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Citation: WANG Rui-yu, BAI Si-yu, ZHENG Chuan-yue, LI Zhong. Effect of oxidative/reductive pretreatment on the performance of Cu2O/AC catalyst for oxidative carbonylation of methnol[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(10): 1245-1251. shu

Effect of oxidative/reductive pretreatment on the performance of Cu2O/AC catalyst for oxidative carbonylation of methnol

  • 1.

    1. Key Laboratory of Coal-based CO2 Capture and Geological Storage of Jiangsu province, China University of Mining and Technology, Xuzhou 221006, China;

  • Corresponding author: LI Zhong, 
  • Received Date: 24 March 2015
    Available Online: 9 June 2015

    Fund Project: 国家自然科学基金(21506249) (21506249)江苏省博士后基金(1401096c) (1401096c)中央高校基本科研业务费(中国矿业大学,2014QNA19)资助项目 (中国矿业大学,2014QNA19)

  • The Cu2O/AC catalyst prepared by pyrolysis of copper acetate supported on activatede carbon was pretreated under oxidative (O2/N2) or reductive (H2/N2 and CO/N2) atmospheres. The oxidation/reduction of Cu2O was completed through pretreatment at 350 ℃ for 4 h, the Cu2O in catalyst could be completely oxidized to CuO by oxidative atmosphere, or reduced to metallic copper by reductive atmosphere. The catalyst activities were evaluated in a continuous fixed-bed tubular micro reactor under atmospheric pressure at 140 ℃. The catalyst pretreated by CO/N2 had good Cu0 dispersion on its surface and exhibited the highest activity. The space-time yield and selectivity of DMC reached 261.9 mg/(g·h) and 74.7%, respectively. After 58 h reaction, the valence state of copper species and the catalytic activity of catalysts pretreated by reductive atmosphere were found to be close to that of the Cu2O/AC catalyst. Comparing the catalytic performance, the characterization of surface and bulk copper species before and after reaction, it was obvious that metallic copper exhibited a high initial activity, while Cu2O was stable in catalytic activity and valence state, and CuO was low in activity.
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