Patent application number | Description | Published |
20080254978 | EXHAUST GAS PURIFYING CATALYST AND METHOD OF PRODUCING THE SAME - Disclosed is an exhaust gas purifying catalyst exhibiting excellent purification performance for a long period of time by suppressing coagulation of a noble metal. A catalyst powder comprises a noble metal and first and second compounds. In the catalyst powder, the first compound carries the noble metal and is separated from another first compound carrying a noble metal by the second compound. At least one catalyst layer comprising the catalyst powder is formed on an inner surface of a substrate. The catalyst layer has fine pores. A fine pore volume of fine pores having a fine pore diameter of greater than 0.1 μm to less than or equal to 1 μm is 10% to 60% of the fine pore volume of fine pores having a fine pore diameter of 0.1 μm or less. | 10-16-2008 |
20080318769 | Catalyst and Method for Manufacturing Catalyst for Use in Exhaust Emission Control - A catalyst ( | 12-25-2008 |
20090280978 | EXHAUST GAS PURIFYING CATALYST AND METHOD OF PRODUCING EXHAUST GAS PURIFYING CATALYST - An exhaust gas purifying catalyst | 11-12-2009 |
20110034331 | EXHAUST GAS PURIFYING CATALYST AND PRODUCTION METHOD THEREOF - An exhaust gas purifying catalyst including: a plurality of first compounds | 02-10-2011 |
20120131911 | EXHAUST GAS PURIFYING CATALYST AND METHOD FOR MANUFACTURING THE SAME - An exhaust gas purifying catalyst ( | 05-31-2012 |
20120322652 | EXHAUST GAS PURIFYING CATALYST AND METHOD FOR MANUFACTURING THE SAME - An exhaust gas purifying catalyst includes: rhodium; a zirconium-containing oxide which supports rhodium, and comprises: at least one element selected from the group consisting of calcium, lanthanum, cerium, neodymium and yttrium; and zirconium; and a NOx absorbing material comprising at least one selected from the group consisting of magnesium, barium, sodium, potassium and cesium. A degree of dispersion of rhodium is 20% or more after baking at 900° C. in air for three hours. A method for manufacturing the exhaust gas purifying catalyst includes: mixing the zirconium-containing oxide with water, thereby preparing an aqueous liquid of the zirconium-containing oxide; and supporting rhodium on the zirconium-containing oxide by mixing the aqueous liquid of the zirconium-containing oxide with an aqueous solution of a rhodium salt. A pH of a mixed liquid of the aqueous solution of the rhodium salt and the aqueous liquid of the zirconium-containing oxide is adjusted to 7 or more. | 12-20-2012 |
20130157844 | EXHAUST GAS PURIFYING CATALYST AND PRODUCTION METHOD THEREOF - An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. | 06-20-2013 |
20130177484 | LEAN NOx TRAP TYPE EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFICATION SYSTEM - A lean NOx trap type exhaust gas purifying catalyst having a catalyst noble metal selected from a group consisting of platinum, palladium and rhodium, an inorganic oxide that carries the catalyst noble metal, and at least one NOx adsorbent one selected from a group of magnesium, barium, sodium, potassium and cesium. The inorganic oxide carrying palladium containing cerium in a CeO2-equivalent quantity in a range of 1 to 20 wt %, and at least one of aluminum and zirconium. | 07-11-2013 |