Sinocat Environmental Technology Co., Ltd.

Sinotech Company Limited

Tiantian Luo

Yun Li

Qizhang Chen

Yongxiang Cheng

Yun Wang

Yanhua Zhang

Lan Yang

Qin Wang

Yinhua Dong

Yi Dan

Dacheng Li

Hongyi Du

Zan Zhu

Feng Zhang

Yi Yang

Jinfeng Wang

Hui Ye

Li Lan

A cerium-zirconium-aluminum-based composite material, a cGPF catalyst and a preparation method thereof are provided. The cerium-zirconium-aluminum-based composite material adopts a stepwise precipitation method, firstly preparing an aluminum-based pre-treated material, then coprecipitating the aluminum-based pre-treated material with zirconium and cerium sol, and finally roasting at high temperature to obtain the cerium-zirconium-aluminum-based composite material. The cerium-zirconium-aluminum-based composite material has better compactness and higher density, and when it is used in cGPF catalyst, it occupies a smaller volume of pores on the catalyst carrier, such that cGPF catalyst has lower back pressure and better ash accumulation resistance, which is beneficial to large-scale application of cGPF catalyst.

Cerium-zirconium-aluminum-based composite material, cGPF catalyst 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

Tiantian Luo