Solid Sorbent DAC Compared with Electrochemical DAC
WHITE PAPER
25 October 2025
By Prof. Don MacElroy (Professor Emeritus in Chemical Engineering, University College Dublin, and Chairman of the NEG8 Carbon Advisory Board) and Jeannie De Vynck
Solid sorbent Direct Air Capture (DAC) and electrochemical DAC are two leading technologies for removing carbon dioxide (CO2) from ambient air. Both approaches have distinct processes, energy needs, and opportunities to reduce costs.
This white paper gives a useful comparison of solid sorbent DAC and electrochemical DAC, focusing on the main areas that shape their use and scale-up.
- How each DAC method works
- Energy requirements and heat use
- Cost and commercial readiness
- Site suitability and integration
- Technical limits and scale-up challenges
- Role in future CO₂ removal pathways
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