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Study on CO2-Coal Gasification Reaction Using Natural Mineral Catalysts

천연 광물질을 이용한 CO2 석탄 촉매 가스화 반응 특성 연구

  • Lee, Roosse (Department of Mineral Resources & Energy Engineering, Chonbuk National University) ;
  • Sohn, Jung Min (Department of Mineral Resources & Energy Engineering, Chonbuk National University)
  • 이루세 (전북대학교 자원.에너지공학과) ;
  • 손정민 (전북대학교 자원.에너지공학과)
  • Received : 2015.11.14
  • Accepted : 2015.12.22
  • Published : 2016.02.10

Abstract

In this study, the effect of natural minerals on the reaction kinetics for lignite-$CO_2$ gasification was investigated. After physical mixing of lignite from Meng Tai area with 5 wt% of each natural mineral catalysts among Dolomite, Silica sand, Olivine and Kaolin, $CO_2$ gasification was performed using TGA at each 800, $850^{\circ}C$ and $900^{\circ}C$. The experimental data was analyzed with volumetric reaction model (VRM), shrinking core model (SCM) and modified volumetric reaction model (MVRM). MVRM was the most suitable among three models. As increasing the reaction temperature, the reaction rate constant became higher. With natural mineral catalysts, the reaction rate constant was higher and activation energy was lower than that of without catalysts. The lowest activation energy, 114.90 kJ/mol was obtained with silica sand. The highest reaction rate constant at $850^{\circ}C$ and $900^{\circ}C$ and lower reaction rate constant at $800^{\circ}C$ were obtained with Kaolin. Conclusively, the better catalytic performance could be observed with Kaolin than that of using other catalysts when the reaction temperature increased.

Acknowledgement

Supported by : 산업통상자원부

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