Climeworks has built its first commercial CO2 capture plant, with a deal secured to sell the captured gas to a customer.

The plant will be operational by mid-2016 and annually capture 900 tonnes of CO2 from the atmosphere, enhancing the growth of vegetables und lettuce in a nearby greenhouse of Gebrüder Meier Primanatura AG by up to 20%.

The main goal of the project, with development and building costs of €3 to 4m, is to industrialise Climeworks’ unique Direct Air Capture (DAC) technology and continuously operate an industrial scale plant that captures CO2 from ambient air.

The plant, which will be constantly delivering CO2, is constructed as part of a three-year pilot and demonstration project with Gebrüder Meier and Zweckverband Kehrichtverwertung Zürcher Oberland KEZO (a municipal waste disposal company), which is subsequently powering the DAC plant with heat and electricity. The high purity CO2 product is then delivered to a neighbouring greenhouse operated by the Gebrüder Meier Primanatura AG. The gas is injected into the greenhouse atmosphere in order to enhance the growth of vegetables and lettuce by up to 20%.

The project is supported by the Swiss Federal Office of Energy (SFOE).

Another goal is to determine the plants’ operational costs, which is currently controversially discussed in the research community. This is an important finding in order to define business models for implementing the technology internationally.

The project is a crucial milestone in supporting Climeworks’ vision to close the carbon cycle due to the fact, that it allows a technology transfer from a novel technology originally developed at ETH Zurich and EMPA for industrial application. Furthermore, it will deliver reliable mass and energy balances as well as economic data as basis for further Climeworks systems on industrial scale.

Based on the results of this project Climeworks’ product will be further industrialized to eventually supply air captured CO2 to Power-to-Gas/Power-to-Liquids technologies to efficiently store renewable electricity by producing synthetic fuels. These fuels, produced from atmospheric CO2, water and renewable electricity are carbon-neutral and not in competition with food production for agriculture.

Climeworks’ technology enables a closed carbon cycle, where CO2 emitted from any source or even the past can be captured and re-used for the production of carbon- neutral fuels. In the short-term Climeworks’ technology shall be used to supply CO2 for beverage companies, currently receiving its CO2 majorly as waste product from industry, in turn stemming from the combustion of fossil fuels.

The Climeworks CO2 capture technology is based on a cyclic capture / regeneration process and a novel filter. During the capture process, atmospheric CO2 is chemically bound to the surface of the filter. Once the filter is saturated, the CO2 is released by heating it to a temperature of about 100°Celsius (212°F), thereby delivering high-purity gaseous CO2. The CO2-free filter can be re-used for numerous capture /regeneration cycles.