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Winterized Methyl Esters from Soybean Oil:An Alternative Diesel Fuel With Improved Low-Temperature Flow Properties
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Methyl esters from vegetable oils (biodiesel) are very attractive as alternative fuels for combustion in direct injection compression-ignition (diesel) engines. Biodiesel fuels have low-temperature flow properties that limit utilization during cooler weather in moderate temperature climates. Although winterization reduces the cloud point (CP) of methyl soyate from 0 to -2O°C, liquid product yields were relatively low (0.30-0.33 g/g). Winterization of methyl soyate-cold flow improver mixtures decreased CP by -11°C and increased yields to 0.80-0.87 g/g. Winterization of methyl soyate from hexane and isopropanol solvents gave similar results. Differential scanning calorimetry (DSC) analyses showed that nucleation mechanisms of methyl esters were significantly affected by winterization.
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Dunn, R., Shockley, M., and Bagby, M., "Winterized Methyl Esters from Soybean Oil:An Alternative Diesel Fuel With Improved Low-Temperature Flow Properties," SAE Technical Paper 971682, 1997, https://doi.org/10.4271/971682.Also In
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