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Solar reduction of CO.sub.2

United States Patent

6,066,187
May 23, 2000
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
The red shift of the absorption spectrum of CO.sub.2 with increasing temperature permits the use of sunlight to photolyze CO.sub.2 to CO. The process of the present invention includes: preheating CO.sub.2 to near 1800 K; exposing the preheated CO.sub.2 to sunlight, whereby CO, O.sub.2 and O are produced; and cooling the hot product mix by rapid admixture with room temperature CO.sub.2. The excess thermal energy may be used to produce electricity and to heat additional CO.sub.2 for subsequent process steps. The product CO may be used to generate H.sub.2 by the shift reaction or to synthesize methanol.
Jensen; Reed J. (Los Alamos, NM), Lyman; John L. (Los Alamos, NM), King; Joe D. (Los Alamos, NM), Guettler; Robert D. (Los Alamos, NM)
Jensen; Reed J. (Los Alamos, NM)
09/ 034,873
March 4, 1998
This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy to The Regents of the University of California. The government has certain rights in the invention.