School of Chemistry and Chemical Engineering, Southeast University, 2 Southeast University Road, Jiangning District, Nanjing 211189, China
Water Sci Technol. 2011;63(8):1695-700. doi: 10.2166/wst.2011.337.
Cellulose acetate/ polyacrylonitrile (CA/PAN) membranes were prepared and used to separate pyridine / water mixtures by pervaporation. The membranes were characterized through SEM. The effects of feed concentration, operation temperature and downstream pressure on the separation performance were evaluated. Experimental results indicated the increase of operation temperature could raise the permeation flux and the separation factor, while increasing feed concentration and downstream pressure would raise the separation factor and decrease the permeation flux. Under the conditions that pyridine solution was 99 wt.%, operation temperature was 323 K and downstream pressure was 20 mmHg, the CA/PAN blend membrane showed its best separation performance that the permeation flux was 56.g.m-2 h-1 and the separation factor was 182.
醋酸纤维素/聚丙烯腈（CA/PAN）膜被制备并用于通过渗透蒸发分离吡啶/水混合物。通过 SEM 对膜进行了表征。考察了进料浓度、操作温度和下游压力对分离性能的影响。实验结果表明，操作温度的升高可以提高渗透通量和分离因子，而进料浓度和下游压力的增加会提高分离因子并降低渗透通量。在吡啶溶液为 99wt.%、操作温度为 323K 和下游压力为 20mmHg 的条件下，CA/PAN 共混膜表现出最佳的分离性能，渗透通量为 56.g.m-2 h-1，分离因子为 182。
