Direct air capture (DAC) refers to a range of technologies that capture and concentrate carbon dioxide (CO2) from ambient air. These technologies can include chemical scrubbing processes that capture CO2 through absorption or adsorption separation processes. DAC can also refer to the process that involves rapid mineralization of CO2 at the Earth’s surface, termed mineral carbonation.
On October 5, 2017, the National Academies of Sciences, Engineering, and Medicine conducted a webinar-based panel discussion that explored the limitations, appropriate scale, and future costs (both capital and energy) of DAC technologies. Panelists described technological readiness, current research needs, and potential environmental impacts of DAC. The National Academies then held a workshop on October 24, 2017, in Irvine, CA, to examine the scientific questions relevant to developing a research and development plan for DAC moving forward, and to assess co-benefits, costs, and barriers to implementation of this technology at significant scales. This publication summarizes the presentations and discussions from these events.
National Academies of Sciences, Engineering, and Medicine. 2018. Direct Air Capture and Mineral Carbonation Approaches for Carbon Dioxide Removal and Reliable Sequestration: Proceedings of a Workshop–in Brief. Washington, DC: The National Academies Press. https://doi.org/10.17226/25132.
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