Study of CO2 separation with PVC/Pebax composite membrane

Ahmadpour, Ehsan; Shamsabadi, Ahmad Arabi; Behbahani, Reza Mosayebi; Aghajani, Masoud; Kargari, Ali

doi:10.1016/j.jngse.2014.09.021

Cited by 68 publications

(14 citation statements)

References 20 publications

(20 reference statements)

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“…The extensive literature search reveals that many membrane gas separation studies focused on the carbon dioxide related gas separation such as CO 2 /N 2 , CO 2 /O 2 , and CO 2 /CH 4 [ 30 , 31 ]. To the best of our knowledge, there are very few studies reporting the performance of hollow fiber membranes for oxygen/nitrogen separation.…”

Section: Resultsmentioning

confidence: 99%

Preparation, Characterization, and Performance Evaluation of Polysulfone Hollow Fiber Membrane with PEBAX or PDMS Coating for Oxygen Enhancement Process

et al. 2018

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Air pollution is a widely discussed topic amongst the academic and industrial spheres as it can bring adverse effects to human health and economic loss. As humans spend most of their time at the office and at home, good indoor air quality with enriched oxygen concentration is particularly important. In this study, polysulfone (PSF) hollow fiber membranes fabricated by dry-jet wet phase inversion method were coated by a layer of polydimethylsiloxane (PDMS) or poly(ether block amide) (PEBAX) at different concentrations and used to evaluate their performance in gas separation for oxygen enrichment. The surface-coated membranes were characterized using SEM and EDX to determine the coating layer thickness and surface chemical properties, respectively. Results from the gas permeation study revealed that the PSF membrane coated with PDMS offered higher permeance and selectivity compared to the membrane coated with PEBAX. The best performing PDMS-coated membrane demonstrated oxygen and nitrogen gas permeance of 18.31 and 4.01 GPU, respectively with oxygen/nitrogen selectivity of 4.56. Meanwhile, the PEBAX-coated membrane only showed 12.23 and 3.11 GPU for oxygen and nitrogen gas, respectively with a selectivity of 3.94. It can be concluded the PDMS coating is more promising for PSF hollow fiber membrane compared to the PEBAX coating for the oxygen enrichment process.

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Section: Resultsmentioning

confidence: 99%

Preparation, Characterization, and Performance Evaluation of Polysulfone Hollow Fiber Membrane with PEBAX or PDMS Coating for Oxygen Enhancement Process

et al. 2018

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“…Additionally, as temperature increases, the energy barrier to the penetrant decreases, allowing for faster diffusion. Furthermore, the diffusion coefficient usually increases sharply with temperature, and a rising temperature impedes polymer crystallization and morphological changes, at high temperatures . Crystals act as impermeable barriers to the gas molecules and lower the permeability.…”

Section: Resultsmentioning

confidence: 99%

Novel Application of a Polyurethane Membrane for Efficient Separation of Hydrogen Sulfide from Binary and Ternary Gas Mixtures

et al. 2018

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Recently we introduced a new polyurethane (PU) membrane synthesized from polypropylene glycol (PPG), hexamethylene diisocyanate (HDI), and 1, 4-butane diol (BDO), and then studied the performance of the membrane for CO 2 removal. This paper presents a novel application of the PPG-HDI-BDO membrane for separation of H 2 S in binary and ternary gas mixtures. The gas transport properties of the membrane in binary H 2 S/CH 4 and ternary CH 4 /CO 2 /H 2 S gas mixtures at different temperatures, pressures, and gas compositions are investigated. Permeation tests show that the membrane has a high H 2 S/CH 4 selectivity (27.2), an outstanding H 2 S permeability of 790 Barrer, and a remarkable CO 2 permeability of 473 Barrer. The H 2 S permeability of 790 Barrer is the highest reported to this date for all PU membranes. The H 2 S permeability and H 2 S/ CH 4 selectivity of the membrane increases with temperature. As the operating pressure increases, the CO 2 /CH 4 and H 2 S/CH 4 selectivities of the membrane increases. H 2 S and CO 2 permeabilities and H 2 S/CH 4 and CO 2 /CH 4 selectivities increase, as the H 2 S content of the feed increases. Solubility is most likely the dominant mechanism of gas permeation in this membrane. As the CO 2 content of the feed stream increases, the H 2 S permeability and H 2 S/CH 4 selectivity of the membrane decreases. The membrane has maximum H 2 S/CH 4 selectivities of 27.4 in binary H 2 S/CH 4 (with 0.075 mol% H 2 S) and 27.2 in ternary CH 4 /CO 2 /H 2 S (with 0.66 mol% H 2 S).[a] Dr.

