The Separative Performance of Modules with Polymeric Membranes for a Hybrid Adsorptive/Membrane Process of CO2 Capture from Flue Gas

Commercially available polymeric membrane materials may also show their potential for CO2 capture by the association of the membrane process with other separation techniques in a hybrid system. In the current study, PRISM PA1020/Air Products and UBE UMS-A5 modules with membrane formed of modified polysulfone and polyimide, respectively, were assessed as a second stage in the hybrid vacuum swing adsorption (VSA)–membrane process developed in our laboratory. For this purpose, the module permeances of CO2, N2, and O2 at different temperatures were determined, and the separation of CO2/N2 and CO2/N2/O2 mixtures was investigated in an experimental setup. An appropriate mathematical model was also developed and validated based on experimental data. It was found that both modules can provide CO2-rich gas of the purity of > 95% with virtually the same recovery (40.7−63.6% for maximum carbon dioxide content in permeate) when fed with pre-enriched effluent from the VSA unit. It was also found that this level of purity and recovery was reached at a low feed to permeate the pressure ratio (2−2.5) in both modules. In addition, both modules reveal stable separation performance, and thus, their applicability in a hybrid system depends on investment outlays and will be the subject of optimization investigations, which will be supported by the model presented and validated in this study.

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Effects of Ionic Liquid Blending in Polymeric Membrane: Physical Properties and Performance Evaluation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.625.680 ◽

2014 ◽

Vol 625 ◽

pp. 680-684 ◽

Cited By ~ 2

Author(s):

Dzeti Farhah Mohshim ◽

Hilmi Mukhtar ◽

Zakaria Man

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Membrane Separation ◽

Initial Study ◽

Polymeric Membranes ◽

Polymeric Membrane ◽

Separation Performance ◽

Operating Pressure ◽

Membrane Gas Separation ◽

Pes Membrane

— Polymeric membranes have been extensively used in membrane gas separation process. Nowadays, peoples are modifying the membrane by many ways like coating with ionic liquids to further enhance the membrane separation performance. In this project, ionic liquid modified polymeric membranes (ILMPM) have been successfully developed by blending the ionic liquids with the polymer via solvent evaporation method. The ionic liquid used was 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide, ([emim][Tf2N]) and for comparison purpose, the compositions were varied at 10 and 20 wt/wt%. In general, the blending of [emim][Tf2N] and PES has produced dense membrane with miscible mixture without any phase separation. It was observed that, the CO2permeance of ILMPM has been improved about 271% as compared to the pure PES membrane. However, the CO2permeance decreased with increasing operating pressure, yet the ILMPM CO2permeance still higher than CO2permeance of pure PES membrane. In addition, the CO2/CH4separation performance has greatly increased about 162% as the IL composition is increased. This initial study has proven that IL helps to enhance of CO2permeation and improve selectivity.

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Recent Progress in the Engineering of Polymeric Membranes for CO2 Capture from Flue Gas

Membranes ◽

10.3390/membranes10110365 ◽

2020 ◽

Vol 10 (11) ◽

pp. 365

Author(s):

Yang Han ◽

Yutong Yang ◽

W. S. Winston Ho

Keyword(s):

Gas Separation ◽

Co2 Capture ◽

Flue Gas ◽

Large Scale ◽

Recent Progress ◽

Scale Up ◽

Polymeric Membranes ◽

Separation Performance ◽

Separation Membranes ◽

Gas Separation Membranes

CO2 capture from coal- or natural gas-derived flue gas has been widely considered as the next opportunity for the large-scale deployment of gas separation membranes. Despite the tremendous progress made in the synthesis of polymeric membranes with high CO2/N2 separation performance, only a few membrane technologies were advanced to the bench-scale study or above from a highly idealized laboratory setting. Therefore, the recent progress in polymeric membranes is reviewed in the perspectives of capture system energetics, process synthesis, membrane scale-up, modular fabrication, and field tests. These engineering considerations can provide a holistic approach to better guide membrane research and accelerate the commercialization of gas separation membranes for post-combustion carbon capture.

