| The oxidation induction periods of Jatropha biodiesel, rapeseed oil biodiesel, sunflower seed oil biodiesel, soybean oil biodiesel, corn oil biodiesel, peanut oil biodiesel, oil-tea camellia seed oil biodiesel and mustard oil biodiesel at different temperatures were determined. Through the relationship between oxidation induction period and temperature, a prediction model of oxidation induction period of biodiesel was established to predict the oxidation stability of biodiesel at room temperature. The oxidation stability of biodiesel at room temperature was optimized by adding antioxidants TBHQ, PG, BHA and BHT. The results showed that the oxidation stabilities of eight kinds of biodiesels were poor at 110℃, and none of the oxidation induction periods could reach 6 h. The oxidation induction periods of Jatropha biodiesel, rapeseed oil biodiesel, sunflower seed oil biodiesel, soybean oil biodiesel, corn oil biodiesel, peanut oil biodiesel, oil-tea camellia seed oil biodiesel and mustard oil biodiesel at room temperature were 635, 2 598, 730, 2 151, 2 425, 5 192, 2 330, 470 h respectively. Adding antioxidants could improve the oxidation stability of biodiesel. |
