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Chemical and Biochemical Engineering Quarterly, Vol. 32 No. 1, 2018.

Original scientific paper

https://doi.org/10.15255/CABEQ.2017.1193

Synthesis, Characterization, and Impregnation of Some Ionic Liquids on Polymer Membrane for Separation of Carbon Dioxide from Its Mixture with Methane

T. T. L. Bui ; Oil Refinery and Petrochemistry Department, Hanoi University of Mining and Geology, 18-Vien, Duc Thang, Bac Tu Liem, Ha Noi, Viet Nam
H. T. N. Uong ; b) Institute of Chemistry, Vietnam Academy of Sciences and Technology, 18-Hoang Quoc Viet, Nghia Đo, Cau Giay, Ha Noi, Viet Nam; c) Institute of Science and Technology, Vietnam Academy of Sciences and Technology, 18-Hoang Quoc Viet, Nghia Đo, Cau Giay, Ha
L. V. Nguyen ; Institute of Chemistry, Vietnam Academy of Sciences and Technology, 18-Hoang Quoc Viet, Nghia Đo, Cau Giay, Ha Noi, Viet Nam
N. C. Pham ; High School for Gifted Students, Ha Noi National University of Education

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Abstract

Some 1-alkyl-3-methylimidazolium-based ionic liquids were synthesized, characterized, and immobilized on membranes to form supported ionic liquid membranes. The supported ionic liquid membranes were characterized by SEM. The initial transmembrane
pressures were investigated for each type of impregnated membrane. The CO2/CH4 single gas and mixed gas permeability (CO2 and CH4) have been investigated. The results showed that the CO2/CH4 ideal selectivities and mixed gas selectivities reached 15.45 –23.9 and 13.91 – 22.82, respectively (equivalent to separation yields of 93.3 – 95.98 %). The 1-alkyl-3-methylimidazolium acetate impregnated membrane leads to a slightly lower CO2/CH4 selectivity, however, this ionic liquid is stable, free of halogen and has a low price. The impregnated membranes prepared from polyvinylidene fluoride are more stable than those from polyethersulfone support, and have a higher affinity for CO2 compared to other gas. The obtained high CO2/CH4 selectivities indicate that immobilized membranes can be used for CO2 separation processes.







This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

ionic liquid; CO2/CH4 separation; membrane; supported ionic liquid membrane

Hrčak ID:

197232

URI

https://hrcak.srce.hr/197232

Publication date:

29.3.2018.

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