Pervaporation separation of toluene/alcohol mixtures using silicalite zeolite embedded chitosan mixed matrix membranes
Pervaporation separation of toluene/alcohol mixtures using silicalite zeolite embedded chitosan mixed matrix membranes
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DOI：
10.1016/j.seppur.2008.01.013
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发表时间：
2008-08
影响因子：
8.6
通讯作者：
M. Patil;T. Aminabhavi
中科院分区：
文献类型：
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作者：
M. Patil;T. Aminabhavi
以壳聚糖为膜材料，分别以5%和10%的硅沸石颗粒为填料，制备了壳聚糖混合基质膜相对于脱乙酰壳多糖聚合物的重量，以改善它们的渗透蒸发（PV）分离特性，超过用于甲苯/甲醇和甲苯/乙醇进料的原始脱乙酰壳多糖膜的PV分离特性，其中甲苯/甲醇和甲苯/乙醇进料的组成为10- 40 wt.%甲苯在30°C。膜交联与戊二醛（GA），这是通过傅立叶变换红外光谱（FTIR）和离子交换容量（IEC）的测量证实。进行X射线衍射（X-RD）和扫描电子显微镜（SEM）研究，以了解膜形态。甲苯优先渗透，甲苯/甲醇混合物的选择性为264，通量为0.019-0.027kg/m2 h。301对甲苯/乙醇混合物的选择性为0.019 ~ 0.026kg/m ~ 2 h。随着进料中甲苯含量的增加，通量增加，而选择性降低。硅质岩含量的MMM的增加给增加的PV性能。
Mixed matrix membranes (MMMs) of chitosan were prepared by incorporating silicalite zeolite particles in 5 and 10wt.% with respect to weight of chitosan polymer to improve their pervaporation (PV) separation characteristics over that of pristine chitosan membrane for toluene/methanol and toluene/ethanol feeds in compositions of 10–40wt.% of toluene at 30°C. The membranes were crosslinked with glutaraldehyde (GA), which was confirmed by Fourier transform infrared spectroscopy (FTIR) and ion exchange capacity (IEC) measurements. X-ray diffraction (X-RD) and scanning electron microscopic (SEM) studies were performed to understand membrane morphology. Toluene permeated preferentially with a selectivity of 264 and fluxes of 0.019–0.027kg/m2h for toluene/methanol mixture. Selectivity of 301 with fluxes ranging from 0.019 to 0.026kg/m2h was observed for toluene/ethanol mixtures. Flux increased, while selectivity decreased with increasing toluene content of the feeds. An increase in silicalite content of the MMMs gave increased PV performances.