Abstract
Isomerization and cracking of 2-methylpentane were studied on alumina supported molybdenum oxide catalysts. Before all catalytic experiments, the catalyst was reduced in situ under hydrogen flow. The pretreatment conditions appeared to affect strongly the properties of the catalyst. By lowering the heating rate used to reach the reduction temperature (from 150°C/15 min to 50°C/15 min) or by increasing the reduction duration (from 2 h to 6 h), the catalytic properties could be altered from a high level of isomerization activity to a high level of cracking activity. The nature of the two kinds of catalytically active sites is discussed.
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