTAINING CARBON, ELECTRON SOURCE USING THE ELECTRON EMISSION DEVICE, DISPLAY PANEL USING THE ELECTRON SOURCE, AND INFORMATION DISPLAYING/PLAYING APPARATUS USING THE DISPLAY PANEL, AND A METHOD OF MANUFACTURING THEREOF - The invention provides a fiber containing carbon which is less deteriorated in terms of electron emission characteristic, is excellent in terms of reproducibility, and can in addition be formed at a low cost, a substrate and electron emission device using the fiber containing carbon, an electron source using the electron emission device, a display panel using the electron source, and an information displaying/playing apparatus using the display panel, and a method of manufacturing these. The manufacturing method comprises a first step of preparing a substrate (substrate | 07-16-2009 |
20090246116 | Process for manufacturing single-wall carbon nanotubes - A process for manufacturing single-wall and multiwall carbon nanotubes, comprising the stage of ablation by pulsed electronic beams of a graphite target that contains metallic catalysts. | 10-01-2009 |
20090257945 | METHODS OF MAKING HORIZONTALLY ORIENTED LONG CARBON NANOTUBES AND APPLICATIONS OF SAME - An apparatus and method for synthesizing nanostructures in a reactor having a reaction zone and a conductive susceptor positioned in the reaction zone. In one embodiment, the method has the steps of placing a semiconductor plate having a film of a catalyst in the reaction zone such that the semiconductor plate is supported by the conductive susceptor; transporting a gas mixture having a feedstock gas having hydrocarbon and a carrier gas into the reaction zone of the chamber; inductively heating the reaction zone; and regulating the heating so that the temperature of the conductive susceptor increases from a first temperature to a second temperature when the gas mixture is introduced into the cavity of the chamber to allow nanostructures to be grown from the interaction of the gas mixture with the film of a catalyst of the semiconductor plate. | 10-15-2009 |
20090263310 | Method for making carbon nanotubes - A method for making carbon nanotubes that includes the following steps. A metal substrate is provided. The surface of the metal substrate is polished. The polished metal substrate is put into a reaction device. A protecting gas is introduced to the reaction device while the environment inside of the reaction device is heated to about 400 to 800 degrees. A mixture of carbon source gas and protecting gas is introduced to the reaction device, whereby the carbon nanotubes are grown on the metal substrate on the polished metal substrate. | 10-22-2009 |
20090311167 | METHOD AND APPARATUS FOR SYNTHESIZING FILAMENTARY STRUCTURES - Method and apparatus for producing filamentary structures. The structures include single-walled nanotubes. The method includes combusting hydrocarbon fuel and oxygen to establish a non-sooting flame and providing an unsupported catalyst to synthesize the filamentary structure in a post-flame region of the flame. Residence time is selected to favor filamentary structure growth. | 12-17-2009 |
20090324484 | Effect Of Hydrocarbon And Transport Gas Feedstock On Efficiency And Quality Of Grown Single-Walled Nanotubes - Methods and processes for synthesizing high quality carbon single-walled nanotubes (SWNTs) are provided. The method provides the means for optimization of amount of carbon precursor and transport gas per unit weight of catalyst. Efficiencies of about 20% can be achieved when contacting the catalyst deposited on a support with a carbon precursor gas with a flow rates of about 4.2×10 | 12-31-2009 |
20100015033 | Process for preparing carbon nanostructures with tailored properties and products utilizing same - The present invention discloses a relatively simple CVD method for forming specifically tailored carbon-based nanostructures. In general, the method is a chemical vapor deposition method in which at least a portion of the precursor materials are provided as a liquid at atmospheric conditions. The precursor materials include at least one carbon source and at least one catalyst source. Optionally, the precursor materials can also include one or more dopant sources. The carbon source and the optional dopant source can be injected as liquids into the system, and the liquid catalyst source can be either injected into the system or located on a substrate in the reactor prior to the process. Very high yield of nanostructures exhibiting particular characteristics can be attained by the process. Control of electrical characteristics as well as structural characteristics of the products are possible via control of process parameters including the particular precursors used as well as the relative amounts of the precursors used. | 01-21-2010 |
20100074834 | APPARATUS AND METHOD FOR SURFACE-TREATING CARBON FIBER BY RESISTIVE HEATING - In an apparatus for surface-treating a carbon fiber, wherein the carbon fiber is heated by resistive heating, a carbon-containing gas is disposed on the carbon fiber, and carbon nanotubes are grown on a surface of the carbon fiber. | 03-25-2010 |
20100080749 | CARBON NANOTUBES, A METHOD OF PREPARING THE SAME AND AN ELEMENT USING THE SAME - Carbon nanotubes, a method for preparing the same and an element using the same are provided. The method for preparing carbon nanotubes includes synthesizing carbon nanotubes from carbon source using an arc-discharge method in the presence of catalysts and promoter, wherein the promoter contains an element capable of reducing the surface energy of carbon nanotubes. Carbon nanotubes with high purity and narrow diameter distribution can thus be prepared. | 04-01-2010 |
20100086472 | Single-walled carbon nanotube catalysts and method for preparing same - An activated catalyst capable of selectively growing single-walled carbon nanotubes when reacted with carbonaceous gas is provided. The activated catalyst is formed by reducing a catalyst that comprises a complex oxide. The complex oxide may be of formula A | 04-08-2010 |
20100124530 | MEMBRANE SEPARATION OF FEED AND GROWTH ENVIRONMENTS IN CARBON NANOSTRUCTURE GROWTH - The invention provides CVD-based methods for growing single-walled or multi-walled carbon nanotubes. In the methods of the invention, the nanotube growth environment is separated from the carbon-containing gas feed environment using a membrane which is substantially impermeable to gas flow but permits diffusion of carbon through the membrane. A catalyst for carbon nanotube growth is located on the growth side of the membrane while a catalyst for decomposition of carbon-containing gas is located on the feed side of the membrane. A path for diffusion of carbon through the membrane is provided between the growth and decomposition catalysts. Control of the size and shape of the carbon nanotube growth catalyst enables control over the nanotube structure formed. | 05-20-2010 |
