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1. Copolyimide mixed matrix membranes with oriented microporous titanosilicate JDF-L1 sheet particles

Author:
Galve, Alejandro; Sieffert, Daniel; Vispe, Eugenio; Téllez, Carlos; Coronas, Joaquín; Staudt, Claudia
Source:
Journal of membrane science 2011 v.370 no.1-2 pp. 131-140
ISSN:
0376-7388
Subject:
Raman spectroscopy; X-ray diffraction; artificial membranes; crystals; electron microscopy; hydrogen; methane; polymers; porosity; quantitative analysis; statistical models; surfactants
Abstract:
... JDF-L1 is a microporous titanosilicate exhibiting a layer structure with pore size of about 3Å. It is consequently an attractive material to separate H₂-containing mixtures. This is the reason why JDF-L1, after disaggregation by means of hexadecyltrimethylammonium surfactant, has been combined with a carboxyl group containing copolyimide (6FDA-4MPD/6FDA-DABA 4:1) to produce mixed matrix membranes, ...
DOI:
10.1016/j.memsci.2011.01.011

2. Effect of SBA-15 texture on the gas separation characteristics of SBA-15/polymer multilayer mixed matrix membrane

Author:
Weng, Tzu-Hsiang; Tseng, Hui-Hsin; Wey, Ming-Yen
Source:
Journal of membrane science 2011 v.369 no.1-2 pp. 550-559
ISSN:
0376-7388
Subject:
artificial membranes; crystal structure; crystals; glass transition temperature; hydrogen; methane; mixing; polymers; silica; surface area; texture
Abstract:
... The authors previously synthesized a SBA-15/PPO multilayer mixed matrix membranes (MMMs) and demonstrated that the SBA-15 filler itself may create additional passageway for gas pass through. The objectives of this work were to investigate the effect of texture of SBA-15, including pore sizes, pore volume, and external surface area, on the structure of MMMs and gas permeation performance. To obtain ...
DOI:
10.1016/j.memsci.2010.12.039

3. Effect of zeolitic imidazolate frameworks on the gas transport performance of ZIF8-poly(1,4-phenylene ether-ether-sulfone) hybrid membranes

Author:
Díaz, Kenya; López-González, Mar; del Castillo, Luis F.; Riande, Evaristo
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 206-213
ISSN:
0376-7388
Subject:
activation energy; artificial membranes; carbon dioxide; diffusivity; ethane; ethylene; gases; glass transition temperature; hydrogen; methane; nitrogen; oxygen; permeability; polymers
Abstract:
... This work reports the permeability of hydrogen, nitrogen, oxygen, carbon dioxide, methane, ethane and ethylene across ZIF-8/poly(1,4-phenylen ether-ether-sulfone) hybrid membranes containing 0, 0.10, 0.20 and 0.30 weight fractions of ZIF-8. The glass transition temperature is independent on the filler content suggesting that the filler does not affect the polymer chains mobility. The study was car ...
DOI:
10.1016/j.memsci.2011.08.042

4. Fabrication and characterization of PPO/PVP blend carbon molecular sieve membranes for H₂/N₂ and H₂/CH₄ separation

Author:
Itta, Arun Kumar; Tseng, Hui-Hsin; Wey, Ming-Yen
Source:
Journal of membrane science 2011 v.372 no.1-2 pp. 387-395
ISSN:
0376-7388
Subject:
artificial membranes; carbon; carbon dioxide; hydrogen; methane; nitrogen; permeability; polymers; pyrolysis; sieving; temperature
Abstract:
... Through a spin-coating technique, a high performance carbon molecular sieve (CMS) membranes were fabricated from thermally stable polymer polyphenylene oxide (PPO) and thermally labile polymer poly vinylpyrrolidone (PVP). The permeation results show that the small gas molecules (H₂, CO₂, N₂, and CH₄) transport mechanism is dominated by the molecular sieving effect. The permeation performances have ...
DOI:
10.1016/j.memsci.2011.02.027

