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Hydrothermal stability of water sorption ionogels

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  • Dong, Hongsheng
  • Askalany, Ahmed A.
  • Olkis, Christopher
  • Zhao, Jiafei
  • Santori, Giulio

Abstract

Adsorption desalination and membrane distillation are the only thermally driven desalination technologies that can be undertaken at temperatures below 70 °C. Adsorption desalination is based on an adsorber whose performance primarily depends on the properties of the water sorbent. Water sorption ionogel represents a novel class of materials offering a large working capacity for desalination. In this study, water-sorptive ionogels were prepared and their hydrothermal stability was assessed. The results show that Syloid 72FP silica-based ionogels are hydrothermally stable. The ionic liquid EMIM Ac can be tightly confined in silica at amounts of up to 50 wt% and still withstand high relative humidity and temperature swings. Water uptake of the synthesized ionogel can be up to 1.64 gwater gionogel−1 at 90% RH, which is ∼3 times of that of Syloid 72FP silica and ∼4 times of that of activated carbon. The EMIM Ac/Syloid 72FP ionogel thus exhibits features appropriate for adsorption desalination systems.

Suggested Citation

  • Dong, Hongsheng & Askalany, Ahmed A. & Olkis, Christopher & Zhao, Jiafei & Santori, Giulio, 2019. "Hydrothermal stability of water sorption ionogels," Energy, Elsevier, vol. 189(C).
    • Handle: RePEc:eee:energy:v:189:y:2019:i:c:s036054421931881x
    DOI: 10.1016/j.energy.2019.116186
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    References listed on IDEAS

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    1. Wu, Jun W. & Hu, Eric J. & Biggs, Mark J., 2012. "Thermodynamic cycles of adsorption desalination system," Applied Energy, Elsevier, vol. 90(1), pages 316-322.
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    1. Olkis, Christopher & AL-Hasni, Shihab & Brandani, Stefano & Vasta, Salvatore & Santori, Giulio, 2021. "Solar powered adsorption desalination for Northern and Southern Europe," Energy, Elsevier, vol. 232(C).
    2. Asfahan, Hafiz M. & Sultan, Muhammad & Miyazaki, Takahiko & Saha, Bidyut B. & Askalany, Ahmed A. & Shahzad, Muhammad W. & Worek, William, 2022. "Recent development in adsorption desalination: A state of the art review," Applied Energy, Elsevier, vol. 328(C).

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