CATALYST FOR CLARIFYING EXHAUST EMISSION FROM INTERNAL COMBUSTION ENGINE, METHOD FOR PREPARATION THEREOF, AND METHOD FOR CLARIFYING EXHAUST EMISSION FROM INTERNAL COMBUSTION ENGINE

摘要

A catalyst element for clarifying an exhaust emission from an internal combustion engine, which comprises an open-flow type honeycomb having an average pore diameter of pores in passage walls of 10 to 40 mum. The catalyst element allows the removal of particulates, SOF, sulfates, SOOT and the like from an exhaust emission from an internal combustion engine with good efficiency, without elevation of the back pressure of the engine.