高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (5): 912.

• 研究论文 • 上一篇    下一篇

湿润率对疏水性膜接触器传质性能的影响

陆建刚, 王连军, 刘晓东, 李健生, 孙秀云   

  1. 南京理工大学化工学院, 南京210094
  • 收稿日期:2004-04-16 出版日期:2005-05-10 发布日期:2005-05-10
  • 通讯作者: 王连军(1961年出生),男,博士,教授,博士生导师,从事膜分离与膜材料研究.E-mail:wanglj@mail.njust.edu.cn E-mail:wanglj@mail.njust.edu.cn
  • 基金资助:

    教育部博士学科点基金(批准号:20020288015)资助.

Effect of Wettability on Mass Transfer Performance of Hydrophobic Membrane Contactor

LU Jian-Gang, WANG Lian-Jun, LIU Xiao-Dong, LI Jian-Sheng, SUN Xiu-Yun   

  1. College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2004-04-16 Online:2005-05-10 Published:2005-05-10

摘要: 根据双膜理论提出了疏水性膜湿润机理,关联了阻力层方程、Laplace方程和膜孔径分布函数,建立了新型传质数学模型,采用PP疏水性微孔膜、水和MDEA(N-甲基二乙醇胺)水溶液为吸收剂,研究了膜接触器吸收CO2传质过程,考察了压差、表面张力和温度等因素所产生的湿润率对传质性能的影响.结果表明,用新型模型能较准确地预测湿润率对传质系数的影响,模型值与实验值符合较好;压差、表面张力和温度对湿润率影响较大,是膜接触器传质过程需要考虑的因素.

关键词: 湿润率, 疏水性膜, 传质系数, 数学模型

Abstract: A mechanism of wettability for hydrophobic membrane was presented based on bi-film theory. Resistance equation, Laplace equation and pore size distribution function of membrane were correlated, and a novel mass-transfer mathematical model was developed. The process of mass-transfer of CO2 absorption in membrane contactor was studied by using hydrophobic microporous PP membrane and absorbents of water or MDEA(N-methyldiethanolamine) aqueous solution. The effects of wettabilities engendered by pressure difference, surface tension and temperature on mass transfer were investigated. The results show that the model can be used to predict better the mass-transfer coefficients caused by wettability, and the predicted values are in good agreement with the experimental data; wettabilities caused by pressure difference, surface tension and temperature give rise to significant effects on mass transfer and should be taken into consideration in gas-liquid membrane contactor.

Key words: Wettability, Hydrophobic membrane, Mass transfer coefficient, Mathematical model

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