TY - JOUR AU - Chaisermtawan, Prateep AU - Jarungthammachote, Sompop AU - Chuepeng, Sathaporn AU - Kiatiwat, Thanya PY - 2012 TI - Gaseous Emissions and Combustion Efficiency Analysis of Hydrogen-Diesel Dual Fuel Engine under Fuel-Lean Condition JF - American Journal of Applied Sciences VL - 9 IS - 11 DO - 10.3844/ajassp.2012.1813.1817 UR - https://thescipub.com/abstract/ajassp.2012.1813.1817 AB - 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.