| 摘要 |
PURPOSE:To provide a catalyst for purification of exhaust gas capable of efficient removal of NOx, CO and hydrocarbon in exhaust gas while effectively utilizing the hydrocarbon in the practical running state of an automobile, etc. CONSTITUTION:A catalyst obtd. by carrying platinum or palladium and at least one kind of metal selected among lanthanum, alkali metals and alkaline earth metals on a carrier made of a porous body is combined with a hydrocarbon adsorbent to obtain the objective catalyst for purification of exhaust gas used for simultaneous removal of CO, hydrocarbon and NOx incorporated in exhaust gas in an atmosphere contg. excess oxygen. |
