title: Low-melting-point biodiesel derived from corn oil via urea complexation.
abstract: The objective of this research was to improve the cold-flow property of biodiesel (fatty acid methyl ester, FAME) made from corn oil by urea complexation. Effects of processing conditions on the yield of low-melting-point biodiesel and its fatty acid composition were investigated. The optimal conditions were as follows: 50 degrees C stirring temperature, 40 min stirring time, 1:1 (w/w) ratio of urea to FAME, 5:1 (v/w) ratio of methanol to FAME, 20 degrees C crystallization temperature, and 2 h crystallization time. Under these conditions, the maximum yield of non-urea complexes with a melting temperature range from -52 to -45 degrees C was 53%, and the fatty acid profiles of non-urea complexes were 0.3% palmitic acid, 23.7% oleic acid, 75.1% linoleic acid, and 0.9% linolenic acid. Results also showed that oxystearin was helpful in further improving the cold-flow property of low-melting-point biodiesel.
authors.affiliation: Lipid Technology and Engineering, School of Food Science and Engineering, Henan University of Technology, Zhengzhou 450052, PR China.
authors.forename: Yanlan
authors.initials: Y
authors.lastname: Bi
authors.forename: Dongyou
authors.initials: D
authors.lastname: Ding
authors.forename: Donghai
authors.initials: D
authors.lastname: Wang
mesh_terms: D056804:Biofuels / Q000032:analysis*; D002152:Calorimetry, Differential Scanning; D003314:Corn Oil / Q000737:chemistry*; D003460:Crystallization; D004952:Esters / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D006358:Hot Temperature; D000432:Methanol / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D013997:Time Factors; D044366:Transition Temperature; D014508:Urea / Q000737:chemistry*
chemical_list: D056804:Biofuels; D004952:Esters; D005227:Fatty Acids; D003314:Corn Oil; D014508:Urea; D000432:Methanol