Extracted jatropha oil preheating using exhaust heat recovery

Abstract

The purpose of this research is to study the influence of extraction methods (solvent, soxhlet, screw and hydraulic) on the properties of jatropha oil. This study was established to use the exhaust heat recovery to preheat the extracted oil. The free fatty acid, and the properties of jatropha oils extracted using various methods were determined. The oil yields are 19, 11, 25 and 20% for screw, hydraulic, Soxhlet and solvent extraction processes, respectively. Free fatty acids were 2.7, 5, 17.6 and 21.1% for the oils extracted using the screw press, hydraulic, solvent and soxhlet methods, respectively. Linoleic, oleic, palmitic, and stearic fatty are the major fatty acids in the extracted oils. Measured calorific values of jatropha oil extracted following soxhlet, solvent, screw and hydraulic processes methods were 39135, 38808, 39128, 39201 and 38789 kJ/kg, respectively. For jatropha oil extracted by soxhlet, solvent, screw, hydraulic, and biodiesel methods, the evaluated cetane numbers were 37.53, 37.62, 37.83, 39.12, and 42.62, respectively. Effect of oil preheating on density and viscosity was investigated. As the temperature of the oil increased, the density and viscosity of the oil decrease.