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Ionic Liquid Polymeric Membrane: Synthesis, Characterization & Performance Evaluation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.594-595.18 ◽

2013 ◽

Vol 594-595 ◽

pp. 18-23 ◽

Cited By ~ 2

Author(s):

Dzeti Farhah Mohshim ◽

Hilmi Mukhtar ◽

Zakaria Man

Keyword(s):

Ionic Liquid ◽

Membrane Separation ◽

Ideal Gas ◽

Gas Permeation ◽

Polymeric Membranes ◽

Polymeric Membrane ◽

Separation Performance ◽

Miscible Blends ◽

Pes Membrane ◽

The Ideal

Selected ionic liquids are known to enhance the absorption of CO2 for CO2 removal purpose. In the idea to improve the membrane separation performance for natural gas sweetening, ionic liquid modified polymeric membranes were fabricated by using polyethersulfone (PES) and blended with different composition of ionic liquid which are 5 wt% and 15 wt%. Each fabricated membranes were prepared and dried under solvent evaporation at 90°C. Dense structure observed from FESEM analysis indicated the miscible blends of ionic liquid and PES. TGA analysis showed all fabricated membranes are still containing solvent and this resembles that membrane drying period is still insufficient. All fabricated membranes were tested with ideal gas permeation test. From the result, the addition of ionic liquid has enhanced the ideal CO2 pemeance about 150% as compared to pure PES membrane. The ideal CO2/CH4 selectivity was also increase about 85% from the base but however, the separation index is still considered low and this may due to the presence of the solvent. This preliminary result has confirmed that the blending of ionic liquid with pure PES membrane has technically improved the membrane separation performance.

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The prospect of synthesis of PES/PEG blend membranes using blend NMP/DMF for CO2/N2 separation

Journal of Polymer Research ◽

10.1007/s10965-021-02500-6 ◽

2021 ◽

Vol 28 (5) ◽

Author(s):

Fadel Abdul Hadi Juber ◽

Zeinab Abbas Jawad ◽

Bridgid Lai Fui Chin ◽

Swee Pin Yeap ◽

Thiam Leng Chew

Keyword(s):

Gas Separation ◽

Carbon Capture ◽

Membrane Separation ◽

Carbon Capture And Storage ◽

Polymeric Membranes ◽

Polymeric Membrane ◽

Mixed Matrix Membranes ◽

Separation Performance ◽

Trade Off ◽

Blend Membranes

AbstractCarbon dioxide (CO2) emissions have been the root cause for anthropogenic climate change. Decarbonisation strategies, particularly carbon capture and storage (CCS) are crucial for mitigating the risk of global warming. Among all current CO2 separation technologies, membrane separation has the biggest potential for CCS as it is inexpensive, highly efficient, and simple to operate. Polymeric membranes are the preferred choice for the gas separation industry due to simpler methods of fabrication and lower costs compared to inorganic or mixed matrix membranes (MMMs). However, plasticisation and upper-bound trade-off between selectivity and permeability has limited the gas separation performance of polymeric membranes. Recently, researchers have found that the blending of glassy and rubbery polymers can effectively minimise trade-off between selectivity and permeability. Glassy poly(ethersulfone) (PES) and rubbery poly(ethylene) glycol (PEG) are polymers that are known to have a high affinity towards CO2. In this paper, PEG and PES are reviewed as potential polymer blend that can yield a final membrane with high CO2 permeance and CO2/nitrogen (N2) selectivity. Gas separation properties can be enhanced by using different solvents in the phase-inversion process. N-Methyl-2-Pyrrolidone (NMP) and Dimethylformamide (DMF) are common industrial solvents used for membrane fabrication. Both NMP and DMF are reviewed as prospective solvent blend that can improve the morphology and separation properties of PES/PEG blend membranes due to their effects on the membrane structure which increases permeation as well as selectivity. Thus, a PES/PEG blend polymeric membrane fabricated using NMP and DMF solvents is believed to be a major prospect for CO2/N2 gas separation.