20100215568 | PROCESS FOR PRODUCING HYDROGEN GAS AND CARBON NANOTUBES FROM CATALYTIC DECOMPOSITION OF ETHANOL - The present invention relates to a process for the production of hydrogen gas and carbon nanotubes from catalytic decomposition of ethanol. More particularly, the invention relates to a process for preparing hydrogen gas and carbon nanotubes from catalytic decomposition of bioethanol over Ni/La | 08-26-2010 |
20100226848 | Catalyst for Carbon Nanostructure Growth, Process for Producing Carbon Nanostructure, Raw-Material Gas and Carrier Gas for Producing the Same, and Apparatus for Producing the Same - It is the purpose of this invention to present a process for producing carbon nanostructure in which the mechanism of continuous carbon nanostructure growth can be optimized and a high-quality carbon nanostructure can be produced, a catalyst for carbon nanostructure growth which is for use in the production, a raw-material gas and a carrier gas for producing the same, and an apparatus for producing the same. The process for carbon nanostructure production, in which the length of the nanostructure can be continuously controlled comprises feeding a carrier gas and a raw-material gas to a reaction chamber ( | 09-09-2010 |
20100239491 | Method of producing carbon nanotubes - The present teachings are directed to methods of preparing cylindrical carbon structures, specifically single-walled carbon nanotubes, with a desired chirality. The methods include the steps of providing a catalyst component on a substrate and a carbon component, contacting the catalyst component and the carbon component to produce a cylindrical carbon structure. Then, no longer providing the carbon component and determining the chirality of the cylindrical carbon structure. The catalyst component is then cleaned and the process is repeated until the cylindrical carbon structure fulfills a desired characteristic, such as, length. The chirality of the single-walled carbon nanotube grown, after cleaning of the catalyst component, has the same chirality as the initially produced nanotube. | 09-23-2010 |
20100247421 | METHOD FOR PRODUCTION OF CARBON NANOTUBE - [Problems to be Solved] There is provided a method for production of a carbon nanotube, which allows for production of the carbon nanotube in a large scale and at a low cost. | 09-30-2010 |
20100278717 | Method and apparatus for manufacturing carbon nanotube - A carbon nanotube manufacturing method wherein a catalyst is heated in a reaction chamber while the reaction chamber is filled with argon gas containing hydrogen. When a predetermined temperature is reached in the reaction chamber, the reaction chamber is evacuated. Then a raw material gas as a carbon source is charged and sealed in the reaction chamber whereupon the synthesis of carbon nanotube begins. Subsequently, when a condition in which the synthesis of carbon nanotubes has proceeded to a predetermined level is detected, gases in the reaction chamber are exhausted. Then, the raw material gas is changed and sealed in the reaction tube again. Thereafter, the charging (synthesizing) operation and the exhausting operation are repeated until the carbon nanotube with a desired film thickness are synthesized. A carbon nanotube manufacturing apparatus is also disclosed | 11-04-2010 |
20100284897 | Apparatus and method for synthesizing carbon nanotube - An apparatus for synthesizing a carbon nanotube includes a reaction chamber, a cassette, a transferring member, a heater, a gas supply member and a gas exhausting part. The carbon nanotube is synthesized in the reaction chamber. The reaction chamber has a substantially vertical major axis. The cassette holds a plurality of substrates. The transferring member transfers the cassette along a direction substantially in parallel relative to the major axis to load/unload the cassette into/from the reaction chamber. The heater heats the reaction chamber. The gas supply member provides the reaction chamber with a gas for synthesizing the carbon nanotube. The gas exhausting member exhausts a remaining gas from the reaction chamber. Collecting the carbon nanotube may be facilitated and managing the reaction chamber may be effective to enhance a productivity of the carbon nanotube. | 11-11-2010 |
20110027164 | METHOD AND APPARATUS FOR SYNTHESIZING CARBON NANOTUBES USING ULTRASONIC EVAPORATION - Disclosed herein is an apparatus and method for synthesizing carbon nanotubes, including a fuel supply unit for supplying a large amount of liquid metal catalyst mixture using a syringe pump for quantitatively supplying a liquid metal catalyst mixture, mixed with hydrocarbon-based liquid carbon sources such as xylene, toluene, benzene and the like, and metal catalytic particles, such as iron, nickel, cobalt, molybdenum and the like, and a general liquid pump for supplying a liquid metal catalyst mixture depending on the amount thereof; an evaporation unit for evaporating and atomizing the liquid metal catalyst mixture supplied from the fuel supply unit into precursors having a uniform size on the nanometer scale; a carrier gas supply unit for transferring particles atomized in the evaporation unit to a reactor and transferring carrier gas, having an influence on the synthesis of carbon nanotubes, to the reactor; a horizontally oriented reaction unit for synthesizing carbon nanotubes in large quantities using the carrier gas supplied from the carrier gas supply unit and the precursors formed in the evaporation unit; a filtering unit comprising a filter for filtering residual particles among the atomized particles synthesized into carbon nanotubes in the horizontally oriented reaction unit and some of the carbon nanotubes synthesized in the vapor phase; and a vacuum generation unit comprising a vacuum pump configured to be connected with the filtering unit, decrease pressure in the reactor, and remove oxygen remaining in the reactor, or a continuous collection unit in the case where the apparatus includes a vertical type reaction unit. | 02-03-2011 |
20110085961 | CARBON NANO-TUBE MANFUACTURING METHOD AND CARBON NANO-TUBE MANUFACTURING APPARATUS - The method for producing carbon nanotubes of the invention employs a carbon source that contains carbon and is decomposed when heated and a catalyst that serves as a catalyst for production of carbon nanotubes from the carbon source, to synthesize the carbon nanotubes on a heated support placed in a reactor, the method comprising a catalyst loading step in which the catalyst starting material, as the starting material for the catalyst, is distributed over the support to load the catalyst onto the support, a synthesis step in which the carbon source is distributed over the support to synthesize the carbon nanotubes on the support, and a separating step in which a separating gas stream is distributed over the support to separate the carbon nanotubes from the support, wherein the catalyst loading step, the synthesis step and the separating step are carried out while keeping the support in a heated state and switching supply of the catalyst starting material, the carbon source and the separating gas stream. | 04-14-2011 |
