Phosphorus-/Tungsten-Doped ZSM-5 Composites with a Hierarchical Structure for Efficient Production of 2,6-Diisopropylnaphthalene

Abstract

Zeolite frameworks provide multiple templates in the fabrication of versatile metal materials, but most possess only micropores, limiting the accessibility of active sites. Herein, we report the construction of phosphorus-/tungsten-doped ZSM-5 composites with a hierarchical micro−mesoporous structure (PW-ZSM-5-AL). When used in the alkylation reaction, the hierarchical skeleton could effectively promote mass transfer and facilitate the accessibility of embedded active sites. This unique material greatly boosts the catalytic performance in the selective alkylation of naphthalene to isopropylnaphthalene and 2,6-diisopropylnaphthalene, making it much superior to other zeolites without the hierarchically porous structure.