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Climeworks Carbon Dioxide Removal

Climeworks | Climeworks empowers people to reverse climate change by permanently removing carbon dioxide from the air. The carbon is injected underground and naturally turns into stone, which makes this one of the safest storage solutions available. The carbon remains stored underground for thousands of years.

Project type

Technology-based

Project field

Direct Air Capture

Location

Iceland

Price

€999 / tonne

One of two things happens to the Climeworks air-captured carbon dioxide: either it is upcycled to climate-friendly products such as carbon-neutral fuel or it is returned to earth, stored safely and permanently away for millions of years in a process called carbon dioxide removal. While offsets, for example, prevent additional CO2 from entering the atmosphere, Climeworks’ carbon dioxide removal actively removes carbon dioxide that has already been emitted, thus reducing the amount of CO2 in the atmosphere. Climeworks has 14 plants in operation across Europe.

For example, in Hellisheiði, Iceland, CO2 is captured from the air with Climeworks’ direct air capture technology. Climeworks’ CO2 collectors selectively capture carbon dioxide in a two-step process. First, air is drawn into the collector with a fan. Carbon dioxide is captured on the surface of a highly selective filter material that sits inside the collectors. Second, after the filter material is full with carbon dioxide, the collector is closed. The temperature is increased to between 80 and 100 °C - this releases the carbon dioxide. Finally, high-purity, high-concentration carbon dioxide can be collected.

In a second step, the CO2 is mixed with water and pumped deep underground by Climeworks’ partner Carbfix. Through natural mineralization, the carbon dioxide reacts with the basaltic rock and turns into stone within a few years. The permanence of this carbon dioxide removal solution is unique and this engineered process can measure exactly how much CO2 has been removed from the air.

The Climeworks direct air capture technology runs exclusively on clean energy, and the modular CO2 collectors can be stacked to build machines of any size. Grey emissions are below 10%, which means that out of 100 tons of carbon dioxide that our machines capture from the air, at least 90 tons are permanently removed and only up to 10 tons are re-emitted.

Founded by the engineers Christoph Gebald and Jan Wurzbacher, Climeworks strives to inspire 1 billion people to act now and remove carbon dioxide from the air.

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