TY - JOUR AB - Waste frying oil as valueless material which is disposed to environment can be used as a promising feedstock to produce biodiesel. In this study, constructional lime was used as alkaline heterogeneous catalyst for biodiesel production from virgin and waste frying oil. After determining the best activation temperature for the catalyst (600 A degrees C), transesterification reactions were carried out at 65 A degrees C, MeOH to oil molar ratio of 12:1, and 1 wt% of activated constructional lime under vigorous mixing for 5 h. Yield of reactions for virgin and waste frying oil (2.17 % free fatty acid) and pretreated waste frying oil (0.918 % free fatty acid) were 87, 93.9, and 94 %, respectively. Transesterification of virgin frying oil and pretreated waste frying oil were done at 65 A degrees C, MeOH to oil molar ratio of 6:1, and 1 wt% of KOH as catalyst under vigorous mixing for 2 h, for comparison. Yield of the reaction was 98.6 and 95.1 %, respectively. Therefore, when constructional lime is used as catalyst pretreatment of waste oil is not necessary. AD - Islamic Azad Univ, Dept Chem Engn, Sci & Res Branch, Tehran, Iran AN - WOS:000319437200022 AU - Ghanei, R. AU - Moradi, G. AU - Heydarinasab, A. AU - Seifkordi, A. A. AU - Ardjmand, M. DA - Jul DO - 10.1007/s13762-012-0137-4 IS - 4 J2 - Int J Environ Sci Te KW - fatty acid methyl ester LA - English N1 - 151cc PY - 2013 SN - 1735-1472 SP - 847-854 ST - Utilization of constructional lime as heterogeneous catalyst in biodiesel production from waste frying oil T2 - International Journal of Environmental Science and Technology TI - Utilization of constructional lime as heterogeneous catalyst in biodiesel production from waste frying oil UR - ://WOS:000319437200022 VL - 10 ID - 8711 ER -