Origin of Morphology Change and Effect of Crystallization Time and Si/Al Ratio during Synthesis of Zeolite ZSM?5

Hydrothermal synthesis of ZSM-5 is an often applied but incompletely understood procedure. In comparison to current research efforts that aim produce complex micro-mesoporous catalysts for the conversion biogenic and bulky hydrocarbons, this work focuses on dependency between Si/Al ratio zeolite morphology microporous understand control process. two series time dependent crystallization, kinetics were analyzed at 20 100 optimize crystallization time. Subsequently, zeolites with different obtained characterized. The results show a transition from slow dissolution-recrystallization process fast solid-state-transformation increasing ratio. This followed by switching clusters small agglomerates bigger spherical particles. Respective acid site density determine local residence time, hydride transfer behavior finally selectivity towards aromatics higher hydrocarbons during methanol conversion. background should provide even more syntheses porous catalysts.