Mixed gas transport study through polymeric membranes

Dhingra, Sukhtej S; Marand, Eva

doi:10.1016/s0376-7388(97)00285-8

Cited by 86 publications

(56 citation statements)

References 24 publications

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“…8. The decrease in the CO 2 permeance by increasing CO 2 concentrations in the feed gas mixture was also observed by others [27][28][29]. As the feed pressure is constant at 827 kPa (120 psig) the slight decrease in the permeance might be attributed to the CO 2 adsorption coverage as illustrated elsewhere [27].…”

Section: Case Study For Co 2 /Ch 4 Separation Using Four Semi-ipn Peisupporting

confidence: 70%

“…Labels correspond to the sample number listed in Table 2. membranes than those for s 4 and s 10 membranes while it has a greater influence on the gas permeance for s 4 and s 10 membranes than those for s 2 and s 3 membranes. Dhingra [28] reported that the change in CO 2 feed concentration in CO 2 and CH 4 mixture has an influence on gas transport characteristics for glassy polymers but not for rubbery polymers. Although performance of s 4 and s 10 membranes is controlled by the gas transport characteristics of silicon rubber, the performance of these membranes is not independent of CO 2 feed concentration as reported by Dhingra [28].…”

Section: Case Study For Co 2 /Ch 4 Separation Using Four Semi-ipn Peimentioning

confidence: 99%

“…Dhingra [28] reported that the change in CO 2 feed concentration in CO 2 and CH 4 mixture has an influence on gas transport characteristics for glassy polymers but not for rubbery polymers. Although performance of s 4 and s 10 membranes is controlled by the gas transport characteristics of silicon rubber, the performance of these membranes is not independent of CO 2 feed concentration as reported by Dhingra [28]. It appears that the behavior of silicon rubber as an ultra-thin film or when it is inside a confined space (nanoscale free volume in the glassy polymer) is different from the behavior of thick film of silicon rubber.…”

Section: Case Study For Co 2 /Ch 4 Separation Using Four Semi-ipn Peimentioning

confidence: 99%

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Performance of PEI/BMI semi-IPN membranes for separations of various binary gaseous mixtures☆

Kurdi

Kumar

2007

Separation and Purification Technology

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Synthesis of polyetherimide-bismaleimide (PEI-BMI) semi-interpenetrating polymer networks (semi-IPNs) combined with solvent phase inversion was used to prepare asymmetric flat membranes, which were coated with silicon rubber. These membranes were evaluated for production of O 2 -enriched air and separation of CO 2 from its mixture with CH 4 as well as with N 2 . Using different preparation schemes membranes with varying skin and supported layer characteristics were prepared. These different morphologies of membranes were responsible for a trade-off performance between gas permeance and permselectivity. These new composite, PEI-BMI semi-IPN membranes showed suitable performance for production of O 2 -enriched air and separation of CO 2 from natural gas or flue gas relevant to greenhouse gas emission control. Membrane performance was explained in terms of the intrinsic gas transport properties of the coated silicon layer and membrane glassy material, which determine the limitations of permeance-permselectivity trade-off. It was also found that the permselectivity for CO 2 over CH 4 or N 2 increases with increasing CO 2 feed concentration. This might be exploited to arrange for more cost-efficient multistage gas separation systems. Crown

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Section: Case Study For Co 2 /Ch 4 Separation Using Four Semi-ipn Peisupporting

confidence: 70%

Section: Case Study For Co 2 /Ch 4 Separation Using Four Semi-ipn Peimentioning

confidence: 99%

Section: Case Study For Co 2 /Ch 4 Separation Using Four Semi-ipn Peimentioning

confidence: 99%

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Performance of PEI/BMI semi-IPN membranes for separations of various binary gaseous mixtures☆

Kurdi

Kumar

2007

Separation and Purification Technology

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“…However, the study of the transport mechanisms also requires information about the evolution of D and S with these parameters (Costello and Koros, 1993;Dhingra and Marand, 1998;Thundyil et al, 1999). The dimension of the permeability coefficient is: volume of gas (STP)/(length·time·pressure) or: cm 3 gas (STP)/(cm·s·MPa).…”

Section: The Permeabilitymentioning

confidence: 99%

Transport Properdines of Gases in Polymers: Bibliographic Review

Klopffer

Flaconnèche

2001

Oil & Gas Science and Technology - Rev. IFP

244

196

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Résumé -Transport de molécules gazeuses dans les polymères : revue bibliographique -Après quelques rappels concernant les lois classiques des phénomènes de transport, cet article, purement bibliographique, présente les différents modèles théoriques proposés pour décrire le mécanisme de transport d'espèces chimiques dans les polymères par diffusion moléculaire. Il s'appuiera ensuite sur de nombreuses études menées antérieurement, pour montrer que la perméabilité des gaz (ou vapeurs organiques) dépend fortement de la structure du polymère (cristallinité, histoire thermomécanique), de la taille et de la nature du pénétrant ainsi que des conditions de température et de pression.Mots-clés : polymère, gaz, perméabilité, diffusion, solubilité. Abstract -Transport Properties of Gases in

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“…The gaseous oxygen and nitrogen market is dominated by cryogenic distillation of air, and vacuum swing adsorption (Koros et al, 2000). Of the non -cryogenic methods, selective adsorption on zeolites and carbon adsorbents are available (Lin & Guthrie, 2006), and more and more attention is attracted to the membrane separation techniques (Dhingra & Marand, 1998) . The success of polymeric membranes has been largely based on their mechanical and thermal stability, along with good gas separation properties.…”

Section: Gas Separationmentioning

confidence: 99%