| Abstrakt: |
1.The aromatization of ethylene and ethane in the presence of metal-alumina catalysts is a complex, multistep process consisting of a series of consecutive and parallel steps, most of which (dehydrogenation, C5 and C6 dehydrocyclization, and hydrocracking) take place on the metal surface.2.The aromatization of ethylene and ethane, as well as C5-C8 alkanes and cyclanes on zeolites, in contrast to metal-alumina catalysts, passes through a step involving formation of unsaturated low-molecular-weight fragments and their simultaneous oligomerization and aromatization on active sites containing bridging OH groups of the high-silicon zeolites. |
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