The potential of direct air capture using adsorbents in cold climates

Summary: Global warming threatens the entire planet, and solutions such as direct air capture (DAC) can be used to meet net-zero goals and go beyond. This study investigates using DAC in a 5-step temperature vacuum swing adsorption (TVSA) cycle with adsorbents’ Li-X and Na-X, readily available indus...

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Bibliographic Details
Published in:iScience
Main Author: Sean M.W. Wilson
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2022
Subjects:
Engineering
Energy engineering
Mechanical engineering
Science
Q
Canada
Greenland
Antarc*
Antarctica
Alaska
Online Access:https://doi.org/10.1016/j.isci.2022.105564
https://doaj.org/article/1df89aa4712c45dfb1cc0f4616e20d09
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Summary:Summary: Global warming threatens the entire planet, and solutions such as direct air capture (DAC) can be used to meet net-zero goals and go beyond. This study investigates using DAC in a 5-step temperature vacuum swing adsorption (TVSA) cycle with adsorbents’ Li-X and Na-X, readily available industrial zeolites, to capture and concentrate CO2 from air in cold climates. From this study, we report that Na-X in cold conditions has the highest known CO2 adsorption capacity in air of 2.54 mmol/g. This combined with Na-X's low CO2 heat of adsorption, and fast uptake-rate in comparison to other benchmark materials, allowed for Na-X operating in cold conditions to have the lowest reported DAC operating energy of 1.1 MWh/tonCO2. These findings from this study show the promise of this process in cold climates of Canada, Alaska, Greenland, and Antarctica to be part of the solution to global warming.

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