Enhanced Catalytic Performance of Cr/MOR for Ethane Dehydrogenation Through Dealumination
Autor: | Yinghong Yue, Hongyao Guo, Changxi Miao, Zi Gao, Weiming Hua |
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Rok vydání: | 2020 |
Předmět: |
Ethylene
biology 010405 organic chemistry Inorganic chemistry Active site General Chemistry 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Silanol Adsorption X-ray photoelectron spectroscopy chemistry biology.protein Dehydrogenation Organometallic chemistry |
Zdroj: | Catalysis Letters. 151:1499-1507 |
ISSN: | 1572-879X 1011-372X |
Popis: | Dehydrogenation of ethane to ethylene assisted by CO2 was investigated over CrOx catalysts supported on MOR zeolites. The catalysts were characterized by XRD, N2 adsorption, SEM, 27Al and 29Si MAS NMR, XPS, DRIFTS, H2-TPR and laser Raman spectroscopy. The catalysts exhibit enhanced activity and stability after MOR dealumination, with an optimal ethane conversion of ~ 38% and ethylene yield of ~ 33%. Characterization results indicate that the improved catalytic performance derives from the increased silanol nests of MOR support created by acidic dealumination, which are in favor of dispersion and stabilization of CrOx species, resulting in more reducible Cr(VI) considered as the active site for dehydrogenation. |
Databáze: | OpenAIRE |
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