Last month, gasworld reported that Swiss direct air capture (DAC) company Climeworks said it will construct a new plant in Iceland that will be able to permanently remove 4,000 tonnes of CO2 from the air per year.

Today, in the project’s latest development, German vehicle manufacturer Audi has said it is partnering with the environmental-start up and will promote a future technology with the project.

The Icelandic facility draws in air and feeds it into the CO2 collector, which contains a selective filter material that uses an adsorbent to bind the CO2 in the air. When the filter is saturated with CO2, it is heated to 100°C using water from nearby geothermal plants to release the CO2 molecules.

Water from the plant then flows through the facility and transports the CO2 roughly 2,000 meters underground. The CO2 molecules react through natural mineralisation processes with the basalt rock and are converted to carbonates over a period of several years.

The water then returns to the cycle of the geothermal power plant. The facility will operate 24/7 and will filter 4,000 metric tonnes from the atmosphere, one quarter of which will be credited to Audi.

Hagen Seifert, Head of Sustainable Product Concepts at Audi, said, “From a scientific perspective, the adsorption of CO2 from the atmosphere is an important measure in addition to reducing emissions for reaching the group’s climate targets.”

“We are contributing to decarbonisation through our involvement in the Climeworks CO2 capture project.”

Audi has been supporting the development of CO2 capturing technology from Climeworks since 2013. Two years ago, the companies built a facility in Switzerland that filters CO2 from the air and provides it to the beverage industry.