Sustainable CO2 adsorbents prepared by coating chitosan onto mesoporous silicas for large-scale carbon capture technology

Sneddon, G., Ganin, A. Y. and Yiu, H. H.P. (2015) Sustainable CO2 adsorbents prepared by coating chitosan onto mesoporous silicas for large-scale carbon capture technology. Energy Technology, 3(3), pp. 249-258. (doi:10.1002/ente.201402211)

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Abstract

In this article, we report a new sustainable synthesis procedure for manufacturing chitosan/silica CO2 adsorbents. Chitosan is a naturally abundant material and contains amine functionality, which is essential for selective CO2 adsorptions. It is, therefore, ideally suited for manufacturing CO2 adsorbents on a large scale. By coating chitosan onto high-surface-area mesoporous silica supports, including commercial fumed silica (an economical and accessible reagent) and synthetic SBA-15 and MCF silicas, we have prepared a new family of CO2 adsorbents, which have been fully characterised with nitrogen adsorption isotherms, thermogravimetric analysis/differential scanning calorimetry, TEM, FTIR spectroscopy and Raman spectroscopy. These adsorbents have achieved a significant CO2 adsorption capacity of up to 0.98 mmol g−1 at ambient conditions (P=1 atm and T=25 °C). The materials can also be fully regenerated/recycled on demand at temperatures as low as 75 °C with a >85 % retention of the adsorption capacity after 4 cycles, which makes them promising candidates for advanced CO2 capture, storage and utilisation technology.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ganin, Dr Alexey
Authors: Sneddon, G., Ganin, A. Y., and Yiu, H. H.P.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Energy Technology
Publisher:Wiley - V C H Verlag GmbH & Co. KGaA
ISSN:2194-4288
ISSN (Online):2194-4296
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Energy Technology 3(3):249-258
Publisher Policy:Reproduced under a Creative Commons License

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