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Understanding the Effect of Water on CO2 Adsorption

Kolle, Joel M., Fayaz, Mohammadreza, Sayari, Abdelhamid·2021·Chemical Reviews

Abstract

Carbon capture from large sources and ambient air is one of the most promising strategies to curb the deleterious effect of greenhouse gases. Among different technologies, CO 2 adsorption has drawn widespread attention mostly because of its low energy requirements. Considering that water vapor is a ubiquitous component in air and almost all CO 2 -rich industrial gas streams, understanding its impact on CO 2 adsorption is of critical importance. Owing to the large diversity of adsorbents, water plays many different roles from a severe inhibitor of CO 2 adsorption to an excellent promoter. Water may also increase the rate of CO 2 capture or have the opposite effect. In the presence of amine-containing adsorbents, water is even necessary for their long-term stability. The current contribution is a comprehensive review of the effects of water whether in the gas feed or as adsorbent moisture on CO 2 adsorption. For convenience, we discuss the effect of water vapor on CO 2 adsorption over four broadly defined groups of materials separately, namely (i) physical adsorbents, including carbons, zeolites and MOFs, (ii) amine-functionalized adsorbents, and (iii) reactive adsorbents, including metal carbonates and oxides. For each category, the effects of humidity level on CO 2 uptake, selectivity, and adsorption kinetics under different operational conditions are discussed. Whenever possible, findings from different sources are compared, paying particular attention to both similarities and inconsistencies. For completeness, the effect of water on membrane CO 2 separation is also discussed, albeit briefly.

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Metadata

Authors
Kolle, J. M., Fayaz, M., & Sayari, A.
Venue
Chemical Reviews
Published
2021-05-11
Volume
121
Issue
13
Pages
7280-7345
ISSN
  • 0009-2665 (ISSN-L)
  • 1520-6890
OpenAlex
W3161721766
Cited by
523
References
531
FWCI
12.32
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Understanding the Effect of Water on CO2 Adsorption. https://app.cochat.ai/papers/10.1021/acs.chemrev.0c00762
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Kolle, J. M., Fayaz, M., & Sayari, A. (2021). Understanding the Effect of Water on CO2 Adsorption. Chemical Reviews. https://doi.org/10.1021/acs.chemrev.0c00762

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