Abstract
Jatropha-curcas biodiesel has recently been considered as one of the potential renewable energy sources in Asia. This biodiesel is produced through the transesterification process of the non-edible oil obtained from Jatropha-curcas. The properties of this biodiesel are quite similar to those of diesel fuel. However, high viscosity of pure Jatropha-curcas biodiesel adversely affects engine performance. Hence, the percentage of Jatrophacurcas biodiesel that will not cause any adverse effect on the engine must be determined. In this context, this paper experimentally investigates the performance and exhaust emission characteristics of a direct injection compression ignition engine fuelled with 25%, 50% and 100% volume basis Jatropha-curcas biodiesel with diesel. Results showed that the Jatropha-curcas biodiesel and its blends demonstrated lower values for brake thermal efficiency and exhaust emission levels than diesel, but not for nitrogen oxide levels and brake specific fuel consumption. It was observed that the blend containing 25% Jatropha-curcas biodiesel (BD25) was the best alternative for diesel fuel based on engine emissions and overall performance. Therefore, BD25 could be considered a potential alternative fuel for compression ignition engines.
Highlights
Today the fossil fuel crisis, global warming, and the related environmental issues have raised significant interest in the scientific community that has triggered the need to search for environmentfriendly fuels, such as biofuel or vegetable oil, to sustain the high-quality fuel
The present work aimed at studying the effects of the Jatropha-curcas biodiesel blends on the performance and exhaust emissions characteristics of a CI engine
The maximum Brake Thermal Efficiency (BTE) was observed at full load conditions when using diesel
Summary
Today the fossil fuel crisis, global warming, and the related environmental issues have raised significant interest in the scientific community that has triggered the need to search for environmentfriendly fuels, such as biofuel or vegetable oil, to sustain the high-quality fuel. Biofuels could be indirectly or directly extracted from various biomass sources [1,2,3]. Biodiesel molecules or methyl-esters contain a reasonably high amount of oxygen approximately 10% to 11% (by weight)) that is involved in the combustion process. These oxygenated biodiesel fuels can effectively improve combustion and reduce emission in 4-stroke Compression Ignition (CI) engines. These oxygen-rich fuels improve combustion temperature, they lead to minor increase in Nitrogen Oxides (NOx) emission [4, 5]
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