期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 284, 期 -, 页码 69-77出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2019.04.016
关键词
Propane; Propene; Dehydrogenation; Mesoporous silica; Chromium oxide catalyst
类别
资金
- Science and Technology Commission of Shanghai Municipality [14520502900]
- Ministry of Education of China [PCSIRT_IRT_16R49]
- Shanghai Engineering Research Center of Green Energy Chemical Engineering and International Joint Laboratory on Resource Chemistry (IJLRC)
CrOX-doped mesoporous silica spheres (Cr/MSS-X) were prepared by adding Cr precursors at different preparation stages using sol-gel method (X = 1, 2, 3) and incipient-wetness impregnation method (X = 4), and their catalytic performances of propane oxidative dehydrogenation were evaluated in the presence of CO2. The results indicate that for the Cr/MSS-X catalysts prepared by sol-gel method, Cr adding time significantly influences the Cr dispersion, surface physic-chemical properties and their catalytic performance. Cr/MSS-2 catalysts obtained by adding Cr precursor after the tetraethyl-orthosilicate (TEOS) show the optimal catalytic activity. Although Cr/MSS-1 also shows good CrOX dispersion, part CrOX wrapped in the center of mesoporous silica spheres presents weaker catalytic activity. In this work, the catalyst preparation method is quite facile and has the potential to be utilized for industrial production.
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