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Dehydrogenation of ethane to ethylene in the presence of CO2 was investigated over CrOx 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...
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