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OALib Journal期刊
ISSN: 2333-9721
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金属氧化物和硅沉积改性zno/sio2/zsm-5的甲醇择形芳构化反应催化研究
, PP. 221-227
Keywords: zsm-5,甲醇,芳构化,择形,px
Abstract:
？采用真空浸渍法对zsm-5分子筛进行硅沉积和负载金属修饰,制备了复合改性的zno/sio2/zsm-5催化剂,并将它应用于甲醇择形芳构化反应中。采用xrd、bet、nh3-tpd、sem、tem等方法对制备的催化剂进行了物化表征。考察硅沉积次数和zno负载量对甲醇芳构化反应(mta)中对二甲苯(px)的选择性和收率的影响。结果表明,两次硅沉积改性并负载2.0%金属zno的zsm-5分子筛具有较高的px收率,在优化的反应温度420℃、反应压力0.2mpa、甲醇空速whsv为1.25h-1下,px收率在28%以上。
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