20110150746 | Novel carbon nanotubes synthesis continuous process using iron floating catalysts and MgO particles for CVD of methane in a fluidized bed reactor - A novel continuous process is used for production of carbon nanotubes (CNTs) by catalytic chemical vapor deposition (CCVD) of methane on iron floating catalyst in-situ deposited on MgO in a fluidized bed reactor. In the hot zone of the reactor, sublimed ferrocene vapors were contacted with MgO powder fluidized by methane feed to produce Fe/MgO catalyst in-situ. An annular tube was used to enhance the ferrocene and MgO contacting efficiency. Multi-wall as well as single-wall CNTs were grown on the Fe/MgO catalyst while falling down the reactor. The CNTs were continuously collected at the bottom of the reactor, only when MgO powder was used. The annular tube enhanced the contacting efficiency and improved both the quality and quantity of CNTs. The SEM and TEM micrographs of the products reveal that the CNTs are mostly entangled bundles with diameters of about 20 nm. Raman spectra show that the CNTs have low amount of amorphous carbon with I | 06-23-2011 |
20110165058 | Growth of Single-walled Carbon Nanotubes - A method for synthesizing carbon nanotubes having a narrow distribution of diameter and/or chirality is presented. The method comprises providing catalyst particles to a reactor for synthesizing the carbon nanotubes, wherein the catalyst particles are characterized by a narrow distribution of catalyst-particle diameters and a narrow distribution of catalyst-particle compositions. Preferably, the catalyst particles are characterized by a mean catalyst-particle diameter of 2.6 nm or less and a composition of Ni | 07-07-2011 |
20110195013 | Supported Catalyst for Synthesizing Carbon Nanotubes, Method for Preparing the Same and Carbon Nanotubes Made Using the Same - The present invention provides a supported catalyst for synthesizing carbon nanotubes. The supported catalyst includes a metal catalyst supported on a supporting body, and the supported catalyst has a surface area of about 15 to about 100 m | 08-11-2011 |
20110212016 | Supported Catalysts for Synthesizing Carbon Nanotubes, Method for Preparing the Same, and Carbon Nanotubes Made Using the Same - The present invention provides a supported catalyst for synthesizing carbon nanotubes. The supported catalyst includes a metal catalyst supported on a supporting body and a water-soluble polymer, and has an average diameter of about 30 to about 100 μm. | 09-01-2011 |
20110229402 | CARBON NANOFIBERS AND PROCEDURE FOR OBTAINING SAID NANOFIBERS - The object of the present invention is carbon nanofibers mainly characterized by their high specific volume of mesopores, their high gas adsorption capacity and presenting a graphitic hollow structure. A second object of this invention is a procedure for obtaining such carbon nanofibers, which makes use of a metallic nickel catalyst and specific process furnace parameters that combined with the chemical composition of the furnace atmosphere and the fluidodynamic conditions of the gas stream inside the furnace, result in a faster growth of the carbon nanofibers and also in a higher quality of the carbon nanofibers obtained. | 09-22-2011 |
20110293504 | PROCESS FOR PRODUCING CARBON NANOTUBES (CNTs) - The present invention provides a process for producing substantially uniform-sized carbon nanotubes (CNTs), the process includes the step of contacting methane with catalytic particles at a temperature of between 650 to 850° C. | 12-01-2011 |
20110318256 | Method of Continuously Synthesizing Oriented Carbon Nanotubes and Apparatus for Continuously Synthesizing Same - A method and apparatus for continuously synthesizing oriented carbon nanotubes, with which oriented carbon nanotubes can be stably synthesized in large quantities, is presented. | 12-29-2011 |
20120076718 | METHOD FOR MAKING CARBON NANOTUBE ARRAY - A method for forming a carbon nanotube array is related. A substrate with a catalyst layer on a surface of the substrate is provided and placed into a reaction device. At least two kinds of carbon source gases including different kinds of single carbon isotope are introduced into the reaction device at the same time. The reaction device is heated to different reaction temperatures to react the carbon source gases under different temperatures to grow a carbon nanotube array on a surface of the catalyst layer. | 03-29-2012 |
20120134910 | METHOD AND APPARATUS FOR SYNTHESIZING FILAMENTARY STRUCTURES - Method and apparatus for producing filamentary structures. The structures include single-walled nanotubes. The method includes combusting hydrocarbon fuel and oxygen to establish a non-sooting flame and providing an unsupported catalyst to synthesize the filamentary structure in a post-flame region of the flame. Residence time is selected to favor filamentary structure growth. | 05-31-2012 |
20120141355 | Methods and catalysts for the manufacture of carbon fibrils - An improved catalyst for producing carbon fibrils is made by incorporating an effective yield-enhancing amount of a carboxylate into a fibril-forming catalyst. Alternatively, such a catalyst is made by coprecipitating a compound of a metal having fibril-forming catalytic properties and an aluminum and/or magnesium compound, optionally in the presence of carbon particles or carbon fibril aggregates. The catalyst may also be made by incorporating a compound of a fibril-forming metal onto magnesia particles in carbon particles or carbon fibril aggregates. The catalysts, methods of using them to form carbon fibrils and those carbon fibrils are also disclosed. | 06-07-2012 |
20120148475 | AUGMENTED REACTOR FOR CHEMICAL VAPOR DEPOSITION OF ULTRA-LONG CARBON NANOTUBES - Apparatus to produce carbon nanotubes (CNTs) of arbitrary length using a chemical vapor deposition (CVD) process reactor furnace is described, where the CNTs are grown axially along a portion of the length of the furnace. The apparatus includes a spindle and a mechanism for rotating the spindle. The spindle located within a constant temperature region of the furnace and operable to collect the CNT around the rotating spindle as the CNT is grown within the furnace. | 06-14-2012 |
20120148476 | METHOD FOR PRODUCING CARBON NANOTUBE ASSEMBLY HAVING HIGH SPECIFIC SURFACE AREA - Disclosed is a method for continuously and stably producing a CNT assembly having a high specific surface area in a catalyst activating substance-containing, high-carbon-concentration environment. | 06-14-2012 |
20120156124 | Single Wall Carbon Nanotubes By Atmospheric Chemical Vapor Deposition - The present disclosure provides for systems and methods for producing carbon nanotubes. More particularly, the present disclosure provides for improved systems and methods for producing single wall carbon nanotubes (SWNTs) by chemical vapor deposition (CVD) using a carbon source in the presence of a catalyst. In exemplary embodiments, the present disclosure provides for improved systems and methods for producing single wall carbon nanotubes (SWNTs) by chemical vapor deposition (CVD) using carbon monoxide (CO) disproportionation in the presence of a catalyst composition on a catalyst support material. In one embodiment, the present disclosure provides for systems and methods for producing single wall carbon nanotubes (SWNTs) by chemical vapor deposition (CVD) using carbon monoxide (CO) disproportionation with CO pressure from about 0.20 atm to about 1.0 atm in the presence of a cobalt/molybdenum catalyst composition on a magnesium oxide catalyst support. | 06-21-2012 |
