Response Surface Methodology For Waste Cooking Oil Triboproperties In Engine Oil

The purpose of this study is to determine the optimal design parameters and to indicate which of the design parameters that are statistically significant for obtaining a low coefficient of friction (COF) and low wear rate with waste palm oil blended with SAE 40. The tribology performance evaluated using piston ring-liner contact tester. Design of experiment (DOE) constructed using Response Surface Methodology (RSM) to minimize the number of experimental conditions and develop mathematical model between the key process parameters such as rotational speeds (200 RPM to 300 RPM), volume concentration (0% to 10% waste oil) and applied loads (2 kg to 9kg). Analysis of variance (ANOVA) test also carried out to check the adequacy of the developed empirical models. Scanning electron microscopy (SEM) was used to examine damage features at the worn surface under lubricant contact conditions.

Index Terms— Biolubricant; Wear; Friction; Waste Cooking Oil; Response Surface Methodology (key words)

M.M.Noor