以聚丙烯腈(PAN)中空纤维膜为支撑底膜,聚乙烯醇(PVA)为渗透汽化(PV)层,全氟磺酸树脂(PFSA)-聚乙烯醇(PVA) -纳米材料(SiO2、Al2O3和TiO2)为催化层,制备了具有催化和PV双功能的PFSA- PVA- SiO2 (Al2O3和TiO2 )/PVA/ PAN中空纤维复合膜.以乙酸-乙醇酯化反应塔顶粗酯考察其分离性能,以乙酸-乙醇酯化反应考察其催化性能,同时还考察了分离膜作为规整填料的精馏性能.实验结果表明:催化层和PV层能紧密粘结在底膜上,具有良好的PV性能,其渗透通量约170 g/(m2·h),对乙醇的选择性高于27,且无乙酸乙酯透过,以及具有良好的催化性能；当复合膜用作规整精馏填料时,与传统精馏填料相比,能显著降低HTU(小于10 cm)；与文献中的中空纤维膜规整填料相比,气液在膜的管层、壳层分开与否对HTU影响不大.
参考文献
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