Synthesis of mordenite by solvent-free method and its application in the dimethyl ether carbonylation reaction  

作　　者：Yinghui Liu Shaoduo Liu Xiaosheng Wang Hongjing Wang Ranjia Li Changchun Yu Chunming Xu Yuxiang Liu Zhengqiu Xie Yongqiang Wang Pan Tang 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,College of New Energy and Materials,China University of Petroleum-Beijing,Beijing 102249,China [2]Synfuels China Technology Co.,Ltd,Beijing 101400,China [3]College of Chemical Engineering,Qingdao University of Science&Technology,Qingdao 266042,China [4]Yueyang Jucheng Chemical Co.,Ltd,Yueyang 414009,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第2期216-223,共8页中国化学工程学报（英文版）

基　　金：supported by China National Natural Science Foundation(22008260,21908123)。

摘　　要：Mordenite with different Si/Al ratios were synthesized by solvent-free method and used for dimethyl ether(DME)carbonylation reaction.The influence of Si/Al ratio in the feedstock on the structure,porosity and acid sites were systematically investigated.The characterization results showed that with the increase of Si/Al ratio in the feedstock,part of silicon species fail to enter the skeleton and the specific surface area and pore volume of the samples decreased.The amount of weak acid and medium strong acid decreased alongside with the increasing Si/Al ratio,and the amount of strong acid slightly increased.The Al atoms preferentially enter the strong acid sites in the 8 member ring(MR)channel during the crystallization process.The high Si/Al ratio sample had more acid sites located in the 8 MR channel,leading to more active sites for carbonylation reaction and higher catalytic performance.Appropriately increasing the Si/Al ratio was beneficial for the improvement of carbonylation reaction activity over the mordenite(MOR)catalyst.

关 键 词：CARBONYLATION Dimethyl ether SOLVENT-FREE ZEOLITE Synthesis CATALYSIS 

分 类 号：O621.251[理学—有机化学] O643.36[理学—化学]