The Mixing Effect of Methanol and Ethanol in Lard and Soybean Oil Based Biodiesel Production

돈지와 대두유를 이용한 바이오디젤 제조에서 메탄올과 에탄올의 혼합효과

  • Lee, Seung Bum (Department of Health & Environment, Kimpo College) ;
  • Kim, Hyungjin (Department of Chemical Engineering, Dankook University)
  • 이승범 (김포대학교 보건환경과) ;
  • 김형진 (단국대학교 화학공학과)
  • Received : 2014.07.16
  • Accepted : 2014.08.12
  • Published : 2014.10.10


The fuel properties of biodiesel produced by changing the mixing ratio of methanol and ethanol in trans-esterification of soybean oil and lard were evaluated in this paper. The solubility of oil and fat in ethanol was higher than that in methanol. Also the more homogeneous biodiesel was produced as increasing the mole ratio of ethanol. The conversion characteristics of lard was the best at the mixing mole ratio of methanol and ethanol was 6 : 6 at the reaction temperature of $60^{\circ}C$. On the other hands, the best biodiesel conversion characteristics for soybean oil was obtained at the mixing mole ratio of 3 : 3. The kinematic viscosities of soybean oil and lard based biodiesel were 4.17~4.35 cSt and 4.69~4.93 cSt, respectively. The oxidation stability and higher heating value increased with increasing the mole ratio of ethanol. The oxidation stability satisfied the criteria of biodiesel quality of 6 hours. And finally, the higher heating value was approximately 40 MJ/kg.


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