Sinocat Environmental Technology Co., Ltd.

Hongyi Du

Yun Wang

Yun Li

Qizhang Chen

Yongxiang Cheng

Yanhua Zhang

Ganxue Wu

Yi Dan

Qin Wang

Tiantian Luo

Guangfa Zu

Yi Yan

Zan Zhu

Xueqing Zhou

Dongdong Wu

Disclosed in the present invention is an integrated catalyst system for stoichiometric-burn natural gas vehicles, the catalyst system consisting of a three-way catalyst, a molecular sieve catalyst, and a base body, the three-way catalyst and the molecular sieve catalyst being coated on a surface of the base body. In the integrated three-way catalyst and molecular sieve catalyst system of the present invention, at the same time that pollutants such as CO, HC, and NOin the exhaust of stoichiometric-burn natural gas vehicles are processed, the produced byproduct NHcan also be processed, and the conversion rates of CO, HC, NO, and NHare high.

Integrated catalyst system for stoichiometric-burn natural gas vehicles and preparation method therefor

Disclosed in the present invention is a tail gas treatment catalyst. The catalyst consists of a carrier, a first catalyst, and a second catalyst. The first catalyst and the second catalyst are provided on both ends of the carrier. The first catalyst can purify pollutants in tail gas. The second catalyst can purify a byproduct, ammonia, obtained by the purification by the first catalyst and pollutants that are not completely purified by the first catalyst. The second catalyst is of a double-layer structure; the lower layer consists of an oxygen storage material, aluminum oxide, and a second active component; the second active component is a composition of Pt and Pd, or a composition of Ce, Fe, Ni and Cu; the upper layer consists of a molecular sieve and a third active component; the third active component is Cu or a composition of Cu and Fe. The tail gas treatment catalyst of the present invention has high purification treatment efficiency, and can significantly reduce the emissions of CH, CO, and NOin the tail gas, especially reduce the content of the byproduct, NH, so that the tail gas can meet China VI emission standards.

Tail gas treatment catalyst, preparation method therefor and use thereof

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Chengdu, China

Hongyi Du