Abstract
The conversion of methylcyclopentane over Pd/MY zeolites has been studied with catalysts containing Li, Na or K as charge compensating ions M. It is found that in the sequence M = Li, Na, K the activity for ring opening increases, while that for ring enlargement decreases and the benzene/cyclohexane ratio in the ring enlargement product increases. It is proposed that in the sequence M = Li, Na, K the acid strength of zeolite protons is lowered while electron transfer from donor sites to palladium clusters increases from Li to K.
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