Performance of commercial-size plasmapolymerized PDMS-coated hollow fiber modules in removing VOCs from N2/air

Majumdar, S.; Bhaumik, D.; Sirkar, Kamalesh K.

doi:10.1016/s0376-7388(02)00545-8

Cited by 37 publications

(17 citation statements)

References 5 publications

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“…Polyethersulfone (PES) is a good choice for integrally‐skinned asymmetric membrane preparation with desirable characteristics such as wide operating temperatures, broad pH limits, suitable strength and flexibility, appropriate flux and cheapness . Gas permeation properties of PDMS membranes have been studied by many researchers …”

Section: Introductionmentioning

confidence: 99%

PDMS coated asymmetric PES membrane for natural gas sweetening: Effect of preparation and operating parameters on performance

2014

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The present study is an attempt to investigate the effects of preparation and operation parameters on ideal and real selectivity of polydimethylsiloxane (PDMS) coated asymmetric polyethersulfone (PES) membranes for natural gas sweetening. Scanning electron microscopy (SEM) was used to study the effect of PES concentration and solvent type on membrane morphology. The effects of operating parameters on the performance of membranes were investigated by using binary CO 2 /CH 4 , H 2 S/CH 4 and ternary H 2 S/CO 2 /CH 4 gas mixtures. Higher concentrations of PES and a higher sequential coating number increase CO 2 /CH 4 selectivity and decrease CO 2 permeance. As a notable and interesting result, the membrane exhibits rubbery PDMS behaviour for H 2 S containing feeds and displays a glassy PES membrane for CO 2 /CH 4 mixed gas. An increase in the feed pressure decreases CO 2 and CH 4 permeance and increases CO 2 /CH 4 selectivity for CO 2 /CH 4 feed. For H 2 S/CH 4 and H 2 S/CO 2 /CH 4 mixed gas, enhancing the feed pressure results in higher CH 4 and lower CO 2 and H 2 S permeance and a declined CO 2 /CH 4 and H 2 S/CH 4 selectivity. Increasing temperature in binary CO 2 /CH 4 enhances CO 2 and CH 4 permeance and decreases CO 2 /CH 4 selectivity. Increasing the temperature increases CH 4 permeance and decreases H 2 S permeance for binary H 2 S/CH 4 mixture. For ternary mixture, increasing the temperature leads to a higher permeance for CO 2 and H 2 S and a lower CH 4 permeance. For binary CO 2 /CH 4 , a higher CO 2 concentration increases the membrane gas permeance and decreases CO 2 /CH 4 selectivity. Increasing the H 2 S concentration in the feed results in a reduction in gas pressure normalised flux of gases in ternary gas feed because of an increase in Flory-Huggins interaction parameter.

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Section: Introductionmentioning

confidence: 99%

PDMS coated asymmetric PES membrane for natural gas sweetening: Effect of preparation and operating parameters on performance

2014

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“…Most of the prior work on membrane vapor recovery has focused on silicone rubber-based membranes (for example, [2][3][4][5][6][7][8][9]), and the separation of organic vapor-gas mixtures is often attributed to a solution diffusion mechanism.…”

Section: Introductionmentioning

confidence: 99%

Separation of gasoline vapor from nitrogen by hollow fiber composite membranes for VOC emission control

Liu

Feng

Lawless³

2006

Journal of Membrane Science

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“…Its glass transition temperature is the lowest amongst polymers (−129 • C), indicating a very flexible polymer backbone with long-range segmental motion, which is sufficiently active, even at very low temperatures [7,8]. The permeation properties of thick PDMS films have been evaluated in laboratory for the characteristics of various pure gases, hydrocarbons and some hydrocarbons/permanent gas mixtures over a temperature range of 20-95 • C [9][10][11][12][13][14]. There are very few research articles dealing with the permeation of pure gases and especially gaseous mixtures through ultra thin asymmetric membranes for industrial separation purposes [15].…”

Section: Introductionmentioning

confidence: 99%

Silicone-coated polymeric membrane for separation of hydrocarbons and nitrogen at sub-ambient temperatures

Jiang

Kumar

2006

Journal of Membrane Science

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Permeation performances of pure and mixed nitrogen, ethylene, ethane, propylene and propane were investigated using a polydimethylsiloxane (PDMS) coated polysulfone composite membrane in the temperature range of −20 to 40 • C. The permeances and selectivities strongly depended on the temperature and feed composition at a constant pressure. Propylene and propane plasticized the PDMS coating with decreasing temperature and increasing hydrocarbon concentrations, which led to significantly high permeances for all mixed hydrocarbons. It also caused positive coupling effects for ethane, ethylene and nitrogen in the presence of propylene and propane. Moreover, pure nitrogen permeances or nitrogen permeance as a mixture component always decreased considerably by lowering the temperature. Consequently, all selectivities for the hydrocarbons to nitrogen increased significantly with the decrease of temperature and increase of total hydrocarbon concentration in feed. A systematic analysis of apparent activation energies to verify the experimental results was also presented. Crown

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Performance of commercial-size plasmapolymerized PDMS-coated hollow fiber modules in removing VOCs from N2/air

Cited by 37 publications

References 5 publications

PDMS coated asymmetric PES membrane for natural gas sweetening: Effect of preparation and operating parameters on performance

PDMS coated asymmetric PES membrane for natural gas sweetening: Effect of preparation and operating parameters on performance

Separation of gasoline vapor from nitrogen by hollow fiber composite membranes for VOC emission control

Silicone-coated polymeric membrane for separation of hydrocarbons and nitrogen at sub-ambient temperatures

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