CR5-processen blev oprindelig opfundet af [[Rich Diver]] til at splitte [[vand]] til [[hydrogen]] og [[oxygen]].
<ref>[http://www.fuelcellsworks.com/Supppage4553.html 14-February-2006, Fuelcellworks: Sandia Labs Researcher Rich Diver Invents New Way to Make Hydrogen for Fuel] {{Webarchive|url=https://web.archive.org/web/20071213173740/http://www.fuelcellsworks.com/Supppage4553.html |date=13. december 2007 }} Citat: "...His invention, the Counter Rotating Ring Receiver Reactor Recuperator (CR5, for short), splits water into hydrogen and oxygen, using a simple, two-step thermochemical process...the theme of his PhD dissertation at the University of Minnesota — and of concentrated solar gained from his 15 years working with [[Stirlingmotor|Stirling engine]] [[termisk-solfanger|solar collector]] systems at Sandia..."</ref>
Senere fandt Rich Diver på ideen med at splitte [[carbondioxid]] (i stedet for [[vand]]) til oxygen og [[carbonmonoxid]] med den samme proces. Carbonmonoxid kan anvendes til at syntetisere [[metanol]], [[ætanol]], [[butanol]] og mange andre energirige flydende [[Syntetisk brændstof|syntetiske brændstoffer]].
<ref>[[:en:Synthetic fuel]]</ref>
<ref>[http://www.sandia.gov/news/resources/releases/2007/sunshine.html December 5, 2007, Sandia National Laboratories – Sandia’s Sunshine to Petrol project seeks fuel from thin air] {{Webarchive|url=https://web.archive.org/web/20100301055759/http://www.sandia.gov/news/resources/releases/2007/sunshine.html |date= 1. marts 2010 }} Citat: "...CR5 inventor Rich Diver says the original idea for the device was to break down water into hydrogen and oxygen...Over the past year they have shown proof of concept and are completing a prototype device that will use concentrated solar energy to reenergize carbon dioxide or water, the products of combustion. This will form carbon monoxide, hydrogen, and oxygen, which ultimately could be used to synthesize liquid fuels in an integrated S2P system..."</ref>
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