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)

Phase 4: Mobile Synthesis Unit (MOBSU)

Fischer-Tropsch synthesis is used in our newly designed Mobile Synthesis Unit (MOBSU) to combine carbon and hydrogen and produce valuable gas, liquid and solid products for various uses.

We are currently working on two different production lines which are tailored for either natural gases or liquid and wax component production. These units are positioned side by side inside the Mobile Synthesis Unit.

The methanation production line produces synthetic natural gas (i.e. methane) from CO2 and H2 by using Sabatier reaction. Synthetic natural gas can replace traditional, fossil-derived natural gas without any problems. The reactor will be VTT in-house design with a nickel-based catalyst. Operating temperature for the methane production is around 300 °C in mildly elevated pressure. (not presented in the animation)

Soletair Fischer-Tropsch synthesis can be tailored to suit different production needs.

The Fischer-Tropsch production line has two major steps. First, we will alter CO2 to a more useful component, CO. This is done by reverse water gas shift reaction (rWGS) in which a gas mixture of CO, CO2, H2 and H2O is balanced at high temperature of 800 °C with the help of a precious metal catalyst. The reactor operates at the same pressure as the following Fischer-Tropsch synthesis in order to avoid compression between process steps. The design of rWGS reactor and the catalyst is VTT in-house know-how.

Secondly, carbon monoxide and hydrogen are reacting to hydrocarbons in the Fischer-Tropsch reactor. Our project partner, IneraTec GmbH, has designed and manufactured this ultra-compact and efficient reactor. Fischer-Tropsch reaction produces a wide range of products from light hydrocarbon gases like methane, to liquid components like diesel and up to more solid wax components.

The main parts of Fischer-Tropsch module are the intensified reactor, a hot trap to condense the wax products, and a cold trap to condense the liquid products. Our Fischer-Tropsch unit has a cobalt catalyst in a novel compact reactor with integrated water evaporation cooling cycle.

Mobile Synthesis Unit is positioned in 2.5 x 9.1 x 3 m sea container and easily transportable. It contains both Fischer-Tropsch and methanation reactors together with a sophisticated control room.

Phase 5: Refinining of renewable products

Phase 6: Renewable consumer products

Specific calculations

  • FT Products


  • Energy Consumption


  • CO2 Input


  • Water Consumption



Would you like to know more about the process? We have prepared you specific calculations about energy efficiency and output figures in different stages of the Soletair process.

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