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:
An engine exhaust gas purifying catalyst contains, as active substances, platinum and at least one of iridium, III-B metals and IV-B metals. In particular, the catalyst contains mainly platinum and iridium and, desirably, rhodium as an additive catalyst substance.
摘要:
A catalyst layer includes: a first mixed oxide particle component 4 which contains Ce and Rh 8 and in which Rh is partially exposed at particle surfaces; and a second mixed oxide particle component 5 containing Ce, Zr, and a rare earth metal except Ce. The particle size distribution of the first mixed oxide particle component 4 has a peak in the particle size range from 100 nm to 300 nm, both inclusive. The particle size distribution of the second mixed oxide particle component 5 has a peak in a particle size range larger than the particle size range in which the first mixed oxide particle component 4 has the peak. At least part of particles of the first mixed oxide particle component 4 is attached to at least part of particles of the second mixed oxide particle component 5.
摘要:
An exhaust gas purifying catalyst includes a carrier and a catalyst layer provided on the carrier. The catalyst layer includes active Al2O3 on which a noble metal is carried, an oxygen storage agent on which Rh is carried, Al2O3 coated with ZrO2 on which Rh is carried, and a binder material.
摘要翻译:废气净化催化剂包括载体和设置在载体上的催化剂层。 催化剂层包括其上载有贵金属的活性Al 2 O 3 N 3,携带有Rh的储氧剂,Al 2 O 3, 在其上携带有Rh的ZrO 2 N 2上涂覆的O 3和粘合剂材料。
摘要:
An exhaust gas purifying catalyst includes a carrier and a catalyst layer provided on the carrier. The catalyst layer includes active Al2O3 on which a noble metal is carried, an oxygen storage agent on which Rh is carried, Al2O3 coated with ZrO2 on which Rh is carried, and a binder material.
摘要翻译:废气净化催化剂包括载体和设置在载体上的催化剂层。 催化剂层包括载有贵金属的活性Al 2 O 3,载有Rh的储氧剂,携带有Rh的ZrO 2涂覆的Al 2 O 3和粘合剂材料。
摘要:
A catalytic base material for an exhaust gas purifying catalyst is produced by impregnating ceria powders with a barium contained solution and heating the ceria particles at approximately 400 to 1100° C. to create and accumulate barium oxides fixed to surfaces of the ceria particles.
摘要:
An exhaust gas emission control catalyst includes an under catalyst layer containing at least one of barium and lanthanum and an over catalyst layer containing an agent for absorbing water in a gas, at least one of the under catalyst layer and over catalyst layer containing catalytic metal.
摘要:
An exhaust gas purifying catalyst contains a NOx absorbing component which comprises at least one kind of element selected from a group of alkaline earth metals, a group of alkaline metals and a group of rare earth elements and a component, other than the NOx absorbing component, selected between K and Na. The catalyst has a such a structure that the component other than the NOx absorbing component is brought into contact with an exhaust gas before the NOx absorbing component is brought into contact with the exhaust gas.
摘要:
An exhaust gas purifying catalyst is provided by coating a slurry of a mixture of a powdered first catalyst provided by carrying Pt on a mixture of alumina and ceria and a powdered second catalyst provided by carrying Rh on manganese oxide on a support member and then impregnating the coated layer with a solution of barium.
摘要:
An exhaust gas purifying system includes an exhaust gas purifying catalyst having a nitrogen oxide absorbing material which is installed in an exhaust line of an engine and performs split fuel injection to inject fuel directly into each combustion chamber partly during a suction stroke and partly during a compression stroke to provide and supply an increased amount of carbon monoxide to the nitrogen oxide absorbing material so as thereby to desorb sulfur oxides from the nitrogen oxide absorbing material.