Volume 70, Issue 9 e18500
RESEARCH ARTICLE

Magnetic nanoparticle-induced sorbent regeneration for direct air capture

Kai Li

Corresponding Author

Kai Li

Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Correspondence

Kai Li and Kashif Nawaz, Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.

Email: [email protected] and [email protected]

Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Funding acquisition (equal), ​Investigation (equal), Methodology (equal), Project administration (equal), Resources (equal), Software (equal), Supervision (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Michael S. Kesler

Michael S. Kesler

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: Data curation (equal), Formal analysis (equal), ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Michael A. McGuire

Michael A. McGuire

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: Data curation (equal), ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Mingkan Zhang

Mingkan Zhang

Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Tolga Aytug

Tolga Aytug

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Huixin Jiang

Huixin Jiang

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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David S. Sholl

David S. Sholl

Energy Science and Technology Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

University of Tennessee Oak Ridge Innovation Institute, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Edgar Lara-Curzio

Edgar Lara-Curzio

Energy Science and Technology Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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Michael J. Thompson

Michael J. Thompson

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: Methodology (equal), Project administration (equal), Writing - review & editing (equal)

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Yanfei Li

Yanfei Li

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - review & editing (equal)

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Zack P. Tener

Zack P. Tener

Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Contribution: ​Investigation (equal), Methodology (equal), Writing - review & editing (equal)

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Kashif Nawaz

Corresponding Author

Kashif Nawaz

Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

Correspondence

Kai Li and Kashif Nawaz, Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.

Email: [email protected] and [email protected]

Contribution: Conceptualization (equal), Funding acquisition (equal), ​Investigation (equal), Methodology (equal), Writing - original draft (equal), Writing - review & editing (equal)

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First published: 03 June 2024

This article has been authored by UT-Battelle LLC under Contract DE-AC05-00OR22725 with DOE. The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Abstract

Direct air capture (DAC) is a promising technology for decarbonization through the removal of CO2 from the atmosphere. In many DAC processes, the regeneration energy used to restore the capture capacity of sorbents accounts for a significant fraction of the energy required by the whole process. Here we report an effective and scalable sorbent regeneration method for liquid DAC solvents based on magnetic nanoparticles (MNPs) heating with AC magnetic fields. MNPs can be directly heated to provide uniform and rapid volumetric heating, as we demonstrate by promoting the release of captured CO2 from an aqueous solution of potassium sarcosinate. Our results showed that 90% of the solvent can be regenerated within 7.5 min of heating through proposed technique. The MNPs and solvent are found to be stable during the regeneration process and the MNPs showed long-term stability in the CO2-saturated solvent. Cyclic experiments showed that the nanoparticles can be reused for multiple cycles without performance deterioration. The process is operated in a noncontact mode through electromagnetic waves, making it an adoptable approach for existing carbon capture systems. The MNPs heating provides an effective regeneration strategy for liquid solvents used in carbon capture processes, in particular for DAC.

CONFLICT OF INTEREST STATEMENT

Kai Li, Kashif Nawaz, Michael S. Kesler, Michael A. McGuire, Mingkan Zhang, Tolga Aytug, David S. Sholl, Edgar Lara-Curzio, and Zack P. Tener are named inventors on related patent application. UT-Battelle maintains approved Conflict of Interest Management Plans.

DATA AVAILABILITY STATEMENT

The data that supports the findings of this study are available in the Supporting Information S1.