Increasing the selectivity to ethylene in the MTO reaction by enhancing diffusion limitation in the shell layer of SAPO-34 catalyst

Jiawei Zhong; Jingfeng Han; Yingxu Wei; Shutao Xu; Yanli He; Yijun Zheng; Mao Ye; Xinwen Guo; Chunshan Song; Zhongmin Liu

doi:10.1039/C7CC09239C

Increasing the selectivity to ethylene in the MTO reaction by enhancing diffusion limitation in the shell layer of SAPO-34 catalyst†

Jiawei Zhong,

‡^abc Jingfeng Han,‡^a Yingxu Wei,*^a Shutao Xu,^a Yanli He,^a Yijun Zheng,^a Mao Ye,^a Xinwen Guo,

^b Chunshan Song^bd and Zhongmin Liu

*^ae

Author affiliations

* Corresponding authors

^a National Engineering Laboratory for Methanol to Olefins, State Energy Low Carbon Catalysis and Engineering R&D Center, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
E-mail: liuzm@dicp.ac.cn, weiyx@dicp.ac.cn
Fax: +86 411 84691570
Tel: +86 411 84379335

^b State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China

^c University of Chinese Academy of Sciences, Beijing 100049, P. R. China

^d EMS Energy Institute, Departments of Energy and Mineral Engineering, and of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA

^e State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China

Abstract

The zinc cation accommodation in the cavities of the shell layer and the facilitated aromatic formation over the zinc cation modified SAPO-34 with a core–shell like structure introduce extra diffusion limitation for bulky hydrocarbons, which increases the selectivity to ethylene and the ethylene to propylene ratio at the initial stage of the MTO reaction.

Chemical Communications

Increasing the selectivity to ethylene in the MTO reaction by enhancing diffusion limitation in the shell layer of SAPO-34 catalyst†

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Increasing the selectivity to ethylene in the MTO reaction by enhancing diffusion limitation in the shell layer of SAPO-34 catalyst

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