Reducing the Cost of Ca-Based Direct Air Capture of CO2

Zeman, Frank

doi:10.1021/es502887y

Cited by 85Carbon Dioxide Capture TechnologiesCO2 Sequestration and Geologic InteractionsIndustrial Gas Emission Control

Reducing the Cost of Ca-Based Direct Air Capture of CO2

Zeman, Frank·2014·Environmental Science & Technology

DOI 10.1021/es502887y

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Abstract

Direct air capture, the chemical removal of CO2 directly from the atmosphere, may play a role in mitigating future climate risk or form the basis of a sustainable transportation infrastructure. The current discussion is centered on the estimated cost of the technology and its link to "overshoot" trajectories, where atmospheric CO2 levels are actively reduced later in the century. The American Physical Society (APS) published a report, later updated, estimating the cost of a one million tonne CO2 per year air capture facility constructed today that highlights several fundamental concepts of chemical air capture. These fundamentals are viewed through the lens of a chemical process that cycles between removing CO2 from the air and releasing the absorbed CO2 in concentrated form. This work builds on the APS report to investigate the effect of modifications to the air capture system based on suggestions in the report and subsequent publications. The work shows that reduced carbon electricity and plastic packing materials (for the contactor) may have significant effects on the overall price, reducing the APS estimate from $610 to $309/tCO2 avoided. Such a reduction does not challenge postcombustion capture from point sources, estimated at $80/tCO2, but does make air capture a feasible alternative for the transportation sector and a potential negative emissions technology. Furthermore, air capture represents atmospheric reductions rather than simply avoided emissions.

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DACCS costs have been modeled to decline well below $100 per tCO2 for example in combination with low-cost PV, batteries and heat pumps in 2050 in favorable locations.
“DACCS cost have been modeled to decline well below $100 per tCO 2 54,55,68 for example in combination with low-cost PV, batteries and heat pumps in 2050 in favorable locations.45”
From The mutual dependence of negative emission technologies and energy systems (2019) · cites this paper as [68]

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Authors: Zeman, F.
Affiliations: Royal Military College of Canada (CA)
Corresponding author: Zeman, Frank
Venue: Environmental Science & Technology
Publisher: American Chemical Society (ACS)
Published: 2014-09-10
Volume: 48
Issue: 19
Pages: 11730-11735
ISSN: 0013-936X (ISSN-L)
1520-5851
DOI: 10.1021/es502887y
OpenAlex: W2330912520
Cited by: 84
References: 36
Citations by year: 2026: 5 · 2025: 10 · 2024: 13 · 2023: 14 · 2022: 8 · 2021: 4 · 2020: 6 · 2019: 8 · 2018: 6 · 2017: 2 · 2016: 6 · 2015: 2
FWCI: 3.88
Type: journal article
Language: en
Open access: closed
Locations: Environmental Science & Technology (publishedVersion)
PubMed (publishedVersion)
Topics: Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
Physical Sciences › Engineering › Mechanical Engineering › Industrial Gas Emission Control
Keywords: direct air capture, CO2 capture cost, carbon dioxide removal, post-combustion CO2 capture, transport decarbonization, CO2 sequestration
MeSH terms: Air Pollution, Carbon Dioxide, Climate, Commerce, Costs and Cost Analysis, Electricity, Engineering, Fossil Fuels, Power Plants, Environmental Restoration and Remediation, Carbon Sequestration

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Reducing the Cost of Ca-Based Direct Air Capture of CO2

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