Mesoporous silica-supported chromium catalyst: Characterization and excellent performance in dehydrogenation of propane to propylene with carbon dioxide

被引：72

作者：

Liu, Licheng

Li, Huiquan

Zhang, Yi

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China

[2] Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 03期

基金：

中国国家自然科学基金;

关键词：

propane dehydrogenation; Cr/MSU-x; active sites; carbon dioxide;

D O I：

10.1016/j.catcom.2006.08.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nonordered mesoporous molecular sieves MSU-x supported chromium catalysts (Cr/MSU-x) were prepared and characterized with X-ray diffraction, diffuse reflectance UV-vis, and H-2-temperature programmed reduction techniques. Excellent results in dehydrogenation of propane to propylene with carbon dioxide (CO2) over Cr/MSU-x, 36.8% of propane conversion with 89.1% of propylene selectivity, were obtained. Lower Cr loading results in formation of Cr species with higher oxidation state, whereas higher Cr loading leads to bulk chromium oxide (Cr2O3) crystal on catalyst surface. The active sites of the catalysts and the promoting effect of mesoporous MSU-x as support were also discussed. (c) 2006 Elsevier B.V. All rights reserved.

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收藏

页码：565 / 570

页数：6

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