Audi has announced the production of first liters of the Audi e-diesel in collaboration with Sunfire, a Dresden (Germany) based cleantech company. The production technology is known as ‘Power to Liquid’ and requires only carbon di oxide and water to make diesel.
The synthesis of Audi e-diesel involves the high temperature electrolysis of water. The resulting hydrogen further reacts with carbon di oxide to produce a liquid called ‘Blue Crude’ made up of long chain hydrocarbons. The Blue Crude is refined to Audi-e –diesel, a fuel with high cetane number and without sulphur or aromatic hydrocarbon impurities.
The efficiency of the process is stated to be 70%.
The pilot plant at Dresden is owned by Sunfire. it is expected to produce 3000 liters of Audi e-diesel in the coming months. It was commissioned in November 2014 and took only 5 months to start production.
The Sunfire project is being supported by the Federal Ministry of Education and Research Germany.