| 摘要 |
PURPOSE:To obtain a catalyst for purifying exhaust gas which is capable of simultaneously removing three components of CO, HC and NOx at a small amount without using rhodium by carrying a catalytic active component consisting of titanium oxide, silicon oxide and the other oxide on a carrier having a monolithic structure. CONSTITUTION:A catalyst for purifying exhaust gas described below is obtained by carrying a mixture of a catalytic active component consisting of 0.5-30g palladium, 0.1-50g alkaline earth metal oxide, 10-150g cerium oxide, 0.1-50g zirconium oxide, 1-150g titanium oxide and 0.05-50g silicon oxide for 1l of the catalyst and 10-300g activated alumina on a carrier having a monolithic structure. The catalyst for purifying exhaust gas is used for simultaneously removing carbon monoxide, hydrocarbons and nitrogen oxide from the exhaust gas of an internal combustion engine. Thereby both purification capacity of NOx in a state rich in the exhaust gas of the engine and purification capacity of CO, HC and NOx wherein the composition of gaseous fuel is close to a stoichiometric ratio are remarkably enhanced. |
