PURPOSE: To obtain a catalyst for purifying exhaust gas which is capable of simultaneously removing three components of CO, HC and NOx at an extremely small amount without using rhodium.
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 metallic oxide, 10-100g cerium oxide, 0.1-50g zirconium oxide and 1-150g titanium 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 raito are remarkably enhanced.
BABA HIDEYUKI
TSUCHIYA KAZUO
OHATA TOMOHISA
