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Received September 21, 2016
Accepted October 7, 2016
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고정층 반응기에서의 저등급 석탄 혼합촉매가스화 반응특성
Low-rank Coal Char Gasification Research with Mixed Catalysts at Fixed Reactor
충남대학교 에너지과학기술대학원, 34134 대전광역시 유성구 대학로 99 1한국에너지기술연구원, 34129 대전광역시 유성구 가정로 152
Graduate School of Energy Science and Technology, Chungnam National University, 99, Daehak-ro, Yusung-gu, Daejeon, 34134, Korea 1Korea Institute of Energy Research, 152, Gajeong-ro, Yuseong-gu, Daejeon, 34129, Korea
Korean Chemical Engineering Research, February 2017, 55(1), 99-106(8), 10.9713/kcer.2017.55.1.99 Epub 2 February 2017
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Abstract
본 연구에서는 인도네시아 저등급 석탄인 Kideco탄을 이용하여 질소 분위기 하에 등온상태에서 촤(char)를 생성한 후 반응가스(스팀,이산화탄소)를 주입하여 합성가스를 생성하는 가스화를 진행하였다. 온도가 반응속도에 미치는 영향을 알아보기 위해 850 oC 이하의 운전온도(700, 750, 800, 850 °C)에서 반응을 진행하였다. 촉매가 미치는 영향을 알아보기 위해 알카리계 촉매인 탄산칼륨과 금속촉매인 니켈을 이용하였으며 두가지 촉매의 혼합비율(1:9, 3:7, 5:5, 7:3, 9:1)을 다르게 하여 연구를 수행하였다. 탄산칼륨은 물리적 혼합을 통해 니켈은 이온교환법을 통해 준비하였다. 기-고체 반응특성을 알아보기 위해 열중량분석기와 가스크로마토그래피를 통해 얻은 실험결과를 shrinking core model (SCM), volumetric reaction model (VRM), random pore model (RPM) and modified volumetric reaction model (MVRM)에 적용하여 비교하였다.
In this study, mixed catalytic char gasification of Indonesia low-rank coal Kideco was investigated under nitrogen atmosphere and isothermal conditions at a fixed reactor. The effects of the temperature were investigated at various temperature (700, 750, 800, 850 °C). The effects of blend ratio of catalysts (K2CO3, Ni) were investigated with different blend ratios (1:9, 3:7, 5:5, 7:3 and 9:1). The sample was prepared by mixing with K2CO3 physically and by ionexchange method with Ni. The data from thermogravimetric analyzer and gas chromatography were applied to four gassolid reaction kinetic models including shrinking core model, volumetric reaction model, random pore model and modified volumetric reaction model.
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