High Efficiency Gas Permeability Membranes from Ethyl Cellulose Grafted with Ionic Liquids

Xu, Jingyu; Jia, Hongge; Yang, Nan; Wang, Qingji; Yang, Guohui; Zhang, Mingyu; Xu, Shuangping; Zang, Yu; Ma, Liqun; Jiang, Pengfei; Zhou, Hailiang; Wang, Honghan

doi:10.3390/polym11111900

Cited by 26 publications

(13 citation statements)

References 36 publications

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“…Different materials (organic and inorganic) were tested for CO 2 separation [75,76]. A commonly used cellulose acetate, polyimides, fluorinated polyimides, polyether-urethaneurea, polyether-block-amide show low permeability in the range from 2.4 to 212 and low ideal CO 2 /N 2 selectivity (α CO2/N2 ) in the range from 12.5 to 36.7 [77][78][79][80][81][82].…”

Section: Membrane Separationmentioning

confidence: 99%

Comparison of CO2 Separation Efficiency from Flue Gases Based on Commonly Used Methods and Materials

Ziobrowski

Rotkegel

2022

Materials

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The comparison study of CO2 removal efficiency from flue gases at low pressures and temperatures is presented, based on commonly used methods and materials. Our own experimental results were compared and analyzed for different methods of CO2 removal from flue gases: absorption in a packed column, adsorption in a packed column and membrane separation on polymeric and ceramic membranes, as well as on the developed supported ionic liquid membranes (SILMs). The efficiency and competitiveness comparison of the investigated methods showed that SILMs obtained by coating of the polydimethylsiloxane (PDMS) membrane with 1-ethyl-3-methylimidazolium acetate ([Emim][Ac]) exhibit a high ideal CO2/N2 selectivity of 152, permeability of 2400 barrer and long term stability. Inexpensive and selective SILMs were prepared applying commercial membranes. Under similar experimental conditions, the absorption in aqueous Monoethanolamine (MEA) solutions is much faster than in ionic liquids (ILs), but gas and liquid flow rates in packed column sprayed with IL are limited due to the much higher viscosity and lower diffusion coefficient of IL. For CO2 adsorption on activated carbons impregnated with amine or IL, only a small improvement in the adsorption properties was achieved. The experimental research was compared with the literature data to find a feasible solution based on commercially available methods and materials.

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Section: Membrane Separationmentioning

confidence: 99%

Comparison of CO2 Separation Efficiency from Flue Gases Based on Commonly Used Methods and Materials

Ziobrowski

Rotkegel

2022

Materials

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“…Such derivatives are the products of esterification or etherification of hydroxyl in cellulose macromolecules, 69 and some have been used as membrane materials, such as cellulose acetate (CA), cellulose acetate butyrate (CAB), 81 hydroxyethyl cellulose (HEC), 82 cellulose triacetate (CTA), 83 and ethyl cellulose (EC). 84 CA, the most common and promising cellulose derivative, can be produced by treating cellulose with acetic acid, acetic anhydride, and sulfuric acid as a catalyst. 85 It can be dissolved in many common organic solvents, such as acetic acid, acetone, DMAc, and DMF.…”

Section: Manufacturingmentioning

confidence: 99%

Toward the Next Generation of Sustainable Membranes from Green Chemistry Principles

Xie

Tiraferri

et al. 2020

ACS Sustainable Chem. Eng.

131

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Large-scale membrane technology has been widely implemented and rapidly growing for roughly 40 years. However, considering its entire life cycle, there are aspects being characterized by low sustainability, and this industry certainly cannot be defined as green. In the membrane manufacturing process, raw materials mainly rely on nonbiodegradable petroleum-based polymers and hazardous solvents. These materials are thus associated with the energy crisis and with disposal burdens at the end of their lifetime, and they pose risks to workers and the environment. Therefore, biobased polymers and green solvents should be employed within the membrane preparation process and replace traditional ones. Moreover, the wastewater generated from membrane fabrication processes contains an important amount of organic solvents and should be efficiently treated or recycled before discharge. The application of artificial intelligence in membrane manufacturing and use processes can also improve efficiency significantly. Finally, a large number of spent membrane elements should also be reused and recovered, rather than landfilled. This review critically evaluates the recent advances in methods to improve the sustainability of membrane technology, specifically emphasizing the progresses made, with regard to the above aspects. This review thus analyzes the needs for membrane industry transformations in the light of circular economy.

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“…In addition, ethyl cellulose molecules contain a large number of ether-oxygen bonds that can reversibly interact with CO 2 , thus facilitating the improvement of CO 2 permeability. [19] In addition, ethyl cellulose has the advantages of stable chemical properties, good film formation and excellent mechanical properties. [20] These properties also promote the application of ethyl cellulose in gas separation membranes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of High‐Strength and High‐Permeability EC/PI/MOF Mixed Matrix Membrane**

Zhang

Jia

et al. 2022

ChemistrySelect

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Gas separation technology is one of the difficulties in the chemistry and purification industry. To help solve this problem, we have prepared mixed matrix membranes containing Zrbased metal-organic framework (MOF), ethyl cellulose (EC) and polyimide (PI), and characterized them by FTIR, SEM and gas separation measures. The obtained mixed matrix membranes have good mechanical and thermal properties, the tensile strength of mixed matrix membranes improved by 5.44-10.5 times compared to pure EC membrane. Especially, the mixed matrix membranes exhibited excellent CO 2 permeability compared to pure EC and pure PI membranes. CO 2 permeability of mixed matrix membrane contained 15 % MOF was 145.5 Barrer and the CO 2 /CH 4 permselectivity was 11.95, which increased 2.21 times and 0.45 times compared to pure EC membrane. Comparison with 1991 and 2008 Robeson Upper Bound, the mixed matrix membranes were closer to the Robeson Upper Bound than pure EC membrane.

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High Efficiency Gas Permeability Membranes from Ethyl Cellulose Grafted with Ionic Liquids

Cited by 26 publications

References 36 publications

Comparison of CO2 Separation Efficiency from Flue Gases Based on Commonly Used Methods and Materials

Comparison of CO2 Separation Efficiency from Flue Gases Based on Commonly Used Methods and Materials

Toward the Next Generation of Sustainable Membranes from Green Chemistry Principles

Preparation of High‐Strength and High‐Permeability EC/PI/MOF Mixed Matrix Membrane**

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