TY - JOUR AB - A valuable alternative for making the biodiesel price more competitive than petroleum-derived fuel is the use of raw materials of low cost. However, these feedstocks contain a high amount of free fatty acids (FFAs). Currently, the biodiesel production from this kind of resource is comprised in a two-step process, where an initial acid-catalyzed esterification of the FFA followed by a base-catalyzed transesterification of the triglycerides occurs. Commonly, the sulfuric acid is the catalyst on the acid step. However, some serious drawbacks, such as substantial reactor corrosion and the great generation of wastes, even of the salts formed by mineral acid neutralization, are negative aspects of these processes. In this work, the SnCl(2)-catalyzed esterification of saturated and unsaturated FFA was evaluated. High yields and selectivities were achieved on the ethanolysis of FFA, under mild conditions of reaction. The SnCl(2) catalyst has shown to be as active as the mineral acid H(2)SO(4). Their use has relevant advantages in comparison to mineral acid catalysts, such as lower corrosiveness and as well as the unnecessary neutralization after the reaction finishes. Herein, the effects of the principal parameters of the reaction have been investigated. Kinetic investigations revealed a first-order dependence upon both the oleic acid and the catalyst concentration. The energy of activation achieved for this process was approximately similar to those reported for H(2)SO(4)-catalyzed FFA esterification. AD - Univ Fed Vicosa, Dept Chem, BR-36570000 Vicosa, MG, Brazil AN - WOS:000265439000074 AU - Cardoso, A. L. AU - Neves, S. C. G. AU - da Silva, M. J. DA - Mar-Apr DO - 10.1021/ef800639h J2 - Energ Fuel KW - rice bran oil LA - English N1 - 436tm PY - 2009 SN - 0887-0624 SP - 1718-1722 ST - Kinetic Study of Alcoholysis of the Fatty Acids Catalyzed by Tin Chloride(II): An Alternative Catalyst for Biodiesel Production T2 - Energy & Fuels TI - Kinetic Study of Alcoholysis of the Fatty Acids Catalyzed by Tin Chloride(II): An Alternative Catalyst for Biodiesel Production UR - ://WOS:000265439000074 VL - 23 ID - 4617 ER -