Audi is testing a new form of liquid to put in its cars, claiming the e-diesel it's testing mixes the CO2 in the air with water and electricity from sustainable sources to create a viable future alternative to petrol and diesel.
The e-diesel is being produced for Audi's testers by Sunfire, a company that wants to show that it can mass produce this alternative fuel. It uses only carbon dioxide, water and electricity to make, in a process that electrolyses the chemicals at a high temperature to split the bonds and turn water into hydrogen and oxygen.
The some more complicated stuff happens in a factory -- the end result being what Sunfire calls blue crude, or an energy-dense hydrocarbon liquid that can then be refined into a fuel for cars. Audi already has an A8 TDI running on the stuff, and with a claimed energy efficiency of 70 per cent, the fuel has potential not just for running cars but also harnessing wind power to make an eco-friendly method of storing sustainable energy in liquid form.
Audi's Reiner Mangold said: "In developing Audi e-diesel we are promoting another fuel-based on CO2 that will allow long‑distance mobility with virtually no impact on the climate. Using CO2 as a raw material represents an opportunity not just for the automotive industry in Germany, but also to transfer the principle to other sectors and countries." [Audi via IBT]