Calculations are described that illustrate the adiabatic flame temperature under the following parameter variations: 1. Type of fuel (CHONS amounts specified). 2. Different equivalence ratios. 3. Type of oxidant (air or oxygen). 4. With and without limited dissociation of CO2 and H2O, and more detailed dissociation reactions. 5. With “air” as the oxidant, the volume fraction of oxygen is specified. 6. The inlet temperatures of the fuel and oxidant streams individually are specified. Computations are made of flame temperature and product species composition of fuel combustion with oxygen-deficient air. The fuel is specified by way of its CHONS content and the “air” by way of the volume percent of oxygen, and the other components of “air” (nitrogen, argon, helium and carbon dioxide), each specified by the user. The temperature of each inlet (fuel and “air”) is specified by the user. The methodology and computer code takes as input also the equivalence ratio. Then, results of adiabatic flame temperature are calculated along with the equilibrium product species both with and without dissociation. The computer code is user-friendly with application directly to the new trend toward high temperature air combustion processes, for which some useful results are generated and discussed.

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