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    • 2. 发明专利
    • An exhaust gas purifying catalyst
    • 排气净化催化剂
    • JP2012217933A
    • 2012-11-12
    • JP2011086457
    • 2011-04-08
    • Toyota Motor Corpトヨタ自動車株式会社
    • TAKAGI NOBUYUKISOFUE YUICHIIKEDA HIDEYOSHIINDE RYOICHI
    • B01J23/44B01D53/86B01D53/94F01N3/08F01N3/10F01N3/24F01N3/28
    • PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst excellent in the purification capacity for carbon monoxide even under a low temperature condition.SOLUTION: The exhaust gas purifying catalyst includes a base material 54, a lower layer 60 arranged on the base material 54 and an upper layer 62 arranged on the lower layer 60. The lower layer 60 has a carrier 64 and Pd particles 66 and Pt particles 68 supported on the carrier 64 as noble metals. Further, the upper layer 62 has the carrier 64, the Pd particles 66 supported on the carrier 64 as the noble metals and a hydrocarbon adsorbing material 70. In this exhaust gas purifying catalyst, the HC poisoning of the catalyst is suppressed and the purification capacity for carbon monoxide under the low temperature condition is enhanced.
    • 要解决的问题:即使在低温条件下也提供一氧化碳的净化能力优异的排气净化催化剂。 解决方案:废气净化催化剂包括基材54,布置在基材54上的下层60和布置在下层60上的上层62.下层60具有载体64和Pd颗粒66 和作为贵金属负载在载体64上的Pt颗粒68。 此外,上层62具有载体64,作为贵金属担载在载体64上的Pd颗粒66和烃吸附材料70.在该废气净化催化剂中,催化剂的HC中毒被抑制,并且净化能力 对于一氧化碳在低温条件下的增强。 版权所有(C)2013,JPO&INPIT
    • 7. 发明专利
    • Catalyst for exhaust gas purification
    • 催化剂用于排气净化
    • JP2012187519A
    • 2012-10-04
    • JP2011053405
    • 2011-03-10
    • Toyota Motor Corpトヨタ自動車株式会社
    • IKEDA HIDEYOSHIMIURA MASAHIDE
    • B01J23/63B01D53/94F01N3/10
    • PROBLEM TO BE SOLVED: To provide a catalyst for exhaust gas purification that can still maintain the purification performance thereof even if subjected to high temperature exhaust gas (e.g., 600-1,100°C).SOLUTION: The catalyst 1 for exhaust gas purification includes a porous carrier 20, and palladium 30 carried by the porous carrier 20. The porous carrier 20 contains a CZ carrier 10 composed of ceria-zirconia composite oxide, and a silica-alumina carrier 12 composed of alumina to which silica is added. The palladium 30 is selectively carried by the CZ carrier. In this type of the catalyst for exhaust gas purification, the interaction of a silica component and the palladium 30 in the silica-alumina carrier 12 improves the catalytic activity in a high temperature (e.g., 600-1,100°C).
    • 要解决的问题:提供即使经受高温废气(例如600-1100℃)仍能保持其净化性能的废气净化用催化剂。 废气净化用催化剂1包括多孔载体20和由多孔载体20承载的钯30.多孔载体20含有由二氧化铈 - 氧化锆复合氧化物构成的CZ载体10和二氧化硅 - 氧化铝 载体12由添加了二氧化硅的氧化铝组成。 钯30由CZ载体选择性携带。 在这种类型的废气净化用催化剂中,二氧化硅 - 氧化铝载体12中的二氧化硅组分和钯30的相互作用改善了在高温(例如600-1100℃)下的催化活性。 版权所有(C)2013,JPO&INPIT
    • 9. 发明专利
    • Catalyst for purifying exhaust gas
    • 用于净化排气的催化剂
    • JP2012050961A
    • 2012-03-15
    • JP2010197850
    • 2010-09-03
    • Toyota Motor Corpトヨタ自動車株式会社
    • MATSUBARA HIROYUKIIKEDA HIDEYOSHI
    • B01J23/58B01D53/94B01J37/02F01N3/10
    • PROBLEM TO BE SOLVED: To improve a catalytic performance in a catalyst using Pd without increasing a hydrogen sulfide discharge.SOLUTION: The catalyst for purifying exhaust gas, provided with a catalyst layer having the bilayer consisting of an upper layer and a lower layer provided on a catalyst carrier perpendicular to an exhaust gas flow direction, is composed of: a front part on an exhaust gas upstream side in which the upper layer consists of a composite oxide of Zr and Ce and an alumina which support Rh, and the lower layer consists of a composite oxide of Zr and Ce and an alumina which support Pd; and a rear part on an exhaust gas downstream side that consists of the composite oxide of Zr and Ce and an alumina which support Rh. A basic substance is added only to the front part, and additionally, the length of the upper layer part in the exhaust gas flow direction is shorter than the length of the lower layer part in the exhaust gas direction.
    • 要解决的问题:为了提高催化剂中使用Pd而不增加硫化氢排放的催化性能。 解决方案:提供具有由垂直于废气流动方向设置在催化剂载体上的由上层和下层组成的双层的催化剂层的排气净化用催化剂由以下部分组成: 废气上游侧,其上部由Zr和Ce的复合氧化物和支撑Rh的氧化铝组成,下层由Zr和Ce的复合氧化物和支持Pd的氧化铝组成; 以及由Zr和Ce的复合氧化物和支撑Rh的氧化铝构成的废气下游侧的后部。 基本物质仅添加到前部,另外,排气流动方向上的上层部的长度比排气气体方向的下层部的长度短。 版权所有(C)2012,JPO&INPIT