Production and Property Improvement of Biodiesel from Waste Oils

J.-Y. Park, D.-K. Kim, S.-C. Park & J.-S. Lee
In Korea, most resources for biodiesel production were imported from abroad. To find out domestic resources, the feasibility of biodiesel production from acid oil as a by­product of the refining of vegetable oils and from waste lard as a by­product of the leather making process with high content of free fatty acids (FFAs) was investigated. A process consisting of the esterification of FFAs by an acid catalyst followed by the transesterification of triglycerides by an...