Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Comparative Crude Oil Productions on Liquefaction of Crop Residues

액화기술 적용 식물체 잔사별 원유 생산량 비교

  • Shin, JongDo (Department of Agricultural Ecology, National Institute of Agricultural Science and Technology) ;
  • Yoon, SunCheol (Department of Agricultural Ecology, National Institute of Agricultural Science and Technology) ;
  • Paek, Yee (Protected Horticulture Experiment Station, National Horticulture Research Institute) ;
  • Park, SangWon (Department of Agricultural Ecology, National Institute of Agricultural Science and Technology) ;
  • Choi, HongLim (Department of agricultural Biotechnology, Seoul National University)
  • 신중두 (농촌진흥청 국립농업과학원) ;
  • 윤순철 (농촌진흥청 국립농업과학원) ;
  • 백이 (시설원예시험장) ;
  • 박상원 (농촌진흥청 국립농업과학원) ;
  • 최홍림 (서울대학교 동물자원학과)
  • Received : 2008.11.07
  • Accepted : 2008.12.22
  • Published : 2008.12.31
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Abstract

Aqueous thermal liquefaction of rice, barley, wheat, and rapeseed straws was investigated to compare the amount of heavy oil with catalysts such as $K_2CO_3$, NaOH and KOH in the reaction temperature at $320^{\circ}C$ for 10 minutes. The reaction was carried out in a 5,000ml liquefaction system with dispenser and external electrical furnace. Raw materials (160g), 2,000ml of distilled water and 10% (wt/wt) of catalyst to plant residue were fed into the reactor. It was observed that the maximum heavy oil yield was about 29% from the feeding stock, barley straw, with addition of KOH. The caloric values of crude oil from different crop residues were ranged from 55% to 66% relative to the raw materials depend on crop residue. It was appeared that its maximum calorific value from wheat straw was approximately 6190 kcal/kg.

본 연구는 볏짚, 보리짚, 밀짚 및 유채대를 이용한 액화공정을 적용하여 중유를 생산할 때 그 생산량을 비교하였다. 촉매제로 $K_2CO_3$, NaOH 및 KOH와 같은 촉매제를 사용하여 반응온도 $320^{\circ}C$에서 10분간 반응시켰다. 액화공정 시스템은 외부전기화로, 교반기 및 5,000ml 반응기로 구성되어 있다, 반응기에 식물체 잔사 160g, 증류수 2,000ml 및 촉매제를 혼합하였으며, 촉매제량은 식물체 잔사량의 10%(wt/wt)를 투입하였다. KOH 촉매제를 사용하며, 보릿짚을 이용할 경우 바이오매스 투입량과 비교하여 최고 중유 생산량은 29%였다. 바이오매스 발열량과 비교하여 식물체 잔사로부터 전환된 중유의 발열량은 55~66% 범위이었다. 밀짚으로부터 전환된 중유의 발열량은 약 6190 kcal/kg으로 가장 높게 관측되었다.

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