화학공학소재연구정보센터
Chemical Engineering Communications, Vol.205, No.9, 1157-1166, 2018
Production of mixed methyl/ethyl esters from waste fish oil through transesterification with mixed methanol/ethanol system
Biodiesel (mixed fatty acid methyl/ethyl esters) was prepared from waste fish oil through base-catalyzed transesterification with mixed methanol/ethanol system. Effect of methanol/ethanol (% v/v), type and concentration of the catalyst, mixed alcohols to oil molar ratio, the reaction temperature, and the reaction time on the biodiesel yield was optimized. Maximum biodiesel yield (97.30wt%) was produced by implementing 1:1 methanol/ethanol (v/v), 1.0wt% KOH, 6:1 mixed alcohols to oil molar ratio, 40 degrees C reaction temperature, and 30min of reaction time. Conversion of the waste fish oil to mixed methyl/ethyl esters was confirmed by H-1 NMR spectroscopy. Fuel properties of the resulting biodiesel in addition to its blends with petrodiesel were in good agreement with specifications of ASTM D6751 and ASTM D7467, respectively. Therefore, it was concluded that using mixed alcohol system for biodiesel production could reduce the production cost through reducing conditions required for maximum conversion.