Use of nonporous polymeric flat-sheet gas-separation membranes in a membrane-iquid contactor: Experimental studies
Date
1996
Authors
Bessarabov D.G.
Jacobs E.P.
Sanderson R.D.
Beckman I.N.
Journal Title
Journal ISSN
Volume Title
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Abstract
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.
Description
Keywords
Membranes-Liquid, Separation-Gas/Gas, Block copolymers, Flow of fluids, Gas permeable membranes, Liquid membranes, Mass transfer, Polysilanes, Separation, Flowing liquid membranes, Gas separation, Low temperature bubble free deoxygenation, Membrane liquid contactors, Nonporous membranes, Poly(vinyltrimethylsilane), Polydimethylsiloxane, Polyphenylsilsesquioxane, Polymeric membranes, copolymer, dimeticone, hydrogen, silane derivative, artificial membrane, conference paper, gas diffusion, liquid membrane, membrane permeability, oxygenation, priority journal, water flow
Citation
Journal of Membrane Science
113
2
113
2