Composite Hollow Fiber Membranes for Gas Separation: The Resistance Model Approach

Henis, J. M. S.; Tripodi, Mary K.

doi:10.1007/978-1-4613-3371-5_6

Cited by 71 publications

(101 citation statements)

References 1 publication

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“…The asymmetric membrane is laminated with a thin, homogeneous PDMS (polydimethylsiloxane) membrane to prevent the gas leak through the defects in the skin layer of the substrate asymmetric membrane and force the gas to permeate through the polymer matrix in the skin layer. Although coating would have a similar effect [10], the lamination method is far easier to apply on the fiat sheet membranes and the results are more reproducible.…”

Section: Introductionmentioning

confidence: 99%

Effect of gelation conditions on gas separation performance for asymmetric polysulfone membranes

Yamasaki

Tyagi

Fouda

et al. 1997

Journal of Membrane Science

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Effect of gelation conditions on gas separation performance for asymmetric polysulfone membranes Yamasaki, A.; Tyagi, R. K.; Fouda, A. E.; Matsuura, T.; Jonasson, K. Received 7 December 1995; revised 4 July 1996; accepted 5 July 1996 Abstract Asymmetric gas separation membranes were prepared by the phase inversion technique under different gelation conditions from polysulfone/N,N-dimethylacetamide (DMAc) solutions. The dual bath method was employed to control the skin layer properties: the cast film was immersed in 2-propanol bath and water bath in sequence. The membranes were characterized by the permeance of oxygen and nitrogen gases and the observation with scanning electron microscopy (SEM). A thin layer of silicone rubber (PDMS) was laminated on the surface of each asymmetric polysulfone membrane to eliminate the effect of defects in the skin layer. The oxygen permeance was inversely proportional to the square root of immersion time in the first (2-propanol) bath. The skin layer thickness determined by SEM observation increased with an increase in the immersion time in the first bath. For a given immersion time, the oxygen permeance decreased with an increase in the polymer concentration in the casting solution. Selectivity of oxygen over nitrogen also depended both on the immersion time in the first bath and the polymer concentration.

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Section: Introductionmentioning

confidence: 99%

Effect of gelation conditions on gas separation performance for asymmetric polysulfone membranes

Yamasaki

Tyagi

Fouda

et al. 1997

Journal of Membrane Science

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“…Hennis and Tripodi [63] stated that is rather difficult to achieve an adequate thin selective layer without defects: several dipping-drying-carbonization cycles are required to obtain CMSMs without defects. In order to reduce cost, methods for preparing supported membranes in only one dip-dry-carbonization cycle should be developed.…”

Section: Supported Cmsms Prepared By One Dip-dry-carbonization Cyclementioning

confidence: 99%

Recent Advances on Carbon Molecular Sieve Membranes (CMSMs) and Reactors

Tanco

Tanaka

2016

Processes

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Carbon molecular sieve membranes (CMSMs) are an important alternative for gas separation because of their ease of manufacture, high selectivity due to molecular sieve separation, and high permeance. The integration of separation by membranes and reaction in only one unit lead to a high degree of process integration/intensification, with associated benefits of increased energy, production efficiencies and reduced reactor or catalyst volume. This review focuses on recent advances in carbon molecular sieve membranes and their applications in membrane reactors.

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“…All of these processes employ asymmetric or composite polymer membranes (Stern, 1994). These applications have come on the heels of 20 years of intensive research that saw the development of asymmetric membranes that exhibited high fluxes (Loeb, 1963), a method for the synthesis of robust hollow fibers (Vos, 1969), and a method for the casting of ultrathin, high-permeability, nonporous polymer films onto existing membranes (Ward, 1976) [subsequently improved upon and commercialized by Monsanto (Henis, 1981;Henis, 1980)]. Commercial membranebased nitrogen production processes, for example, predominantly utilize hollow-fiber membrane configurations instead of plate-and-frame or spiral-wound.…”

Section: Air/voc Separation Module Module Typementioning

confidence: 99%

Membrane-Mediated Extraction and Biodegradation of Volatile Organic Compounds From Air

Peretti¹,

Shepherd²,

Clayton³

et al. 2005

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Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. iii iv ForewordThe U.S. Environmental Protection Agency (EPA) is charged by Congress with protecting the Nation's land, air, and water resources. Under a mandate of national environmental laws, the Agency strives to formulate and implement actions leading to a compatible balance between human activities and the ability of natural systems to support and nurture life. To meet this mandate, EPA's research program is providing data and technical support for solving environmental problems today and building a science knowledge base necessary to manage our ecological resources wisely, understand how pollutants affect our health, and prevent or reduce environmental risks in the future.The National Risk Management Research Laboratory (NRMRL) is the Agency's center for investigation of technological and management approaches for preventing and reducing risks from pollution that threaten human health and the environment. The focus of the Laboratory's research program is on methods and their cost-effectiveness for prevention and control of pollution to air, land, water, and subsurface resources; protection of water quality in public water systems; remediation of contaminated sites, sediments and ground water; prevention and control of indoor air pollution; and restoration of ecosystems. NRMRL collaborates with both public and private sector partners to foster technologies that reduce the cost of compliance and to anticipate emerging problems. NRMRL's research provides solutions to environmental problems by: developing and promoting technologies that protect and improve the environment; advancing scientific and engineering information to support regulatory and policy decisions; and providing the technical support and information transfer to ensure implementation of environmental regulations and strategies at the national, state, and community levels.This publication has been produced as part of the Laboratory's strategic long-term research plan. It is published and made available by EPA's Office of Research and Development to assist the user community and to link researchers with their clients.Sally Gutierrez, Acting Director National Risk Management Research Laboratory v EPA Review NoticeThis report has been peer an...

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Composite Hollow Fiber Membranes for Gas Separation: The Resistance Model Approach

Cited by 71 publications

References 1 publication

Effect of gelation conditions on gas separation performance for asymmetric polysulfone membranes

Effect of gelation conditions on gas separation performance for asymmetric polysulfone membranes

Recent Advances on Carbon Molecular Sieve Membranes (CMSMs) and Reactors

Membrane-Mediated Extraction and Biodegradation of Volatile Organic Compounds From Air

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