Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (2): 20220532.doi: 10.7503/cjcu20220532

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Mesoporous Silica Supported Highly Dispersed Vanadium Catalyst and Their Catalytic Performance for Selective Oxidation of Ethane

SONG Jiaxin1,2, CUI Jing1, FAN Xiaoqiang1(), KONG Lian1, XIAO Xia1, XIE Zean1, ZHAO Zhen1,2()   

  1. 1.Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China
    2.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China
  • Received:2022-08-12 Online:2023-02-10 Published:2022-09-26
  • Contact: FAN Xiaoqiang, ZHAO Zhen E-mail:fanxiaoqiang1986@126.com;zhaozhen1586@163.com
  • Supported by:
    the National Natural Science Foundation of China(91845201);the Scientific Research Project of Education Office of Liaoning Province,China(LQN202009);the Program for Excellent Talents in Shenyang Normal University,China and the Major Incubation Program of Shenyang Normal University,China(ZD201901)

Abstract:

A series of mesoporous silica supported vanadium catalysts was prepared by incipient-wetness impregnation method using porous silica with high specific surface area as support. And the catalytic performances were tested for the selective oxidation of ethane. The catalysts were characterized by X-ray diffraction(XRD), ultraviolet-visible diffuse reflectance spectrum(UV-Vis DRS) and H2-temperature programmed reduction(H2-TPR). The effects of vanadium loadings on the structure of the catalyst were investigated. It was found that the vanadium species on the surface of the catalysts changed from highly dispersed oligomeric VO x to highly polymerized VO x with the increase of vanadium loading. The highly dispersed vanadium species can improve the selectivity of ethene and acetaldehyde.

Key words: Vanadium based catalyst, Highly dispersed active site, Ethane, Selective oxidation, Ethene and acetaldehyde

CLC Number: 

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