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Liquid DAC (L-DAC)

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Technology Description

Liquid direct air capture (L-DAC) is a technology that aims to capture CO2 from the atmosphere and either use it as a feedstock or store it underground. L-DAC is based on two closed chemical loops. The first loop takes place in a unit called the contactor, which brings atmospheric air into contact with an aqueous basic solution (such as potassium hydroxide), capturing CO2. The second loop releases the captured CO2 from the solution in a series of units operating at high temperature (between 300°C and 900°C). A large-scale L-DAC plant can capture around 0.5-1 MtCO2/year from the atmosphere. Water top-up may be required depending on local weather conditions.

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

Canada, United States, United Kingdom, Norway

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