PURIFYING METHOD FOR EXHAUST GAS

摘要

PURPOSE:To provide the purifying method which efficiently purifies in a wide temp. range HOx, CO and HC contained in an exhaust gas in an excess oxygen atmosphere. CONSTITUTION:In simultaneously purifying carbon monoxide, hydrocarbon and nitrogen oxide contained in the exhaust gas in an excess oxygen atmosphere, the exhaust gas containing excess oxygen is brought into contact with the catalyst for purifying exhaust gas carrying alkaline-earth oxide, copper oxide and platinum on the carrier consisting of a porous body.