Absorption and Decomposition of CO2 by Active Ferrites Prepared by Atmospheric Plasma Spraying

Active ferrites, which play an important role in the catalytic decomposition of CO2, have been fabricated by atmospheric plasma spraying to incorporate FeO and anoxic iron oxide [Fe3O4−δ (0 < δ < 1)]. The complexity of phase composition, especially the presence of FeO, gives the resulting powder a greater ability to decompose CO2 when compared to hydrogen-reduced Fe3O4 or Fe2O3 particles. Spraying distance is found to play an important role in modulating the decomposition ability of the powders, while elevated temperatures can also enhance the catalytic decomposition of CO2.