TY - JOUR AB - As a kind of waste collected from restaurants, trap grease is a chemically challenging feedstock for biodiesel production for its high free fatty acid (FFA) content. A central composite design was used to evaluate the effect of methanol quantity, acid concentration and reaction time on the synthesis of biodiesel from the trap grease with 50% free fatty acid, while the reaction temperature was selected at 95 degrees C. Using response surface methodology, a quadratic polynomial equation was obtained for ester content by multiple regression analysis. Verification experiments confirmed the validity of the predicted model. To achieve the highest ester content of crude biodiesel (89.67%), the critical values of the three variables were 35.00 (methanol-to-oil molar ratio), 11.27 wt% (catalyst concentration based on trap grease) and 4.59 h (reaction time). The crude biodiesel could be purified by a second distillation to meet the requirement of biodiesel specification of Korea. AD - Korea Inst Energy Res, Taejon 305343, South Korea AN - WOS:000258549600008 AU - Wang, Z. M. AU - Lee, J. S. AU - Park, J. Y. AU - Wu, C. Z. AU - Yuan, Z. H. DA - Jul DO - DOI 10.1007/s11814-008-0110-6 IS - 4 J2 - Korean J Chem Eng KW - biodiesel LA - English N1 - 339ad PY - 2008 SN - 0256-1115 SP - 670-674 ST - Optimization of biodiesel production from trap grease via acid catalysis T2 - Korean Journal of Chemical Engineering TI - Optimization of biodiesel production from trap grease via acid catalysis UR - ://WOS:000258549600008 VL - 25 ID - 4478 ER -