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Bi2O3 modification of HZSM-5 for methanol-to-propylene conversion: evidence of olefin-based cycle

机译:HZSM-5的Bi 2 O 3 修饰用于甲醇转化为丙烯:基于烯烃的循环的证据

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Bi2O3-modified HZSM-5 catalysts were prepared via a traditional wetness impregnation approach, and used for the methanol-to-propylene conversion reaction. The selectivity for propylene increases significantly with bismuth loading, while that for ethylene shows the opposite trend. However, the Bi2O3/HZSM-5 catalysts have significantly lower capacities for methanol conversion than the parent HZSM-5. The underlying causes are the reduced acid site strength, narrower pore openings, and reduced pore width in Bi2O3/HZSM-5. This work provides insights into the olefin-based cycle operation for methanol-to-olefin reactions using modified HZSM-5 catalysts.
机译:通过传统的方法制备了Bi 2 O 3 改性的HZSM-5催化剂。湿法浸渍法,并用于甲醇向丙烯的转化反应。丙烯的选择性随铋的负载而显着增加,而乙烯的选择性则呈现相反的趋势。但是,Bi 2 O 3 / HZSM-5催化剂的甲醇转化能力明显低于母体HZSM-5。根本原因是Bi 2 O 3 / HZSM-5。这项工作为使用改性的HZSM-5催化剂的甲醇制烯烃反应中基于烯烃的循环操作提供了见识。

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