Authors : Elochukwu Emmanuel Okoye; Taopheeck Yusuf; Shaker Alamir; Victor Hammed

Volume/Issue : Volume 10 - 2025, Issue 12 - December

Google Scholar : https://tinyurl.com/mrxf49vv

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DOI : https://doi.org/10.38124/ijisrt/25dec411

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Abstract : Increasing levels of atmospheric CO2, primarily derived from fossil fuel combustion and industrial activity, are one of the most pressing challenges facing countries worldwide. This demands innovative strategies for capture and recycling. Conventional mechanisms, including membrane separation, amine scrubbing, and cryogenic processes, are effective, but often suffer from high energy demands, limited scalability, and solvent degradation. Ionic liquids (ILs) have emerged as more beneficial alternatives because of their low volatility, high thermal stability, and structural tunability. However, limitations, including environmental concerns and high viscosity, limit their application. This paper examines the development of functionalized organic ionic liquids (FOILs) as sustainable solvents for CO2 capture and recycling. It highlights recent advances in structural functionalization strategies and synthesis methods following a literature-based review approach. Case studies provide evidence that amino-functionalized and fluorinated FOILs have superior recyclability, absorption capacity, and stability compared with traditional solvents. Industrial applications in flue gas treatment, natural gas sweetening, and integration with carbon utilization pathways are evaluated, while identifying key challenges like synthesis cost, viscosity, and environmental risks. However, opportunities for pilot-scale validation and green design are also emphasized. FOILs generally represent a next- generation platform for effective industrial CO2 management, with potential to advance sustainable decarbonization while supporting the transition toward a circular carbon economy.

Keywords : Functionalized Organic Ionic Liquids (FOILs), Carbon Dioxide Absorption, Industrial Systems, Recycling, Ionic Liquids.

References :

