스피넬상 Fe₃O₄를 이용한 CO₂ 분해에서 LiMn₂O₄ 첨가효과

Effects of LiMn₂O₄ Addition on CO₂ Decomposition Using Spinel Phase Fe₃O₄)

The spinel Fe₃O₄ powders were synthesized using 0.2 M-FeSO₄·7H₂O and 0.5 M-NaOH by oxidation in air and the spinel LiMn₂O₄ powders were synthesized at 480℃ for 12 h in air by a sol-gel method using manganese acetate and lithium hydroxide as starting materials. The synthesized LiMn₂O₄ powders were mixed at portion of 5, 10, 15 and 20 wt% of Fe₃O₄ powders using a ball-mill. The mixed catalysts were dried at room temperature for 24 hrs. The mixed catalysts were reduced by hydrogen gas at 350℃ for 2 h. The carbon dioxide decomposition rates of the mixed catalysts were 90% in all the mixed catalysts but the decomposition rate of carbon dioxide was increased with adding LiMn₂O₄ powders to Fe₃O₄ powders.