Cobaltous oxide supported on MFI zeolite as an efficient ethane dehydrogenation catalyst
Autor: | Weiming Hua, Zi Gao, Changxi Miao, Hongyao Guo, Yinghong Yue |
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Rok vydání: | 2021 |
Předmět: |
inorganic chemicals
Ethylene Inorganic chemistry Oxide chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption chemistry Mechanics of Materials General Materials Science Dehydrogenation 0210 nano-technology Selectivity Zeolite Cobalt |
Zdroj: | Microporous and Mesoporous Materials. 312:110791 |
ISSN: | 1387-1811 |
Popis: | Cobalt catalysts supported on submicron ZSM-5 with different Si/Al ratio have been prepared and characterized by XRD, N2 adsorption, SEM , MAS NMR, XPS, UV–vis, Py-IR and H2-TPR. They are effective for direct dehydrogenation of ethane to ethylene. HZSM-5 supported catalyst is far more active than NaZSM-5 and SBA-15 supported ones with same Co content. The optimal catalyst exhibited an ethane conversion of 54.5% with 87.8% selectivity to ethylene. The dispersed cobaltous species play a vital role in dehydrogenation, which were formed by in situ reduction of Co3O4 and CoOx species during the initial reaction period. Higher amount of cobaltous species can be obtained on the support having stronger interaction with the loaded Co species, resulting in an enhancement in catalytic activity. The strong interaction can also stabilize the cobaltous species, preventing the over-reduction of cobaltous species to metallic Co during the reaction which leads to deactivation. |
Databáze: | OpenAIRE |
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