Solid DAC (S-DAC)
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Technology Description
Solid direct air capture (S-DAC) is a technology that aims to capture CO2 from the atmosphere and either use it as a feedstock or store it underground. S-DAC is based on solid adsorbents operating through an adsorption/desorption cycling process. While the adsorption takes place at ambient temperature and pressure, the desorption happens through a temperature–vacuum swing process, where CO2 is released at low pressure and medium temperature (80-120°C). A single adsorption/desorption unit has a
capture capacity of several tens of tonnes of CO2 per year and can be used to extract water from the atmosphere where local conditions allow. An S-DAC plant is designed to be modular and can include as many units as needed.
Relevance for Net Zero
DAC can provide carbon removal services when the captured CO2 is stored underground and exceeds the amount of emissions generated to build, install and operate the plant over its lifetime.
Key Countries
Switzerland, Germany, Iceland, Italy, Netherlands, United States, Oman, Chile, Norway
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