公开(公告)号：US20210322956A1

公开(公告)日：2021-10-21

申请号：US17260559

申请日：2019-11-21

Applicant: Tianjin University

Inventor： Jinlong GONG ,  Sai CHEN ,  Liang ZENG

IPC: B01J23/60 ,  B01J21/08 ,  B01J21/04 ,  B01J37/02 ,  B01J37/18 ,  B01J37/08 ,  B01J8/02 ,  B01J35/02 ,  C07C5/333

Abstract: The present application discloses a supported PtZn intermetallic alloy catalyst, a method for preparing the same and application thereof. The catalyst uses SiO2 as a support and Zn as a promoter, and a small amount of active component Pt is supported; the weight percentage of Pt is 0.025%-1%, and the weight percentage of Zn is 0.025%-1.7%, a co-impregnation method is adopted in preparation, the SiO2 support is impregnated in aqueous solution of chloroplatinic acid and zinc nitrate, and then drying and high-temperature reduction are performed to obtain a PtZn/SiO2 catalyst. The catalyst has the advantages of high activity, high stability, low price and low toxicity. The catalyst provided by the present application is applicable to preparation of alkene through short-chain alkane dehydrogenation, in particular to preparation of propylene through propane dehydrogenation in a hydrogen atmosphere. Under high-temperature conditions, the dehydrogenation activity is very high, the propylene selectivity can reach more than 90%, the stability is good, and the amount of used Pt is small, the utilization rate is high, and it is cheaper than industrial Pt series catalysts.

公开(公告)号：US20220088573A1

公开(公告)日：2022-03-24

申请号：US17542215

申请日：2021-12-03

Applicant: TIANJIN UNIVERSITY

Inventor： Jinlong GONG ,  Yiyi XU ,  Sai CHEN ,  Chunlei PEI

IPC: B01J23/06 ,  B01J21/04 ,  B01J35/00 ,  B01J37/02 ,  B01J37/08 ,  C07C5/32

Abstract: The present invention belongs to the technical field of supported catalysts, and discloses a supported core-shell structured ZnO catalyst, and a preparation method and use thereof. With Al2O3 as a support and ZnO as active sites, the catalyst is characteristic of a NiZn@ZnO core-shell structure, which consists of a NiZn alloy core and a ZnO shell The preparation method comprises firstly dissolving Ni(NO3)3.6H2O and Zn(NO3)2.6H2O in deionized water; then impregnating Al2O3 with the solution described above, followed by uniform ultrasonic dispersion and complete drying; and finally the obtained solid is calcinated and reduced to obtain the target catalyst, which exhibits high activity, selectivity and stability. The catalyst can be used for the dehydrogenation of light alkanes to alkenes, especially in dehydrogenation of propane to propylene.