Abstract: The bio-diesel oil from Pistacia chinensis Bunge(PCB) has fuel properties within the limits prescribed by American (ASTM PS121-1999) standards, which is an attractive alternative fuel. PCB bio-diesel oil is susceptible to be oxidized due to great amont of methyl esters of unsaturated fatty acids, which induce the deterioration of bio-diesel quality. The antioxidative stability of PCB was studied by adding four different antioxidants respectively under accelerated condition. These produced drastic effects when PCB was blended with two kinds of grape seeds extracts, respectively. Compared to Vc, a natural antioxidant, and commercial synthetic antioxidant TP 26,the effectiveness of both grape seeds extracts at low dosage (0.02%) is equivalent to that of the other two additives at high dosage (0.1%). Results indicated that grape seeds extracts have the potential as a high efficiency antioxidant of bio-diesel oil.

Key words: bio-diesel oil, grape seeds extracts, antioxidative stability, Pistacia chinensis Bunge