چكيده لاتين :
Trans esterification of three vegetable oils, sunflower oil, linseed oil and mixed oils as; sunflowersoyabean
and olein were carried out using methanol , and potasium hydroxide as catalyst. The methyl esters of the
corresponding oils were separated from the crude glycerol and characterized by physical-ehemical methods to evaluate
their thermal properties. This methods are determination of densities, cloud points, pour points, flash points, kinematic
viscosities, hydrogen/carbon ratios, sulfur contents, ash contents and triglycerides. The physico-ehemical characteristic
of biodiesel treated with ozone showed improvement of pour point and flash point indicating higher degree of safety
for fuel. Methyl esters mixed with their corresponding ozonated oil were subjected to comparison and evaluation for
their thermal properties by the thermo gravimetric analysis differential thermal analysis from which the calculated heat
of enthalpy and comparison with the heat of conventional diesel. The result s showed that the oxygen content of
biodiesel samples treated with ozone increased weight % and resulted in more extensive chemical reaction, promoted
combustion characteristics and less carbon residue was produced. Gas chromatography appeared more suitable to
addre ss the problem of determining/verifying biodie sel methyl ester and showed th at methyl ester content was
impurity free. Ultra violet-detection was used for rapid quantization of triglycerols. From the analyses performed
biodiesel treated with ozone modified the thermal and oxidative stability shown by the high combustion efficiency
indicated by the high heat of enthalpy and reducing the emission of particulate matter
