Probing the electronic state of nickel-molybdenum sulphide catalysts using ortho-xylene hydrogenation

被引:0
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作者
Fischer, L [1 ]
Harlé, V [1 ]
Kasztelan, S [1 ]
机构
[1] Inst Francais Petr, Kinet & Catalysis Div, F-92852 Rueil Malmaison, France
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中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Ortho-xylene was hydrogenated at 300 degrees C under 60 bar total pressure over sulphided Ni, Mo and NiMo alumina catalysts. Among the 1,2-dimethylcyclohexanes formed, the ratio of the stereoisomers cis/trans was found to be sensitive to the electronic state of the catalysts' active sites. Applied to a series of NiMo catalysts containing increasing amounts of nickel, the reaction suggests a successive decoration of MoS(2) slabs with the promoter. Hydrogenation of ortho-xylene is a powerful new method for probing electronic effects specifically on active sites of sulphide catalysts under typical hydrotreating conditions.
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页码:261 / 268
页数:8
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