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- W2065789712 abstract "A Safaniya asphaltene was deposited on various sulphided catalysts: a typical CoMoA1203, MoA1203, CoA1203 and A1203. Various methods of deposition were investigated: deposition at 30 kg cm−2 and 200–300°C from a solution of asphaltene in xylene, simple physical mixture or pore volume impregnation at room temperature by a solution in xylene. The changes of activity were measured at 300 and 400°C, 30 kg cm−2, with a mixture of cyclohexane, cyclohexene and thiophene. Deposition modifies all catalytic activities, namely hydrogenation- dehydrogenation, desulphurization and isomerization of cyclohexene to methyl- cyclopentene. The results must be explained by both pore blockage and surface poisoning, especially poisoning of acid centres. Besides, a small hydrogenating activity of the products of asphaltene decomposition, presumably vanadium and/or nickel sulphide, is detected." @default.
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- W2065789712 date "1984-01-01" @default.
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- W2065789712 title "Influence of asphaltene deposition on catalytic activity of cobalt molybdenum on alumina catalysts" @default.
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- W2065789712 doi "https://doi.org/10.1016/s0166-9834(00)81886-2" @default.
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