Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power
Abstract
Using negative emissions technologies for the net removal of greenhouse gases from the atmosphere could provide a pathway to limit global temperature rises. Direct air capture of carbon dioxide offers the prospect of permanently lowering the atmospheric CO2 concentration, providing that economical and energy-efficient technologies can be developed and deployed on a large scale. Here in this paper, we report an approach to direct air capture, at the laboratory scale, using mostly off-the-shelf materials and equipment. First, CO2 absorption is achieved with readily available and environmentally friendly aqueous amino acid solutions (glycine and sarcosine) using a household humidifier. The CO2-loaded solutions are then reacted with a simple guanidine compound, which crystallizes as a very insoluble carbonate salt and regenerates the amino acid sorbent. Finally, effective CO2 release and near-quantitative regeneration of the guanidine compound are achieved by relatively mild heating of the carbonate crystals using concentrated solar power.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1460227
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Energy
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 7; Journal ID: ISSN 2058-7546
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 54 ENVIRONMENTAL SCIENCES
Citation Formats
Brethome, Flavien M., Williams, Neil J., A Seipp, Charles, Kidder, Michelle, and Custelcean, Radu. Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power. United States: N. p., 2018.
Web. doi:10.1038/s41560-018-0150-z.
Brethome, Flavien M., Williams, Neil J., A Seipp, Charles, Kidder, Michelle, & Custelcean, Radu. Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power. United States. https://doi.org/10.1038/s41560-018-0150-z
Brethome, Flavien M., Williams, Neil J., A Seipp, Charles, Kidder, Michelle, and Custelcean, Radu. Mon .
"Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power". United States. https://doi.org/10.1038/s41560-018-0150-z. https://www.osti.gov/servlets/purl/1460227.
@article{osti_1460227,
title = {Direct air capture of CO2 via aqueous-phase absorption and crystalline-phase release using concentrated solar power},
author = {Brethome, Flavien M. and Williams, Neil J. and A Seipp, Charles and Kidder, Michelle and Custelcean, Radu},
abstractNote = {Using negative emissions technologies for the net removal of greenhouse gases from the atmosphere could provide a pathway to limit global temperature rises. Direct air capture of carbon dioxide offers the prospect of permanently lowering the atmospheric CO2 concentration, providing that economical and energy-efficient technologies can be developed and deployed on a large scale. Here in this paper, we report an approach to direct air capture, at the laboratory scale, using mostly off-the-shelf materials and equipment. First, CO2 absorption is achieved with readily available and environmentally friendly aqueous amino acid solutions (glycine and sarcosine) using a household humidifier. The CO2-loaded solutions are then reacted with a simple guanidine compound, which crystallizes as a very insoluble carbonate salt and regenerates the amino acid sorbent. Finally, effective CO2 release and near-quantitative regeneration of the guanidine compound are achieved by relatively mild heating of the carbonate crystals using concentrated solar power.},
doi = {10.1038/s41560-018-0150-z},
journal = {Nature Energy},
number = 7,
volume = 3,
place = {United States},
year = {Mon May 07 00:00:00 EDT 2018},
month = {Mon May 07 00:00:00 EDT 2018}
}
Web of Science
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