Journal of the Chemical Society - Faraday Transactions p. 3137 - 3142 (1993)
Update date:2022-08-29
Topics:
Dobrovolszky, Maria
Matusek, Karoly
Paal, Zoltan
Tetenyl, Pal
Ageing and the effects of H2S on the activity and selectivity of Co-, Ru-, Pd-, Ir- and Pt-promoted and unpromoted MoOx-Al2O3 catalysts have been studied in relation to decomposition of thiophene.The overall activity increased on unpromoted and Pd-promoted molybdena-alumina, whereas on other catalysts is decreased substantially.The selectivity of production of butane and of fragmented hydrocarbons decreased on all catalysts.The changes in catalytic behaviour were caused by the uptake of H2S added to the system and produced in hydrodesulfurization (HDS) of thiophene.The results indicate no direct correlation between the propensity to interact with H2S and the HDS activity.It follows from data on changes in selectivity and activity, that metal and molybdena act predominantly independently at the early stages of sulfidation.
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