Optimization of Biodiesel Synthesis Process Using Spent Coffee Grounds

커피가루를 이용한 바이오디젤의 제조공정 최적화

  • La, Joo-Hee (Division of Energy & Biological Engineering, Kyungwon University) ;
  • Lee, Seung-Bum (Division of Energy & Biological Engineering, Kyungwon University) ;
  • Lee, Jae-Dong (Division of Energy & Biological Engineering, Kyungwon University)
  • 라주희 (경원대학교 환경에너지공학전공) ;
  • 이승범 (경원대학교 환경에너지공학전공) ;
  • 이재동 (경원대학교 환경에너지공학전공)
  • Received : 2010.10.03
  • Accepted : 2010.11.01
  • Published : 2011.02.10


In this study, we investigated the characteristics of biodiesel using the waste coffee oil which was extracted by waste coffee grounds. We tried to deduce the optimum conditions by defining the operating variables, such as mole ratio between methanol and coffee oil (6~18) and the reaction temperature ($45{\sim}60^{\circ}C$) in the biodiesel production processes. The performance was evaluated in terms of yields, contents of fatty acid methyl ester (FAME), viscosities, and heating values. The optimum reaction temperature was $55^{\circ}C$. Also, the best biodiesel was produced at the mole ratio between methanol and coffee oil of 12. The highest heating value of the produced biodiesel made from coffee oil was 39.0~39.4 MJ/kg, which satisfies the general standard for the biodiesel energy density, 39.3~39.8 MJ/kg.


Supported by : 경원대학교


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