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Title: Solar reduction of CO.sub.2

Patent ·
OSTI ID:873006
 [1];  [2];  [2];  [2]
  1. 121 La Vista Dr., Los Alamos, NM 87544
  2. Los Alamos, NM
+ Show Author Affiliations

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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
DOE Contract Number:
W-7405-ENG-36
Assignee:
Jensen, Reed J. (Los Alamos, NM)
Patent Number(s):
US 6066187
OSTI ID:
873006
Country of Publication:
United States
Language:
English

References (8)

CO 2 Extinction Coefficient 1700–3000 Å journal February 1972
Absorption cross section measurements of carbon dioxide in the wavelength region 118.7–175.5 nm and the temperature dependence journal January 1996
Temperature dependence of the carbon dioxide photoabsorption cross section between 1200 and 1970 Å journal October 1983
The carbon monoxide flame bands journal October 1963
Electronic spectoscopy of isoelectronic molecules. II. Linear triatomic groupings containing sixteen valence electrons journal February 1971
Terrestrial Radiation: Methods of Measurement book January 1975
Photodissociation of O2 and CO2 from vibrationally excited states at high temperatures journal February 1991
High resolution absorption spectrum of CO 2 between 1750 and 2000 Å: 1. Rotational analysis of nine perpendicular-type bands assigned to a new bent-linear electronic transition journal March 1992

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Related Subjects

solar
reduction
shift
absorption
spectrum
increasing
temperature
permits
sunlight
photolyze
process
preheating
near
1800
exposing
preheated
whereby
produced
cooling
hot
product
mix
rapid
admixture
excess
thermal
energy
produce
electricity
heat
additional
subsequent
steps
generate
reaction
synthesize
methanol
hot product
thermal energy
absorption spectrum
shift reaction
process step
subsequent process
increasing temperature
product mix
process steps
/48/422/