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GreenCap Solutions uses a solid adsorbent DAC (Direct air capture) design based on a non-functionalized commercially available AI-SI microporous zeolite. Zeolite adsorption beds utilise physisorption which faces different challenges in capturing CO2, but do not suffer from problems associated with amines such as potential degradation of chemicals and subsequent production of toxic substances. Lifetime for zeolite adsorbent in these applications is up to 10 years.

The GreenCap Solutions DAC system starts with air being drawn in by a fan and this incoming air is dehydrated and then cooled to temperatures between minus 30 to minus 40 degrees Celsius. Carbon dioxide is adsorbed as it passes through the zeolite bed until the bed is saturated. To regenerate the bed and release the captured CO2, a temperature of 200 degree Celsius is applied. This process is energy demanding, but demand is offset by the use of waste heat. A full adsorption/desorption cycle usually takes 20 hours, with two cycles run in opposite directions simultaneously to enable CO2 production. The company uses a fully electric system, utilising heat pumps and waste energy.

Increases yield and stops emissions

The benefits of using the GreenCap Solutions technology are many. For Agtech, installing the DAC and ECS technology represent a solution in which can significantly increase production yields, reduce water consumption, lower energy consumption, and stop emissions. For industry, switching to a fully sustainable CO2 source will have significantly environmental impact in making all products environmentally friendly, stop emissions and convert into a net zero regime. While for DAC farming the removal of already emitted CO2 concentrations will reduce the overall global CO2 concentration and help make the future targets for net zero by 2050.

Market potential

Following today stated policies, IEA (International Energy Agency) has presented a graph that shows an estimated need for CO2 capture by 2040 to total around 35 billion tonnes, of which around 9 % (3,15 billion) needs to come from DAC – on an annual basis.

GreenCap Solutions technology has a broad area for application:

  • AGTECH – sustainable co2 production within food production – controlled indoor farming (greenhouses-vertical farming-urban farming)
  • INDUSTRY – sustainable CO2 production (“utilisation”) or removal within industrial applications. Examples: CO2 removal from production of lithium batteries, CO2 as a component within energy production (hydrogen, methanol etc.) and/or CO2 as component in producing syntetic efuels/SAF.
  • DAC FARMING– sustainable CO2 capture from air to be used for permanent removal- storage (CCS)
  • About the company

    GreenCap Solutions is an environmental technology company founded in 2016, by the three founders with extensive carbon capture experience in close collaboration with industrial group BR Industrier. GreenCap Solutions completed its proof-of-concept pilot in 2019, combining DAC with greenhouse climate control. The first commercial project was delivered in 2022. In 2023, GreenCap Solutions opened its Z50 DAC demonstration plant with a carbon dioxide removal capacity of 50TPA (tonnes per annum).