Research Article Open Access

Gaseous Emissions and Combustion Efficiency Analysis of Hydrogen-Diesel Dual Fuel Engine under Fuel-Lean Condition

Prateep Chaisermtawan1, Sompop Jarungthammachote1, Sathaporn Chuepeng1 and Thanya Kiatiwat2
  • 1 1Department of Mechanical Engineering, Faculty of Engineering at Si Racha, Kasetsart University, 199 Sukhumvit Road, Chonburi 20230, Thailand
  • 2 Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngamwongwan Road, Bangkok 10900, Thailand


Exhaust gas emissions from diesel engine combustion using alternative fuel may change in their quantities that can affect exhaust gas after-treatment devices and environmental ambient. This study presents theoretical analysis of combustion generated emissions and efficiency of hydrogen-diesel duel fuel in fuel-lean condition. A chemical equilibrium method by minimizing Gibbs free energy is employed to estimate exhaust gas products from diesel and hydrogen-diesel mode combustion. The combustion products, e.g., unburned hydrocarbons (CH4), hydrogen (H2), carbon dioxide (CO2), carbon monoxide (CO) are comparatively investigated, based upon similar specific energy input. Subsequently, the obtained combustible products (CH4, H2 and CO) are used to calculate combustion efficiency, based upon chemical energy left in waste exhaust gases. The main findings are associated with the reduction in CO2 corresponding to the increase in combustion efficiency in hydrogen-diesel combustion mode, depending on relative air-to-fuel ratios. Meanwhile, the CH4, H2 and CO contents in the flue gas increase in the operating conditions used.

American Journal of Applied Sciences
Volume 9 No. 11, 2012, 1813-1817


Submitted On: 11 July 2012 Published On: 1 September 2012

How to Cite: Chaisermtawan, P., Jarungthammachote, S., Chuepeng, S. & Kiatiwat, T. (2012). Gaseous Emissions and Combustion Efficiency Analysis of Hydrogen-Diesel Dual Fuel Engine under Fuel-Lean Condition. American Journal of Applied Sciences, 9(11), 1813-1817.

  • 20 Citations



  • Equilibrium Analysis
  • Hydrogen
  • Dual Fuel
  • Diesel Engine
  • Emissions
  • Combustion Efficiency