<div>Fossil fuel usage causes environmental pollution, and fuel depletion, further
affecting a country’s economy. Biofuels and diesel-blended fuels are practical
alternatives to sustain fossil fuels. This experimental study analyses
lemongrass oil’s performance, emissions, and combustion characteristics after
blending with diesel. Lemongrass oil is mixed with diesel at 10 (B10), 15 (B15),
and 25% (B25) and evaluated using a 5.20 kW direct injection diesel engine. B10
brake thermal efficiency is 36.47%, which is higher than other blends. The B10
displays an 8.73% decrease in brake-specific fuel consumption compared to
diesel. An increase in exhaust gas temperature for B10 than diesel is 4.5%. It
indicates that higher lemongrass oil blends decrease exhaust gas temperature.
The decrease in average carbon monoxide emissions in B10 to diesel is 22.19%.
The decrease in hydrocarbon emissions for B10 to diesel is 7.14%. Biodiesel with
lemongrass oil increases nitrogen oxide (NOx) because of increased temperature
and poor combustion. Apart from NOx emissions, all other parameters of
lemongrass oil blends are suitable for practical diesel applications. The
significant findings benefit the biodiesel community toward the efficient
combustion of biodiesel blends.</div>