中性溶质环境下纳滤膜分离性能实验研究  

Separation performance of nanofiltration membranes in neutral solution

作　　者：阳红 李赟 张会琴[2] 黄飚 叶春松[3] YANG Hong;LI Yun;ZHANG Huiqin;HUANG Biao;YE Chunsong(CSIC Environmental Engineering Co.Ltd.,Wuhan 430064,China;Hubei University of Technology,Wuhan 430068,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]中船重工环境工程有限公司,武汉430064 [2]湖北工业大学,武汉430068 [3]武汉大学动力与机械学院,武汉430072

出　　处：《膜科学与技术》2018年第6期41-47,共7页Membrane Science and Technology

基　　金：科技部;财政部国家中小企业创新基金

摘　　要：对NF270与GE DK两种纳滤膜在异丙醇、葡萄糖和蔗糖3种溶质环境下进行了不同条件实验,以测试膜的基本参数.并采用Matlab软件对S-K模型进行了实验数据的回归分析,得出了纳滤膜的反射系数与溶质透过系数.利用SHP模型测算了纳滤膜的孔径及孔隙率与厚度的比值,同时研究了3种中性溶质在纳滤膜分离过程中的热力学参数.结果表明,实验数据与S-K模型模拟结果的偏差在0～2.0%之间,模拟值与实验数据吻合;NF 270纳滤膜的平均孔径在0.54～0.61nm,GE DK纳滤膜的平均孔径在0.51～0.58nm;异丙醇、葡萄糖和蔗糖在NF 270纳滤膜分离过程中的活化能分别为14.24、31.86和78.41kJ/mol,异丙醇和葡萄糖在GE DK纳滤膜分离过程中的活化能分别为45.83和46.09kJ/mol.The basic parameters of NF270 and GE DK nanofiltration membranes have been tested using glycerol,glucose and sucrose solutions under different conditions.The reflection coefficients and solute permeability coefficients of the nanofiltration membranes were obtained by data regression of S-K model using Matlab.The pore size of the membranes and the ratio of porosity to thickness of the membranes were obtained using SHP model,while the thermodynamic parameters of three neutral solutes during nanofiltration were also studied.The deviations between the test data and S-K model simulation data were between 0%and 2.0%,which indicates the high consistency of the test data with S-K model.The pore size of NF270 membrane was from 0.54 nm to 0.61 nm,and that of GE DK membrane was from 0.51 nm to 0.58 nm.The activation energies during the separation of glycerol,glucose and sucrose solution by NF270 membrane were 14.24,31.86 and 78.41 kJ/mol respectively,and the activation energies during the separation of glucose and sucrose solution by GE DK membrane were 45.83 and 46.09 kJ/mol respectively.

关 键 词：中性溶质 纳滤膜 分离性能 活化能 反射系数 

分 类 号：TQ028.8[化学工程]