Abstract
The study investigated the effect of degumming on physicochemical properties of FAEE produced from Acacia nilotica seed oil using AOCS and ASTM standard methods. The results revealed that the values for specific gravity (0.88), iodine value (65.03 g I2/100 g) and refractive index (1.31) of A. nilotica seed oil were lower than the AOCS standard. The acid degumming showed higher removal efficiency (89%) than water degumming (77%) and was chosen for FAEE production. FAEE yield of 88.97% was obtained from acid degummed oil. The values obtained for cloud point (17.33 °C), pour point (4.67 °C), iodine value (33.35 g I2/100 g), saponification value (166.67 mg KOH/g) and acid value (1.97 mg KOH/g) of the degummed FAEE were significantly (p < 0.05) lower than the values of undegummed FAEE, whereas significant (p < 0.05) increase was observed in the values for flash point (132.00 °C), cetane number (65.50) and calorific value (60.13 MJ/kg). The study concluded that degummed A. nilotica seed oil could be used as feedstock for FAEE/biodiesel production.
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