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Investigation on Stability Analysis of Polanga oil Methyl Ester

Gyana Ranjan Behera, B. Prasanth, Biswajeet Nayak, Swarup Kumar Nayak, Purna Chandra Mishra


Biodiesel is a renewable alternative fuel and consists of mono-alkyl esters of the fatty acids. One of the major technical problems associated with the biodiesel is its storage stability and susceptibility to oxidation because of its chemical nature. This nature of the biodiesel is due to unsaturated fatty acid chains in its molecular structure. Also, the presence of the double bond in the molecule of the biodiesel produces a high level of reactivity with the oxygen. The products of the oxidation cause the biodiesel to become acidic and to form insoluble gums and sediments that can plug fuel filters. Hence, the storage of biodiesel over extended periods may lead to degradation of fuel properties that may affect the fuel quality. In this work, biodiesel was derived from Polanga oil and the biodiesel samples were stored at room temperature and conducted the oxidation stability test utilizing various antioxidants like (BHT, TBP and OBPA) using Biodiesel Ranchimat instrument and storage stability study over a period of 6 weeks. At regular intervals, biodiesel samples were analyzed to measure the acid value, viscosity, calorific value, density, flash point and fire point. From the results, it is found that BHT was the most effective antioxidant used among all others on PoME (Polanga oil methyl ester). With respect to storage stability, there is a slight difference in the properties of the polanga biodiesel, but within the limits of the biodiesel specifications upto the storage period of 5 weeks.

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