Combustion and Emission Performance Characteristics of Diesel Engine using Ethanol/water Mix Blended Diesel fuel

  • Mohammed Salih Mahjoub
  • Uzaldin Sadick Abdul Hussain


Improvements in fuel properties are essential for the suppression of diesel pollutant emission and better engine performance. Ethanol is an attractive alternative fuel because it is renewable, bio-based resource and is oxygenated thereby providing the potential for the reduction of particulate emission in compression ignition engines. The aim of the present work is to investigate the effect of direct injection (DI) of ethanol/water mix on emissions and engine performance using single cylinder naturally aspirated, four strokes, direct injection, and water cooled diesel engine. In the present study, a new technology controlled Ethanol/Water mix injection method is applied to a direct injection (DI) diesel engine to show effect on engine performance and emissions under steady operation. Ethanol/water mix is injected into the inlet manifold during inlet period. The experimental test matrix included six different fuels, namely Neat Diesel fuel and five secondary Ethanol/Water mix fuel with diesel fuel. The mixed fuels contain 0.55 by volume fraction of diesel fuel, corresponding to 0%, 25%, 50%, 75% and 100% by volume of ethanol in the mixes. Tests were performed in a single-cylinder naturally aspirated, four stroke, water cooled, and direct-injection diesel engine at engine speed (1000 rpm) on full engine load condition by using six-test fuels. It has been found that the application of Ethanol/Water mix leads to a significant reduction in the more environment concerning emissions of oxides of nitrogen (NOx) except increase at case pure ethanol, carbon dioxide (CO2), and hydrocarbon (UBHC) at case (EW50, EW75, Ethanol). However, increase in hydrocarbon (UBHC) at case (Water, EW25) and oxygen (O2) emission have been found after use of Ethanol/Water. The results revealed that the brake specific fuel composition (BSFC) of both Ethanol/Water and diesel fuels reduces with increasing blend ratio, with a brake thermal efficiency (BTE) increase for both fuels, and a brake power (BP) increase. This can be attributed to the oxygen content of ethanol when compared with Neat Diesel.text

How to Cite
MAHJOUB, Mohammed Salih; ABDUL HUSSAIN, Uzaldin Sadick. Combustion and Emission Performance Characteristics of Diesel Engine using Ethanol/water Mix Blended Diesel fuel. ICTEA: International Conference on Thermal Engineering, [S.l.], v. 2017, mar. 2017. Available at: <>. Date accessed: 20 feb. 2018.