CR5

aka Counter Rotating Ring Receiver Reactor Recuperator : Using concentrated Solar Power to reverse combustion, a research team from Sandia National Laboratories is building a prototype device intended to chemically “reenergize” carbon dioxide into carbon monoxide using concentrated solar power. The carbon monoxide could then be used to make hydrogen or serve as a building block to synthesize a liquid combustible fuel, such as methanol or even gasoline, diesel and jet fuel. https://share.sandia.gov/news/resources/releases/2007/sunshine.html

referenced in Daemon

Packed Particle Bed Reactor: The reactor concept is a promising step toward the practical and economical production of hydrogen fuel using only water and sunlight.

Sunshine to Petrol https://energy.sandia.gov/energy/renewable-energy/solar-energy/sunshine-to-petrol/

“In the short term we see this as an alternative to carbon sequestration,” says James Miller, a chemical engineer with Sandia’s advanced materials laboratory. Instead of just pumping CO2 underground for permanent storage, Miller says, the sun’s abundant energy can be used to achieve “reverse combustion” that essentially turns carbon dioxide back into a fuel. “It’s a productive utilization of CO2 that you might capture from a coal plant, a brewery, and similar concentrated sources.”