Water vapor permeation in polyimide membranes

Chen, George Q.; Scholes, Colin A.; Qiao, Greg G.; Kentish, Sandra E.

doi:10.1016/j.memsci.2011.06.023

Cited by 147 publications

(118 citation statements)

References 53 publications

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“…In other words, in multi-compound gaseous mixtures the presence of one gas affects the transport of the other(s), leading eventually to various separation limiting phenomena such as (penetrant induced) plasticization, competitive sorption, concentration polarization, etc. [19,51,81].…”

Section: 2mentioning

confidence: 99%

“…Moisture is strongly condensable and can extremely change the transport of all the compounds present in the mixture [19]. It could be responsible for membrane swelling, (moisture induced) plasticization and also competitive sorption can occur while the gas species compete for the absorption sites in the microvoids existing between the polymer chains in the membrane matrix.…”

Section: 2mentioning

confidence: 99%

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Biohydrogen purification by membranes: An overview on the operational conditions affecting the performance of non-porous, polymeric and ionic liquid based gas separation membranes

Bakonyi

Nemestóthy

Bélafi–Bakó

2013

International Journal of Hydrogen Energy

145

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Membrane Separation Polymer Ionic liquidIntegrated system a b s t r a c t Many types of membranes are available to enrich hydrogen. Nevertheless, there are some with special potential for biohydrogen purification such as the non-porous, polymeric and ionic liquid based membranes. The attractiveness of these membranes comes from the fact that they can be employed nearly under the conditions where biohydrogen formation taking place. Therefore, they appear as promising candidates to be coupled with hydrogen producing bioreactors and hence giving the chance for in situ biohydrogen concentration.It is known that the feasibility and efficiency of membrane technology e beside material selection and module design e significantly depend on the separation circumstances.Thus, the operation of membranes is a key issue and the most important factors to be considered for gas purification are the composition of gas to be separated, the pressure and temperature applied. The scope of this study is to give a comprehensive overview on the recent applications of non-porous, polymeric and ionic liquid supported membranes for biohydrogen recovery, placing emphasis on the operational conditions affecting membrane's behavior and performance. Furthermore, a novel concept for integrated biohydrogen production and purification using gas separation membranes is demonstrated and discussed.

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Section: 2mentioning

confidence: 99%

Section: 2mentioning

confidence: 99%

Biohydrogen purification by membranes: An overview on the operational conditions affecting the performance of non-porous, polymeric and ionic liquid based gas separation membranes

Bakonyi

Nemestóthy

Bélafi–Bakó

2013

International Journal of Hydrogen Energy

145

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“…Single gas permeabilities were undertaken on a variable pressure constant volume apparatus that has previously been reported [22]. Single gas measurements were undertaken with a feed pressure of 0.987 atm at 35 • C. Mixed gas permeability measurements were undertaken on a constant pressure variable volume instrument, which has also been previously reported and the protocol for exposure to water vapor has also been previously reported [6]. The feed gas was 10% CO 2 in CH 4 mixture at 9.87 atm and 35 • C. The choice in single gas and mixed gas feed pressures were to ensure the membranes experience the same partial pressure of CO 2 under both single and mixed gas conditions.…”

Section: Methodsmentioning

confidence: 99%

“…This also creates a problem in that glycol vapor entrained in the natural gas will also reduce the separation performance of downstream polymeric membranes [5]. Previous research has demonstrated that exposure to water vapor can reduce the permselectivity of the polyimide 6FDA-TMPDA by 50% [6] and for high performance PIM-1 membranes by 38% [7]. The majority of the research has focused on water removal from the feed stream, in dehydration applications [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Water Resistant Composite Membranes for Carbon Dioxide Separation from Methane

Scholes

2018

Applied Sciences

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Abstract:Membranes that are resistant to water vapor permeation have potential in natural gas sweetening by reducing the need for pretreatment. The perfluorinated polymer Teflon AF1600 has proven resistance to water vapor, which is adapted here in the form of composite membranes consisting of a Teflon AF1600 protective layer on membranes of the polyimide 4,4 -(hexafluoroisopropylidene) diphthalic anhydride 2,3,5,6-tetramethyl-1,4-phenylenediamine (6FDA-TMPDA) as well as Polymer of Intrinsic Micro-porosity (PIM-1). The permeability of CO 2 and CH 4 through the composite membranes was shown to be a function of the respective permeabilities of the individual polymer layers, with the Teflon AF1600 layer providing the majority of the resistance to mass transfer. Upon exposure to water, the composite membranes had reduced water permeation of 7-13% compared to pure membranes of 6FDA-TMPDA and PIM-1, because of the water resistance of the Teflon AF1600 layer. It was observed that water permeated as clusters through the composite structure. Under CO 2 -CH 4 mixed gas conditions, 6FDA-TMPDA layer permselectivity performance was reduced and became comparable to Teflon AF1600, while the PIM-1 layer retained much of its high permselectivity performance. Importantly, at water activities below 0.2 the PIM-1 composite membrane achieved higher permeability for CO 2 compared to water.

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“…In recent work, watervapor permeation with Matrimid 5218 has been explored. These experiments focused on water-vapor permeability at 35°C, along with analysis of the effects of water in a mixed-gas stream at different pressures (Chen, 2011, Water vapor permeation in polyimide membranes). This study suggested that water vapor at ambient temperatures may be causing polymer plasticization through water clustering, which in turn, altered the permeability of other gases.…”

Section: Measuring Gas Permeability With Water Vapormentioning

confidence: 99%

Water-Gas-Shift Membrane Reactor for High-Pressure Hydrogen Production. A comprehensive project report (FY2010 - FY2012)

Klaehn¹,

Peterson²,

Orme³

et al. 2013

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Idaho National Laboratory (INL), GE Global Research (GEGR), and Western Research Institute (WRI) have successfully produced hydrogenselective membranes for water-gas-shift (WGS) modules that enable high-pressure hydrogen product streams. Several high performance (HP) polymer membranes were investigated for their gas separation performance under simulated (mixed gas) and actual syngas conditions. To enable optimal module performance, membranes with high hydrogen (H 2 ) selectivity, permeance, and stability under WGS conditions are required. The team determined that the VTEC PI 80-051 and VTEC PI 1388 (polyimide from Richard Blaine International, Inc.) are prime candidates for the H 2 gas separations at operating temperatures (~200°C). VTEC PI 80-051 was thoroughly analyzed for its H 2 separations under syngas processing conditions using more-complex membrane configurations, such as tube modules and hollow fibers. These membrane formats have demonstrated that the selected VTEC membrane is capable of providing highly selective H 2 /CO 2 separation (α = 7-9) and H 2 /CO separation (α = 40-80) in humidified syngas streams. In addition, the VTEC polymer membranes are resilient within the syngas environment (WRI coal gasification) at 200°C for over 1000 hours. The information within this report conveys current developments of VTEC PI 80-051 as an effective H 2 gas separations membrane for high-temperature syngas streams.iii ACKNOWLEDGEMENTS

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Water vapor permeation in polyimide membranes

Cited by 147 publications

References 53 publications

Biohydrogen purification by membranes: An overview on the operational conditions affecting the performance of non-porous, polymeric and ionic liquid based gas separation membranes

Biohydrogen purification by membranes: An overview on the operational conditions affecting the performance of non-porous, polymeric and ionic liquid based gas separation membranes

Water Resistant Composite Membranes for Carbon Dioxide Separation from Methane

Water-Gas-Shift Membrane Reactor for High-Pressure Hydrogen Production. A comprehensive project report (FY2010 - FY2012)

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