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Received February 16, 2009
Accepted March 24, 2009
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아임계 및 초임계수를 이용한 Athabasca 오일샌드의 추출
Extraction of Athabasca Oil Sand with Sub- and Supercritical Water
한국에너지기술연구원 온실가스연구단, 305-343 대전 유성구 장동 71-2
Green House Gas Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea
pjhoon@kier.re.kr
Korean Chemical Engineering Research, June 2009, 47(3), 281-286(6), NONE Epub 29 June 2009
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Abstract
아임계 및 초임계 조건의 물을 이용하여 캐나다산 Athabasca 오일샌드로부터 역청 추출 및 황 제거 실험을 수행하였다. 0~120 min의 반응시간, 360, 380 oC의 온도, 15~30 MPa의 압력 및 0.074~0.61 g/cm3의 물 밀도를 변화시키면서 micro reactor에서 역청 수율을 조사하였다. 역청 수율은 온도에 상관없이 압력이 증가할수록 증가하였으며, 특히 초임계 영역에서 수증기 개질반응에 의해 생성된 수소에 의해 역청의 수율이 급격히 증가하였다. 전체 기상 생성량은 압력 증가에 따라 감소하였으나 380 ℃에서 황과 수소의 생성분율은 25 및 30 MPa로 압력 증가에 따라 소량 증가하였다. 이상의 결과는 초임계 조건이 수소의 생성과 황의 제거에 유리하다는 것을 보여준다. 초임계 조건(380 ℃, 25와 30 MPa)에서 역청 수율은 최대 약 22%였으며, 오일샌드에 함유된 황 제거율도 최대값 40%에 도달하였다.
Bitumen extraction and sulfur removal from Athabasca oil sand were conducted using water in sub- and supercritical condition. Bitumen yield in micro reactor was investigated in the pressure range of 15~30 MPa, the temperature of 360 and 380 ℃ and water density 0.074~0.61 g/cm3 for 0~120 min. Bitumen yield increased with reaction pressure irrespective of temperature and dramatically increased in especially supercritical region due to hydrogen formed from water gas shift reaction. Total amount of gas product decreased with reaction pressure but the portion of_x000D_
sulfur and hydrogen increased a little with increasing pressure to 25 and 30 MPa. It is seen that supercritical condition was favourable to the hydrogen formation and sulfur removal. Bitumen yield and sulfur removal from original oil sand reached a maximum 22% and 40% respectively in supercritical condition(the reaction time of 60 min at 380 ℃ and 25 or 30 MPa).
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