Technical specifications

SOLETAIR process aims for 100% renewable solution, which combines CO2 from air and electricity from sun into sustainable consumer products. Our demonstration facility includes a solar field and three mobile container units: electrolyzer for hydrogen production, direct air capture for CO2 production and intensified synthesis reactors for hydrocarbon production. Our ambition is to integrate these units successfully and demonstrate that 100% renewable future is possible

Phase 1: Renewable energy

Phase 2: Hydrogen production

Phase 3: Direct Air Capture (DAC)

Direct air capture (DAC) is the carbon source of the SOLETAIR project. DAC falls under the class of carbon sequestration technologies. However, direct air capture is the only carbon capture technology that can directly capture CO2 previously emitted in the atmosphere. When surplus renewable energy drives the unit, DAC has the potential of being 100% negative carbon emission technology.

The current DAC unit is a modified version of air-scrubbing units for civil shelters. The main principle for collecting carbon dioxide is adsorption/desorption process using solid amine sorbents. The sorbents used in the direct air capture unit are amine-functionalized polystyrene spherical beads.

Direct Air Capture (DAC) captures the CO2 previously emitted in the atmosphere.

Direct air capture of carbon is as follows: (1) Ambient air is introduced to the resin bed by fans. As air passes through the bed, CO2 reacts with the amine in the resin via chemisorption. In parallel water is also physically adsorbed. N2 and O2, major components of air, pass the bed unabsorbed. (2) Next is purging, pneumatic valves are closed and high vacuum is applied to remove air in the bed. (3) The bed is then heated to 80°C, to reverse the adsorption reaction and produce gas (CO2, H2O) in bed. (4) Finally, heating and vacuuming is continuously applied for two hours to collect the product CO2. Water is removed via air-cooled heat exchanger.

The current direct air capture set-up is modular with dimension 340 cm (L) x 220 cm (W) + 242 cm (H). This allows the unit to be deployed easily as part of a power-to-gas / power-to-liquid /power-to-X system or as a standalone decentralized carbon source for CO2 utilization. The DAC is designed to produce 3800 g/day of CO2. It can be operated manually or via time based automation using Siemens Simatic system.

Phase 4: Mobile Synthesis Unit (MOBSU)

Phase 5: Refinining of renewable products

Phase 6: Renewable consumer products

Specific calculations

  • FT Products


  • Energy Consumption


  • CO2 Input


  • Water Consumption



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