Parkhurst & Wendel, L.L.P.
System for exhaust gas purification and method for exhaust gas purification using said system
 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. 
NGK Insulators, Ltd.
Y B B B B F F Y F F
Y02T B01J B01D B01J B01D F01N F01N Y02A F01N F01N
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Naomi Hiroshige Akira Yukinari
Noda Mizuno Takahashi Shibagaki