U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Journal Journal of membrane science Remove constraint Journal: Journal of membrane science Source 2011 v.383 no.1-2 Remove constraint Source: 2011 v.383 no.1-2 Subject artificial membranes Remove constraint Subject: artificial membranes Subject hydrogen Remove constraint Subject: hydrogen
Start Over

Search

6  Search Results

1 - 6 of 6
Number of results to display per page

Search Results

1. Development of thin binary and ternary Pd-based alloy membranes for use in hydrogen production

Author:
Peters, T.A.; Kaleta, T.; Stange, M.; Bredesen, R.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 124-134
ISSN:
0376-7388
Subject:
X-ray diffraction; activation energy; alloys; artificial membranes; copper; hydrogen; hydrogen production; manufacturing; molybdenum; permeability; temperature
Abstract:
... The manufacturing, characterisation, and H₂ permeation properties of thin membranes of a variety of binary Pd–Cu (∼5–53at.% Cu), Pd–TM (∼5at.% TM=Au, Ru, Mo, Ta, Nb, Y), and ternary Pd–Cu–TM alloys (base alloy∼Pd₇₀Cu₃₀ where Cu is replaced by various amounts of TM) prepared by magnetron sputtering are reported. From the XRD characterisation it can be concluded that all the membranes prepared by ma ...
DOI:
10.1016/j.memsci.2011.08.050

2. 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

3. Gas transport and free volume in hexafluoropropylene polymers

Author:
Belov, N.A.; Zharov, A.A.; Shashkin, A.V.; Shaikh, M.Q.; Raetzke, K.; Yampolskii, Yu.P.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 70-77
ISSN:
0376-7388
Subject:
artificial membranes; composite polymers; diffusivity; hydrogen; oxygen; permeability; solubility; sorption; spectroscopy
Abstract:
... Amorphous perfluorinated polymers reveal interesting gas permeation and sorption properties. However, the number of the polymers of this class described in literature is limited. In this work, synthesis and physicochemical properties of two novel perfluorinated polymers: poly(hexafluoropropylene) (PHFP) and the copolymer of hexafluoropropylene (90wt.%) and perfluoromethylvinyl ether (10wt.%) (copo ...
DOI:
10.1016/j.memsci.2011.08.029

4. 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

5. Maxwell–Stefan modeling of slowing-down effects in mixed gas permeation across porous membranes

Author:
Krishna, Rajamani; van Baten, Jasper M.
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 289-300
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; coordination polymers; diffusivity; equations; glass; hydrogen; methane; models; molecular dynamics; sorption isotherms; zeolites
Abstract:
... Micro- and meso-porous materials such as zeolites, metal-organic frameworks (MOFs), covalent-organic frameworks (COFs), zeolitic imidazolate frameworks (ZIFs), Vycor glass, MCM-41, and SBA-15 are used in membrane separation in a wide variety of applications such as CO₂ capture. For process development and design purposes the Maxwell–Stefan (M–S) equations are widely used for modeling mixed gas per ...
DOI:
10.1016/j.memsci.2011.08.067

6. Pore-size-controlled silica membranes with disiloxane alkoxides for gas separation

Author:
Lee, Hye Ryeon; Shibata, Toshinobu; Kanezashi, Masakoto; Mizumo, Tomonobu; Ohshita, Joji; Tsuru, Toshinori
Source:
Journal of membrane science 2011 v.383 no.1-2 pp. 152-158
ISSN:
0376-7388
Subject:
artificial membranes; catalysts; ethane; hydrogen; porosity; powders; silica gel
Abstract:
... Pore-size-controlled silica membranes were prepared using hexaethoxy disiloxane (HEDS) by a “spacer” technique, which is a novel strategy to control the pore size of silica membranes using bridged alkoxides. HEDS-derived silica gel powders prepared with acid and base catalysts were microporous and mesoporous, respectively. HEDS-derived silica membranes prepared from HCl-catalyzed sol showed high H ...
DOI:
10.1016/j.memsci.2011.08.046