1. Al-Bodour, A., Alomari, N., Perez-Duran, G., Rozas, S., Iglesias-Silva, G., Aparicio, S., ... Atilhan, M. (2025). Ionic liquids as multidimensional materials: A review from fundamentals to applications. Energy & Fuels.
2. Alguacil, F. J., & Robla, J. I. (2024). Using ionic liquids to improve CO₂ capture. Molecules, 29(22), 5388.
3. Ali, S. A., Khan, A. U., Mulk, W. U., Khan, H., Nasir Shah, S., Zahid, A., ... Rahman, S. (2023). An ongoing futuristic career of metal–organic frameworks and ionic liquids, a magical gateway to capture CO₂; a critical review. Energy & Fuels, 37(20), 15394–15428.
4. Anwar, M. N., Iftikhar, M., Bakhat, B. K., Sohail, N. F., Baqar, M., Yasir, A. M., & Nizami, A. S. (2019). Sources of carbon dioxide and environmental issues. In Sustainable Agriculture Reviews (pp. 13–35). Springer.
5. Ayanleye, O., Hammed, V. O., Akinrotimi, O., & Bankole, A. A. (2024). Utilization of polytetrafluoroethylene (PTFE) for insulating aerospace cables. International Journal of Advanced Research in Engineering and Technology, 15, 57–64.
6. Bahman, N., Alalaiwat, D., Abdulmohsen, Z., Al Khalifa, M., Al Baharna, S., Al-Mannai, M., & Younis, A. (2022). A critical review on global CO₂ emission: Where do industries stand? Reviews on Environmental Health, 38, 681–696.
7. Basaiahgari, A., & Gardas, R. L. (2021). Ionic liquid–based aqueous biphasic systems as sustainable extraction and separation techniques. Current Opinion in Green and Sustainable Chemistry, 27, 100423.
8. Blaga, A. C., Tucaliuc, A., & Kloetzer, L. (2022). Applications of ionic liquids in carboxylic acids separation. Membranes, 12(8), 771.
9. Chen, Y., & Mu, T. (2019). Conversion of CO₂ to value-added products mediated by ionic liquids. Green Chemistry, 21(10), 2544–2574.
10. Cuéllar-Franca, R. M., García-Gutiérrez, P., Hallett, J. P., & Mac Dowell, N. (2021). A life cycle approach to solvent design: Challenges and opportunities for ionic liquids–application to CO₂ capture. Reaction Chemistry & Engineering, 6(2), 258–278.
11. Dongare, S., Zeeshan, M., Aydogdu, A. S., Dikki, R., Kurtoğlu-Öztulum, S. F., Coskun, O. K., ... Gurkan, B. (2024). Reactive capture and electrochemical conversion of CO₂ with ionic liquids and deep eutectic solvents. Chemical Society Reviews, 53(17), 8563–8631.
12. Gałko, G., & Sajdak, M. (2022). Trends for the thermal degradation of polymeric materials: Analysis of available techniques, issues, and opportunities. Applied Sciences, 12(18), 9138.
13. Gkotsis, P., Peleka, E., & Zouboulis, A. (2023). Membrane-based technologies for post-combustion CO₂ capture from flue gases: Recent progress in commonly employed membrane materials. Membranes, 13(12), 898.
14. Gonçalves, A. R., Paredes, X., Cristino, A. F., Santos, F. J. V., & Queirós, C. S. (2021). Ionic liquids—A review of their toxicity to living organisms. International Journal of Molecular Sciences, 22(11), 5612.
15. Greer, A. J., Jacquemin, J., & Hardacre, C. (2020). Industrial applications of ionic liquids. Molecules, 25(21), 5207.
16. Gunawardene, O. H., Gunathilake, C. A., Vikrant, K., & Amaraweera, S. M. (2022). Carbon dioxide capture through physical and chemical adsorption using porous carbon materials: A review. Atmosphere, 13(3), 397.
17. Hafizi, A., Mokari, M., Khalifeh, R., Farsi, M., & Rahimpour, M. R. (2020). Improving the CO₂ solubility in aqueous mixture of MDEA and different polyamine promoters: The effects of primary and secondary functional groups. Journal of Molecular Liquids, 297, 111803.
18. Hammed, V. O. (2023). Solubility of CO₂ in paramagnetic ionic liquids [Doctoral dissertation, North Carolina Agricultural and Technical State University]. ProQuest Dissertations Publishing.
19. Jafarizadeh, H., Yamini, E., Zolfaghari, S. M., Esmaeilion, F., Assad, M. E. H., & Soltani, M. (2024). Navigating challenges in large-scale renewable energy storage: Barriers, solutions, and innovations. Energy Reports, 12, 2179–2192.
20. Knoop, J. E., Hammed, V., Yoder, L. D., Maselugbo, A. O., Sadiku, B. L., & Alston, J. R. (2023). Synthesis, characterization, and magnetic properties of lanthanide-containing paramagnetic ionic liquids: An Evans' NMR study. ACS Applied Engineering Materials, 1(11), 2831–2846.
21. Kócs, E. A. (2017). The global carbon nation: Status of CO₂ capture, storage and utilization. Energy Procedia, 114, 6060–6071.
22. Koutsoukos, S., Becker, J., Dobre, A., Fan, Z., Othman, F., Philippi, F., ... Welton, T. (2022). Synthesis of aprotic ionic liquids. Nature Reviews Methods Primers, 2(1), 49.
23. Lebedeva, O., Kultin, D., & Kustov, L. (2023). Advanced research and prospects on polymer ionic liquids: Trends, potential and application. Green Chemistry, 25(22), 9001–9019.
