Use of nonporous polymeric flat-sheet gas-separation membranes in a membrane-liquid contactor: Experimental studies

被引：29

作者：

Bessarabov, DG ^{[1
]}

Jacobs, EP ^{[1
]}

Sanderson, RD ^{[1
]}

Beckman, IN ^{[1
]}

机构：

[1] MOSCOW MV LOMONOSOV STATE UNIV,DEPT CHEM,MOSCOW 119899,RUSSIA

来源：

JOURNAL OF MEMBRANE SCIENCE | 1996年 / 113卷 / 02期

关键词：

gas separations; liquid membranes; membrane-liquid contactors; flowing liquid membranes;

D O I：

10.1016/0376-7388(95)00126-3

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

Flat-sheet non-porous asymmetric poly(vinyltrimethylsilane) (PVTMS) membranes and composite membranes comprising a dense layer of polydimethylsiloxane/polyphenylsilsesquioxane (PDMS/PPSQ) block copolymer were evaluated for low-temperature bubble-free deoxygenation of water flowing in a two-channel countercurrent liquid-membrane contactor. A novel large-scale three-channel flowing-liquid-membrane module (selective membrane valve), designed for gas separation, is also described. The system comprised PVTMS or PDMS/PPSQ non-porous membranes which acted as gas-permeable barriers. A membrane system (SMV) in which pure water formed a flowing liquid membrane was evaluated to control hydrogen transfer rates. The liquid flowing along the turbulence-promoter spacers between the membranes reduced liquid-film resistance. The overall mass-transfer coefficients were found to be a function of the liquid flow rate. The liquid-film resistance controlled the rate of gas transfer in such membrane contactors.

引用

页码：275 / 284

页数：10

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