Adsorption artificial tree for atmospheric carbon dioxide capture, purification and compression

The current concentration of carbon dioxide in the atmosphere demands for development of negative emission solutions such as direct carbon dioxide removal from the atmosphere (air capture). Many well-established processes can remove carbon dioxide from the atmosphere but the real technological chall...

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Bibliographic Details
Published in:Energy (Oxford) 2018-11, Vol.162, p.1158-1168
Main Authors: Santori, Giulio, Charalambous, Charithea, Ferrari, Maria-Chiara, Brandani, Stefano
Format: Article
Language:English
Subjects:
Adsorption
Atmosphere
Atmospheric carbon dioxide
Atmospheric pressure
Carbon dioxide
Carbon dioxide concentration
Carbon dioxide removal
Carbon sequestration
Carbon sources
Compressing
Compression
Compressors
Direct air capture
Emissions
Energy consumption
Energy sources
Energy storage
Geology
Global warming
Negative emission technology
Purification
Regeneration
Temperature swing adsorption
Zeolites
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Summary:The current concentration of carbon dioxide in the atmosphere demands for development of negative emission solutions such as direct carbon dioxide removal from the atmosphere (air capture). Many well-established processes can remove carbon dioxide from the atmosphere but the real technological challenge consists of concentrating and compressing carbon dioxide at the conditions for long term geological storage, with efficient use of non-fossil energy sources. A thermally-driven, negative-carbon adsorption process for capture, purification and compression of carbon dioxide from air is proposed. The process is based on a series of batch adsorption compressors of decreasing size to deliver a compressed carbon dioxide stream to a final storage. Thermodynamic analysis of the process shows that, by exploiting the equilibrium properties of commercial and non-commercial materials, carbon dioxide can be produced at specifications appropriate for geological storage. By operating the process with zeolite 13X at regeneration temperature of 95 °C, a final storage vessel can be pressurized with carbon dioxide at purities >0.95 mol fraction and specific energy consumption 0.97 mol fraction. [Display omitted] •A simple heat-powered carbon-negative process is analysed for air capture.•The process can remove, compress and purify carbon dioxide by using low grade heat.•The process meets the specifications required to direct air capture.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2018.08.090