Natural gas sweetening using a cellulose triacetate hollow fiber membrane illustrating controlled plasticization benefits

Liu, Yang; Liu, Zhongyun; Morisato, Atsushi; Bhuwania, Nitesh; Chinn, Daniel; Koros, William J.

doi:10.1016/j.memsci.2020.117910

Cited by 53 publications

(34 citation statements)

References 31 publications

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“…The test temperature was 30 C, and the pressure was 0.01 MPa. The calculation of gas permeability followed eqn (2).…”

Section: Characterizationmentioning

confidence: 99%

“…Membrane separation has many advantages, such as simple process, high efficiency, saving energy consumption, low cost and space-efficient, and has exhibited broad application prospects, including hydrogen purication, CO 2 capture in natural gas, gas dehumidication, organic mixed gas separation and recovery. [1][2][3] At present, the commercial gas separation membranes are mainly polymeric membranes, involving cellulose acetate (CA), polyphenylene ether (PEO), polyimide (PI), etc. [4][5][6] These separation membranes rely on a close packed structure and appropriate chain rigidity to form tiny gas transmission channels, so they usually display high separation selectivities but low gas permeabilities.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced gas separation and mechanical properties of fluorene-based thermal rearrangement copolymers

Zhang

Xiao

et al. 2021

RSC Adv.

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“…The test temperature was 30 C, and the pressure was 0.01 MPa. The calculation of gas permeability followed eqn (2).…”

Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced gas separation and mechanical properties of fluorene-based thermal rearrangement copolymers

Zhang

Xiao

et al. 2021

RSC Adv.

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show abstract

“…Several research papers were found regarding the fabrication and investigation of gas transport properties of different CAs membranes (CMA, CDA, and CTA) [13][14][15][16][17][18][19][20][21][22][23][24]. Houde et al studied the effect of exposing the CDA membrane to high pressure CO 2 prior to the permeability measurements.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, two important publications may reignite the interests in CA membranes for CO 2 separation. One of them was from Koros and his coworkers who investigated the plasticization phenomena of a commercial CTA membrane provided by Cameron, a Schlumberger Company for natural gas sweetening [ 23 ]. The membrane not only possessed an attractive CO 2 permeance and CO 2 /CH 4 selectivity but also exhibited high tolerance against aromatic contents.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Blended Membranes of Cellulose Acetate with Variable Degree of Acetylation for CO2/CH4 Separation

et al. 2021

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The separation and capture of CO2 have become an urgent and important agenda because of the CO2-induced global warming and the requirement of industrial products. Membrane-based technologies have proven to be a promising alternative for CO2 separations. To make the gas-separation membrane process more competitive, productive membrane with high gas permeability and high selectivity is crucial. Herein, we developed new cellulose triacetate (CTA) and cellulose diacetate (CDA) blended membranes for CO2 separations. The CTA and CDA blends were chosen because they have similar chemical structures, good separation performance, and its economical and green nature. The best position in Robeson’s upper bound curve at 5 bar was obtained with the membrane containing 80 wt.% CTA and 20 wt.% CDA, which shows the CO2 permeability of 17.32 barrer and CO2/CH4 selectivity of 18.55. The membrane exhibits 98% enhancement in CO2/CH4 selectivity compared to neat membrane with only a slight reduction in CO2 permeability. The optimal membrane displays a plasticization pressure of 10.48 bar. The newly developed blended membranes show great potential for CO2 separations in the natural gas industry.

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“…Cellulose derivatives in the form of cellulose acetates (CA) have dominated the commercial market for polymer membranes over the last decades (Baker & Lokhandwala, 2008;Basu, Khan, Cano-Odena, Liu, & Vankelecom, 2010;Esposito et al, 2019;Galizia et al, 2017;Liskey et al, 2018;Liu et al, 2020). Their good thermal properties, charac terised by moderately high glass transition and initial decomposition temperatures, also enable CA application in processes with elevated temperatures, e.g.…”

Section: Introductionmentioning

confidence: 99%

Influence of ionic liquid-like cationic pendants composition in cellulose based polyelectrolytes on membrane-based CO2 separation

Nikolaeva

Verachtert

Azcune

et al. 2021

Carbohydrate Polymers

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Cellulose acetate (CA) is an attractive membrane polymer for CO2 capture market. However, its low CO2 pe1meability hampers its application as part of a membrane for most relevant types of CO 2 containing feeds. This work investigates the enhancement of CA separation performance by incorporating ionic liquid-like pendants (1methylimidazol, 1-methylpyrrolidine, and 2-hydroxyethyldimethylamine (HEDMA) on the CA backbone. These CA-based polyelectrolytes (PEs), synthesised by covalent grafting of cationic pendants with anion metathesis, were characterised by NMR, FfIR, DSC/TGA, and processed into thin-film composite membranes. The membrane performance in C0 2 /N 2 mixed-gas permeation experiments shows a decrease in CO 2 and N 2 permeability and an initial decrease and then gradual increase in C0 2 /N 2 selectivity with increasing HEDMA conrenr. The an1otmt of HEDMA attached to the CA backbone determines overall separation process in bifunctional PEs. This indicates that the hydroxy-substituted cationic pendants alter interactions between PEs network and permeating CO2 molecules, suggesting possibilities for further improvements.

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Natural gas sweetening using a cellulose triacetate hollow fiber membrane illustrating controlled plasticization benefits

Cited by 53 publications

References 31 publications

Enhanced gas separation and mechanical properties of fluorene-based thermal rearrangement copolymers

Enhanced gas separation and mechanical properties of fluorene-based thermal rearrangement copolymers

Performance Analysis of Blended Membranes of Cellulose Acetate with Variable Degree of Acetylation for CO2/CH4 Separation

Influence of ionic liquid-like cationic pendants composition in cellulose based polyelectrolytes on membrane-based CO2 separation

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