The enrichment of incorporated Zn-related species and the accommodation of facilitated aromatics impose increased diffusion restriction for bulky hydrocarbons, thus contributing to significant improvements in ethene selectivity and ethene to propene ratio over Zn modified SAPO-34 zeolites.

The mesostructured Zn–Mg–P/ZSM-5 catalyst is efficient in converting methanol to p-xylene and light olefins, with the additional mesoporosity compensating for the activity loss during modification.