SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (7): 1477-1484.DOI: 10.1016/j.cjche.2018.01.027

• Separation Science and Engineering • 上一篇    下一篇

Modeling investigation of geometric size effect on pervaporation dehydration through scaled-up hollow fiber NaA zeolite membranes

Jiacheng Wang, Peng Ye, Xuechao Gao, Yuting Zhang, Xuehong Gu   

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, China
  • 收稿日期:2017-10-22 修回日期:2017-12-24 出版日期:2018-07-28 发布日期:2018-08-16
  • 通讯作者: Xuehong Gu,E-mail address:xhgu@njtech.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21490585 and 21776128), the National High-tech R&D Program of China (2015AA03A602), the "Six Top Talents" and "333 Talent Project" of Jiangsu Province, and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Modeling investigation of geometric size effect on pervaporation dehydration through scaled-up hollow fiber NaA zeolite membranes

Jiacheng Wang, Peng Ye, Xuechao Gao, Yuting Zhang, Xuehong Gu   

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, China
  • Received:2017-10-22 Revised:2017-12-24 Online:2018-07-28 Published:2018-08-16
  • Contact: Xuehong Gu,E-mail address:xhgu@njtech.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (21490585 and 21776128), the National High-tech R&D Program of China (2015AA03A602), the "Six Top Talents" and "333 Talent Project" of Jiangsu Province, and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

摘要: A mass transfer model in consideration of multi-layer resistances through NaA zeolite membrane and lumen pressure drop in the permeate side was developed to describe pervaporation dehydration through scaled-up hollow fiber supported NaA zeolite membrane. It was found that the transfer resistance in the lumen of the permeate side is strongly related with geometric size of hollow fiber zeolite membrane, which could not be neglected. The effect of geometric size on pervaporation dehydration could be more significant under higher vacuum pressure in the permeate side. The transfer resistance in the lumen increases with the hollow fiber length but decreases with lumen diameter. The geometric structure could be optimized in terms of the ratio of lumen diameter to membrane length. A critical value of dI/L (Rc) to achieve high permeation flux was empirically correlated with extraction pressure in the permeate side. Typically, for a hollow fiber supported NaA zeolite membrane with length of 0.40 m, the lumen diameter should be larger than 2.0 mm under the extraction pressure of 1500 Pa.

关键词: Pervaporation, NaA zeolite membrane, Hollow fiber, Lumen pressure drop, Geometric parameters

Abstract: A mass transfer model in consideration of multi-layer resistances through NaA zeolite membrane and lumen pressure drop in the permeate side was developed to describe pervaporation dehydration through scaled-up hollow fiber supported NaA zeolite membrane. It was found that the transfer resistance in the lumen of the permeate side is strongly related with geometric size of hollow fiber zeolite membrane, which could not be neglected. The effect of geometric size on pervaporation dehydration could be more significant under higher vacuum pressure in the permeate side. The transfer resistance in the lumen increases with the hollow fiber length but decreases with lumen diameter. The geometric structure could be optimized in terms of the ratio of lumen diameter to membrane length. A critical value of dI/L (Rc) to achieve high permeation flux was empirically correlated with extraction pressure in the permeate side. Typically, for a hollow fiber supported NaA zeolite membrane with length of 0.40 m, the lumen diameter should be larger than 2.0 mm under the extraction pressure of 1500 Pa.

Key words: Pervaporation, NaA zeolite membrane, Hollow fiber, Lumen pressure drop, Geometric parameters