Hydrothermal stability of water sorption ionogels

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

Energy, 2019, vol. 189, issue C

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.

Keywords: Ionic liquid; Silica; Ionogel; Adsorption desalination (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:189:y:2019:i:c:s036054421931881x

DOI: 10.1016/j.energy.2019.116186

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