Audi e-Fuels project produces sulfur-free e-Diesel

Audi e-Fuels project produces sulfur-free e-Diesel image

Text: Eric Tipan / Photos: Audi | posted November 18, 2014 07:40

Produces diesel fuel from water, CO2 and green electricity

Audi, in cooperation with partners Climeworks and sunfire has officially opened up the first plant that develops CO2-neutral fuels showing that it is indeed possible to industrialize e-fuels.

On hand for the plant inauguration was Prof. Dr. Johanna Wanka, German Federal Minister for Education and Research and Dr. Hagen Seifert, Head of Environmental Assessments, Renewable Energies and New Materials at AUDI AG.

The process requires carbon dioxide, water and electricity as raw materials.  Carbon dioxide is simply taken from the ambient air while the water is split into hydrogen and oxygen using green electricity.  The hydrogen, using two chemical processes, is then reacted with the carbon dioxide at 220 degrees Celsius and at a pressure of 25 bar to produce an energetic liquid made up of hydrocarbon compounds.  This is called Blue Crude.

Currently, the plant can produce 160 liters of Blue Crude per day and nearly 80% of it can be converted into synthetic fuel.

Referred to as Audi e-diesel, it is free of sulfur, aromatics and has a high cetane number, which means it will ignite easily.  Its composition allows it to be used with any current fuel loaded in your tank meaning it can be used as drop-in fuel.

These positive results would not have been possible without the previous two years of research and preparation.

Audi is the exclusive partner of this program in the automotive industry.