Kinetics of rapeseed oil oxidation by pressure differential scanning calorimetry measurements

✍ Scribed by Boleslaw Kowalski; Eliza Gruczynska; Katarzyna Maciaszek

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 85 KB
• Volume: 102
• Category: Article
• ISSN: 1438-7697
• DOI: 10.1002/(sici)1438-9312(200005)102:5<337::aid-ejlt337>3.0.co;2-3

✦ Synopsis

Kinetics of rapeseed oil oxidation by pressure differential scanning calorimetry measurements

Samples of rapeseed oils were oxidized at isothermal conditions in the cell of a pressure differential scanning calorimeter (PDSC). The experiments were carried out under 1400 kPa oxygen pressure at a temperature in the range of 113-144 °C. From resulting PDSC exotherms the times to reach the peak maximum (τ max ) were determined and used for the assessment of the oxidative stabilities of the samples. As PDSC exotherms were obtained at different temperatures, equations for extrapolation of the τ max values were proposed and activation energies as well as specific rate constants for oxidation were calculated.