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Substrate-Independent, Regenerable Anti-Biofouling Coating for Polymeric Membranes

Membranes ◽

10.3390/membranes11030205 ◽

2021 ◽

Vol 11 (3) ◽

pp. 205

Author(s):

Juan Zhang ◽

Guang Wang ◽

Jianhua Zhang ◽

Zhiguang Xu ◽

Yan Zhao ◽

...

Keyword(s):

Silver Nanoparticles ◽

Membrane Surface ◽

Polymeric Membranes ◽

Polymeric Membrane ◽

Energy Costs ◽

Membrane Process ◽

Permeate Flux ◽

Membrane Surfaces ◽

Substrate Independent

Biofouling is a common but significant issue in the membrane process as it reduces permeate flux, increases energy costs, and shortens the life span of membranes. As an effective antibacterial agent, a small amount of silver nanoparticles (AgNPs) immobilized on membrane surfaces will alleviate the membrane from biofouling. However, loading AgNPs on the membrane surface remains a challenge due to the low loading efficiency or the lack of bonding stability between AgNPs and the membrane surface. In this study, a substrate-independent method is reported to immobilize silver nanoparticles on polymeric membrane surfaces by firstly modifying the membrane surface with functional groups and then forming silver nanoparticles in situ. The obtained membranes had good anti-biofouling properties as demonstrated from disk diffusion and anti-biofouling tests. The silver nanoparticles were stably immobilized on the membrane surfaces and easily regenerated. This method is applicable to various polymeric micro-, ultra-, nano-filtration and reverse osmosis (RO) membranes.

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Waste Reutilization in Polymeric Membrane Fabrication: A New Direction in Membranes for Separation

Membranes ◽

10.3390/membranes11100782 ◽

2021 ◽

Vol 11 (10) ◽

pp. 782

Author(s):

Pei Sean Goh ◽

Mohd Hafiz Dzarfan Othman ◽

Takeshi Matsuura

Keyword(s):

Solid Waste ◽

Raw Materials ◽

Polymeric Membranes ◽

Solid Wastes ◽

Raw Material ◽

Polymeric Membrane ◽

Separation Performance ◽

Membrane Fabrication ◽

Promising Strategy ◽

Separation Membrane

In parallel to the rapid growth in economic and social activities, there has been an undesirable increase in environmental degradation due to the massively produced and disposed waste. The need to manage waste in a more innovative manner has become an urgent matter. In response to the call for circular economy, some solid wastes can offer plenty of opportunities to be reutilized as raw materials for the fabrication of functional, high-value products. In the context of solid waste-derived polymeric membrane development, this strategy can pave a way to reduce the consumption of conventional feedstock for the production of synthetic polymers and simultaneously to dampen the negative environmental impacts resulting from the improper management of these solid wastes. The review aims to offer a platform for overviewing the potentials of reutilizing solid waste in liquid separation membrane fabrication by covering the important aspects, including waste pretreatment and raw material extraction, membrane fabrication and characterizations, as well as the separation performance evaluation of the resultant membranes. Three major types of waste-derived polymeric raw materials, namely keratin, cellulose, and plastics, are discussed based on the waste origins, limitations in the waste processing, and their conversion into polymeric membranes. With the promising material properties and viability of processing facilities, recycling and reutilization of waste resources for membrane fabrication are deemed to be a promising strategy that can bring about huge benefits in multiple ways, especially to make a step closer to sustainable and green membrane production.

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Porous Aluminophosphates as Adsorbents for the Separation of CO2/CH4 and CH4/N2 Mixtures – a Monte Carlo Simulation Study

10.26434/chemrxiv.6133346.v2 ◽

2018 ◽

Author(s):

Michael Fischer

Keyword(s):