5. High-temperature proton exchange membranes based on polybenzimidazole and clay composites for fuel cells

Author:
Plackett, David; Siu, Ana; Li, Qingfeng; Pan, Chao; Jensen, Jens Oluf; Nielsen, Søren Fæster; Permyakova, Anastasia A.; Bjerrum, Niels J.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 78-87
ISSN:
0376-7388
Subject:
X-radiation; ambient temperature; artificial membranes; cations; clay; dimensional stability; electric power; fuel cells; hydrogen; hydrogen bonding; infrared spectroscopy; ion exchange; permeability; phosphoric acid; polymers; relative humidity; salts; tensile strength
Abstract:
... Good dispersion of modified laponite clay was achieved in polybenzimidazole (PBI) solutions which, when cast and allowed to dry, resulted in homogeneous and transparent composite membranes containing up to 20wt% clay in the polymer. The clay was organically modified using a series of ammonium and pyridinium salts with varying polarity and hydrogen-bonding capacity. Clay modification by ion-exchang ...
DOI:
10.1016/j.memsci.2011.08.038

6. Membrane performance requirements for carbon dioxide capture using hydrogen-selective membranes in integrated gasification combined cycle (IGCC) power plants

Author:
Ku, Anthony Y.; Kulkarni, Parag; Shisler, Roger; Wei, Wei
Source:
Journal of membrane science 2011 v.367 no.1-2 pp. 233-239
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; ceramics; energy; fuels; gasification; greenhouse gas emissions; hydrogen; polymers; power generation; power plants; production technology; temperature; zeolites
Abstract:
... Precombustion CO₂ capture is an important option for the management of greenhouse gas emissions from power generation, because the higher concentrations can lead to improved separation economics. Membranes can provide a significant boost in the performance by separating CO₂ at high temperature and at high pressure, provided they are properly integrated into a power plant. In this study, membrane p ...
DOI:
10.1016/j.memsci.2010.10.066

7. Mixed gas separation study for the hydrogen recovery from H₂/CO/N₂/CO₂ post combustion mixtures using a Matrimid membrane

Author:
David, Oana Cristina; Gorri, Daniel; Urtiaga, Ana; Ortiz, Inmaculada
Source:
Journal of membrane science 2011 v.378 no.1-2 pp. 359-368
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; carbon monoxide; combustion; correlation; hydrogen; models; nitrogen; permeability; polymers; sorption; temperature
Abstract:
... In this work, the membrane separation of hydrogen from binary, ternary and quaternary mixtures of H₂, N₂, CO and CO₂ is presented. Hydrogen permeability through a polyimide Matrimid 5218 membrane was experimentally obtained using the constant pressure technique. The influence of the feed gas composition, temperature (30–100°C), pressure range (up to 6bar), and flow rates was experimentally analyze ...
DOI:
10.1016/j.memsci.2011.05.029

8. Post-synthesis defect abatement of inorganic membranes for gas separation

Author:
Chiu, W.V.; Park, I.-S.; Shqau, K.; White, J.C.; Schillo, M.C.; Ho, W.S.W.; Dutta, P.K.; Verweij, H.
Source:
Journal of membrane science 2011 v.377 no.1-2 pp. 182-190
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; cost effectiveness; gas chromatography; hydrogen; nitrogen; polymers; silica; temperature; zeolites
Abstract:
... Simple, fast, and cost-effective defect abatement of inorganic gas separation membranes can be achieved by application of a continuous polymer layer. This polymer diminishes defect flow and is stable at a wide range of operating conditions. In the studies presented a thin layer of polydimethyl siloxane (PDMS) was applied to defective microporous silica and zeolite Y membranes. After application of ...
DOI:
10.1016/j.memsci.2011.04.047

9. Preparation of polyaniline asymmetric hollow fiber membranes and investigation towards gas separation performance

Author:
Hasbullah, H.; Kumbharkar, S.; Ismail, A.F.; Li, K.
Source:
Journal of membrane science 2011 v.366 no.1-2 pp. 116-124
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; cyclic ethers; evaporation; gases; hydrogen; mechanical properties; molecular weight; nitrogen; oxygen; polymers; separation; spinning; synergism; synthetic fibers
Abstract:
... In this study, integrally skinned asymmetric hollow fiber membranes have been developed from emeraldine base form of polyaniline (PAni) for gas separation. High molecular weight PAni was synthesized in-house to provide the fresh supply of the polymer. The hollow fiber membranes were prepared using dry-jet wet spinning and the effects of air-gap distance on nascent fiber morphology, their gas perme ...
DOI:
10.1016/j.memsci.2010.09.050