title: Transesterification of triglycerides in high and low quality oil feeds over an HT2 hydrotalcite catalyst.
abstract: The use of a heterogeneous catalyst, in the transesterification reaction of refined and acidic cottonseed oil for the production of methyl-esters (biodiesel) has been studied. The basic Mg-Al-CO3 hydrotalcite catalyst used showed a high activity for methanolysis and esterification reactions in a refined and an acidic cottonseed oil as well as in a representative high water content animal fat feed. The experiments were performed in a temperature range between 180 and 210 degrees C, in a batch reactor. The methanol to vegetable oil molar ratio was 6 to 1, while the catalyst concentration was fixed at 1 wt.% of the oil mass. Non-calcined and calcined forms of the catalyst were tested. The activity of the calcined catalyst was lower than the initial activity of the non-calcined catalytic system but it appeared the same with the reused non-calcined system.
authors.affiliation: National Technical University of Athens, School of Chemical Engineering, Heroon Polytechniou 9, 157 73 Zografos, Greece.
authors.forename: N
authors.initials: N
authors.lastname: Barakos
authors.forename: S
authors.initials: S
authors.lastname: Pasias
authors.forename: N
authors.initials: N
authors.lastname: Papayannakos
mesh_terms: D000536:Aluminum Hydroxide / Q000378:metabolism*; D002384:Catalysis; D004951:Esterification; D005227:Fatty Acids / Q000378:metabolism; D005990:Glycerol / Q000378:metabolism; D008276:Magnesium Hydroxide / Q000378:metabolism*; D010938:Plant Oils / Q000737:chemistry / Q000378:metabolism*; D014280:Triglycerides / Q000378:metabolism*; D014867:Water
chemical_list: D005227:Fatty Acids; D010938:Plant Oils; D014280:Triglycerides; D014867:Water; C010467:hydrotalcite; D000536:Aluminum Hydroxide; D008276:Magnesium Hydroxide; D005990:Glycerol