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

Chem Commun (Camb). 2018 Mar 28;54(25):3146-3149. doi: 10.1039/c7cc09239c. Epub 2018 Mar 12.

Authors

Jiawei Zhong¹, Jingfeng Han², Yingxu Wei², Shutao Xu², Yanli He², Yijun Zheng², Mao Ye², Xinwen Guo³, Chunshan Song⁴, Zhongmin Liu⁵

Affiliations

¹ 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. liuzm@dicp.ac.cn weiyx@dicp.ac.cn and 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 and University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
² 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. liuzm@dicp.ac.cn weiyx@dicp.ac.cn.
³ 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.
⁴ 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 and EMS Energy Institute, Departments of Energy and Mineral Engineering, and of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
⁵ 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. liuzm@dicp.ac.cn weiyx@dicp.ac.cn and State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China.

PMID: 29527611
DOI: 10.1039/c7cc09239c

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.