Sinocat Environmental Technology Co., Ltd.

Qin Wang

Yun Wang

Yun Li

Yongxiang Cheng

Qizhang Chen

Yaoqiang Chen

Dacheng Li

Tiantian Luo

Yanhua Zhang

Yi Dan

Hongyi Du

Zan Zhu

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

The present invention discloses a method for preparing a catalyst, comprising the following steps: (1) taking a noble metal salt solution A, adding a modified alumina support material, stirring until uniform and standing; (2) drying the material obtained in step (1) in a vacuum, and calcining at 500&#xb0; C.-600&#xb0; C. for 1-4 hours to obtain a powder material containing the noble metal; (3) mixing the noble metal powder material, an adhesive and other components to be added, and ball-milling to obtain a uniform slurry; (4) preparing a noble metal solution B and adjusting pH to 0.5-1; and (5) mixing the slurry of the step (3) with the noble metal solution B, coating the mixture on a support, drying, and calcining at 500&#xb0; C.-600&#xb0; C. for 1-2 hours to obtain the target product. The method for preparing the catalyst of the present invention is simple, the conditions of the preparation process are easy to control and the preparation method has strong practicality. The prepared catalyst has a good quality, a low ignition temperature and a high catalytic conversion rate for methane at a relatively low temperature.

Method for preparing noble metal catalyst

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Chengdu, China

Qin Wang