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In this study, a group contribution method based on the Riedel equation was developed to predict the vapor pressures of fatty acid methyl, ethyl, propyl, and butyl esters. A CH 2 (ester) group was introduced to distinguish the fatty acid methyl, ethyl, propyl, and butyl esters. The group parameters were regressed based on a total of 4687 vapor pressure data. The results show that, the proposed...
Viscosity is an important fluid property because of its direct relation with the fuel injection process for engines. The kinematic viscosity of biodiesel at 313K should satisfy the range specified by the international biodiesel standards. In this study, an artificial neural network (ANN) method was developed to predict the biodiesel kinematic viscosity at 313K with the experimental data of 105 biodiesel...
Density is an important parameter for liquid fuel to correlate the cetane number, heating value and viscosity, and directly influences the fuel injection process. Densities of biodiesel over a wide temperature range up to high temperatures are required for accurate spray and combustion modeling. In this study, densities were predicted for three methyl ester biodiesels from room temperature to 523K...
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