24. Li, G., Chen, K., Lei, Z., & Wei, Z. (2023). Condensable gases capture with ionic liquids. Chemical Reviews, 123(16), 10258–10301.
25. Li, X., Yao, D., Wang, D., He, Z., Tian, X., Xin, Y., ... Zheng, Y. (2022). Amino-functionalized ZIFs-based porous liquids with low viscosity for efficient low-pressure CO₂ capture and CO₂/N₂ separation. Chemical Engineering Journal, 429, 132296.
26. Liu, S. H., Wang, H., Sun, J. K., Antonietti, M., & Yuan, J. (2022). Smart hydrogen atoms in heterocyclic cations of 1,2,4-triazolium-type poly (ionic liquid). Accounts of Chemical Research, 55(24), 3675–3687.
27. Meng, F., Meng, Y., Ju, T., Han, S., Lin, L., & Jiang, J. (2022). Research progress of aqueous amine solution for CO₂ capture: A review. Renewable and Sustainable Energy Reviews, 168, 112902.
28. Mesbah, M., Pouresmaeil, S., Galledari, S. A., Momeni, M., Shahsavari, S., & Soroush, E. (2019). Ionic liquids for carbon dioxide capture. In Sustainable Agriculture Reviews (pp. 87–107). Springer.
29. Miao, S., Atkin, R., & Warr, G. (2022). Design and applications of biocompatible choline amino acid ionic liquids. Green Chemistry, 24(19), 7281–7304.
30. Nagireddi, S., Agarwal, J. R., & Vedapuri, D. (2023). Carbon dioxide capture, utilization, and sequestration: Current status, challenges, and future prospects for global decarbonization. ACS Engineering Au, 4(1), 22–48.
31. Nordness, O., & Brennecke, J. F. (2020). Ion dissociation in ionic liquids and ionic liquid solutions. Chemical Reviews, 120(23), 12873–12902.
32. Numpilai, T., Pham, L. K. H., & Witoon, T. (2024). Advances in ionic liquid technologies for CO₂ capture and conversion: A comprehensive review. Industrial & Engineering Chemistry Research, 63, 19865–19915.
33. Philippi, F., & Welton, T. (2021). Targeted modifications in ionic liquids–from understanding to design. Physical Chemistry Chemical Physics, 23(12), 6993–7021.
34. Qader, I. B., & Prasad, K. (2022). Recent developments on ionic liquids and deep eutectic solvents for drug delivery applications. Pharmaceutical Research, 39(10), 2367–2383.
35. Qu, Y., Zhao, Y., Li, D., & Sun, J. (2022). Task-specific ionic liquids for carbon dioxide absorption and conversion into value-added products. Current Opinion in Green and Sustainable Chemistry, 34, 100599.
36. Raganati, F., & Ammendola, P. (2024). CO₂ post-combustion capture: A critical review of current technologies and future directions. Energy & Fuels, 38(15), 13858–13905.
37. Romanos, G. E., Vergadou, N., & Economou, I. G. (2022). Ionic liquids in carbon capture. In Sustainable Carbon Capture (pp. 73–141). CRC Press.
38. Said, R. B., Kolle, J. M., Essalah, K., Tangour, B., & Sayari, A. (2020). A unified approach to CO₂–amine reaction mechanisms. ACS Omega, 5(40), 26125–26133.
39. Sanni, S. E., Vershima, D. A., Okoro, E. E., & Oni, B. A. (2022). Technological advancements in the use of ionic liquid-membrane systems for CO₂ capture from biogas/flue gas-A review. Heliyon, 8(12), e12327.
40. Shukla, S. K., Khokarale, S. G., Bui, T. Q., & Mikkola, J. P. T. (2019). Ionic liquids: Potential materials for carbon dioxide capture and utilization. Frontiers in Materials, 6, 42.
41. Singh, P., Dhyani, S., Sharma, H. D., Mishra, S., Juyal, Y., & Rawat, A. (2023). Design and development of exploratory model in AI for addressing CO₂ emission for a sustainable future. In 2023 4th International Conference on Computation, Automation and Knowledge Management (ICCAKM) (pp. 1–6). IEEE.
42. Usman, M., & Cheng, S. (2024). Recent trends and advancements in green synthesis of biomass-derived carbon dots. Eng, 5(3), 2223–2263.
43. Wang, Y., Wang, Y., Zhao, Y., Fu, J., & Liu, Z. (2025). Ionic liquids promoted transformation of carbon dioxide. Chemical Reviews. Advance online publication.
44. Wylie, L., Perli, G., Avila, J., Livi, S., Duchet-Rumeau, J., Costa Gomes, M. F., & Pádua, A. A. (2022). Theoretical analysis of physical and chemical CO₂ absorption by tri- and tetraepoxidized imidazolium ionic liquids. The Journal of Physical Chemistry B, 126(46), 9704–9717.
45. Yu, G., Wei, Z., Chen, K., Guo, R., & Lei, Z. (2022). Predictive molecular thermodynamic models for ionic liquids. AIChE Journal, 68(4), e17575.
46. Zhang, T., Zhang, M., Jin, L., Xu, M., & Li, J. (2024). Advancing carbon capture in hard-to-abate industries: Technology, cost, and policy insights. Clean Technologies and Environmental Policy, 26(7), 2077–2094.
47. Zhang, Y., Li, J., Yin, Z., Zhang, J., Guo, W., & Wang, M. (2020). Quantum chemical study of the carbon dioxide-philicity of surfactants: Effects of tail functionalization. Langmuir, 36(35), 10385–10394.
48. Zhou, T., Gui, C., Sun, L., Hu, Y., Lyu, H., Wang, Z., ... Yu, G. (2023). Energy applications of ionic liquids: Recent developments and future prospects. Chemical Reviews, 123(21), 12170–12253.