Journal ArticleDOI
Significance of entropic selectivity for advanced gas separation membranes
Anshu Singh,William J. Koros +1 more
TLDR
In this paper, a comparison of the gas transport properties of three different classes of materials highlights the importance of ''entropic selectivity'' which has hitherto not been focused on for membrane-based separation of gases.Abstract:
Commercial polymeric gas separation membranes exhibit a trade-off between productivity and selectivity. However, on this same trade-off curve molecular sieving materials like zeolites and carbon molecular sieves (CMS) lie above the upper bound for polymers. A comparison of the gas transport properties of these three different classes of materials highlights the importance of ``entropic selectivity`` which has hitherto not been focused on for membrane-based separation of gases. A whole new generation of polymeric membrane materials may result from enhancement of entropic selectivity of polymeric membrane materials.read more
Citations
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Journal ArticleDOI
Membranes for hydrogen separation.
Nathan W. Ockwig,Tina M. Nenoff +1 more
TL;DR: Comparing H2 versus CO2 Selective Polymeric Membranes 4103 and Disadvantages of Carbon Membrane 4098 5.2.1.
Journal ArticleDOI
Pushing the limits on possibilities for large scale gas separation: which strategies?
William J. Koros,Rajiv Mahajan +1 more
TL;DR: The current spectrum of applications of gas separation membranes include: nitrogen enrichment, oxygen enrichment, hydrogen recovery, acid gas (CO2, H2S) removal from natural gas and dehydration of air and natural gas as discussed by the authors.
Journal ArticleDOI
Performance studies of mixed matrix membranes for gas separation: A review
Mohammad Ali Aroon,Mohammad Ali Aroon,Ahmad Fauzi Ismail,Takeshi Matsuura,Takeshi Matsuura,Mohammad Mehdi Montazer-Rahmati +5 more
TL;DR: In this paper, the performance studies of mixed matrix membrane (MMM) for gas separation were critically reviewed, and the materials selection and the preparation techniques of MMM were also discussed.
Journal ArticleDOI
Materials for next-generation molecularly selective synthetic membranes
William J. Koros,Chen Zhang +1 more
TL;DR: This Progress Article highlights continuing developments and identifies future opportunities in scalable membrane materials based on rigid, engineered pore structures, for both gas and liquid phase applications.
Journal ArticleDOI
Mixed matrix membranes using carbon molecular sieves: I. Preparation and experimental results
TL;DR: Carbon molecular sieves (CMSs) have been incorporated into two different polymer matrices to form mixed matrix membrane films for gas separations as mentioned in this paper, which have an intrinsic CO2/CH4 selectivity of 200 with a CO2 permeability of 44 −Barrers and an O2/N2 selectivity with 133 with an O 2 permeability at 35 −C.
References
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Journal ArticleDOI
Correlation of separation factor versus permeability for polymeric membranes
TL;DR: In this paper, an analysis of the literature data for binary gas mixtures from the list of He, H2, O2, N2, CH4, and CO2 reveals an upper bound relationship for these mixtures.
Journal ArticleDOI
Controlled Permeability Polymer Membranes
TL;DR: The complex and interacting issues involved in effectively separating commercially important gas mixtures using membranes are summarized in Figure 1 as mentioned in this paper, where the authors present a recent analysis by Stern that no materials are currently satisfactory for large scale oxygen enrichment to greater than 30 mol% in spite of significant strides in this area of materials science over the past decade.
Journal ArticleDOI
Semi-empirical investigation of the angular dependence of the interaction energy between two ground-state oxygen molecules
B. Bussery,Monique Aubert-Frécon +1 more
TL;DR: In this paper, an orientation-dependent intermolecular potential for two ground-state O 2 molecules has been determined using a modified Kihara potential function based on molecular charge distribution contours, observed second virial coefficients and long-range electrostatic quadrupolar and dispersion interactions.