Chee Liang Yung, Harrison Lik Nang Lau, Soh Kheang Loh
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引用次数: 0
Abstract
Oxidative stability is a crucial parameter that determines the stability of a fuel during transport and storage. It is a measurement of fuel resistance to deterioration upon exposure to air, moisture, heat, and microorganisms that are present in real life environment. Fuel with poor oxidative stability is prone to oxidation and degradation, leading to the formation of undesired free fatty acids and polymer deposits that may cause failure at fuel pump and clogging of fuel injectors. In this study, the suitability of the PetroOXY method as a rapid alternative to the conventional Rancimat test for oxidative stability assessment was evaluated. Palm biodiesel and commercial biodiesel blends (B7, B10, and B20) were analyzed using both methods. A strong linear correlation was established for biodiesel samples (R2 = 0.9569), indicating that PetroOXY is a reliable tool for rapid screening of biodiesel oxidative stability. In contrast, only a moderate correlation was observed for the commercial biodiesel blends, likely due to the compositional complexity of fossil diesel hydrocarbons and variations in additive formulations. Antioxidant butylated hydroxytoluene (BHT) was found to be effective in retarding the biodiesel autoxidation upon prolonged storage. Palm biodiesel treated with a low dosage of BHT, that is, 50 mg/kg, was able to maintain the Rancimat induction period above 15 h even after 18 months of storage in typical laboratory conditions.
期刊介绍：
The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate.
JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of yeartoyear, environmental, and/ or cultivar variations through use of appropriate statistical analyses.
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