Cavity-controlled methanol conversion over zeolite catalysts  

作　　者：Wenna Zhang Shanfan Lin Yingxu Wei Peng Tian Mao Ye Zhongmin Liu 

机构地区：[1]National Engineering Research Center of Lower-Carbon Catalysis Technology,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,China [2]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Energy College,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《National Science Review》2023年第9期66-85,共20页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(22002157,21991092,21991091,21991090,22288101 and 22241801);the National Key R&D Program of China(2021YFA1502600);the Liaoning Provincial Natural Science Foundation of China(2022-BS-019).

摘　　要：The successful development and application in industry of methanol-to-olefins(MTO)process brought about an innovative and efficient route for olefin production via non-petrochemical resources and also attracted attention of C1 chemistry and zeolite catalysis.Molecular sieve catalysts with diversified microenvironments embedding unique channel/cavity structure and acid properties,exhibit demonstrable features and advantages in the shape-selective catalysis of MTO.Especially,shape-selective catalysis over 8-MR and cavity-type zeolites with acidic supercage environment and narrow pore opening manifested special host–guest interaction between the zeolite catalyst and guest reactants,intermediates and products.This caused great differences in product distribution,catalyst deactivation and molecular diffusion,revealing the cavity-controlled methanol conversion over 8-MR and cavity-type zeolite catalyst.Furthermore,the dynamic and complicated cross-talk behaviors of catalyst material(coke)-reaction-diffusion over these types of zeolites determines the catalytic performance of the methanol conversion.In this review,we shed light on the cavity-controlled principle in the MTO reaction including cavity-controlled active intermediates formation,cavity-controlled reaction routes with the involvement of these intermediates in the complex reaction network,cavity-controlled catalyst deactivation and cavity-controlled diffusion.All these were exhibited by the MTO reaction performances and product selectivity over 8-MR and cavity-type zeolite catalysts.Advanced strategies inspired by the cavity-controlled principle were developed,providing great promise for the optimization and precise control of MTO process.

关 键 词：methanol-to-olefins cavity-controlled principle reaction intermediates and routes deactivation and diffusion shape-selective catalysis 

分 类 号：TQ223.121[化学工程—有机化工] TQ426