title: Biodiesel production from crude Jatropha curcas L. seed oil with a high content of free fatty acids.
abstract: A technique to produce biodiesel from crude Jatropha curcas seed oil (CJCO) having high free fatty acids (15%FFA) has been developed. The high FFA level of JCJO was reduced to less than 1% by a two-step pretreatment process. The first step was carried out with 0.60 w/w methanol-to-oil ratio in the presence of 1% w/w H(2)SO(4) as an acid catalyst in 1-h reaction at 50 degrees C. After the reaction, the mixture was allowed to settle for 2h and the methanol-water mixture separated at the top layer was removed. The second step was transesterified using 0.24 w/w methanol to oil and 1.4% w/w NaOH to oil as alkaline catalyst to produce biodiesel at 65 degrees C. The final yield for methyl esters of fatty acids was achieved ca. 90% in 2 h.
authors.affiliation: Energy Technology Center, Agency for Assessment and Application of Technology, Kawasan Puspiptek, Serpong, Tangerang, Indonesia.
authors.forename: Hanny Johanes
authors.initials: HJ
authors.lastname: Berchmans
authors.forename: Shizuko
authors.initials: S
authors.lastname: Hirata
mesh_terms: D001709:Biotechnology / Q000379:methods*; D002384:Catalysis; D002849:Chromatography, Gas; D002853:Chromatography, Liquid; D004736:Energy-Generating Resources; D004951:Esterification; D004952:Esters; D005227:Fatty Acids / Q000737:chemistry; D005230:Fatty Acids, Nonesterified; D005742:Gasoline; D031286:Jatropha / Q000378:metabolism*; D000432:Methanol / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D013696:Temperature
chemical_list: D004952:Esters; D005227:Fatty Acids; D005230:Fatty Acids, Nonesterified; D005742:Gasoline; D010938:Plant Oils; D000432:Methanol