TEMPERATURA ADIABÁTICA Y EQUILIBRIO QUÍMICO DE LA COMBUSTIÓN REAL. INFLUENCIA DEL HIDRÓGENO PRESENTE

Abstract

The adiabatic temperature is the maximum theoretical temperature that you can see in an actual fuel’s combustion in the absence of heat transfer, which for thermodynamic reasons is not feasible to avoid, so the observed effective temperature is lower than the adiabatic temperature. The estimation of the adiabatic temperature must be done based on the composition of chemical equilibrium of the species present in the combustion’s flame. The problem is then defined as a complex algorithm that oblige to iterate
the adiabatic temperature together with the species’ composition at the same adiabatic temperature according to the specific process of chemical equilibrium, which in our case is represented by the wet gas mechanism of reaction and considers also the NOx production due to thermal chemical reaction of oxygen and nitrogen and the existence or not of hydrogen in that composition. This work presents a comparative estimate of the adiabatic temperature from the composition obtained trough the reduced combustion to
the oxidizing complete combustion as the reference using methane, the major component of commercial natural gas, as well as advanced concepts derived from the thermodynamic equilibrium diagrams of combustion as the basis for the simulated real combustion. The calculus of the estimation and the comparison will be do it in the range: lower limit (ϕ= 0,5), to upper limit (ϕ= 2,0) of inflammation using atmospheric air as oxidant.
Keywords: adiabatic temperature, oxidizing complete combustion, real burning hydrocarbons.