Optimal Aluminum-Assisted Mesoporosity Development in MFI Zeolites by Desilication

Abstract

Tetrahedrally coordinated aluminum in MFI zeolite frameworks controls the mechanism of intracrystalline mesopore formation by desilication in alkaline medium. The optimal molar Si/Al ratio in the range of 25−50 enables a controlled mesoporosity development with preserved crystalline and acidic properties, potentially leading to a more efficient zeolite utilization by improved diffusion characteristics.