20120171106 | CARBON NANOTUBE GROWTH VIA CHEMICAL VAPOR DEPOSITION USING A CATALYTIC TRANSMEMBRANE TO SEPARATE FEEDSTOCK AND GROWTH CHAMBERS - A system and method for growing nanotubes out of carbon and other materials using CVD uses a catalytic transmembrane to separate a feedstock chamber from a growth chamber and provide catalytic material with separate catalytic surfaces to absorb carbon atoms from the feedstock chamber and to grow carbon nanotubes in the growth chamber. The catalytic transmembrane provides for greater flexibility to independently control both the gas environment and pressure in the chambers to optimize absorption and carbon growth and to provide instrumentation in the growth chamber for in-situ control of defects or observation of the carbon nanotube growth. | 07-05-2012 |
20120171107 | METHOD OF FORMING SINGLE-WALLED CARBON NANOTUBES - The present invention relates to a method of forming single-walled carbon nanotubes. The method comprises contacting a gaseous carbon source with mesoporous TUD-1 silicate at suitable conditions. The mesoporous TUD-1 silicate comprises a metal of groups 3-13 of the Periodic Table of the Elements. | 07-05-2012 |
20120189530 | System And Process For Producing Hydrogen And A Carbon Nanotube Product - A system for producing hydrogen and a carbon nanoproduct includes a hydrocarbon feed gas supply configured to supply a hydrocarbon feed gas at a selected flow rate, a reactor having a hollow reactor cylinder with an enclosed inlet adapted to continuously receive the hydrocarbon feed gas, a reaction chamber in fluid communication with the inlet, and an enclosed outlet in fluid communication with the reaction chamber adapted to discharge a product gas comprised of hydrogen and unreacted hydrocarbon feed gas, along with the carbon nanoproduct. The system also includes a catalyst transport system adapted to move a selected amount of a metal catalyst through the reaction chamber at a rate dependent on the flow rate of the hydrocarbon feed gas to form the product gas. The system also includes a carbon separator adapted to separate the carbon product from the product gas and from the metal catalyst. | 07-26-2012 |
20120213691 | GRAPHITE NANO-CARBON FIBER AND METHOD OF PRODUCING THE SAME - According to one embodiment, there is provided a graphite nano-carbon fiber provided by using an apparatus having a reactor capable of keeping a reducing atmosphere inside thereof, a metal substrate arranged as a catalyst in the reactor, a heater heating the metal substrate, a pyrolysis gas source supplying pyrolysis gas obtained by thermally decomposing a wood material in a reducing atmosphere to the reactor, a scraper scraping carbon fibers produced on the metal substrate, a recovery container recovering the scraped carbon fibers, and an exhaust pump discharging exhaust gas from the reactor. The carbon fibers are linear carbon fibers with a diameter of 25 to 250 nm formed with layers of graphenes stacked in a longitudinal direction. | 08-23-2012 |
20120219490 | METHOD FOR SIMULTANEOUSLY PRODUCING CARBON NANOTUBES AND HYDROGEN, AND DEVICE FOR SIMULTANEOUSLY PRODUCING CARBON NANOTUBES AND HYDROGEN - A method for simultaneously producing carbon nanotubes and hydrogen according to the present invention is a method for simultaneously producing carbon nanotubes and hydrogen, in which using a carbon source containing carbon atoms and hydrogen atoms and being decomposed in a heated state, and a catalyst for producing carbon nanotubes and H | 08-30-2012 |
20120230908 | SUBSTRATE FOR GROWING CARBON NANOTUBES, MANUFACTURING METHOD THEREOF, AND MANUFACTURING METHOD OF ORIENTED CARBON NANOTUBES - A substrate for growing carbon nanotubes capable of elongating single-walled carbon nanotubes of an average diameter of less than 2 nm is provided. The substrate for growing carbon nanotubes | 09-13-2012 |
20120237436 | Catalyst For The Growth Of Carbon Single-Walled Nanotubes - Methods and processes for synthesizing single-wall carbon nanotubes are provided. A carbon precursor gas is contacted with metal catalysts deposited on a support material. The metal catalysts are preferably nanoparticles having diameters less than about 3 nm. The reaction temperature is selected such that it is near the eutectic point of the mixture of metal catalyst particles and carbon. Further, the rate at which hydrocarbons are fed into the reactor is equivalent to the rate at which the hydrocarbons react for given synthesis temperature. The methods produce carbon single-walled nanotubes having longer lengths. | 09-20-2012 |
20120251432 | METHODS FOR THE PRODUCTION OF ALIGNED CARBON NANOTUBES AND NANOSTRUCTURED MATERIAL CONTAINING THE SAME - Disclosed herein is a scaled method for producing substantially aligned carbon nanotubes by depositing onto a continuously moving substrate, (1) a catalyst to initiate and maintain the growth of carbon nanotubes, and (2) a carbon-bearing precursor. Products made from the disclosed method, such as monolayers of substantially aligned carbon nanotubes, and methods of using them are also disclosed. | 10-04-2012 |
20120251433 | PROCESS FOR FABRICATING CARBON NANOTUBES AND APPARATUS FOR IMPLEMENTING THE PROCESS - An industrial process and an apparatus for fabricating carbon nanotubes (CNTs) is provided, comprising synthesis of the carbon nanotubes by decomposing a carbon source brought into contact, in a fluidized-bed reactor, whereby the carbon nanotubes synthesized in the reactor and fixed onto the grains of catalytic substrate in the form of an entangled three-dimensional network, forming agglomerates constituting the CNT powder, are recovered sequentially by discharging them while hot, that is to say at the reaction temperature for synthesizing the CNTs, at the foot of the reactor, the sequence in which the discharges are carried out corresponding to the frequency of filling of the reactor. | 10-04-2012 |
20120321544 | METHOD FOR PRODUCING ALIGNED CARBON NANOTUBE AGGREGATE - A production method in accordance with the present invention includes the steps of: providing a catalyst support layer by applying, to a substrate, a catalyst support layer coating agent obtained by dissolving in an organic solvent (i) an organometallic compound containing aluminum and/or a metal salt containing aluminum and (ii) a stabilizer for inhibiting a condensation polymerization reaction of the organometallic compound and/or the metal salt; providing a catalyst formation layer by applying, to the catalyst support layer, a catalyst formation layer coating agent obtained by dissolving in an organic solvent (a) an organometallic compound containing iron and/or a metal salt containing iron and (b) a stabilizer for inhibiting a condensation polymerization reaction of the organometallic compound and/or the metal salt; and growing an aligned carbon nanotube aggregate on the substrate by chemical vapor deposition (CVD). | 12-20-2012 |
