Determination and Estimation Prediction of Some Properties of Biodiesel and Biodiesel Diesel Butanol Blends

Abstract

The demand for energy is increasing very rapidly and this has led to the depletion newlineof fossil fuels. Biodiesel (a mixture of fatty acid alkyl esters or FAAEs) can be considered newlineas a promising alternative to petroleum diesel. Critical properties and phase equilibrium newlineproperties are required for design and simulation of processes involving biodiesel. newlineDensity, viscosity and heat of vaporization of biodiesel are required for the modeling of newlinecombustion and fuel injection. Pour point and flash point are important for storage, newlinehandling and transport of fuel. Experimental determination of some properties like critical newlinetemperature, critical pressure, vapor pressure, cetane number and heat of vaporization is newlinetime-consuming and cumbersome. Methods for accurate estimation or prediction of newlineabove-mentioned properties are required. The objective of the present study was to newlinepropose most suitable model for a given property. newlineFor the study purpose, three biodiesels, jatropha, karanja, and palm which are of newlinerelevance to the Indian region were selected. Two types of blends, biodiesel-diesel and newlinebiodiesel-diesel-butanol were used. Study of butanol blends of these biodiesels is reported newlinefor the first time in this work. Density, viscosity, pour point and flash point of biodiesel, newlinebiodiesel-diesel and biodiesel-diesel-butanol blends were experimentally determined. newlineTotal of 112 experimental data points for density, 651 data points for viscosity, 48 data newlinepoints each for pour point and flash point were used to correlate these properties with newlinevolume fraction of biodiesel and temperature of blends. Pour point and flash point could newlineonly be related to volume fraction of the biodiesel. % OARD for biodiesel-diesel blends newlinewas 0.673 for density, 5.23 for viscosity, 12.10 for pour point and 2.78 for flash point. newline% OARD for biodiesel-diesel-butanol blends was 0.249 for density, 4.42 for viscosity, newline11.46 for pour point and 4.96 for flash point. newlineFor critical temperature method of Joback, for critical pressure method of Marrero and newlinePardillo