Isolated zinc in mordenite stabilizing carbonylation of dimethyl ether to methyl acetate

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英文篇名：Isolated zinc in mordenite stabilizing carbonylation of dimethyl ether to methyl acetate 作者：Zhitao ; Zhang ; Na ; Zhao ; Kui ; Ma ; Qingpeng ; Cheng ; Jing ; Zhang ; Lirong ; Zheng ; Ye ; Tian ; Xingang ; Li 英文作者：Zhitao Zhang;Na Zhao;Kui Ma;Qingpeng Cheng;Jing Zhang;Lirong Zheng;Ye Tian;Xingang Li;Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Engineering,School of Chemical Engineering and Technology, Tianjin University;Beijing Synchrotron Radiation Facility,Institute of High Energy Physics, Chinese Academy of Sciences; 英文关键词：Zinc;;Mordenite;;Dimethyl ether;;Carbonylation;;Acidic property 中文刊名：FXKB 英文刊名：中国化学快报(英文版) 机构：Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Engineering,School of Chemical Engineering and Technology, Tianjin University;Beijing Synchrotron Radiation Facility,Institute of High Energy Physics, Chinese Academy of Sciences; 出版日期：2019-02-15 出版单位：Chinese Chemical Letters 年：2019 期：v.30 基金：supported by the National Natural Science Foundation of China (Nos. 21476159, 21676182);; the 973 Program (No.2014CB932403);; authors are also grateful to the Program of Introducing Talents of Disciplines to China Universities(No. B06006) 语种：英文; 页：FXKB201902058 页数：4 CN：02 ISSN：11-2710/O6 分类号：263-266

摘要

Herein, we prepared a series of H-Zn-mordenite (H-Zn-MOR) catalysts by adding zinc source into the initial sols during the synthesis of mordenite (MOR). The results indicated that isolated Zn ions were highly dispersed in the catalysts. The addition of zinc led to the increase of Si/Al in the framework of MOR,the change of the distribution of acid sites and the change of acid strength. We investigated the catalytic performance of the H-Zn-MOR catalysts and the HMOR catalysts for carbonylation of dimethyl ether to methyl acetate. The addition of zinc improved the catalytic performance and made the drop of the conversion over the Zn-0.003 and Zn-0.005 catalysts to be about the half of that over the HMOR catalyst.We attributed it to the change of the acid properties, which further change the rate of coke deposition.
        Herein, we prepared a series of H-Zn-mordenite (H-Zn-MOR) catalysts by adding zinc source into the initial sols during the synthesis of mordenite (MOR). The results indicated that isolated Zn ions were highly dispersed in the catalysts. The addition of zinc led to the increase of Si/Al in the framework of MOR,the change of the distribution of acid sites and the change of acid strength. We investigated the catalytic performance of the H-Zn-MOR catalysts and the HMOR catalysts for carbonylation of dimethyl ether to methyl acetate. The addition of zinc improved the catalytic performance and made the drop of the conversion over the Zn-0.003 and Zn-0.005 catalysts to be about the half of that over the HMOR catalyst.We attributed it to the change of the acid properties, which further change the rate of coke deposition.

引文

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