Modelling competitive sorption and plasticization of glassy polymeric membranes used in biogas upgrading

Miandoab, Ehsan Soroodan; Kentish, Sandra E.; Scholes, Colin A.

doi:10.1016/j.memsci.2020.118643

Cited by 18 publications

(20 citation statements)

References 56 publications

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“…In the partial immobilization model, it was assumed that not all gas molecules sorbed are mobile and contribute to the gas transport. This model also includes the term to account for competitive sorption [56].…”

Section: Transport Mechanism For Gas Separation Membranementioning

confidence: 99%

“…The simplistic membrane model that does not account for such complex effects can deviate more than 20% from a more rigorous approach. Miandoab et al [56] has developed a mathematical model for membrane performance that incorporates fugacity-dependent permeabilities, competitive sorption, penetrant blocking and plasticization effects. The model also considers nonisothermal operation and includes real gas behaviour and concentration polarization.…”

Section: Transport Mechanism For Gas Separation Membranementioning

confidence: 99%

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Recent Advances of Polymeric Membranes in Tackling Plasticization and Aging for Practical Industrial CO2/CH4 Applications—A Review

et al. 2022

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Membranes are a promising technology for bulk CO2 separation from natural gas mixtures due to their numerous advantages. Despite the numerous fundamental studies on creating better quality membrane efficiency, scaling up the research work for field testing requires huge efforts. The challenge is to ensure the stability of the membrane throughout the operation while maintaining its high performance. This review addresses the key challenges in the application of polymeric technology for CO2 separation, focusing on plasticization and aging. A brief introduction to the properties and limitations of the current commercial polymeric membrane is first deliberated. The effect of each plasticizer component in natural gas towards membrane performance and the relationship between operating conditions and the membrane efficiency are discussed in this review. The recent technological advancements and techniques to overcome the plasticization and aging issues covering polymer modification, high free-volume polymers, polymer blending and facilitated transport membranes (FTMs) have been highlighted. We also give our perspectives on a few main features of research related to polymeric membranes and the way forwards. Upcoming research must emphasize mixed gas with CO2 including minor condensable contaminants as per real natural gas, to determine the competitive sorption effect on CO2 permeability and membrane selectivity. The effects of pore blocking, plasticization and aging should be given particular attention to cater for large-scale applications.

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Section: Transport Mechanism For Gas Separation Membranementioning

confidence: 99%

Section: Transport Mechanism For Gas Separation Membranementioning

confidence: 99%

Recent Advances of Polymeric Membranes in Tackling Plasticization and Aging for Practical Industrial CO2/CH4 Applications—A Review

et al. 2022

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“…This finding allows the membrane to remove more H2S than CO2 to assist in reducing final polishing to meet the pipeline specifications and demonstrates the simultaneous removal of H2S and CO2 capability of the membrane. It shows that plasticization do promotes H2S/CH4 separation performance by providing more sorption capacity on the newly created free volume in the polymer (Liu, Liu, Morisato, et al, 2020).…”

Section: H2smentioning

confidence: 95%

“…CH4 permeation is inhibited by H2S and CO2 leads to selectivity improvement. At the sametime, CO2 and H2S permeabilities enhancement during the ternary gas permeation process in the 6FDA-based polyimide membranes is due to plasticization (Liu, Liu, Liu, et al, 2020) that swell the membrane slightly which is not big enough for CH4 to pass through. This is a good plasticization effect that enhance the permeability at certain period before reaching the point of selectivity reduction when the membrane been plasticized severely.…”

Section: H2smentioning

confidence: 99%

Challenges in Membrane Process for Gas Separation from Natural Gas

Farahdila

Goh

Ismail

et al. 2021

AMST

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Membrane technology is cost effective solution for CO2 removal from natural gas. However, there is challenges during its application depending on the polymer material characteristic. Understanding on the polymer fundamental and transport properties, will enable proper design of pre-treatment and operating conditions that suits its capability envelope. Diffusivity selective membrane favors high pressure and high temperature conditions and vice versa for solubility selective polymer. On top of that, the robustness and durability of the resultant membrane, need to be evaluated with multicomponent mixture to understand the effect of competitive sorption, plasticization and aging phenomena that will seriously impacting the membrane performance during its application.

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“…The problem was lately raised by Miandoab et al [39] in their attempt concerning strict modelling of biogas upgrading in a module with a Matrimid membrane. They used the dual mode sorption (DMS) model in order to determine the concentration of gases in the glassy polymer.…”

Section: Separation Of Ch 4 /Co 2 and Model Validationmentioning

confidence: 99%

Upgrading Biogas from Small Agricultural Sources into Biomethane by Membrane Separation

2021

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The agriculture sector in Poland could provide 7.8 billion m3 of biogas per year, but this potential would be from dispersed plants of a low capacity. In the current study, a membrane process was investigated for the upgrading biogas to biomethane that conforms to the requirements for grid gas in Poland. It was assumed that such a process is based on membranes made from modified polysulfone or polyimide, available in the market in Air Products PRISM PA1020 and UBE UMS-A5 modules, respectively. The case study has served an agricultural biogas plant in southern Poland, which provides the stream of 5 m3 (STP) h−1 of biogas with a composition of CH4 (52 vol.%), CO2 (46.3 vol.%), N2 (1.6 vol.%) and O2 (0.1 vol.%), after a pretreatment. It was theoretically shown that this is possible to obtain the biomethane stream of at least 96 vol.% of CH4 purity, with the concentration of the other biogas components below their respective thresholds, as required in Poland for gas fuel “E”, with methane recovery of up to 87.5% and 71.6% for polyimide and polysulfone membranes, respectively. The energetic efficiency of the separation process is comparable for both membrane materials, as expressed by power excess index, which reaches up to 51.3 kWth kWel−1 (polyimide) and 40.7 kWth kWel−1 (polysulfone). In turn, the membrane productivity was significantly higher in the case of the polyimide membrane (up to 38.3 kWth m−2) than those based on the polysulfone one (up to 3.13 kWth m−2).

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Modelling competitive sorption and plasticization of glassy polymeric membranes used in biogas upgrading

Cited by 18 publications

References 56 publications

Recent Advances of Polymeric Membranes in Tackling Plasticization and Aging for Practical Industrial CO2/CH4 Applications—A Review

Recent Advances of Polymeric Membranes in Tackling Plasticization and Aging for Practical Industrial CO2/CH4 Applications—A Review

Challenges in Membrane Process for Gas Separation from Natural Gas

Upgrading Biogas from Small Agricultural Sources into Biomethane by Membrane Separation

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