title: Catalytic synthesis of biodiesel from high free fatty acid-containing feedstocks.
abstract: Recyclable and reusable heterogeneous diarylammonium catalysts are highly effective in catalyzing the esterification of the free fatty acid (FFA) present in greases to methyl esters to reduce the FFA content from 12-40 wt% to 0.5-1 wt%; the resulting ester-glyceride mixture (pretreated grease) could then be readily converted to methyl esters by base-catalyzed transesterification.
authors.affiliation: Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, NC 27599, USA.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Zafiropoulos
authors.forename: Helen L
authors.initials: HL
authors.lastname: Ngo
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Foglia
authors.forename: Edward T
authors.initials: ET
authors.lastname: Samulski
authors.forename: Wenbin
authors.initials: W
authors.lastname: Lin
mesh_terms: D002384:Catalysis; D004951:Esterification; D005223:Fats / Q000737:chemistry*; D005227:Fatty Acids / Q000032:analysis*; D005742:Gasoline / Q000032:analysis*; D008745:Methylation; D015394:Molecular Structure
chemical_list: D005223:Fats; D005227:Fatty Acids; D005742:Gasoline