J. Korean Ceram. Soc. > Volume 38(10); 2001 > Article
 Journal of the Korean Ceramic Society 2001;38(10): 894.
 스피넬상 $Li{Mn_2}{O_4}$를 이용한 $CO_2$ 분해의 최적조건 이동석, 임병오, 양천회1, 이풍헌2 홍익대학교 공과대학 화학공학과1한밭대학교 화학공학과2홍익대학교 과학기술대학 세라믹공학과 The Optimum of $CO_2$ Decomposition using Spinel Phase $Li{Mn_2}{O_4}$ Dong-Suek Lee, Byung-O Rim, Chun-Hoe Yang1, Poong-Hun Lee2 Department of Chemical Engineering, Hong-Ik University1Department of Chemical Engineering, Hanbat National University2Department of Ceramic Engineering, Hong-Ik University ABSTRACT The spinel $Li{Mn_2}{O_4}$ catalysts for $CO_2$ decomposition were synthesized by a sol-gel method using manganese acetate and lithium hydroxide as starting materials through drying at $150^{circ}C$ for 12 hrs under oxygen atmosphere followed by heat treatment at $480^{circ}C$ for 12 hrs. The synthesized $Li{Mn_2}{O_4}$ were reduced by hydrogen for 3 hrs at various temperatures and the decomposition rate of carbon dioxide was investigated at 300, 325, 350, 375 and $400^{circ}C$ using the $Li{Mn_2}{O_4}$ reduced by hydrogen gases. As a result of experiment, the optimum temperature of hydrogen reduction and $CO_2$ decomposition was shown $350^{circ}C$. The physicochemical properties of the spinel $Li{Mn_2}{O_4}$ the reduced $Li{Mn_2}{O_4}$ and the $Li{Mn_2}{O_4}$ after $CO_2$ decomposition were examined with XRD, SEM and TGA. Key words: $Li{Mn_2}{O_4}$ Sol-gel method, Hydrogen reduction, $CO_2$ decomposition
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