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

doi:10.1039/C9RA09657D

Methanol to aromatics: isolated zinc phosphate groups on HZSM-5 zeolite enhance BTX selectivity and catalytic stability†

Jian Qiao,

^a Jianqiang Wang,^a Anatoly I. Frenkel,^b Jiawei Teng,^a Xiqiang Chen,^a Jingxian Xiao,^a Tiezhu Zhang,^a Zhendong Wang,^a Zhiqing Yuan^a and Weimin Yang*^a

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* Corresponding authors

^a State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
E-mail: yangwm.sshy@sinopec.com
Fax: +86-21-68462283
Tel: +86-21-68462197

^b Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794, USA

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.

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Methanol to aromatics: isolated zinc phosphate groups on HZSM-5 zeolite enhance BTX selectivity and catalytic stability†

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Methanol to aromatics: isolated zinc phosphate groups on HZSM-5 zeolite enhance BTX selectivity and catalytic stability

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