Thesis (M.Sc.)--Chulalongkorn University, 2008

The objectives of this study, is to study biodiesel production from by production from a by-products of chicken essences soup manufacturing via alkaline-catalyzed transesterification using sodium hydroxide, potassium hydroxide and potassium carbonate as catalyst. To optimize the reaction condition amount of catalyst, molar ratio of methanol to chicken oil, reaction temperature and reaction time were investigated. The chemical and physical properties of biodiesel produced from the transesterification, such as density, flash point, could point, pour point, kinematic viscosity, cetane number, cetane index, %sulphur, ester content, and mono-, di-, triglyceride content were measured. The results showed that KOH and NaOH are sustable catalyst for biodiesel production and the biodiesel with best product yield and quality was produced at a 10:1 molar ratio of methanol to chicken oil, 1.0% of potassium hydroxide catalyst; reaction temperature 65C and reaction time 50 minutes. The product yield of the biodiesel produced under optimal condition was 99.02% with 98.27% of fatty acid methyl ester (FAME).