DYNA JOURNAL ENGINEERING

Key words:

biodiesel, estabilidad a la oxidación, OOT, diseño de experimentos, PDSC, biodiesel, oxidative stability, OOT, experimental design, PDSC.

Article type:

ARTICULO DE INVESTIGACION / RESEARCH ARTICLE

Section:

VARIOUS

ABSTRACT
In this study the effect of the level of oxygen pressure, the concentration of antioxidant and the type of biodiesel on the oxidative stability of the material have been measured. An experimental design was performed considering two types of biodiesel, various pressures of oxygen and additions of a commercial antioxidant. As a response variable was chosen Oxidation Onset Temperature (OOT), measured by Pressure Differential Scanning Calorimetry (PDSC). It has been found that the design that best fits the data is the replicated main effects model with three treatment factors. The sequence of factors, sorted in descending order according to their influence in the OOT resulted to be: Pressure > Type of biodiesel > Antioxidant. It has been also observed an interaction by mixing 50% by weight of the two types of biodiesel, which produces some deviation from the expected linear behaviour.
KEY WORDS: biodiesel, oxidative stability, OOT, experimental design, PDSC.