钡改性脱铝丝光沸石分子筛在甲醇制烯烃中的催化反应性能研究  

The performance study of catalytic reaction of barium-modified dealuminated mordenite molecular sieve from methanol to olefins

作　　者：孙焕红[1] 李霞[1] SUN Huan-hong(Ningxia Vovational 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,宁夏银川750021

出　　处：《煤炭加工与综合利用》2020年第12期52-55,I0001,共5页Coal Processing & Comprehensive Utilization

基　　金：高等职业教育创新发展行动计划宁夏现代煤化工应用技术协同创新中心建设项目(教职成函〔2019〕10号)。

摘　　要：采用钡盐浸渍法制备了负载不同含量BaO的脱铝丝光沸石分子筛(DHM),通过XRD和NH 3-TPD表征了其物相和酸性质;结果表明:改性负载前后,丝光沸石分子筛骨架没有发生变化;BaO高度分散在DHM上;酸洗脱铝后的丝光沸石及BaO改性后的DHM分子筛酸量明显降低;BaO在分子筛上的负载量为2%时,其丙烯及C 2~C 4烯烃的选择性达最大值,丙烯选择性约为23.3%,C 2~C 4烯烃选择性为47.3%;与改性前相比,适量BaO修饰的DHM在MTO反应中对丙烯及低碳烯烃选择性的提高有显著效果。The Barium salt impregnation method is adopted to make the dealuminated mordenite molecular sieve(DHM)loaded with different content of BaO and characterize its phase and acid properties by XRD and NH3-TPD;the result shows:mordenite zeolite framework has not changed before and after modified load;BaO is highly dispersed on DHM;it is significantly reduced of Mordenite after acid eluting aluminum and acid content of DHM molecular sieve modified by BaO;when the amount of BaO on the molecular sieve is 2%,its selectivity of propylene and C 2~C 4 olefins reaches the maximum,propylene selectivity is approximately 23.3%,and C 2~C 4 olefin selectivity is 47.3%;DHM modified with appropriate amount of BaO has the significant effect on the improved selectivity of propylene and light olefins in the MTO reaction compared with before modification.

关 键 词：催化剂 改性 丝光沸石 甲醇制烯烃 

分 类 号：TQ426.94[化学工程]