In situ recrystallization of mesoporous carbon-silica composite for the synthesis of hierarchically porous zeolites

Abstract

Hierarchically porous ZSM-5 was prepared by utilizing a two-step crystallization procedure with carbon-silica composites as precursors. The hierarchically porous zeolites obtained a regular mesoporous structure with aluminum incorporated into the carbon-silica composite frameworks. The carbon-silica composite zeolites were characterized by XRD, TEM, SEM, and nitrogen adsorption/desorption. As-prepared hierarchical zeolites were used in the 1,3,5-triisopropylbenzene (TIPB) cracking reaction and exhibited significantly high TIPB conversion, while the accessibility factors were also determined.