Invention Application
- Patent Title: CATALYST FOR EXHAUST GAS PURIFICATION AND SYSTEM FOR EXHAUST GAS PURIFICATION
- Patent Title (中): 用于排气净化的催化剂和排气净化系统
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Application No.: US08985206Application Date: 1997-12-04
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Publication No.: US20020057997A1Publication Date: 2002-05-16
- Inventor: HIROSHIGE MIZUNO , NAOMI NODA , YUKINARI SHIBAGAKI , AKIRA TAKAHASHI
- Priority: JP8-341834 19961220
- Main IPC: B01J008/02
- IPC: B01J008/02 ; B01J035/02 ; B01D050/00

Abstract:
A catalyst for exhaust gas purification is capable of purifying the hydrocarbons, nitrogen oxides and carbon monoxide present in the exhaust gas discharged from an internal combustion engine. The catalyst has a monolithic carrier and a catalyst layer containing Pd, Ba and a heat-resistant inorganic oxide, formed on the carrier. The amount of Pd supported on monolithic carrier is 100-300 g per ft3 of monolithic carrier (3.53null10null3 to 1.06null10null2 g per cc of monolithic carrier), the amount of Ba supported on monolithic carrier is 0.010-0.060 g per cc of monolithic carrier in terms of BaO, and the weight ratio of Pd and Ba as expressed as BaO is 1:2 to 1:10. This catalyst for exhaust gas purification is superior particularly in hydrocarbon purification for a low-temperature fuel-rich exhaust gas (such as exhaust gas emitted during cold start) of automobile.
Public/Granted literature
- US06500392B2 Catalyst for exhaust gas purification and system for exhaust gas purification Public/Granted day:2002-12-31
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