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Economic and energetic analysis of capturing CO[subscript 2] from ambient air

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Show simple item record House, Kurt Zenz Baclig, Antonio C. Ranjan, Manya van Nierop, Ernst A. Wilcox, Jennifer Herzog, Howard J. 2012-07-26T19:38:12Z 2012-07-26T19:38:12Z 2011-12 2010-08
dc.identifier.issn 0027-8424
dc.identifier.issn 1091-6490
dc.description.abstract Capturing carbon dioxide from the atmosphere (“air capture”) in an industrial process has been proposed as an option for stabilizing global CO[subscript 2] concentrations. Published analyses suggest these air capture systems may cost a few hundred dollars per tonne of CO[subscript 2], making it cost competitive with mainstream CO[subscript 2] mitigation options like renewable energy, nuclear power, and carbon dioxide capture and storage from large CO[subscript 2] emitting point sources. We investigate the thermodynamic efficiencies of commercial separation systems as well as trace gas removal systems to better understand and constrain the energy requirements and costs of these air capture systems. Our empirical analyses of operating commercial processes suggest that the energetic and financial costs of capturing CO[subscript 2] from the air are likely to have been underestimated. Specifically, our analysis of existing gas separation systems suggests that, unless air capture significantly outperforms these systems, it is likely to require more than 400 kJ of work per mole of CO[subscript 2], requiring it to be powered by CO[subscript 2]-neutral power sources in order to be CO[subscript 2] negative. We estimate that total system costs of an air capture system will be on the order of $1,000 per tonne of CO[subscript 2], based on experience with as-built large-scale trace gas removal systems. en_US
dc.language.iso en_US
dc.publisher National Academy of Sciences of the United States of America en_US
dc.relation.isversionof en_US
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. en_US
dc.source PNAS en_US
dc.title Economic and energetic analysis of capturing CO[subscript 2] from ambient air en_US
dc.type Article en_US
dc.identifier.citation House, K. Z. et al. “Economic and Energetic Analysis of Capturing CO2 from Ambient Air.” Proceedings of the National Academy of Sciences 108.51 (2011): 20428–20433. Copyright ©2011 by the National Academy of Sciences en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Civil and Environmental Engineering en_US
dc.contributor.department MIT Energy Initiative en_US
dc.contributor.approver Herzog, Howard J.
dc.contributor.mitauthor House, Kurt Zenz
dc.contributor.mitauthor Ranjan, Manya
dc.contributor.mitauthor Herzog, Howard J.
dc.relation.journal Proceedings of the National Academy of Sciences of the United States of America en_US
dc.identifier.mitlicense PUBLISHER_POLICY en_US
dc.eprint.version Final published version en_US
dc.type.uri en_US
eprint.status en_US
dspace.orderedauthors House, K. Z.; Baclig, A. C.; Ranjan, M.; van Nierop, E. A.; Wilcox, J.; Herzog, H. J. en

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