Volume 8, Issue 2 (2024)
IQBQ 2024, 8(2): 13-23 |
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Ghavami A, Abedini R. Performance evaluation of Pebax/ deep eutectic solvent supported liquid membrane in carbon dioxide separation. IQBQ 2024; 8 (2) :13-23
URL: http://arcpe.modares.ac.ir/article-38-78263-en.html
URL: http://arcpe.modares.ac.ir/article-38-78263-en.html
1- EOR and Gas Processing Research Lab., Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
2- EOR and Gas Processing Research Lab., Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran ,abedini@nit.ac.ir
2- EOR and Gas Processing Research Lab., Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran ,
Abstract: (201 Views)
Abstract:
Research subject:
The use of deep eutectic solvents (DES) as an effective approach to enhance the performance of polymer membranes in CO2 gas separation has gained significant attention. Membranes modified with DES are referred to as supported liquid membranes (SLMs).
Research approach:
In this study, two-component (choline chloride/urea) and three-component (choline chloride/urea/DBU) DES were used to improve the efficiency of Pebax-1657 (poly(ether-block-amide)) membranes for separating CO2 from CH4 and N2 gases. Gas permeability tests conducted at 2 bar pressure and 30 °C compared pure membranes with membranes enhanced by 10 wt.% of the two-component DES and 10 wt.% of the three-component DES.
Results:
Results showed that the CO2 permeability increased from 3.77 barrer for the pure membrane to 4.96 barrer for the 10 wt.% DES two-component membrane, and to 7.101 barrer for the 10 wt.% DES-DBU three-component membrane. The CO2/N2 and CO2/CH4 selectivities improved from 20.32 and 11.36 for the pure membrane to 38.56 and 13.77 for the DES two-component membrane, and to 40.68 and 14.32 for DES-DBU three-component membrane, respectively. Moreover, with an increase in feed pressure from 2 bar to 6 and 10 bar, the membrane performance improved. At 10 bar, the CO2 permeability for the 10 wt.% DES three-component membrane increased to 16.28 barrer, while the CO2/N2 and CO2/CH4 selectivities rose to 56.13 and 20.60, respectively. Since the DES-DBU three-component membrane showed better performance than the DES two-component membrane and the pure membrane, various weight percentages of this composition were used to further enhance the Pebax polymer membrane. The results indicated that the membrane containing 20 wt.% of the DES-DBU three-component exhibited the best performance among all tested membranes. At 2 bar pressure and 30 °C, this membrane increased CO2 permeability to 13.88 barrer and CO2/N2 and CO2/CH4 selectivities to 51.46 and 18.80, respectively. Furthermore, at 10 bar pressure, the CO2 permeability reached 21.25 barrer, while the CO2/N2 and CO2/CH4 selectivities improved to 40.66 and 60.25, respectively. Ultimately, this membrane, compared to other studies, has successfully surpassed the Robeson limit, demonstrating its high potential for applications related to CO2 gas separation.
Research subject:
The use of deep eutectic solvents (DES) as an effective approach to enhance the performance of polymer membranes in CO2 gas separation has gained significant attention. Membranes modified with DES are referred to as supported liquid membranes (SLMs).
Research approach:
In this study, two-component (choline chloride/urea) and three-component (choline chloride/urea/DBU) DES were used to improve the efficiency of Pebax-1657 (poly(ether-block-amide)) membranes for separating CO2 from CH4 and N2 gases. Gas permeability tests conducted at 2 bar pressure and 30 °C compared pure membranes with membranes enhanced by 10 wt.% of the two-component DES and 10 wt.% of the three-component DES.
Results:
Results showed that the CO2 permeability increased from 3.77 barrer for the pure membrane to 4.96 barrer for the 10 wt.% DES two-component membrane, and to 7.101 barrer for the 10 wt.% DES-DBU three-component membrane. The CO2/N2 and CO2/CH4 selectivities improved from 20.32 and 11.36 for the pure membrane to 38.56 and 13.77 for the DES two-component membrane, and to 40.68 and 14.32 for DES-DBU three-component membrane, respectively. Moreover, with an increase in feed pressure from 2 bar to 6 and 10 bar, the membrane performance improved. At 10 bar, the CO2 permeability for the 10 wt.% DES three-component membrane increased to 16.28 barrer, while the CO2/N2 and CO2/CH4 selectivities rose to 56.13 and 20.60, respectively. Since the DES-DBU three-component membrane showed better performance than the DES two-component membrane and the pure membrane, various weight percentages of this composition were used to further enhance the Pebax polymer membrane. The results indicated that the membrane containing 20 wt.% of the DES-DBU three-component exhibited the best performance among all tested membranes. At 2 bar pressure and 30 °C, this membrane increased CO2 permeability to 13.88 barrer and CO2/N2 and CO2/CH4 selectivities to 51.46 and 18.80, respectively. Furthermore, at 10 bar pressure, the CO2 permeability reached 21.25 barrer, while the CO2/N2 and CO2/CH4 selectivities improved to 40.66 and 60.25, respectively. Ultimately, this membrane, compared to other studies, has successfully surpassed the Robeson limit, demonstrating its high potential for applications related to CO2 gas separation.
Keywords: Supported liquid membrane, Carbon dioxide separation, Permeability, Selectivity, Deep eutectic solvent
Article Type: Original Research |
Subject:
membrane
Received: 2024/11/30 | Accepted: 2024/12/28 | Published: 2024/06/25
Received: 2024/11/30 | Accepted: 2024/12/28 | Published: 2024/06/25
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