Study on Thermophysical Properties of Methyl Palmitate and Ethyl Palmitate at High Temperature
DOI:10.13949/j.cnki.nrjgc.2019.05.010
Key Words:surface tension  viscosity  density  refractive index  methyl palmitate  ethyl palmitate
Author NameAffiliation
YUAN Zemin,ZHAO Guanjia,YIN Jianguo,MA Suxia 1.College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
 2.Shanxi Key Laboratory of Clean and Efficient Combustion and Utilization in the Circulating Fluidized Bed, Taiyuan 030024, China 
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Abstract:To provide theoretical basis and test data support for methyl palmitate and ethyl palmitate, which are two fatty acid esters, to be used as fuels or fuel additives in diesel engine, their thermophysical properties including surface tension, viscosity, density and refractive index were investigated in a wide temperature range by the surface light scattering, vibration tube and total reflection. The test data of the density and refractive index of both palmitates were correlated respectively as polynomial and linear functions of temperature. The average absolute deviations of density values calculated with the polynomial functions from the test data were 0.033% and 0.013% respectively, and both the average absolute deviations of refractive index values calculated with the liner function from the test data were 0.004%. The test data of the viscosities of both palmitates were correlated as polynomial functions of the reciprocal of temperature, and the average absolute deviations of these values calculated with the polynomial functions from the test data were 1.76% and 2.30% respectively. The test data of the surface tension of both palmitates were correlated as the van der Waals type functions, and the average absolute deviations of these values calculated with the van der Waals type functions from the test data were 0.86% and 1.70% respectively.
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