American Journal of Applied Sciences

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

Prateep Chaisermtawan, Sompop Jarungthammachote, Sathaporn Chuepeng and Thanya Kiatiwat

DOI : 10.3844/ajassp.2012.1813.1817

American Journal of Applied Sciences

Volume 9, Issue 11

Pages 1813-1817

Abstract

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.

Copyright

© 2012 Prateep Chaisermtawan, Sompop Jarungthammachote, Sathaporn Chuepeng and Thanya Kiatiwat. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.