Effect of reformulated fuel strategy on compression ignition engine compatibility using antioxidant additive and clean Karanja methyl ester

Clean Technologies and Environmental Policy - The present work aims at investigating the compatibility of antioxidant with biodiesel through the tribological assessment of a compression ignition...     

Investigations on compression ignition engine durability through long-term endurance study using low viscous biofuel blends

These days, biomass-based low viscous renewable biofuel is very much popular for internal combustion engine applications due to its unique features compared to other form of biofuels. In this present work, a comparative analysis has been carried out to investigate the suitability of waste biomass-based low viscous biofuel through long-term durability study. A 256 h of long-term endurance test as per Indian Standard: 10,000, Part IX-1980 standard has been conducted using 10% and 20% by volume of waste biomass-based biofuel in two different phases, and the tested results are compared with the results of conventional diesel fuel. During this long-term endurance study, the variations in performance, emissions and behaviours are observed before and after the 256 h of operation in both the phases. The long-term endurance test has degraded the engine components which has reflected in engine performance. The carbon deposit would play a vital role in lowering the engine performance. It has been evident that lubricant oil degradation is deteriorates the engine performance. Furthermore, the durability study has also reflected that the diesel engine emissions are extremely higher after the endurance test when compared to fresh engine. On the other hand, the carbon monoxide and unburned hydrocarbon emissions are lower in waste biomass-based biofuel operation except oxides of nitrogen emissions. This is due to the clean burning ability of biofuel which has shown remarkable combustion behaviour compared to diesel fuel. The long-term tribological test has shown that the kinematic viscosity and flash point of lubricating oil are reduced during endurance study and this has reflected more severe for diesel fuel when compared to waste biomass-based biofuel. The ash content for 20% of lemon peel oil is 19% higher than diesel fuel and 10% of lemon peel oil blend. Higher rate of oxidation has resulted in significant reduction in total base number of lubricating oil which reveals that the low viscous biofuel has higher lube oil degradation. It is also evident that wear of engine components is deteriorated the life of the engine along with lubricant oil degradation. Piston rings wear is more in the lubricant collected from 20% of lemon peel oil blend as compared other fuels. Finally, it has been concluded that the low viscous biofuel has poor resistance on diesel engine wear and this could be rectified before its application.

Graphic abstract