Water, CO2 and green power are the ingredients for Audi e-diesel
Audi Handout
By Kevin McSpadden
April 28, 2015

An Audi research facility in Dresden, Germany, has managed to create the first batches of diesel fuel with a net-zero carbon footprint — made from carbon dioxide (CO2), water and renewable energy sources such as wind or solar power.

Germany’s government has welcomed the new technology, created in partnership with a greentech company called Sunfire. Johanna Wanka, Germany’s Federal Minister of Education and Research, even test drove the fuel and called it, “a crucial contribution to climate protection and the efficient use of resources,” according to an Audi press release.

Manufacturing involves first breaking down steam into hydrogen and oxygen through high-temperature electrolysis. The hydrogen then reacts with CO2 to create a liquid called “blue crude.” This is then refined to make the e-diesel.

A visual infographic released by Audi explains the steps in detail.

Audi Handout

The next stage for the project will be industrial scale production because Sunfire only has capacity to produce 3,000 liters (792.5 gal.) of e-diesel in coming months.

“If we get the first sales order, we will be ready to commercialize our technology,” said Sunfire CTO Christian von Olshausen in a company press release.

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