Sinocat Environmental Technology Co., Ltd.

Ganxue Wu

Yun Li

Qizhang Chen

Yun Wang

Yaoqiang Chen

Yongxiang Cheng

Hongyi Du

Xi Feng

Zhimin Liu

Yanhua Zhang

Dongdong Wu

Kuan Wei

Ruifang Wang

Jie Wen

Xueqing Zhou

Dong Zeng

Guangfa Zu

Yi Yan

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

A method for preparing a molecular sieve SCR (selective catalytic reduction) catalyst and a prepared catalyst therethrough. In the method, several molecular sieves are mixed and modified by transition metal or rare-earth metal via ion exchange, then loaded Fe by equivalent-volume impregnation, and loaded Cu by one or more liquid ion exchange. This present invention, combined with several techniques, such as modification of stable molecular sieve by transition and rare-earth metal, Fe loading by equivalent-volume impregnation and Cu loading by one or more liquid ion exchange, and after through stable and effective modification and loading control, the obtained catalyst material is coated on a carrier substrate via size mixing and coating process to be prepared into an integral catalyst.

Method for preparing molecular sieve SCR catalyst, and catalyst prepared therethrough

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Chengdu, China

Ganxue Wu