Feasibility Concern|DACCS Capacity
Why this criterion? This scenario assumes a high deployment of Direct Air Capture with Carbon Storage (DACCS).
DACCS is a technology that is very immature today. Moreover, CO₂ is captured directly from the atmosphere, which has a much lower CO₂ concentration than flue gases from points sources (e.g. a cement or waste-incineration plant), the purification of CO₂ is much harder and cannot be achieved with established carbon capture technologies.
In summary, this causes DACCS to be a technology that will likely take a long time to develop and scale up.
Why this threshold? "If DACCS growth mirrors high-growth analogs (e.g., solar photovoltaics), it can reach up to 4.9 GtCO2 removal by midcentury" (Edwards, 2024).
Based on this work, we assume the following threshold:
• Upper, medium concern in 2050: 4,900 Mt CO₂/yr.
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Sources
| Identifier | Bibliographic information | Links |
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Morgan R. Edwards, Zachary H. Thomas, Gregory F. Nemet, Sagar Rathod, Jenna Greene, Kavita Surana, Kathleen M. Kennedy, Jay Fuhrman, and Haewon C. McJeon. Modeling direct air carbon capture and storage in a 1.5 °C climate future using historical analogs. Proceedings of the National Academy of Sciences, May 2024. | DOI |