Performance of silicone-coated polymeric membrane in separation of hydrocarbons and nitrogen mixtures

Jiang, Xin; Kumar, Ashwani

doi:10.1016/j.memsci.2004.12.041

Cited by 63 publications

(50 citation statements)

References 24 publications

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“…Effect of pressure difference on the pure and mixed gas selectivities. tivities in the mixtures in the entire pressure difference range as reported in our previous work on PDMS coated membrane [7].…”

Section: Voc-n 2 Gas Separationmentioning

confidence: 59%

“…However, it is limited in mechanical strength and selectivity particularly for highly condensable hydrocarbons in admixture with permanent gases [4][5][6]. For example, our previous work [7,8] showed that PDMS coated membrane can be plasticized by propane and propylene, resulting in significant permeance increases for both hydrocarbons and nitrogen in a quaternary mixture of propane, propylene, ethylene and nitrogen, therefore, the selectivities of hydrocarbons to nitrogen were not as high as expected. Polyurethane copolymers combine rigid hard segment and flexible soft segment, which offer a wide range of variability in structure and properties [9].…”

Section: Introductionmentioning

confidence: 93%

“…All permeances and selectivities of thin film composite membranes were determined by a standard constant-pressure apparatus as described in our previous work [7] at room temperature for pure gases and binary gas mixtures. Flow-rates were measured by the mass flow controllers/meters (MKS Instruments), which gave nitrogen equivalent standard volumes.…”

Section: Gas Permeation Measurementmentioning

confidence: 99%

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Polyurethane–poly(vinylidene fluoride) (PU–PVDF) thin film composite membranes for gas separation

Jiang

Ding

Kumar

2008

Journal of Membrane Science

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Aqueous polyurethane dispersions (PUDs) with poly(dimethylsiloxane) (PDMS), or mixed poly (dimethylsiloxane)/poly(ethylene glycol) (PDMS/PEG) as the soft segment were synthesized, and made into thin films for characterization with differential scanning calorimetry (DSC), thermogarvimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), size exclusion chromatography (SEC) and transmission electron microscopy (TEM). Seven thin film composite (TFC) membranes prepared on PUDs and PVDF substrates were evaluated by the separation of air as well as hydrocarbon-nitrogen mixtures. A promising membrane was then selected for further investigation of the morphological structure and permselectivities, using pure gases and binary mixtures of ethylene, ethane, propylene and propane with nitrogen at ambient temperature. It was found that PDMS/PEG-based PU membrane was typically solubility-selective for condensable hydrocarbons, and nitrogen permeance was marginally enhanced in hydrocarbon-nitrogen mixtures. It appears that the copolymer membrane with both urethane and PEG segments can effectively tolerate the swelling caused by the condensable gases. As a result, the selectivities of propylene and propane to nitrogen were substantially improved, e.g., in a mixture containing 28% propylene and 72% nitrogen, the selectivity of propylene to nitrogen reached 29.2 with a propylene permeance of 34.4 gas permeation unit (GPU).Crown

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Section: Voc-n 2 Gas Separationmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 93%

Section: Gas Permeation Measurementmentioning

confidence: 99%

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Polyurethane–poly(vinylidene fluoride) (PU–PVDF) thin film composite membranes for gas separation

Jiang

Ding

Kumar

2008

Journal of Membrane Science

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“…Among the rubbery polymers, poly(dimethylsiloxane) (PDMS) was reported to be a solubility selective polymer that is more permeable to condensable vapors than noncondensable gases [3]. It is well-known that the performances of a pressure-driven membrane separation depends on both the membrane characteristics and the transport phenomena occurring adjacent to the feed and permeate side of the membrane.…”

Section: Introductionmentioning

confidence: 99%

“…An implementation of these models to membrane may ignore the effects of the permeation rate on the velocity and concentration profiles in the fluid phase contiguous to the membrane surface. Moreover, in the case of gas separation systems, it has always been difficult to predict the mixing of the interacting gas species on the permeate side [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Hydrocarbon Enrichment of Process Gas Mixtures by Permeation through Polymeric Membranes

2007

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In membrane-based gaseous separations, a consensus on the distribution of the components of the permeate stream in the immediate membrane vicinity has yet to be reached and the possibility of an underestimation of selective gas permeance due to lack of gas mixing on the permeate side exists. In this work, a numerical study of the permeation of ethylene and propylene in their binary mixtures with nitrogen through a composite poly(dimethylsiloxane) coated polysulfone membrane was performed. Continuity and momentum equations, along with gas compressibility and permeance properties for individual species of the gas mixture, were introduced into a comprehensive computational fluid dynamics (CFD) model. Simulation results showed that irrespective of the stage-cut, gases with higher selectivity were well mixed in the vicinity of the membrane on the permeate side.

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Hydrophobic‐functionalized ZIF‐8 nanoparticles incorporated PDMS membranes for high‐selective separation of propane/nitrogen

Yuan

Shen

et al. 2016

Asia-Pacific J Chem Eng

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It is still a great challenge to prepare high performance mixed matrix membranes (MMMs) because of the difficulty in finely tuning the compatibility between filler and organic phases. In this work, ZIF‐8 nanoparticles hydrophobically functionalized by 5, 6‐dimethylbenzimidazole (DMBIM) via shell ligand exchange (SLE) reaction were incorporated into polydimethylsiloxane (PDMS) matrix to fabricate defect‐free MMMs. Organic‐–inorganic interface compatibility was realized because of more abundant organic ligands from DMBIM. The effects of different loadings on membrane microstructure and gas separation performance were investigated systematically. A significantly enhanced C3H8/N2 separation performance with C3H8 permeability over 2.10 × 104 Barrer (91 % higher than that of pure PDMS membrane) and C3H8/N2 selectivity of 99.5 (116 % higher than that of pure PDMS membrane) were achieved. Additionally, the as‐prepared membrane also exhibited excellent stability during long term operation. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.

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Performance of silicone-coated polymeric membrane in separation of hydrocarbons and nitrogen mixtures

Cited by 63 publications

References 24 publications

Polyurethane–poly(vinylidene fluoride) (PU–PVDF) thin film composite membranes for gas separation

Polyurethane–poly(vinylidene fluoride) (PU–PVDF) thin film composite membranes for gas separation

Numerical Investigation of Hydrocarbon Enrichment of Process Gas Mixtures by Permeation through Polymeric Membranes

Hydrophobic‐functionalized ZIF‐8 nanoparticles incorporated PDMS membranes for high‐selective separation of propane/nitrogen

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