Switzerland-based business Climeworks has presented its efficient carbon dioxide (CO2) capture technology at the COP22 Climate Change Conference in Marrakech as companies and countries unite in climate protection.

Climeworks revealed its aim to capture 1% of total global CO2 emissions by 2025 with its CO2 Direct Air Capture (DAC) technology, which is based on a cyclic capture-regeneration process and a novel filter that captures CO2 from ambient air.

During adsorption, atmospheric CO2 is chemically bound to the sorbent’s surface and once saturated, the sorbent is heated to 100°C to drive off and deliver high-purity, gaseous CO2. The DAC technology is currently patent-pending.

According to the company, its DAC technology can be freely scaled to meet the demands of any application by changing the number of modules, and as such has a sufficient carbon removal potential to meet the climate targets agreed upon in the Paris Agreement (COP21). 

Climeworks co2 capture plant

Source: Climeworks

In the short-term, Climeworks will sell its air-captured CO2 to large merchant markets in the greenhouse and beverage sectors before moving onto provide atmospheric CO2 for low-carbon fuel production in the mid-term. A press release signified that this will “allow large-scale storage of renewable energies and which further allows CO2 sources which are otherwise hard to capture to be addressed.”

In the long-term and in combination with relevant storage technology, it is understood that DAC is one of only few technologies with the potential to capture and permanently remove several gigatonnes of atmospheric CO2 each year.

Climeworks commissioned its first industrial-scale CO2 capture unit in late 2014 dubbed the ‘CO2 Collector’, which captures 50 tonnes of CO2 per year. The company is currently assembling its first commercial DAC plant which will capture up 900 tonnes of CO2 per year and is due to be commissioned early next year.