CO₂ 분해용 스피넬상 LiMn₂O₄ 에 대한 Fe₃O₄ 첨가효과

Effects of Fe₃O₄ Addition on Spinel Phase LiMn₂O₄ for CO₂ Decomposition

The spinel LiMn₂O₄ powders were synthesized at 480℃ for 12 h in air by a sol-gel method using managanese acetate and lithium hydroxide as starting material and the Fe₃O₄ powders were synthesized by the precipitation method using 0.2M-FeSO₄·H₂O and 0.5M-NaOH. The synthesized Fe₃O₄ powders were mixed at portion of 5, 10, 15 and 20 wt% about LiMn₂O₄ powders through ball-milling followed by drying at room temperature for 48 h in air. The mixed catalysts were reduced at 350℃ for 3 h by hydrogen and the decomposition rate of carbon dioxide was measured at 350℃ using the reduced catalysts. As the results of CO₂ decomposition experiments, the decomposition rates of carbon dioxide were 85% in all catalysts but the initial decomposition rates of CO₂ were slightly high in the case of the 5%-Fe₃O₄ added catalyst.