A diffusion anisotropy descriptor links morphology effects of H-ZSM-5 zeolites to their catalytic cracking performance

• DOI: 10.1038/s42004-021-00543-w
• Publication Date: 2021-07-16T10:03:33Z
• Authors: Xiaoliang Liu; Jing Shi; Guang Yang; Jian Zhou; Chuanming Wang; Jiawei Teng; Yangdong Wang; Zaiku Xie
• Keywords: ZSM-5; Fluid catalytic cracking; Morphology

Zeolite morphology is crucial in determining their catalytic activity, selectivity and stability, but quantitative descriptors of such a effect are challenging to define. Here we introduce descriptor that accounts for the performances H-ZSM-5 zeolite C4 olefin cracking. A series zeolites with similar sheet-like different c-axis lengths were synthesized. We found activity stability improved samples longer c-axis. Combining time-resolved in-situ FT-IR spectroscopy molecular dynamics simulations, show difference performance can be attributed anisotropy intracrystalline diffusive propensity olefins channels. Our offers mechanistic insight design highly effective catalysts