PURPOSE: To obtain a catalyst for purifying an exhaust gas exhibiting excellent purifying performance even in lean region of internal combustion engine by providing a coating layer made of an inorganic material essentially containing a copper containing Fe-silicate as a metallosilicate on a honeycomb carrier.
CONSTITUTION: The catalyst for purifying the exhaust gas of internal combustion engine is constituted by providing the coat layer made of the inorganic material mainly containing the Cu containing Fe-silicate as the metallosilicate on the honeycomb carrier. The catalyst for purifying the exhaust gas constituted in this way exhibits excellent exhaust gas purifying performance even in the lean region of the internal combustion engine exhaust gas containing a large quantity of oxygen. Specifically by carrying Cu as an active metal on the Fe silicate, purifying performance for all of HC, CO and NOX is improved. Ion exchange method, impregnation method or the like is elected as a method for carrying Cu.
MASUDA GOJI
KANESAKA HIROYUKI
