水热处理对HM-HZSM-5混合分子筛甲醇制丙烯催化性能的影响  

Effect of hydrothermal treatment on catalytic performance of HM-HZSM-5 mixed molecular zeolites for MTP reaction

作　　者：孙焕红[1] 李霞[1] SUN Huan-hong;LI Xia(Department of Energy and Chemistry Engineering,Ningxia Vocational Technical College of Industry and Commerce,Yinchuan,Ningxia 750021,China)

机构地区：[1]宁夏工商职业技术学院能源化工学院,宁夏银川750021

出　　处：《煤炭加工与综合利用》2022年第12期69-73,共5页Coal Processing & Comprehensive Utilization

基　　金：2020年度宁夏高等学校科学研究项目“碱土金属修饰的CuFe2O4复合载氧体煤/生物质化学链气化制氢特性研究”(宁教高办[2020]23号)。

摘　　要：采用水热处理晶化方法制备了氢型丝光沸石-氢型ZSM-5机械混合分子筛(HM-HZSM-5混合分子筛),并考察了不同配比、不同晶化时间下混合分子筛的甲醇制丙烯(MTP)催化性能。结果表明,以HM/HZSM-5=9∶1,晶化72 h的机械混合分子筛的催化效果最优,甲醇转化率为100%、C_(3)^(=)选择性为31.79%,C_(2)^(=)~C_(4)^(=)选择性为63.69%;水热处理后混合分子筛BET比表面积降低,孔分布发生了改变,提高了混合分子筛择形性,对MTP反应表现出较好的催化活性。Mechanical mixed zeolites of HM+HZSM-5 was prepared by hydro-thermal way.Effects of different proportion and Crystallized time and methanol to propylene(MTP)catalytic activity of the mixed zeolites were tested.Experimental results showed that the catalytic activity of mixed zeolites(HM/HZSM-5=9∶1,Crystallized 72h)were best.The purpose products of propylene and oleffins(C_(2)^(=)~C_(4)^(=))selectivity reached to 31.79%and 63.69%respectivily with methanol conversion at 100%.After hydrothermal treatment,BET specific surface area of the mixed molecular sieve decreased,pore distribution changed,The shape selection of the mixed molecular sieve was improved and it showed good catalytic activity for MTP reaction.

关 键 词：HM-HZSM-5 机械混合 水热处理 晶化处理 MTP活性 

分 类 号：TQ529[化学工程—煤化学工程]