Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (10): 20220175.doi: 10.7503/cjcu20220175

• Article: Inorganic Chemistry • Previous Articles     Next Articles

Preparation of Au-CeZr/FAU Catalytic Membranes for Preferential Oxidation of CO in H2-rich Stream

WEI Lina, PENG Li, ZHU Feng, GU Pengfei, GU Xuehong()   

  1. State Key Laboratory of Materials?Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China
  • Received:2022-03-22 Online:2022-10-10 Published:2022-04-15
  • Contact: GU Xuehong E-mail:xhgu@njtech.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22035002);Jiangsu Provincial Policy Guidance Project(International/ Hongkong, Macau and Taiwan Cooperation of Science and Technology): One-Belt-One-Road Innovative Program, China(BZ2020065)

Abstract:

A series of CeZr/FAU zeolite membranes with different Ce/Zr doping ratios was prepared by impregnation method, and further loaded with nano-gold to prepare Au-CeZr/FAU catalytic membranes. The obtained membranes were well characterized, and their catalytic performances toward the preferential oxidation of CO in H2-rich gases were studied. The H2-TPR analysis showed that the Au-Ce1Zr1/FAU membrane with Ce/Zr doping ratio of 1∶1 had the best redox ability, which benefited the dispersion and reduction of Au nanoparticles. The O2-TPD analysis suggested that this membrane also possessed more active oxygen species. As a result, the Au-Ce1Zr1/FAU catalytic membrane exhibited the best catalytic activity for CO-PROX reaction with 100% CO conversion and 100% O2 selectivity at low temperature of 60 ℃ as well as high stability for 10 thermal cycling tests.

Key words: CO preferential oxidation, Zeolite, Catalytic membrane

CLC Number: 

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