Carbonation of lime-based materials under ambient conditions for direct air capture

Erans, Mar�a; Nabavi, Seyed Ali; Manovi?, Vasilije

Abstract

Carbonation of lime-based materials at high temperatures has been extensively explored in the processes for decarbonisation of the power and industrial sectors. However, their capability to capture carbon dioxide from air at realistic ambient conditions in direct air capture technologies is less explored. In this work, lime and hydrated lime samples are exposed to ambient air for prolonged durations, as well as to calcination/ambient-carbonation cycles, to assess their carbonation performance. It is shown that the humidity plays a key role in carbonation of lime under ambient conditions. Furthermore, faster weathering and higher conversions are demonstrated by hydrated lime, showing a carbonation conversion of 70% after 300 h. Importantly, it was found that there was a negligible difference in the carbonation conversions during five calcination/ambient-carbonation cycles, which can be explained by simultaneous reactivation of cycled material by moist air. These findings indicated that lime-based materials are suitable for carbon dioxide capture from ambient air employing cyclic processes, in a practical time scale, and that humidity of air plays a key role.

Citation

Erans, M., Nabavi, S. A., & Manović, V. (2020). Carbonation of lime-based materials under ambient conditions for direct air capture. Journal of Cleaner Production, 242, Article 118330. https://doi.org/10.1016/j.jclepro.2019.118330

• Journal Article Type: Article
• Acceptance Date: Sep 7, 2019
• Online Publication Date: Sep 7, 2019
• Publication Date: Jan 1, 2020
• Deposit Date: Oct 16, 2019
• Publicly Available Date: Sep 8, 2020
• Journal: Journal of Cleaner Production
• Print ISSN: 0959-6526
• Electronic ISSN: 1879-1786
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 242
• Article Number: 118330
• DOI: https://doi.org/10.1016/j.jclepro.2019.118330
• Keywords: Renewable Energy, Sustainability and the Environment; Strategy and Management; Industrial and Manufacturing Engineering; General Environmental Science
• Public URL: https://nottingham-repository.worktribe.com/output/2845408
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0959652619332007
• Additional Information: This article is maintained by: Elsevier; Article Title: Carbonation of lime-based materials under ambient conditions for direct air capture; Journal Title: Journal of Cleaner Production; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.jclepro.2019.118330; Content Type: article; Copyright: © 2019 The Authors. Published by Elsevier Ltd.
• Contract Date: Oct 16, 2019