期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 386, 期 -, 页码 5-13出版社
ELSEVIER
DOI: 10.1016/j.molcata.2014.02.003
关键词
Diluent gases; CH4 balanced He; SrTiO3; Cu-Ag; Ethylene epoxidation
资金
- Royal Golden Jubilee Ph.D. Program (RGJ-Industry)
- Thailand Research Fund
- PTT Global Chemical Public Co. Ltd.
- Sustainable Petroleum and Petrochemicals Research
- Center of Excellence on Petrochemical and Materials Technology
- Chulalongkorn University (Thailand)
- Ratchadaphiseksomphot Endowment Fund
- Transportation Energy Center, Department of Chemical Engineering, University of Michigan (USA)
The influence of different diluent gases (He, Ar, N-2, CH4, and CH4 balanced with He) on the epoxidation of ethylene was comparatively studied over three different catalysts, including a commercial 14.86 wt.% Ag/alpha-Al2O3, a bimetallic 1.41 wt.% Cu-17.16 wt.% Ag/SrTiO3, and a 0.32 wt.% Sn-promoted on 1.39 wt.% Cu-17.16 wt.% Ag/SrTiO3 catalyst. The best diluent gas for ethylene epoxidation was CH4 balanced with He over all catalysts. CH4 enhanced C2H4 conversion while He provided both high EO selectivity and yield. Thus, the 35% CH4 balanced with 53% He diluent gas provided the highest synergistic effect toward the ethylene epoxidation reaction, while also leading to the lowest level of coke formation. (C) 2014 Elsevier B.V. All rights reserved.
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