Sunlight + carbon dioxide = fuel

Scientists from Sandia National Laboratories have shown a working prototype of a device capable of converting carbon dioxide and water into synthetic fuel.

The device, called the CR5 (Counter Rotating Ring Receiver Reactor Recuperator; reverse-rotation recovery reactor) uses a thermochemical reaction. The reaction occurs twice hot and then in a cold chamber. In hot concentrated solar heat heats the iron-rich composite material to 1500 degrees, and it loses oxygen molecules. When material enters the cold chamber, it "takes" oxygen from the carbon dioxide gas supplied there. As a result, carbon monoxide, CO, remains from carbon dioxide.

The exact same process is used to produce hydrogen. The only difference is that instead of carbon dioxide, water is pumped into the “cold” chamber. As a result, mixing CO and hydrogen produces synthetic combustible gas that can replace the hydrocarbon fuel used today.
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Unfortunately, according to forecasts of scientists working called CR5, the project will be commercialized only after 15-20 years. So far, the main task is to increase efficiency (lower temperature, new composite materials, etc.).

via ecofriend , 3dnews