Effect of metal contents on oxidation stability of biodiesel/diesel blends

Present paper deals with the evaluation of oxidation stability of metal contaminated biodiesel/diesel blend. Effectiveness of different antioxidants with respect to different biodiesel/diesel blends has also been checked. It is found that pyrogallol (PY) is the most effective antioxidant. As the % of diesel is increased in the blend, the oxidation stability of biodiesel/ diesel blend also increased. From the experiments it is found that B100 required large amount of antioxidant for maintaining the specification followed by B30, B20, B10 and B7 samples with metal contents. Therefore it is possible to attain requisite oxidation stability of metal contaminated biodiesel by blending 70% petro-diesel in Jatropha curcas biodiesel (JCB). This optimum combination is expected to reduce the cost of biodiesel substantially and require lower quantity of antioxidant.