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Title: Direct air capture of CO 2 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 CO 2 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, CO 2 absorption is achieved with readily available and environmentally friendly aqueous amino acid solutions (glycine and sarcosine) using a household humidifier. The CO 2-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 CO 2 release and near-quantitative regeneration of the guanidine compound are achieved by relatively mild heating of the carbonate crystals using concentrated solar power.

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
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. doi: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. doi: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 = {2018},
month = {5}
}

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    Works referencing / citing this record:

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    CO 2 absorption from simulated flue gas in a bubble column
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