20130011328 | PREPARATION OF CNTS - The present invention relates to a process comprising the steps a) synthesis of carbon nanotubes, b) optional inerting and c) cooling of the product. The process permits problem-free handling and packing of the carbon nanotube material that is produced. | 01-10-2013 |
20130022531 | FILTER AND PROCESS OF USE TO PRODUCE CARBON NANOTUBES FROM AUTOMOTIVE EXHAUSTS - We disclose a novel filter and process that converts the wastes in automotive exhausts into carbon nanotubes. The filter surface is composed of iron of similar catalyst. The filter is placed along the pathway of exhaust streamlines preferably at an angle of more than 5°. and less than 15°. The filter is heated to temperatures in the range of 200-1000° C. The filter described in this invention can work in its own or supplement existing filtration systems. The end product of this filtration system is a material that is commercially valuable. The synthesized carbon nanotubes are purified using ionic liquid solution that is capable of removing undesirable carbonated material and leaving 95% purified carbon nanotubes. The purified carbon nanotubes have a diameter of 20-50 nm and a length of 1-10 micro meters. | 01-24-2013 |
20130045157 | IN-LINE MANUFACTURE OF CARBON NANOTUBES - Mass production of carbon nanotubes (CNT) are facilitated by methods and apparatus disclosed herein. Advantageously, the methods and apparatus make use of a single production unit, and therefore provide for uninterrupted progress in a fabrication process. Embodiments of control systems for a variety of CNT production apparatus are included. | 02-21-2013 |
20130058859 | SYSTEMS AND METHODS RELATED TO THE FORMATION OF CARBON-BASED NANOSTRUCTURES - Systems and methods for the formation of carbon-based nanostructures are generally described. In some embodiments, the nanostructures may be formed on a nanopositor. The nanopositor can comprise, in some embodiments, at least one of metal atoms in a non-zero oxidation state and metalloid atoms in a non-zero oxidation state. For example, the nanopositor may comprise a metal oxide, a metalloid oxide, a metal chalcogenide, a metalloid chalcogenide, and the like. The carbon-based nanostructures may be grown by exposing the nanopositor, in the presence or absence of a growth substrate, to a set of conditions selected to cause formation of carbon-based nanostructures on the nanopositor. In some embodiments, metal or metalloid atoms in a non-zero oxidation state are not reduced to a zero oxidation state during the formation of the carbon-based nanostructures. In some cases, metal or metalloid atoms in a non-zero oxidation state do not form a carbide during the formation of the carbon-based nanostructures. | 03-07-2013 |
20130078178 | METHOD AND APPARATUS FOR FABRICATION OF CARBON NANOTUBES USING AN ELECTROSTATICALLY CHARGED SUBSTRATE AND LINER - A system for use in fabrication of carbon nanotubes (CNTs) includes a wafer having a circuitry and a plurality of CNT seed sites. The system also includes a base assembly configured to support the wafer. The system further includes a first tube disposed over the wafer and configured to surround the CNTs that form on the seed sites. The circuitry in the wafer is configured to conduct at least one static charge. The wafer includes a top surface having a plurality of CNT seed sites, each seed site coupled to the circuitry and configured to receive one of the at least one static charge. | 03-28-2013 |
20130084235 | CARBON NANOTUBE DEVICE, PROCESS FOR PRODUCTION OF CARBON NANOTUBE, AND DEVICE FOR PRODUCTION OF CARBON NANOTUBE - A new carbon nanotube device is provided. The carbon nanotube device has first carbon nanotubes and second carbon nanotubes that are different from each other in property. The carbon nanotube device includes: an object having a first carbon nanotube forming surface and a second carbon nanotube forming surface; first carbon nanotubes formed on the first carbon nanotube forming surface; and second carbon nanotubes formed on the second carbon nanotube forming surface, the second carbon nanotubes being different from the first carbon nanotubes in property. | 04-04-2013 |
20130209347 | GAS TO GAS HEAT EXCHANGER - A gas to gas heat exchanger, such as use in a HiPco system, and an improved system and process by which gas from the gas to gas heat exchanger and the gaseous catalyst carrier stream can be introduced into the HiPco core reactor. | 08-15-2013 |
20130259795 | LOW TEMPERATURE SINGLE-WALL CARBON NANOTUBE SYNTHESIS - The present disclosure is directed to a method for producing SWCNT from endothermic carbon-containing feedstock, such as, methane gas, using an activated alumina supported Fe:Mo catalyst. The SWCNT growth temperature is less than about 560° C., and the catalyst is activated by exposure to a reducing atmosphere at a temperature greater than about 900° C. | 10-03-2013 |
20130287674 | PROCESS FOR PRODUCTION OF CARBON NANOTUBE - The present invention relates to a method for producing carbon nanotubes, comprising a synthesis step of synthesizing carbon nanotubes on a support on which a catalyst is supported by flowing a source gas consisting of acetylene, carbon dioxide, and an inert gas over the support, wherein in the source gas, a partial pressure of the acetylene is 1.33×10 | 10-31-2013 |
20130315813 | APPARATUS AND METHOD FOR CONTINUOUSLY PRODUCING CARBON NANOTUBES - Disclosed are an apparatus and method for continuously producing carbon nanotubes. More specifically, disclosed are an apparatus for continuously producing carbon nanotubes including i) a reactor to synthesize carbon nanotubes, ii) a separator to separate a mixed gas from the carbon nanotubes transferred from the reactor, iii) a filter to remove all or part of one or more component gases from the separated mixed gas, and iv) a recirculation pipe to recirculate the filtered mixed gas to the reactor for carbon nanotubes. | 11-28-2013 |
20130336875 | APPARATUS AND METHOD FOR CONTINUOUSLY PRODUCING CARBON NANOTUBES - Disclosed are an apparatus and method for continuously producing carbon nanotubes. More specifically, disclosed are an apparatus for continuously producing carbon nanotubes including i) a reactor to synthesize carbon nanotubes, ii) a separator to separate a mixed gas from the carbon nanotubes transferred from the reactor, iii) a filter to remove all or part of one or more component gases from the separated mixed gas, and iv) a recirculation pipe to recirculate the filtered mixed gas to the reactor for carbon nanotubes. | 12-19-2013 |
20140030184 | Process for the Production of Nanostructured Carbon Materials - A process for producing a nanostructured carbon material including the steps of providing a metal or metalloid carbide substrate and reacting the carbide substrate with a reactive gas to form the nanostructured carbon material, the reactive gas and the carbide substrate being added during the reacting step. | 01-30-2014 |
