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Impacts of metal oxide additives on the capacity and stability of calcium oxide based materials for the reactive sorption of CO₂

Minardi, Luke T. and Alshafei, Faisal H. and Mishra, Zubin K. and Simonetti, Dante A. (2021) Impacts of metal oxide additives on the capacity and stability of calcium oxide based materials for the reactive sorption of CO₂. Sustainable Energy and Fuels, 5 (3). pp. 767-778. ISSN 2398-4902. https://resolver.caltech.edu/CaltechAUTHORS:20210325-072154132

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Abstract

Several metal additives (Al, Co, Cr, Er, Ga, In, La, Li, Mg, Nd, Y, and Zn) at nominal 3 : 10 (M : Ca) ratios were investigated for their ability to stabilize high capacity calcium oxide nanofibers over repeated carbonation–regeneration cycles. Samples containing Mg, Y, Nd, La, and Er additives had maximum sorption capacities from 0.40–0.60 g_(CO₂) g_(sorbent) ⁻¹, compared to 0.79 g_(CO₂) g_(sorbent) ⁻¹ for CaO. Y, Al, Er, and Nd were most effective for improving the stability of CaO, each had first order deactivation constants that were at least one order of magnitude smaller compared to CaO. Post-carbonation characterization revealed that particle agglomeration and structure degradation were the primary reasons for loss in capacity over repeated carbonation–regeneration cycles. Metal additives with high Tammann temperatures of the corresponding metal oxide mitigated structure degradation, leading to improved cyclic stability compared to pure CaO. Additionally, mixed oxide formation had no effect on stability albeit a deleterious effect on sorbent capacity.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1039/d0se01638aDOIArticle
http://www.rsc.org/suppdata/d0/se/d0se01638a/d0se01638a1.pdfPublisherSupplementary Information
ORCID:
AuthorORCID
Alshafei, Faisal H.0000-0003-1808-1374
Simonetti, Dante A.0000-0002-5708-460X
Alternate Title:Impacts of metal oxide additives on the capacity and stability of calcium oxide based materials for the reactive sorption of CO2
Additional Information:© 2021 The Royal Society of Chemistry. Submitted 03 Nov 2020; Accepted 19 Dec 2020; First published 21 Dec 2020. The authors acknowledge the financial support from the UCLA Samueli School of Engineering, from the UCLA Office of Equity, Diversity, and Inclusion, and from the Hellman Fellows Fund. The authors also acknowledge the Molecular and Nano Archeology (MNA) Laboratory at UCLA Materials Science Department for use of the SEM, the Molecular Instrumentation Center (MIC) at UCLA for use of the TGA, and Lu Lab in the UCLA Chemical Engineering Department for use of the XRD. FHA acknowledges Aramco R&D for financially supporting his graduate studies at UCLA. There are no conflicts to declare.
Funders:
Funding AgencyGrant Number
UCLAUNSPECIFIED
Hellman Fellows FundUNSPECIFIED
Aramco R&DUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20210325-072154132
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210325-072154132
Official Citation:Impacts of metal oxide additives on the capacity and stability of calcium oxide based materials for the reactive sorption of CO₂. Sustainable Energy Fuels, 2021, 5, 767-778; DOI: 10.1039/d0se01638a
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108548
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Mar 2021 23:19
Last Modified:25 Mar 2021 23:19

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