International Scientific Journal

Thermal Science - Online First

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Performance test and emission characteristics of diesel fuel blended with n-Hexanol

The interest of using alternative fuels in diesel engines has been accelerated exponentially due to a foreseen scarcity in world petroleum reserves, increase in the prices of the conventional fossil fuels and restrictions on exhaust emissions such as greenhouse gases from internal combustion (IC) engines initiated by environmental concerns. Alcohol which is bio based renewable and oxygenated fuel provides a suitable alternate fuel for internal combustion engines. In this regard exhaustive research has been carried on alcoholic fuels like methanol and ethanol but little work has been done on exploring the potential of higher alcohols for automotive application Long chain alcohols such as pentanol, hexanol despite their analogous properties have rarely been inspected. n-Hexanol, the longer chain alcohol is used to be fueled with diesel. The usage of oxygenated fuel will reduce emission level. Adding alcohols to petroleum products allows the fuel to combust properly due to the presence of oxygen, which increases the combustion efficiency and reduces air pollution. In the present investigation, two blends of hexanol and diesel were prepared B10, B20 ie., 10 % hexanol and 90 % diesel, 20% hexanol and 80% diesel. All the blends were found to be homogenous and stable. The brake thermal efficiency for all the blends was observed to be slightly higher in comparison to neat diesel. The maximum brake thermal efficiency was obtained with B20 blend. Similarly minimum total fuel consumption was obtained for B20 blend while rest of the blend showed a reduction in total fuel consumption. CO emissions were found to get reduced with increase in hexanol percentage in the blends. HC emissions were observed to increase as the percentage of hexanol increases on the blend. The NOx emissions increased with increase in engine load for all test fuels. Finally, concluded that a blend of B20% hexanol in diesel will result in better engine performance and emissions of CO2, CO and NOx.
PAPER REVISED: 2019-05-11
PAPER ACCEPTED: 2019-06-01
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