Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on the Synthesis of $Mn_3O_4$ and the Decomposition and Adsorption of $CO_2$

$Mn_3O_4$의 합성과 $CO_2$ 분해 및 흡착에 관한 연구

  • Kim Seung-Ho (Dept. of Environmental Engineering, Samchok National University) ;
  • Park Young-Goo (Dept. of Environmental Engineering, Samchok National University) ;
  • Ko Jae-Churl (Department of Chemical Engineering, Samchok National University)
  • 김승호 (삼척대학교 환경공학과) ;
  • 박영구 (삼척대학교 환경공학과) ;
  • 고재철 (삼척대학교 화학공학과)
  • Published : 2000.06.01
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Abstract

In this study, $Mn_3O_4$ was synthesized by the different equivalent ratios using solution of $MnCL_2 {\cdot} 4H_2O$ and NaOH. We have investigated the crystal structure and surface area by XRD, BET Method, studied on the decompositon and adsorption of carbon dioxide with synthesized $Mn_3O_4$. As the results, we surveyed that main peak was $Mn_3O_4$, some Peaks were $MnO_2$ and $Mn_5O_8$ The specific surface area was ranged from $13.92m^2/g$ to $32.33m^2/g$. The decomposition of $CO_2$ was observed by the differential equivalent ratios at $450^{\circ}C$. $CO_2$ was well decomposed at equivalent ratio of 0.75. The amount of chemisorption of $CO_2$ was ranged from 2.885 to 19.628cc/g. Optimal equivalent ratio was 1.00 for the chemisorption of $CO_2$.

본 연구는 염화망간과 수산화나트륨을 이용하여 당량비에 따라 산화망간을 합성하였다. 합성된 산화망간의 결정구조와 비표면적을 측정하였으며, 이산화탄소의 분해 및 흡착에 대하여 연구하였다. 합성된 시료의 결정구조 분석결과 $Mn_3O_4$의 주피크가 나타났으며, 약간의 $MnO_2$와 $Mn_5O_8$도 관찰되었다. 또한 비표면적은 $13.92m^2/g{\~}32.33m^2/g$으로 측정되었다. 산화망간을 이용하여 $450^{\circ}C$에서 이산화탄소의 분해를 실시하였으며, 당량비 0.75에서 가장 잘 분해되었다. 이산화탄소의 화학흡착량을 측정한 결과 2.885cc/g${\~}$19.628cc/g으로 관찰되었으며, 이산화탄소의 흡착을 위한 최적당량비는 1.00이었다.

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