1Department of Mechanical Engineering, Pondicherry Engineering College, Pillaichavady, Pondicherry, India
2Department of Mechanical Engineering, National Institute of Technology, Karaikal, Pondicherry, India
*Corresponding Author E-mail id: jpvpandian@yahoo.in
Online published on 30 September, 2015.
Biodiesel is well recognised as a potential substitute for diesel fuel due to its several benefits such as reliability, renewability, biodegradability, lubricity and lower pollutant emissions. Waste frying oil (WFO) is one of the low cost feedstock for biodiesel production. Several correlations are formulated to predict the heating value of vegetable oils/fats and their biodiesel. However, these correlations do not provide specific results for WFOs due to the fact that the cooking oils undergo several chemical reactions during the frying process and their physical-chemical properties and fatty acid composition are altered. These changes may affect the heating value. In this study, an empirical equation is developed to predict the heating value of WFO in terms of density, kinematic viscosity, iodine value, flash point, saponification value and acid value. At maximum deviation of 5% is observed between measured and correlated heating values. The heating value of WFO can be predicted precisely by using the correlation.
Waste frying oil, Biodiesel, Physicochemical properties, Higher heating value, Vegetable oil