20140065055 | METHOD FOR PRODUCING CARBON MICRO- AND NANO-COILS USING SULFUR HEXAFLUORIDE GAS - The present invention relates to a method for producing carbon micro- and nano-coils using sulfur hexafluoride gas, wherein the carbon micro- and nano-coils are synthesized and grown on a ceramic substrate and sulfur hexafluoride is introduced during the synthesis of the carbon coils to control the geometry of the carbon coils. The invention also discloses a method of producing carbon micro- and nano-coils by synthesizing and growing the carbon coils on a substrate using a chemical vapor deposition system, wherein sulfur hexafluoride (SF | 03-06-2014 |
20140120028 | Proximate atom nanotube growth - Disclosed is a proximate atom nanotube growth technology capable of continuously growing long, high quality nanotubes. The current invention represents a departure from chemical vapor deposition technology as the atomic feedstock does not originate in the gaseous environment surrounding the nanotubes. The technology mitigates the problems that cease carbon nanotube growth in chemical vapor deposition growth techniques:
| 05-01-2014 |
20140120029 | Trekking Atom Nanotube Growth - Disclosed is a trekking atom nanotube growth technology capable of continuously growing long, high quality nanotubes. This patent application is a Continuation In Part of the Proximate Atom Nanotube Growth patent application Ser. No. 13/694,088 filed on Oct. 29, 2012. The current invention represents a departure from chemical vapor deposition technology as the atomic feedstock does not originate in the gaseous environment surrounding the nanotubes. The technology mitigates the problems that cease carbon nanotube growth in chemical vapor deposition growth techniques:
| 05-01-2014 |
20140127123 | APPARATUS AND METHOD FOR CONTINUOUSLY PRODUCING CARBON NANOTUBES - Disclosed are an apparatus and method for continuously producing carbon nanotubes. More specifically, disclosed are an apparatus for continuously producing carbon nanotubes including i) a reactor to synthesize carbon nanotubes, ii) a separator to separate a mixed gas from the carbon nanotubes transferred from the reactor, iii) a filter to remove all or part of one or more component gases from the separated mixed gas, and iv) a recirculation pipe to recirculate the filtered mixed gas to the reactor for carbon nanotubes. | 05-08-2014 |
20140134093 | ALKYNE-ASSISTED NANOSTRUCTURE GROWTH - The present invention relates to the formation and processing of nanostructures including nanotubes. Some embodiments provide processes for nanostructure growth using relatively mild conditions (e.g., low temperatures). In some cases, methods of the invention may improve the efficiency (e.g., catalyst efficiency) of nanostructure formation and may reduce the production of undesired byproducts during nanostructure formation, including volatile organic compounds and/or polycylic aromatic hydrocarbons. Such methods can both reduce the costs associated with nanostructure formation, as well as reduce the harmful effects of nanostructure fabrication on environmental and public health and safety. | 05-15-2014 |
20140140916 | System for producing carbon nanotubes from combustion engine exhausts - A filtration system that uses a filter to convert wastes in automotive exhausts into carbon nanotubes is disclosed. Metallic salts, such as iron salts, may be mixed with diesel fuel by way of using algal biodiesel to ensure homogenous suspension of the metallic salts in the diesel fuel. The metallic salts form a suitable catalyst to grow carbon nanotubes on a filter placed in the pathway of the diesel combustion exhaust. The filter surface may be composed of iron of similar catalyst. The filter may be placed along the pathway of exhaust streamlines preferably at an angle of more than 5 degrees and less than 15 degrees. The filter is heated to temperatures in the range of 200-1000 degrees Celsius. The filter described in this invention can work in its own or supplement existing filtration systems. The filtration system may produce a material that is commercially valuable, synthesized carbon nanotubes. | 05-22-2014 |
20140170056 | METHOD FOR MAKING CARBON NANOTUBES - A method for making carbon nanotubes is disclosed. The method includes steps of: (a) providing a growing device, wherein the growing device comprises a reacting room having a gas inlet and a gas outlet; (b) forming a catalyst layer on a first planar surface of a growing substrate; (c) placing the growing substrate and a receiving substrate having a second planar surface in the reacting room, wherein the first planar surface and the second planar surface are parallel with each other; (d) introducing a carbonaceous gas in the reaction room to form a gas flow and growing a first plurality of carbon nanotubes from the growing substrate, wherein the first plurality of carbon nanotubes are brought above the receiving substrate by the gas flow; and (e) stopping the introducing the carbonaceous gas such that the first plurality of carbon nanotubes deposits on the receiving substrate. | 06-19-2014 |
20140186256 | REACTOR AND METHOD FOR GROWING CARBON NANOTUBE USING THE SAME - A reactor includes a reactor chamber and a carbon nanotube catalyst composite layer. The reactor chamber has an inlet and an outlet. The carbon nanotube catalyst composite layer is suspended in the reactor chamber, wherein the carbon nanotube catalyst composite layer defines a number of apertures, gases in the reactor chamber penetrate the carbon nanotube catalyst composite layer through the plurality of apertures. | 07-03-2014 |
20140199230 | METHOD AND APPARATUS FOR PRODUCING CARBON NANOTUBES - Carbon nanotubes are grown by supplying raw material gas | 07-17-2014 |
20140212353 | AUGMENTED REACTOR FOR CHEMICAL VAPOR DEPOSITION OF ULTRA-LONG CARBON NANOTUBES - Apparatus to produce carbon nanotubes (CNTs) of arbitrary length using a chemical vapor deposition (CVD) process reactor furnace is described, where the CNTs are grown axially along a portion of the length of the furnace. The apparatus includes a spindle and a mechanism for rotating the spindle. The spindle located within a constant temperature region of the furnace and operable to collect the CNT around the rotating spindle as the CNT is grown within the furnace. | 07-31-2014 |
20140286852 | SYNTHESIS OF LENGTH-SELECTED CARBON NANOTUBES - A method for producing carbon nanotubes having specific lengths, said method comprising:
| 09-25-2014 |
20140328744 | CARBON NANOTUBES AND METHOD FOR MANUFACTURING THE SAME - Disclosed are carbon nanotubes and a method for manufacturing the same. Advantageously, the method provides a high yield of potato or sphere-shaped non-bundled carbon nanotubes having a bulk density of 80 to 250 kg/m | 11-06-2014 |
