초록 ▼

A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine, includes followings (i) a catalyst giving an excellent light-off performance at low temperatures, including a carrier and a catalyst layer supported thereon, the catalyst layer including a precious m

A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine, includes followings (i) a catalyst giving an excellent light-off performance at low temperatures, including a carrier and a catalyst layer supported thereon, the catalyst layer including a precious metal and a substance having an electron donatability and/or a nitrogen dioxide absorbability and releasability, and (ii) an adsorbent comprising a carrier and an adsorbent layer having a hydrocarbon adsorbability, supported on the carrier. This system for exhaust gas purification can effectively purify the harmful substances contained in the exhaust gases discharged from internal combustion engines of automobiles, etc., particularly the hydrocarbons discharged in a large amount from a gasoline engine during cold start.

대표청구항 ▼

[ What is claimed is:] [1.] A system for exhaust gas purification disposed in an exhaust pipe of an internal combustion engine, comprising:a catalyst composition giving an excellent light-off performance at low temperatures, which comprises a precious metal and a substance having at least one of an

[ What is claimed is:] [1.] A system for exhaust gas purification disposed in an exhaust pipe of an internal combustion engine, comprising:a catalyst composition giving an excellent light-off performance at low temperatures, which comprises a precious metal and a substance having at least one of an electron donatability and a nitrogen dioxide absorbability and releasability, andoptionally an adsorbent having hydrocarbon adsorbability.