Evaluation of the biodiesel fuel properties of fatty acid methyl esters from Carica papaya L.
2010
Charvet, C.J.S.P. | Duya, M.R.J.V. | Miller, A.V.G. | Razon, L.F., De La Salle Univ., 2401 Taft Ave., Manila (Philippines). Dept. of Chemical Engineering
Fatty acid methy esters(FAME) from Carica papaya L.(papaya) oil were investigated as a potential biodiesel fuel. Oil was extracted from papaya seeds by mechanical pressing, solvent extraction with hexane and solvent extraction with steam. The papaya seed oil contained 10.3% free fatty acid. Thus, a two-step conversion process of acid esterification followed by a conventional alkali-catalyzed transesterification was conducted. Upon testing, papaya FAME was found to have a density of 885 kg/cu m at around 15 deg C, Kinematic viscosity f 4.7 sq mm/s, an acid value of 0.26 mg KOH/g, a cloud point of 20 deg C, a flash point of 170degC, a sulfur content of 0.029%, a sulfated ash content of 0.01%, a free glycerol content of 0.00%, a total glycerol content of 0.16% and a predicted iodine value of 76.0 g I2/(100g). The FAME complied with three Key biodiesel standards (Philippine National Standard (PNS 2020:2003), American Society for Testing and Materials (ASTM D6751-08) and European Standards (EN 14214), except for the Kinematic viscosity, which exceeded the limit provided by PNS
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