Physical-Chemical Properties of Water-in-Diesel Fuel Emulsions


  • Mohamed Y. E. Selim UAE University, P. O. Box 15551, Al-Ain, UAE
  • Mamdouh T. Ghannam UAE University, P. O. Box 15551, Al-Ain, UAE
  • Adel M. M. Hussein Helwan University, Helwan, Egypt



Water-in-diesel emulsion, viscosity, shear rate, shear stress


The addition of water dispersed phase into the diesel continuous phase will lead to the formation of water-in-diesel (W/D) emulsion, which significantly reduces the pollution level of NOx and particulate matters in the diesel engines. Small amount, 0.2% by volume, of surfactant material was necessary in the preparation of a stable W/D emulsion. The study of the physical and chemical properties of stable W/D emulsions is important to understand the flow behavior characteristics of these emulsions. Pure diesel fuel and three samples of W/D emulsions (10%, 20% and 30% by volume water) were examined in this study. The following properties are measured according to the corresponding ASTM standards for the pure diesel and its emulsions with 10%, 20% and 30% water: heating value, pour point, flash point, distillation data, density, viscosity, calculated cetane index, total acid number, and sulfur content. The addition of water in the emulsion caused a drop in the calorific value, final boiling point, cetane index, total acid number, and sulfur content. Increasing the water also increased the pour point, flash point, and density.

Author Biographies

Mohamed Y. E. Selim, UAE University, P. O. Box 15551, Al-Ain, UAE

Department of Mechanical Engineering, College of Engineering

Mamdouh T. Ghannam, UAE University, P. O. Box 15551, Al-Ain, UAE

Department of Chemical and Petroleum Engineering, College of Engineering

Adel M. M. Hussein, Helwan University, Helwan, Egypt

Mech Power Eng Department, Faculty of Eng At Mattaria


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How to Cite

Mohamed Y. E. Selim, Mamdouh T. Ghannam, Adel M. M. Hussein. Physical-Chemical Properties of Water-in-Diesel Fuel Emulsions. Int. J. Petrol. Technol. [Internet]. 2015Dec.31 [cited 2021Sep.25];2(2):45-52. Available from: