| 摘要 |
PURPOSE:To obtain a catalyst for effectively purifying a harmful material in an exhaust gas, particularly hydrocarbons at the time of cold starting by consisting it essentially of a particle obtained by carrying a noble metal on a heat resistant inorganic oxide as a catalytic material, specifying Pb content, and using a particle consisting essentially of zeolite as an adsorbent. CONSTITUTION:A catalyst-adsorbent covered body composed of the catalytic material for decreasing carbon monoxide, hydrocarbons or the like and the adsorbent for decreasing hydrocarbons at the time of cold starting is carried on a monolith carrier. The catalytic material consists essentially of a catalytic particle formed by carrying one noble metal among Pt, Pd and Pd on the heat resistant inorganic oxide and, in this case, Pd of 2-30wt.% per the heat resistant inorganic oxide is contained. The adsorbent is composed of an adsorbing particle consisting essentially of zeolite. |
