EXHAUST GAS PURIFICATION CATALYST

摘要

PURPOSE:To provide a catalyst having higher exhaust gas purification ability than a conventional catalyst as a method for efficiently removing NOx from exhaust gas contg. excess oxygen as well as NOx and hydrocarbon. CONSTITUTION:This exhaust gas purification catalyst is a catalyst for removal of NOx from exhaust gas contg. excess oxygen as well as NOx and hydrocarbon and contains Co, Pd and Ag in zeolite.