Chemical Modeling of Fire Gases

Abstract

When a fuel containing C, H, and O burns, CO₂ and H₂O are the major combustion products and, depending on the conditions, CO, unburnt gasified fuel, and other products of incomplete combustion are produced. In this paper, chemical modeling to calculate rates of generation and mass fractions of various products in reference to the fuel/O₂ equivalence ratio is presented. In addition to chemical balances, empirical CO/CO₂ ratios are used. CO is con sidered to be the most significant factor for toxicity hazard assessment in build ing fires. This modeling provides generation rates and mass fractions of CO among other species of gases. This model can be used as a sub-model in fire models for estimating CO.

Keywords

fire modeling CO estimation CO/CO2 ratio equivalence ratio.

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