摘要:
In the exhaust gas purifying catalyst (3), palladium is contained as a catalytic component and cerium oxide and (Ce, Pr) compound oxide is contained as a promoter. Now, the weight ratio of cerium oxide to (Ce, Pr) compound oxide is set between 9/1 and 7/3, and the ratio of praseodymium to cerium in the (Ce, Pr) compound oxide is set between 3 mol % and 50 mol %. In this way, because in this exhaust gas purifying catalyst (3), palladium with high low-temperature activity is used for a catalytic component, the exhaust gas purifying performance at low temperature is improved. And because cerium oxide and (Ce, Pr) compound oxide improves catalytic activity of palladium at high temperature, the exhaust gas purifying performance at high temperature, in particular, NOx purifying performance, is improved.
摘要:
A twisted pair wire includes a pair of covered wires each formed by covering stranded conductors with a covering body. The covering body includes a covering body material including a silane coupling agent. Alternatively, the covering body includes a plurality of covering layers, and an innermost layer of the plurality of covering layers contacting with the stranded conductors includes a covering body material including a silane coupling agent.
摘要:
The active temperature of an exhaust gas cleaning catalyst is shifted to a higher temperature side when Al.sub.2 O.sub.3 and/or CeO.sub.2 is used as a co-catalyst and/or when an oxidation number of Pt or Ir which is used as the noble active component is plus four.
摘要翻译:当使用Al 2 O 3和/或CeO 2作为助催化剂时和/或当用作贵金属活性组分的Pt或Ir的氧化数为正时,排气净化催化剂的活性温度转移到较高温度侧 四。
摘要:
A catalyst (3) for purifying an automotive exhaust gas, in which inner and outer catalytic layers (5,6), each of which has a base material and a catalytic material held by the base material, are stratified on a honeycomb-type carrier (4). In the catalyst (3), the inner catalytic layer (5) contains a palladium component as the catalytic component. Further the inner catalytic layer (5) contains a nickel oxide component for preventing poisoning of the palladium component. On the other hand, though the outer catalytic layer (6) contains a rhodium component as the catalytic component, it does not contain a palladium component nor a nickel oxide component.
摘要:
A twisted pair wire includes a pair of covered wires each formed by covering stranded conductors with a covering body. The covering body includes a covering body material including a silane coupling agent. Alternatively, the covering body includes a plurality of covering layers, and an innermost layer of the plurality of covering layers contacting with the stranded conductors includes a covering body material including a silane coupling agent.
摘要:
An exhaust gas purifying catalyst (3) has an inner catalytic layer (5) fixed on a carrier (4). In the inner catalytic layer (5), there are held a palladium component, platinum component and a rhodium component by a base material containing an alumina component composed of alumina impregnated with lanthanum. Further, the exhaust gas purifying catalyst (3) has an outer catalytic layer (6) formed on the inner catalytic layer (5). In the outer catalytic layer (6), a palladium component is held by a base material which contains an alumina component, an oxide complex of ceria and zirconia and a magnesium component.