REGAINING OF TRIBOLOGICAL BEHAVIOR OF USED LUBRICANT

Abstract

This research Project deals with the experimental analysis of regaining of tribological behavior of used Lubricant, for proper use of lubricants is very important. It has impact to the lifetime of machineries & friction of moving parts. And also improve of machine performance and increase smooth rotation of moving parts. In Bangladesh up to now there has not been proper management of used lubricating oil. Refining used lubricating oil would reduce the dependency on lubricating oil import as well as safeguards the environment. The aim of this project was to study the possibility of refining used lubricating oil generated in Bangladesh. The used lubricating oil Samples that have collected to find out data collection and its analysis. In our Study, we collected used lubricants from Fuchs Bangladesh Limited, Chattogram and BNO, Chattogram and a renowned workshop, Chattogram and also testing from a Standard Laboratory, Chattogram which provide available data for various Lubricants. This research effort focuses on comparative study experimentally of refined engine oils SAE 40, refined hydraulic oil ISO VG 46 & also refined gear oil ISO VG 150 by extraction of composite solvent, single solvent, and distillation methods. Composite solvent was made up of Methyl Ethyl Ketone (MEK) which is soluble in water and also commonly used as an industrial solvent. Different properties of refined oil and waste oil were analyzed, such as appearance, color, pour point, flash point, density, Kinematic viscosity, viscosity index, etc. Results found that the above properties were improved at different degrees. From analysis, viscosity was found nearly same at difference temperature for three Samples of Refined & Fresh engine oil, hydraulic oil and gear oil. Also further analysis the others properties such as Appearance, Color, Density, Kinematic viscosity, Viscosity index, Flash point & Pour point are near about same as fresh oil. The financial analysis of the selected process was done using different techniques. From the calculation we get payback period = 5.448 year, discounted payback period = 6.56 year, Net present worth = NBDT 3425.05 lakh, IRR = 26%. From the above values it was clear that the project is financially feasible.