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Nanoporous sponges as carbon-based sorbents for atmospheric water generation

Ulrich Legrand, Darius Klassen, Sean Watson, Alessio Aufoujal, Bernard Nisol, Richard Boudreault, Kristian E. Waters, Jean-Luc Meunier, Pierre-Luc Girard-Lauriault, Michael R. Wertheimer, Jason Robert Tavares

Article (2021)

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Abstract

Water scarcity threatens more and more people in the world. Moisture adsorption from the atmosphere represents a promising avenue to provide fresh water. Nanoporous sponges (“NPSs” ), new carbon-based sorbents synthesized from the pyrolysis of resorcinol-formaldehyde resin, can achieve comparable performance to metal organic framework-based systems, but at a significantly lower cost. Oxygen and nitrogen functionalities can be added to the NPS surface, through oxidation and addition of phenanthroline to the initial reagent mixture, respectively. The resulting NPS sorbents have high specific surface areas of 347 to 527 m2·g–1 and an average capillary-condensation-compatible pore size of 1.5 nm. When oxidized, the NPS can capture up to 0.28 g of water per gram of adsorbent at a relative pressure of 0.90 (0.14 g·g–1 at P/Psat = 0.40) and maintain this adsorption capacity over multiple adsorption/desorption cycles. Scaled-up synthesis of the NPS was performed and tested in an experimental water capture setup, showing good agreement between small- and larger-scale adsorption properties. Water adsorption isotherms fitted with the theoretical model proposed by Do and Do demonstrate that hydroxyl functionalities are of key importance to NPS behavior.

Uncontrolled Keywords

Water adsorption; Nanoporous sponges; Carbon-based adsorbent; Capillary condensation

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
Department: Department of Chemical Engineering
Department of Engineering Physics
Research Center: CREPEC - Center for Applied Research on Polymers and Composites
GCM - Thin Film Physics and Technology Research Group
Funders: CRSNG/NSERC, Prima, Awn Nanotech Inc.
Grant number: CRD-522391, R16-46-003
PolyPublie URL: https://publications.polymtl.ca/10446/
Journal Title: Industrial & Engineering Chemistry Research (vol. 60, no. 35)
Publisher: ACS Publications
DOI: 10.1021/acs.iecr.1c02248
Official URL: https://doi.org/10.1021/acs.iecr.1c02248
Date Deposited: 01 Sep 2022 13:11
Last Modified: 19 Nov 2022 14:22
Cite in APA 7: Legrand, U., Klassen, D., Watson, S., Aufoujal, A., Nisol, B., Boudreault, R., Waters, K. E., Meunier, J.-L., Girard-Lauriault, P.-L., Wertheimer, M. R., & Tavares, J. R. (2021). Nanoporous sponges as carbon-based sorbents for atmospheric water generation. Industrial & Engineering Chemistry Research, 60(35), 12923-12933. https://doi.org/10.1021/acs.iecr.1c02248

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