Formaldehyde intermediate participating in the conversion of methanol to aromatics over zinc modified H-ZSM-5  

作　　者：Youming Ni Wenliang Zhu Zhongmin Liu 

机构地区：[1]National Engineering Laboratory for Methanol to Olefins,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China [2]Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China

出　　处：《Journal of Energy Chemistry》2021年第3期174-178,共5页能源化学（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(Grant No.21978285,21991093,21991090);the“Transformational Technologies for Clean Energy and Demonstration”,Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA21030100)。

摘　　要：Metal-modified H-ZSM-5 has a high selectivity of aromatics in methanol to aromatics(MTA)reaction,which is often attributed to the metal promoting the aromatization of intermediate olefins.However,the effect of methanol dehydrogenation on aromatics formation over these catalysts is rarely studied.Here,we report that HCHO,which is formed by methanol dehydrogenation over Zn/H-ZSM-5 prepared by Zn impregnation,can participate in the synthesis of aromatics.Methanol conversion can produce more aromatics than olefins(propylene or ethylene)conversion over Zn/H-ZSM-5,indicating the conventional MTA pathway including methanol-to-olefins and olefins-to-aromatics is not complete.Moreover,an MTA mechanism including the conventional pathway and the methanol and HCHO coupling pathway is systematically proposed.

关 键 词：METHANOL FORMALDEHYDE AROMATICS Zn H-ZSM-5 

分 类 号：TQ241[化学工程—有机化工] TQ426