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Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.35, No.5, 799-804, 1997
Drop Tube Reactor에서 석탄슬러리 가스화 특성
Gasification Characteristics of Coal-Slurry in a Drop Tube Reactor
김용전, 이종민, 이재구, 김재호, 김정래, 김상돈
Drop tube reactor(0.05m-I.D*1m-high)에서 석탄슬러리 가스화반응특성을 파악하고자 반응온도(1,200-1,500℃), 산소/석탄비(0.3-1.5), 슬러리 농도(50, 55, 58wt.%), 탄종에 따른 영향을 실험하였다. 반응온도가 증가함에 따라, H2와 CO의 조성은 증가하나 CO2는 감소하였다. 산소/석탄비가 증가함에 따라 탄소전환율, 황전환율, 생성가스 수율, CO2의 농도는 증가하고 CO와 H2의 수율은 산소/석탄비가 0.6일 때 최대값을 보였다. 슬러리 농도의 증가는 탄소전환율, 황전환율, 생성가스 수율을 증가시키나 H2/CO의 비는 감소시켰다. 고등급탄의 경우, 동일한 석탄가스화 전환율을 얻기 위해서는 더 긴 체류시간이 필요하였다.
The effects of reaction temperature(1,200-1,500℃), oxygen/coal ratio(0.3-1.5), slurry concentration(50, 55, 58wt%), and coal type on gasification characteristics of coal-slurry in a drop tube reactor(0.05m-I.D.×1m-high) have been determined. The contents of H2 and CO increase whereas, CO2 decrease with increasing reaction temperature. Carbon conversion, sulfur conversion, product gas yield and concentrations of CO2 increase with increasing O2/coal ratio whereas, the product gas yield of H2 and CO exhibit the maximum values at O2/coal=0.6. With increasing slurry concentration, carbon conversion, sulfur conversion, total product gas yield increase, but the molar ratio of H2/CO decrease. The longer residence time is required to gasify the higher rank coals.
Keywords: Coal-slurry; Gasification; Drop Tube Reactor
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