Cylindrical in shape, the device has both a hot and cold chamber with 14 Frisbee-like rings in the middle. The rings’ outer edges–made of iron oxide–are solar heated to 2,700 degrees which forces the composite to lose oxygen atoms.
As the rings rotate (one revolution a minute), they move in towards the cool chamber. There, carbon dioxide is added and the iron oxide composite takes back its missing oxygen atoms. The resulting carbon monoxide would be used in creating a synthesized liquid combustible fuel.
Invented by Rich Diver, we first discussed the device in January of last year. Until recently, it had only been tested in a laboratory. But a fully hand-built, and much larger, version was just successfully tested. “This is a first-of-its-kind prototype we’re evaluating,” Diver explains.
The device is called the Counter-Rotating-Ring Receiver Reactor Recuperator or the CR5 for short. I think we’ll stick to that shorter title for now. This method of forced-photosynthesis was initially designed for creating cheap abundant hydrogen fuel.
“In the short term we see this as an alternative to sequestration,” SNL Advanced Materials Laboratory chemical engineer James Miller, who has also been part of the research, adds.
This type of CO2 recycling could take trapped carbon waste from power plants and then returned for production, instead of releasing it to the air. Though, the resulting syngas does just burn right back into CO2–not exactly ideal.
Regardless, we’re looking at 15-20 years before the tech is market ready. Researcher’s hope to achieve an efficiency of a few percent which is about double that of real-world photosynthesis. …
Too bad it is 15 to 20 years away.