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OWOE - Cool Tech - Creating diesel fuel from air and water
  Audi just created diesel fuel from air and water
 
Audi just created diesel fuel from air and water
 
Creating diesel fuel from air and water

Audi is making a new fuel for internal combustion engines - a synthetic diesel that is made from just water and carbon dioxide. The company's pilot plant, which is operated by German startup Sunfire in Dresden, produced its first batches of the "e-diesel" in April 2015. The base fuel is referred to as "blue crude," and begins by taking electricity from renewable sources like wind, solar or hydropower and using it to produce hydrogen from water via reversible electrolysis. The hydrogen is then mixed with CO2 that has been converted into CO in two chemical processes, and the resulting reactions produce a liquid made from long-chain hydrocarbons - this is blue crude, which is then refined to create the end product, the synthetic e-diesel.

Audi says that the carbon dioxide used in the process is currently supplied by a biogas facility but, further adding to the green impacts of the process, some of the CO2 is captured directly from the ambient air, taking the greenhouse gas out of the atmosphere. Another plus - the fuel is sulphur free.

The Dresden pilot plant has the capacity to produce about 42 gallons of synthetic diesel per day. Audi and Sunfire are preparing to build a bigger plant to commercialize the process, subject to getting a first sales order.


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