α -MoO_(3)改性MCM-22沸石应用于甲烷无氧芳构化反应  

Application ofα-MoO_(3) Modified MCM-22 Zeolite in Methane Dehydro-Aromatization Reaction

作　　者：李阳阳 胡静 吴淑杰[2] 王晓晖[1] 宋亚娇 刘景海[1] 刘景林[1] Li Yangyang;Hu Jing;Wu Shujie;Wang Xiaohui;Song Yajiao;Liu Jinghai;Liu Jinglin(National Demonstration Center for Experimental Chemistry Education,Inner Mongolia Key Laboratory of Carbon Nanomaterials,College of Chemistry and Materials Science,Inner Mongolia Minzu University,Tongliao 028043,China;College of Chemistry,Jilin University,Changchun 130023,China)

机构地区：[1]内蒙古民族大学化学与材料学院化学国家级实验教学示范中心内蒙古自治区纳米碳材料重点实验室,内蒙古通辽028043 [2]吉林大学化学学院,吉林长春130023

出　　处：《山东化工》2022年第11期31-34,共4页Shandong Chemical Industry

基　　金：国家自然科学基金项目(21961024,21362020);内蒙古自然科学基金项目(2017BS0205,2018BS02005);内蒙古民族大学博士启动基金项目(BS379);内蒙古自治区高等学校科学研究项目(NJZY21418)。

摘　　要：采用简易的固相研磨法制备α-MoO_(3)改性的MCM-22沸石并用于催化甲烷无氧芳构化反应。通过XRD、SEM、BET和NH_(3)-TPD对催化剂的结构和酸性进行分析。结果表明α-MoO_(3)在高温条件下易于升华迁移到沸石孔道中与Bronsted酸位点结合生成较多的有效活性中心,同时降低沸石的酸性。催化甲烷的无氧芳构化反应时,甲烷转化率为12.4%,苯收率为7.6%,该催化剂还具有很好的稳定性。In this paper,α-MoO_(3) modified MCM-22 zeolite prepared by a simple solid-phase grinding method was used to catalyze the methane dehydro-aromatization reaction.The structure and acidity of the catalysts were analyzed by XRD,SEM,BET and NH_(3)-TPD.The results show thatα-MoO_(3) can easily migrate to zeolite pores and bind to Br nsted acid sites at high temperature,which not only generates more active sites but also reduces the acidity of zeolite.Catalytic experiments show that Mo(α)-HMCM-22 has good catalytic performance,methane conversion is 12.4%,benzene yield is 7.6%.In addition,Mo(α)-HMCM-22 catalyst maintained good stability.

关 键 词：α-MoO_(3) MCM-22沸石 甲烷无氧芳构化 

分 类 号：O643.36[理学—物理化学]