Mesoporous silica-supported chromium catalyst: Characterization and excellent performance in dehydrogenation of propane to propylene with carbon dioxide |
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| Affiliation: | 1. Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, Beijing 100080, PR China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;2. Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China;1. Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;2. Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia;1. Chemical Engineering Department, King Saud University, Riyadh 11451, Saudi Arabia;2. King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia;3. Central Metallurgical Research and Development Institute, CMRDI, Helwan 11421, Cairo, Egypt;1. Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia;2. Ivanovo State University, Nanomaterials Research Institute, Ermak str., 37/7, 153025 Ivanovo, Russia;3. N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky prosp. 47, 119991 Moscow, Russia |
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| Abstract: | 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 H2-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. |
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