Methanol to aromatics: isolated zinc phosphate groups on HZSM-5 zeolite enhance BTX selectivity and catalytic stability
Jian Qiao, Jianqiang Wang, Anatoly I. Frenkel, Jiawei Teng, Xiqiang Chen, Jingxian Xiao, Tiezhu Zhang, Zhendong Wang, Zhiqing Yuan, Weimin Yang
Abstract
HZSM-5 zeolite combined with unique zinc and phosphorus species, yields excellent selectivity (∼85%) to BTX (benzene, toluene, xylenes) in aromatic products. It was found that both zinc and phosphorus species were highly distributed in the pores of the zeolite channel network to form isolated zinc phosphate groups, which directly bond to the surface of zeolite, leading to a strong Lewis acidic center and an optimized surface acidity distribution favorable for BTX formation and the hydrothermal stability of the catalyst.
Topics & Concepts
ZeoliteChemistryTolueneBenzeneZincSelectivityCatalysisInorganic chemistryPhosphateMethanolOrganic chemistryZeolite Catalysis and SynthesisCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions