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- W2561880396 abstract "Abstract Dehydrogenation of ethane to ethylene in the presence of CO 2 was investigated over CrO x catalysts supported on ZSM-5 with different crystallite sizes, including nanometer, submicron and micrometer. These catalysts behave differently in the dehydrogenation reaction, but no relationship between the activity and crystallite size of ZSM-5 was found. XPS, UV-vis, laser Raman and HR-TEM studies show that the better activity comes from better CrO x dispersion on ZSM-5 surface. The characterization results of ZSM-5 supports by N 2 adsorption, SEM, XRD, XRF, 27 Al and 29 Si MAS NMR reveal that the difference of the dispersion is associated with their surface properties, not with the textural ones. Silanols on the surface play an important role in dispersing the CrO x active species. Silanol nests are more helpful in efficient CrO x dispersion than terminal silanols, which subsequently result in higher dehydrogenation activity." @default.
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- W2561880396 date "2017-02-01" @default.
- W2561880396 modified "2023-09-22" @default.
- W2561880396 title "Cr/ZSM-5 for ethane dehydrogenation: Enhanced catalytic activity through surface silanol" @default.
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- W2561880396 doi "https://doi.org/10.1016/j.apcata.2016.12.025" @default.
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