Dehydrogenation of Isobutane to Isobutene with Carbon Dioxide over SBA-15-Supported Chromia-Ceria Catalysts

作者：Wei, Chunling; Xue, Fangqi; Miao, Changxi^*; Yue, Yinghong; Yang, Weimin; Hua, Weiming^*; Gao, Zi

来源：Chinese Journal of Chemistry, 2017, 35(10): 1619-1626.

DOI：10.1002/cjoc.201700120

• isobutane dehydrogenation
• carbon dioxide
• chromia-ceria
• SBA-15
• supported catalyst

A series of SBA-15-supported chromia-ceria catalysts with 3% Cr and 1%-5% Ce (3Cr-Ce/SBA) were prepared using an incipient wetness impregnation method. The catalysts were characterized by XRD, N-2 adsorption, SEM, TEM-EDX, Raman spectroscopy, UV-vis spectroscopy, XPS and H-2-TPR, and their catalytic performance for isobutane dehydrogenation with CO2 was tested. The addition of ceria to SBA-15-supported chromia improves the dispersion of chromium species. 3Cr-Ce/SBA catalysts are more active than SBA-15-supported chromia (3Cr/SBA), which is due to a higher concentration of Cr6+ species present on the former catalysts. The 3Cr-3Ce/SBA catalyst shows the highest activity, which gives 35.4% isobutane conversion and 89.6% isobutene selectivity at 570 degrees C after 10min of the reaction.

• 出版日期2017-10
• 单位中国石油化工股份有限公司上海石油化工研究院; 复旦大学