The DOI matches its Crossref record; 15 of the 15 references it cites were found in a registry or an index.
Life-cycle assessment of an industrial direct air capture process based on temperature–vacuum swing adsorption
Open accessAbstract
Current climate targets require negative carbon dioxide (CO2) emissions. Direct air capture is a promising negative emission technology, but energy and material demands lead to trade-offs with indirect emissions and other environmental impacts. Here, we show by life-cycle assessment that the commercial direct air capture plants in Hinwil and Hellisheiði operated by Climeworks can already achieve negative emissions today, with carbon capture efficiencies of 85.4% and 93.1%. The climate benefits of direct air capture, however, depend strongly on the energy source. When using low-carbon energy, as in Hellisheiði, adsorbent choice and plant construction become more important, inducing up to 45 and 15 gCO2e per kilogram CO2 captured, respectively. Large-scale deployment of direct air capture for 1% of the global annual CO2 emissions would not be limited by material and energy availability. However, the current small-scale production of amines for the adsorbent would need to be scaled up by more than an order of magnitude. Other environmental impacts would increase by less than 0.057% when using wind power and by up to 0.30% for the global electricity mix forecasted for 2050. Energy source and efficiency are essential for direct air capture to enable both negative emissions and low-carbon fuels. Direct air capture (DAC) of CO2 has garnered interest as a negative emissions technology to help achieve climate targets, but indirect emissions and other environmental impacts must be better understood. Here, Deutz and Bardow perform a life-cycle assessment of DAC plants operated by Climeworks, based on industrial data.
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Cites
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Self-citation
Cited by
Porous materials for carbon dioxide separations
Siegelman, R. L., Kim, E. J., & Long, J. R. (2021) · Nature Materials · doi:10.1038/s41563-021-01054-8 · Cited by 722
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Direct air capture: process technology, techno-economic and socio-political challenges
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A comparative energy and costs assessment and optimization for direct air capture technologies
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Metadata
- Authors
- Deutz, S., & Bardow, A.
- Venue
- Nature Energy
- Published
- 2021-02-04
- Volume
- 6
- Issue
- 2
- Pages
- 203-213
- ISSN
- 2058-7546 (ISSN-L)
- OpenAlex
- W3128637235
- Cited by
- 605
- References
- 15
- FWCI
- 37.92
- Type
- journal article
- Language
- en
- Open access
- green
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