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)

Phase 5: Refinining of renewable products

The renewable product stream from the Mobile Synthesis Unit is a mixture of hydrocarbons ranging from light gaseous products to liquids and even solid paraffin waxes. The share of each type of product varies a lot depending on the reaction conditions and the catalyst used in the Fischer-Tropsch reaction. It is essential to utilize all of these products fully to make an economically feasible process.

The renewable product that is in gaseous form at room temperature consists of methane, the main component of natural gas, and other light hydrocarbons. It is easy to separate the gaseous fraction from the liquid and solid products. In larger refineries light olefins – ethylene, propylene and butenes – are separated from this fraction. These basic petrochemicals form the basis for the manufacture of a wide range of plastics and other products. On the other hand, the light paraffins generally known as Liquefied Petroleum Gas, are sold to customers to be used for instance in stoves, grills and refrigerators. In smaller scale such as in the case of the Mobile Synthesis Unit, the preferred use of the gaseous fraction is for energy.

Refining the hydrocarbons from gaseous to solid products.

The liquid product can be fractioned by distillation to renewable gasoline and middle-distillate hydrocarbons. The gasoline fraction is further hydrotreated and reformed over a platinum catalyst in order to increase its octane number and to improve other characteristics for motor use. The middle-distillate fraction is also hydrotreated and thereafter distilled to renewable jet-fuel and/or diesel.

There is only limited use for the wax fraction in special applications such as candles or white oils for consumer products. However, it is possible to hydrocrack the waxes to diesel and jet-fuel and to lesser extent to gasoline. These products can then be combined with the distilled liquid products.

The wide range of Fischer-Tropsch products offers a lot of flexibility in tailoring the product. For instance, instead of motor fuel, the Fischer-Tropsch products can be refined to renewable petrochemicals such as olefins or aromatics and the further upgraded to isocyanates, which are the building blocks for polyurethane foams.

Phase 6: Renewable consumer products

Specific calculations

  • FT Products


  • Energy Consumption


  • CO2 Input


  • Water Consumption



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