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“…The performance of a membrane, in addition to its material, depends on the procedures of its preparation. Recent advances in this regards are based on two strategies: (1) using inorganic or organic additives in the polymer matrix to improve the separation properties, and (2) preparation of multilayer composite membranes to improve the characteristics of the resultant membrane . This can be done by several methods, such as casting, dip coating, interfacial polymerization, extrusion, pouring, and press method …”

Section: Introductionmentioning

confidence: 99%

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

Afshoun

Chenar

Moradi

et al. 2019

J of Applied Polymer Sci

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Enhancing the performance of gas separation membranes is one of the major concerns of membrane researchers. Thus, in this study, poly(ether-block-amide) (Pebax)/polyetherimide (PEI) thin-film composite membranes were prepared and their CO 2 /CH 4 gas separation performance was investigated by means of pure and mixed gases permeation tests. To improve the properties of these membranes, halloysite nanotubes (HNT) were added to Pebax layer at different loadings of 0.5, 1, 2, and 5 wt % to form Pebax-HNT/PEI membranes. Scanning electron microscopy, gas sorption, X-ray diffraction, Fourier-transform infrared, and differential scanning calorimetry tests were also performed to investigate the impact of HNT on structure and properties of prepared membranes. Results showed that both CO 2 /CH 4 selectivity and CO 2 permeance increased by adding HNT to Pebax layer up to 2 wt %. By increasing HNT loading to 5 wt %, the CO 2 /CH 4 selectivity decreased from 32 to 18, while CO 2 permeance increased from 3.25 to 4.2 GPU. Pebax/PEI and Pebax-HNT/PEI membranes containing 2 wt % of HNT were tested using CO 2 / CH 4 gas mixtures at different feed CO 2 concentrations and feed pressure of 4 bar. The results showed that with increasing CO 2 concentration from 20 to 80 vol %, CO 2 /CH 4 selectivity of Pebax/PEI composite membranes increased by 19%, while, in Pebax-HNT/PEI membrane, CO 2 / CH 4 selectivity decreased by 40%.

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Study of CO2 separation with PVC/Pebax composite membrane

Cited by 68 publications

References 20 publications

Preparation, Characterization, and Performance Evaluation of Polysulfone Hollow Fiber Membrane with PEBAX or PDMS Coating for Oxygen Enhancement Process

Preparation, Characterization, and Performance Evaluation of Polysulfone Hollow Fiber Membrane with PEBAX or PDMS Coating for Oxygen Enhancement Process

Novel Application of a Polyurethane Membrane for Efficient Separation of Hydrogen Sulfide from Binary and Ternary Gas Mixtures

Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes

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Study of CO2 separation with PVC/Pebax composite membrane

Cited by 68 publications

References 20 publications

Preparation, Characterization, and Performance Evaluation of Polysulfone Hollow Fiber Membrane with PEBAX or PDMS Coating for Oxygen Enhancement Process

Preparation, Characterization, and Performance Evaluation of Polysulfone Hollow Fiber Membrane with PEBAX or PDMS Coating for Oxygen Enhancement Process

Novel Application of a Polyurethane Membrane for Efficient Separation of Hydrogen Sulfide from Binary and Ternary Gas Mixtures

Effects of halloysite nanotubes on the morphology and CO2/CH4 separation performance of Pebax/polyetherimide thin‐film composite membranes

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Effects of halloysite nanotubes on the morphology and CO₂/CH₄ separation performance of Pebax/polyetherimide thin‐film composite membranes