Kinetic studies on thermal degradation of automotive lubricant oils and estimation soot content by TGA

Abstract

Thermal degradation of fresh automotive lubricant characterized using TGA technique under Helium atmosphere at different heating rate 5, 10,20,30,40 Co /min based on mass loss as a function of temperature. To obtain the kinetic parameters and to describe the thermal decomposition of lubricant, TGA curves and their derivatives were analyses using Coast-Redfern methods. Kinetic parameters were determined was satisfactory presenting good correlation with linear correlation coefficient close to unit using SPSS package and was in a good agreement with publishes data. Also the present study describes soot content determination for different used lubricant. This wok aims to characterize the thermal decomposition process in relation to its kinetic, thermodynamic property and measure amount of soot.