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Catalytic conversion of CO2 into propylene carbonate in a continuous fixed bed reactor by immobilized ionic liquids

机译:固定离子液体在连续固定床反应器中将CO2催化转化为碳酸亚丙酯

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In this study, functionalized composite catalysts, namely, ILs (ILX/(ZnBr _(2) ) _(2) ), with hydroxyl, carboxyl and amino groups immobilized on a molecular sieve (MCM-22) support were synthesized with the help of a silane coupling agent, 3-chloropropyltriethoxysilane (CPTES). Cycloaddition of CO _(2) and propylene oxide (PO) was carried out in a fixed bed reactor. The results show that MCM-22-CPTES-[AeMIM][Zn _(2) Br _(5) ] demonstrates the best catalytic properties for this reaction. A high selectivity and yield of propylene carbonate (PC) could be reached at 130?°C under a CO _(2) pressure of 2.0 MPa, with a LHSV of 0.75 h ~(?1) and a molar ratio of CO _(2) /PO of 3?:?1. The yield stabilized at 61.6% after 50 h in the fixed bed reactor.
机译:在这项研究中,借助这种方法合成了功能化的复合催化剂,即固定有分子筛(MCM-22)载体上的羟基,羧基和氨基的ILs(ILX /(ZnBr _(2)__(2))硅烷偶联剂3-氯丙基三乙氧基硅烷(CPTES)的制备。 CO_(2)和环氧丙烷(PO)的环加成反应在固定床反应器中进行。结果表明,MCM-22-CPTES- [AeMIM] [Zn _(2)Br _(5)]证明了该反应的最佳催化性能。在130℃下,在CO _(2)压力为2.0 MPa,LHSV为0.75 h〜(?1)和CO _(摩尔比)的情况下,可以达到较高的选择性和产率的碳酸亚丙酯(PC)。 2)/ PO为3?:?1。在固定床反应器中放置50小时后,收率稳定在61.6%。

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