20140335009 | METHOD AND APPARATUS FOR PRODUCING LONG CARBON NANOTUBES - The present invention is used to produce long carbon nanotubes used, for example, in automobile and/or aircraft industry. An object of the invention is to obtain bundles of multi-walled and well oriented nanotubes of sufficient length and provide stability of continuous nanotubes producing process. The method comprises introducing a carbon-bearing component, a promoter and a precursor of a carbon nanotube growth catalyst in a carrier gas stream to form a mixture of these components; passing said mixture through the a reactor heated to an operating temperature of 1000° C. to 1200° C. and removing nanotubes formed in the reactor into a product receiver. The mixture is fed in the reactor from the bottom upwards at a linear flow velocity of 50 mm/c to 130 mm/c. When the temperature in the reactor reaches said operating temperature, the linear flow velocity of the mixture is decreased to 4-10 mm/c, and the linear flow velocity is increased to 30-130 mm/c at the outlet of the reactor. The apparatus comprises means for introducing the carbon-bearing component, the promoter and the precursor of the carbon nanotube growth catalyst in the carrier gas stream, a vertical reactor with a working chamber, means for heating the working chamber to the operating temperature, means for delivering the mixture to the working chamber of the reactor and means for removing products from the working chamber. The chamber is made of three successive sections, namely a lower inlet | 11-13-2014 |
20140348739 | METHOD AND SYSTEMS FOR FORMING CARBON NANOTUBES - Systems and a method for forming carbon nanotubes are described. A method includes forming carbon nanotubes in a reactor, using a Bosch reaction. The carbon nanotubes are separated from a reactor effluent to form a waste gas stream. The feed gas, a dry waste gas stream, or both, are heated with waste heat from the waste gas stream. The waste gas stream is chilled in an ambient temperature heat exchanger to condense water vapor, forming a dry waste gas stream. | 11-27-2014 |
20140369921 | APPARATUS AND METHOD FOR PRODUCING NANOCARBON MATERIAL - Catalyst support means for producing a fluid catalyst; a reduction basin that pretreats an active metal of the obtained fluid catalyst in a reducing atmosphere; a fluid bed reactor which is supplied with a reduction-treated fluid catalyst having undergone the reduction, for producing a nanocarbon material; and a moisture application basin for supplying a slight amount of moisture to a source gas to be supplied to the aforementioned fluid bed reactor are provided. | 12-18-2014 |
20150023864 | METHOD FOR MANUFACTURING CARBON NANOTUBE FILM - A method for manufacturing a large-area carbon nanotube film is provided. A helical-shaped substrate having a smoothly curved surface configured for growing carbon nanotube film thereon is provided. The helical-shaped substrate is fixed in a reactor chamber using a supporter. The helical-shaped substrate gradually increases along an axis of the reactor chamber, and the supporter is substantially perpendicular to the axis of the reactor chamber. A catalyst layer is formed on the smoothly curved surface of the substrate. A carbon nanotube film is grown on the smoothly curved surface of the helical-shaped substrate by a chemical vapor deposition process. | 01-22-2015 |
20150037240 | METHODS OF PREPARING CATALYSTS FOR THE CHIRALLY SELECTIVE SYNTHESIS OF SINGLE-WALLED CARBON NANOTUBES - Methods of preparing a sulfur-containing catalyst for the chirally selective synthesis of single-walled carbon nanotubes are presented. Sulfur-containing catalysts for the chirally selective synthesis of single-walled carbon nanotubes, the catalysts comprising sulfur-doped transition metal as active phase on a support, and methods of forming single-walled carbon nanotubes having a selected chirality using the catalysts are also presented. | 02-05-2015 |
20150064097 | CARBON NANOTUBES HAVING A BIMODAL SIZE DISTRIBUTION - A composition comprising a mixture of carbon nanotubes having a bi-modal size distribution are produced by reducing carbon oxides with a reducing agent in the presence of a catalyst. The resulting mixture of nanotubes include a primary population of multiwall carbon nanotubes having characteristic diameters greater than 40 nanometers, and a secondary population of what are apparently single wall nanotubes with characteristic diameters of less than 30 nanometers. The resulting mixture may also contain one or more other allotropes and morphologies of carbon in various proportions. The mixture of carbon nanotubes has specific apparently uncommon properties, including unusual resistivity and density | 03-05-2015 |
20150078981 | METHODS FOR USING METAL CATALYSTS IN CARBON OXIDE CATALYTIC CONVERTERS - A method of reducing a gaseous carbon oxide includes reacting a carbon oxide with a gaseous reducing agent in the presence of a steel catalyst. The reaction proceeds under conditions adapted to produce solid carbon of various allotropes and morphologies the selective formation of which can be controlled by means of controlling reaction gas composition and reaction conditions including temperature and pressure. A method for utilizing a steel catalyst for reducing carbon oxides includes placing the steel catalyst in a suitable reactor and flowing reaction gases comprising a carbon oxide with at least one gaseous reducing agent through the reactor where, in the presence of the steel catalyst, at least a portion of the carbon in the carbon oxide is converted to solid carbon and a tail gas mixture containing water vapor. | 03-19-2015 |
20150078982 | METHODS AND SYSTEMS FOR CAPTURING AND SEQUESTERING CARBON AND FOR REDUCING THE MASS OF CARBON OXIDES IN A WASTE GAS STREAM - Methods of capturing or sequestering carbon include introducing a reaction gas stream to a catalytic converter to convert a portion of the carbon in the carbon oxide to solid carbon and a tail gas stream containing water vapor, removing the solid carbon from the catalytic converter for use, disposal, or storage, and recycling at least a portion of the tail gas stream to the catalytic converter. Methods may also include removing a portion of the water from the tail gas stream. The tail gas stream includes a portion of the initial process gas stream and at least a portion of water vapor produced in the catalytic converter. Methods may also include removing water vapor from various streams and reacting the carbon oxide with a reducing agent in the presence of a catalyst. Systems for capturing or sequestering carbon from a gaseous source containing carbon oxides are also described. | 03-19-2015 |
20150086469 | Method for Manufacturing Carbon Fiber, and Carbon Fiber - In the present invention, a starting material liquid including a carbon compound and a catalyst or a catalyst precursor, and a reaction vessel having a high-temperature zone heated to 900-1,300° C. are prepared. The starting material liquid is introduced into the reaction vessel, and a mixture is generated which comprises a gas including a carbon source, and catalyst microparticles dispersed in the gas. A carrier gas is then introduced in pulses into the reaction vessel, and the mixture is pushed out to the high-temperature zone. The carbon source and catalyst microparticles included in the mixture are then brought into contact with each other in the high-temperature zone, initial fibers are grown, and carbon fibers are subsequently grown in an environment in which the carrier gas is retained. | 03-26-2015 |
