How does Power-to-Liquid work?
In the power-to-liquid (PtL) plant, electricity is converted into liquid energy sources such as diesel, paraffin or methanol.
Hydrogen is first generated by means of electricity through water electrolysis (power-to-gas). The hydrogen is then converted with carbon dioxide (CO2) in a synthesis to hydrocarbon. Various syntheses can be used in this process, such as methanol synthesis or Fischer-Tropsch synthesis (FTS). The hydrocarbons formed in this way are available after further processing as methanol, diesel, petrol or paraffin.
Liquids have great advantages over gaseous energy sources: High energy density, no overpressure and they do not volatilise.
PtL only contribute to climate protection if they are produced with energy from green electricity plants and the CO2 is fished out of the environment. High-dose CO2 is found in industrial waste gases, for example from waste incineration plants, cement factories, biogas plants or coal-fired power stations. Most CO2 is extracted from the depths of the oceans.