| Using Jatropha biodiesel as raw material, the compound effects of six kinds of antioxidants and six kinds of pour point depressants in market on the induction period, freezing point, kinematic viscosity and calorific value of biodiesel were studied. The results showed that different types of pour point depressants had great effects on the antioxidant effect of antioxidant, but the influence law was not related to the type of antioxidants and the influence range was within 5%. The compound effects of pour point depressants and antioxidants on the freezing point and kinematic viscosity of biodiesel were great. The main influencing factor was antioxidants oil solubility and antioxidants with good oil solubility could decrease the freezing point of biodiesel, but correspondingly increase the kinematic viscosity. Pour point depressants and antioxidants had little effect on calorific value of biodiesel, and the main influencing factor was the calorific value of the chemical components of the additive itself. Adding pour point depressants could increase the calorific value of biodiesel. |
