M. Habibullah
University of Malaya, Malaysia
Title: Study the tribological characteristics of combined blend of Palm-Coconut biodiesel in four ball tribometer
Biography
Biography: M. Habibullah
Abstract
Due to increasing environmental pollution concerns and diminishing petroleum reserves, the use of biodiesel alternative to petroleum diesel is increasing. Therefore, this is creating the tribology of biodiesel related new issues. The purpose of this research is to investigate the tribological characteristics of combined blend of palm-coconut biodiesel by using four ball tribometer. The biodiesel was produced using transesterification process and measured their major physical-chemical properties. Experiment was conducted during 300s with constant temperature at 27° C and constant sliding speed of 1200 rpm at different load of 40 kg, 50 kg, 63 kg and 80 kg for all tested fuels. The elemental analysis for tested fuel was done using multi element oil analyzer (MOA) and worn surfaces of the ball were examined by SEM/EDX analysis. Result reveals that diesel fuel shows the higher unsteady state friction coefficient with longer time duration along with higher wear scar diameter (WSD) and decreases with increasing biodiesel percentage. From the elemental analysis, it is found that more metal element is added for Palm Biodiesel (PB) and highest amount of metal elements were decreased for diesel fuel. The formation of oxide and addition of metal elements are extremely low for Coconut Biodiesel (CB). Surface morphology showed that CB20 shows the smaller worn surfaces compared to other diesel-biodiesel blend except CB100. A further increase in the concentration of biodiesel (PB30, PB50), the extrusion of metal is quite higher than PB20 and thus PB20 showed auspicious lubricating performance and highest possibility to form lubricating film without breaking down.