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Green processing using ionic liquids and CO2

Author

Listed:
  • Lynnette A. Blanchard

    (University of Notre Dame)

  • Dan Hancu

    (University of Pittsburgh)

  • Eric J. Beckman

    (University of Pittsburgh)

  • Joan F. Brennecke

    (University of Notre Dame)

Abstract

Many organic solvents evaporate into the atmosphere with detrimental effects on the environment and human health. But room-temperature ionic liquids, with low viscosity and no measurable vapour pressure1, can be used as environmentally benign media for a range of industrially important chemical processes2,3,4,5,6, despite uncertainties about thermal stability and sensitivity to oxygen and water. It is difficult to recover products, however, as extraction with water7 works only for hydrophilic products, distillation is not suitable for poorly volatile or thermally labile products, and liquid-liquid extraction using organic solvents results in cross-contamination. We find that non-volatile organic compounds can be extracted from ionic liquids using supercritical carbon dioxide, which is widely used to extract large organic compounds with minimal pollution8. Carbon dioxide dissolves in the liquid to facilitate extraction, but the ionic liquid does not dissolve in carbon dioxide, so pure product can be recovered.

Suggested Citation

  • Lynnette A. Blanchard & Dan Hancu & Eric J. Beckman & Joan F. Brennecke, 1999. "Green processing using ionic liquids and CO2," Nature, Nature, vol. 399(6731), pages 28-29, May.
    • Handle: RePEc:nat:nature:v:399:y:1999:i:6731:d:10.1038_19887
    DOI: 10.1038/19887
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    Citations

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    Cited by:

    1. Fu, Dong & Zhang, Pan, 2015. "Investigation of the absorption performance and viscosity for CO2 capture process using [Bmim][Gly] promoted MDEA (N-methyldiethanolamine) aqueous solution," Energy, Elsevier, vol. 87(C), pages 165-172.
    2. Ma, Chunyan & Liu, Chang & Lu, Xiaohua & Ji, Xiaoyan, 2018. "Techno-economic analysis and performance comparison of aqueous deep eutectic solvent and other physical absorbents for biogas upgrading," Applied Energy, Elsevier, vol. 225(C), pages 437-447.
    3. Xie, Yujiao & Zhang, Yingying & Lu, Xiaohua & Ji, Xiaoyan, 2014. "Energy consumption analysis for CO2 separation using imidazolium-based ionic liquids," Applied Energy, Elsevier, vol. 136(C), pages 325-335.
    4. Fu, Dong & Zhang, Pan & Mi, ChenLu, 2016. "Effects of concentration and viscosity on the absorption of CO2 in [N1111][Gly] promoted MDEA (methyldiethanolamine) aqueous solution," Energy, Elsevier, vol. 101(C), pages 288-295.
    5. Chen, Yifeng & Song, Shuailong & Li, Ning & Wu, Jian & Lu, Xiaohua & Ji, Xiaoyan, 2022. "Developing hybrid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/water absorbent for CO2 separation," Applied Energy, Elsevier, vol. 326(C).
    6. de Jesus, Sérgio S. & Maciel Filho, Rubens, 2022. "Are ionic liquids eco-friendly?," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).
    7. Shamair, Zufishan & Habib, Nitasha & Gilani, Mazhar Amjad & Khan, Asim Laeeq, 2020. "Theoretical and experimental investigation of CO2 separation from CH4 and N2 through supported ionic liquid membranes," Applied Energy, Elsevier, vol. 268(C).
    8. Fu, Dong & Zhang, Pan & Wang, LeMeng, 2016. "Absorption performance of CO2 in high concentrated [Bmim][Lys]-MDEA aqueous solution," Energy, Elsevier, vol. 113(C), pages 1-8.
    9. Yu, Xinhai & Yang, Jie & Lu, Haitao & Tu, Shan-Tung & Yan, Jinyue, 2015. "Energy-efficient extraction of fuel from Chlorella vulgaris by ionic liquid combined with CO2 capture," Applied Energy, Elsevier, vol. 160(C), pages 648-655.
    10. Lu, Jian-Gang & Lu, Chun-Ting & Chen, Yue & Gao, Liu & Zhao, Xin & Zhang, Hui & Xu, Zheng-Wen, 2014. "CO2 capture by membrane absorption coupling process: Application of ionic liquids," Applied Energy, Elsevier, vol. 115(C), pages 573-581.
    11. Tooba Qureshi & Majeda Khraisheh & Fares Almomani, 2023. "Cost and Heat Integration Analysis for CO 2 Removal Using Imidazolium-Based Ionic Liquid-ASPEN PLUS Modelling Study," Sustainability, MDPI, vol. 15(4), pages 1-23, February.
    12. Wang, Xianfeng & Akhmedov, Novruz G. & Hopkinson, David & Hoffman, James & Duan, Yuhua & Egbebi, Adefemi & Resnik, Kevin & Li, Bingyun, 2016. "Phase change amino acid salt separates into CO2-rich and CO2-lean phases upon interacting with CO2," Applied Energy, Elsevier, vol. 161(C), pages 41-47.
    13. Chen, Yifeng & Sun, Yunhao & Yang, Zhuhong & Lu, Xiaohua & Ji, Xiaoyan, 2020. "CO2 separation using a hybrid choline-2-pyrrolidine-carboxylic acid/polyethylene glycol/water absorbent," Applied Energy, Elsevier, vol. 257(C).
    14. Ma, Chunyan & Xie, Yujiao & Ji, Xiaoyan & Liu, Chang & Lu, Xiaohua, 2018. "Modeling, simulation and evaluation of biogas upgrading using aqueous choline chloride/urea," Applied Energy, Elsevier, vol. 229(C), pages 1269-1283.
    15. Xie, Yujiao & Björkmalm, Johanna & Ma, Chunyan & Willquist, Karin & Yngvesson, Johan & Wallberg, Ola & Ji, Xiaoyan, 2018. "Techno-economic evaluation of biogas upgrading using ionic liquids in comparison with industrially used technology in Scandinavian anaerobic digestion plants," Applied Energy, Elsevier, vol. 227(C), pages 742-750.

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