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n-Butene was isomerized to isobutene over fresh and used ferrierite catalysts. Activity and selectivity for skeletal isomerization and biproduct formation were measured and changes following extended use were related to changes in ferrierite′s aluminum distribution. In its fresh form, ferrierite exhibited high activity for n-butene conversion and high selectivity for non-C 4 products with...
Effects of zeolite pore structure on skeletal isomerization of 1-butenes are investigated. Three 10-member ring zeolites, ferrierite, ZSM-23, and ZSM-5, are studied and compared. Results show that ferrierite, with intersecting 10-MR and 8-MR channels, has better isomerization activity than ZSM-23, with monodirectional 10-MR channels, ZSM-5 with two intersecting 10-MR channels is not a selective isomerization...