Monte Carlo ◽

Landfill Gas ◽

Experimental Studies ◽

Chem Phys ◽

Monte Carlo Simulation Study ◽

Mixture Adsorption ◽

Vacuum Swing Adsorption ◽

Separation Of Co2 ◽

Pressure Swing ◽

Gcmc Simulations

<div>Aluminophosphates with zeolite-like topologies (AlPOs) have received considerable attention as potential adsorbents for use in the separation of methane-containing gas mixtures. Such separations, especially the removal of carbon dioxide and nitrogen from methane, are of great technological relevance in the context of the “upgrade” of natural gas, landfill gas, and biogas. While more than 50 zeolite frameworks have been synthesised in aluminophosphate composition or as heteroatom substituted AlPO derivatives, only a few of them have been characterised experimentally with regard to their adsorption and separation behaviour. In order to predict the potential of a variety of AlPO frameworks for applications in CO2/CH4 and CH4/N2 separations, atomistic grand-canonical Monte Carlo (GCMC) simulations were performed for 53 different structures. Building on previous work, which studied CO2/N2 mixture adsorption in AlPOs (M. Fischer, Phys. Chem. Chem. Phys., 2017, 19, 22801–22812), force field parameters for methane adsorption in AlPOs were validated through a comparison to available experimental adsorption data. Afterwards, CO2/CH4 and CH4/N2 mixture isotherms were computed for all 53 frameworks for room temperature and total pressures up to 1000 kPa (10 bar), allowing the prediction of selectivities and working capacities for conditions that are relevant for pressure swing adsorption (PSA) and vacuum swing adsorption (VSA). For CO2/CH4 mixtures, the GIS, SIV, and ATT frameworks were found to have the highest selectivities and CO2 working capacities under VSA conditions, whereas several frameworks, among them AFY, KFI, AEI, and LTA, show higher working capacities under PSA conditions. For CH4/N2 mixtures, all frameworks are moderately selective for methane over nitrogen, with ATV exhibiting a significantly higher selectivity than all other frameworks. While some of the most promising topologies are either not available in pure-AlPO4 composition or collapse upon calcination, others can be synthesised and activated, rendering them interesting candidates for future experimental studies. In addition to predictions of mixture adsorption isotherms, further simulations were performed for four selected systems in order to investigate the microscopic origins of the macroscopic adsorption behaviour, e.g. with regard to the very high CH4/N2 selectivity of ATV and the loading-dependent evolution of the heat of CO2 adsorption and CO2/CH4 selectivity of AEI and GME.</div>

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The Long-Lasting Story of One Sensor Development: From Novel Ionophore Design toward the Sensor Selectivity Modeling and Lifetime Improvement

Sensors ◽

10.3390/s21041401 ◽

2021 ◽

Vol 21 (4) ◽

pp. 1401

Author(s):

Larisa Lvova ◽

Donato Monti ◽

Corrado Di Natale ◽

Roberto Paolesse

Keyword(s):

Anion Exchanger ◽

Specific Interaction ◽

Spectroscopic Studies ◽

Polymeric Membranes ◽

Polymeric Membrane ◽

Active Components ◽

Nitrite Ion ◽

Working Mechanism ◽

Axial Coordination ◽

Porphyrin Aggregation

The metalloporphyrin ligand bearing incorporated anion-exchanger fragment, 5-[4-(3-trimethylammonium)propyloxyphenyl]-10,15,20-triphenylporphyrinate of Co(II) chloride, CoTPP-N, has been tested as anion-selective ionophore in PVC-based solvent polymeric membrane sensors. A plausible sensor working mechanism includes the axial coordination of the target anion on ionophore metal center followed by the formed complex aggregation with the second ionophore molecule through positively charged anion-exchanger fragment. The UV-visible spectroscopic studies in solution have revealed that the analyte concentration increase induces the J-type porphyrin aggregation. Polymeric membranes doped with CoTPP-N showed close to the theoretical Nernstian response toward nitrite ion, preferably coordinated by the ionophore, and were dependent on the presence of additional membrane-active components (lipophilic ionic sites and ionophore) in the membrane phase. The resulting selectivity was a subject of specific interaction and/or steric factors. Moreover, it was demonstrated theoretically and confirmed experimentally that the selection of a proper ratio of ionophore and anionic additive can optimize the sensor selectivity and lifetime.

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