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Perspectives on the adsorption of CO2 on amine-modified silica studied by infrared spectroscopy
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Number of Authors: 22019 (English)In: Current opinion in green and sustainable chemistry, ISSN 2452-2236, Vol. 16, p. 13-19Article in journal (Refereed) Published
Abstract [en]

Amine-modified adsorbents are being researched for their potential to capture CO2 from various gas mixtures, and we review how IR spectroscopy has been used to study the associated CO2-amine chemistry. It has been used to reveal that CO2 chemisorbs as ammonium-carbamate ion pairs especially when the amine density is high. Carbamic acid and related other moieties tend to form in parallel to the ion pairs when the amine density is low. The amines have been shown to degrade on cyclic heat treatment. To further study the formation of bicarbonates on reactive adsorption of CO2 and H2O, degradation of the organics, and the use of other supports than silica are suggested.

Place, publisher, year, edition, pages
2019. Vol. 16, p. 13-19
Keywords [en]
Green & Sustainable Science & Technology
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-169295DOI: 10.1016/j.cogsc.2018.11.010ISI: 000465022900004OAI: oai:DiVA.org:su-169295DiVA, id: diva2:1320552
Available from: 2019-06-05 Created: 2019-06-05 Last updated: 2019-06-05Bibliographically approved

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