20150093323 | GENERATING CATALYSTS FOR FORMING CARBON ALLOTROPES - A system and methods for forming carbon allotropes are described. The system includes a reactor configured to use a catalyst to form a carbon allotrope from a feed stock in a Bosch reaction. The catalyst includes a roughened metal surface. | 04-02-2015 |
20150147261 | CARBONACEOUS FEEDSTOCKS FOR FORMING CARBON ALLOTROPES - Methods and systems are provided for forming carbon allotropes. An exemplary method includes treating a carbonaceous compound to form a feedstock that includes at least about 10 mol % oxygen, at least about 10 mol % carbon, and at least about 20 mol % hydrogen. Carbon allotropes are formed from the feedstock in a reactor in a Bosch reaction at a temperature of at least about 500° C. The carbon allotropes are separated from a reactor effluent stream. | 05-28-2015 |
20150147262 | CARBON-CONTAINING METAL CATALYST PARTICLES FOR CARBON NANOTUBE SYNTHESIS AND METHOD OF PRODUCING THE SAME, CATALYST CARRIER SUPPORT, AND METHOD OF PRODUCING CARBON NANOTUBES - The present invention relates to metal catalyst particles for carbon nanotube synthesis, comprising carbon-containing regions on their surfaces. | 05-28-2015 |
20150147263 | CARBON NANOTUBES AND PRODUCTION METHOD THEREOF - The present invention relates to a method of producing carbon nanotubes, comprising a catalyst particle forming step of heating and reducing a catalyst raw material to form catalyst particles and a carbon nanotube synthesizing step of flowing a raw material gas onto the heated catalyst particles to synthesize carbon nanotubes, wherein a carbon-containing compound gas without an unsaturated bond is flowed onto the catalyst raw material and/or the catalyst particles in at least one of the catalyst particle forming step and the carbon nanotube synthesizing step. | 05-28-2015 |
20150321918 | METHODS FOR PRODUCING SOLID CARBON BY REDUCING CARBON DIOXIDE - A two-stage reaction process includes reacting gaseous carbon dioxide with a reducing agent to form carbon monoxide and water. At least a portion of the water is condensed to form a dry tail gas. The dry tail gas, with the possible addition of a reducing agent, reacts to convert at least a portion of the carbon monoxide to solid carbon and water. Other methods include reacting a feed gas mixture to form a reaction mixture, condensing water from the reaction mixture to form a dried reaction mixture, mixing the dried reaction mixture with a recirculating gas to form a catalytic converter feed gas mixture, flowing the catalytic converter feed gas mixture through a catalytic converter to form solid carbon and a tail gas mixture containing water, and flowing the tail gas mixture through a heat exchanger. | 11-12-2015 |
20160009557 | METHOD FOR CONTINUOUS AND CONTROLLABLE PRODUCTION OF SINGLE WALLED CARBON NANOTUBES | 01-14-2016 |
20160016800 | REACTORS, SYSTEMS, AND METHODS FOR FORMING SOLID PRODUCTS - A reactor includes a vessel, a gas inlet, a solid outlet, a catalyst support configured to at least partially retain a catalyst material and allow a tail gas to pass therethrough, and a tail gas outlet. The gas inlet is in fluid communication with the solid outlet. A system for producing a solid product includes a reactor, a compressor, a heater, a make-up reactive gas inlet, and a solids discharge means for removing the solid product from the solid outlet of the reactor. Methods of forming solid products include providing a catalyst material in a vessel having a porous catalyst support, delivering a reactive gas to the vessel, reacting the reactive gas to form a solid product and a tail gas in the vessel, passing the tail gas through a portion of the catalyst material to separate the solid product from the tail gas, and removing the solid product. | 01-21-2016 |
20160031710 | CARBON OXIDE REDUCTION WITH INTERMETALLIC AND CARBIDE CATALYSTS - A method of reducing a gaseous carbon oxide includes reacting a carbon oxide with a gaseous reducing agent in the presence of an intermetallic or carbide catalyst. The reaction proceeds under conditions adapted to produce solid carbon of various allotropes and morphologies, the selective formation of which can be controlled by means of controlling reaction gas composition and reaction conditions including temperature and pressure. A method for utilizing an intermetallic or carbide catalyst in a reactor includes placing the catalyst in a suitable reactor and flowing reaction gases comprising a carbon oxide with at least one gaseous reducing agent through the reactor where, in the presence of the catalyst, at least a portion of the carbon in the carbon oxide is converted to solid carbon and a tail gas mixture containing water vapor. | 02-04-2016 |
20160039677 | DIRECT COMBUSTION HEATING - An electrode includes a network of compressed interconnected nanostructured carbon particles such as carbon nanotubes. Some nanostructured carbon particles of the network are in electrical contact with adjacent nanostructured carbon particles. Electrodes may be used in various devices, such as capacitors, electric arc furnaces, batteries, etc. A method of producing an electrode includes confining a mass of nanostructured carbon particles and densifying the confined mass of nanostructured carbon particles to form a cohesive body with sufficient contacts between adjacent nanostructured carbon particles to provide an electrical path between at least two remote points of the cohesive body. The electrodes may be sintered to induce covalent bonding between the nanostructured carbon particles at contact points to further enhance the mechanical and electrical properties of the electrodes. | 02-11-2016 |
20160083256 | CONTINUOUS PROCESS FOR THE PRODUCTION OF NANOSTRUCTURES INCLUDING NANOTUBES - The present invention provides methods for uniform growth of nanostructures such as nanotubes (e.g., carbon nanotubes) on the surface of a substrate, wherein the long axes of the nanostructures may be substantially aligned. The nanostructures may be further processed for use in various applications, such as composite materials. For example, a set of aligned nanostructures may be formed and transferred, either in bulk or to another surface, to another material to enhance the properties of the material. In some cases, the nanostructures may enhance the mechanical properties of a material, for example, providing mechanical reinforcement at an interface between two materials or plies. In some cases, the nanostructures may enhance thermal and/or electronic properties of a material. The present invention also provides systems and methods for growth of nanostructures, including batch processes and continuous processes. | 03-24-2016 |