Combustion Modeling of Practical Chemical Equilibrium for Estimating 10 species of Combustion Products

Abstract

This paper deals with a combustion modeling of practical chemical equilibrium for estimating 10 species of combustion products, i.e. carbon dioxide (CO₂), water (H₂O), nitrogen (N₂), oxygen (O₂), carbon monoxide (CO), hydrogen (H₂), hydrogen (H), oxygen (O), hydroxy (OH) and nitric oxide (NO).  Ferguson modeling is adopted and the curve fitting of the chemical equilibrium performed by Olikala-Borman is also conducted by entering the values of pressure, flame temperature and atomic contents of fuel. Predicted results of Practical Chemical Equilibrium (PCE) at 1 bar of combustion pressure are validated HPFLAME Software (adi-turn). The tendency of mole fraction of product species is agreeable and absolute error for all simulation ranges is 3.65%. The amount of exhaust gas, namely CO₂, CO and NO resulting in air pollution was investigated. The pressure and equivalence ratio are set at 1 bar and unity (stoichiometric), respectively. The results show that the species’ mole fraction strongly depends on more temperature than pressure of combustion. For comparing mole fraction of two fuel combustion, LPG is always higher quantitative than methane because LPG needs more air than methane for complete combustion.