Improvement of oxidation stability and cold flow properties of biodiesel using mixed oil strategy

Abstract Biodiesel's major limitations are its low-temperature performance and oxidation stability. This study analyses how different oil mixes affect biodiesel oxidation stability and cold flow. For this investigation, Jatropha, Karanja, and Palm oils were selected based on their chemical composition and availability, and their mixtures were formed. A simplex lattice mixture design model for biodiesel properties was designed, and optimisation was carried out to achieve a set of objectives. The optimal mixed-oil ratio for Jatropha, Karanja, and Palm oil was found 8:57:35(% v/v), with the desirability of 0.32, and the response values were observed to be compatible with biodiesel standards. Optimal oils mix biodiesel oxidation stability was 8.5 h, better than Jatropha (5.2 h) and Karanja (7.5 h). Similarly, blended oil's biodiesel cloud point improves by 57% compared to Palm biodiesel. oil-mixing technique balances saturated and unsaturated fatty acids and improves the oxidation stability and cold flow properties without chemical treatment.