The invention relates to a method for producing CO with an
inert oxide carrier (SiO2, Al2O3, ZrO2, TiO2, YSZ and the like) supported
spinel compound A<1-gamma>B<2-
delta>O<4> (0<=gamma<1, 0<=
delta<=1) as an active material and through two steps of thermochemical cyclic
decomposition of CO2. The method comprises the following main steps: (1) firstly, the active material releases
oxygen at a high temperature so as to generate
oxygen vacancies; and (2) the active material containing a large number of
oxygen vacancies is subjected to a reaction with CO2 at a lower temperature, and CO is released.
Spinel is used as the active material for undergoing the
decomposition reaction of CO2 for the first time; and compared with other active materials, the
spinel active material has large oxygen releasing quantity (with the quantity of 7.4-30.6 ml / g at the temperature of 1400 DEG C), and can generate considerable quantity of CO (with the quantity of 10.8-58.6 ml / g). The active material can utilize
solar energy focus generated high-temperature heat as an
energy source, CO2 is taken as the reaction
raw material, and CO is produced; and the method is clean and
pollution-free, and is expected to become an effective technology for preparing chemical fuel through reduction of CO2 by
solar energy.