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Production of fullerenes using concentrated solar flux

United States Patent

6,077,401
June 20, 2000
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A method of producing soot containing high amounts of fullerenes comprising: providing a primary concentrator capable of impingement of a concentrated beam of sunlight onto a carbon source to cause vaporization of carbon and subsequent formation of fullerenes, or providing a solar furnace having a primary concentrator with a focal point that concentrates a solar beam of sunlight; providing a reflective secondary concentrator having an entrance aperture and an exit aperture at the focal point of the solar furnace; providing a carbon source at the exit aperture of the secondary concentrator; supplying an inert gas over the carbon source to keep the secondary concentrator free from vaporized carbon; and impinging a concentrated beam of sunlight from the secondary concentrator on the carbon source to vaporize the carbon source into a soot containing high amounts of fullerenes.
Fields; Clark L. (Greeley, CO), Pitts; John Roland (Lakewood, CO), King; David E. (Lakewood, CO), Hale; Mary Jane (Golden, CO), Bingham; Carl E. (Denver, CO), Lewandowski; Allan A. (Evergreen, CO)
Midwest Research Institute (Kansas City, MO)
08/ 290,538
August 15, 1994
The United States Government has rights in this invention under Contract No. DE-ACO2-83CH10093 between the United States Department of Energy and the National Renewable Energy Laboratory, a Division of the Midwest Research Institute.