Abstract
Abstract A detailed kinetic model for moist CO oxidation chemistry inhibited by HCl is developed and analyzed by sensitivity and reaction flux analyses. The model is validated against experimental data obtained from an atmospheric pressure flow reactor. The kinetics were studied experimentally and numerically with dilute mixtures of CO (∼ 1%), H2O (∼ 0.5%), O2 and HCl reacting in N2 at a temperature near 1000 K. The effect of increasing the Cl/H ratio was investigated by increasing HCl concentrations from 0 to 200 ppm while the effect of excess O2 was studied by varying the fuel oxidizer equivalence ratio from 1.0 to 0.33. The results showed that small quantities of HCl inhibit CO oxidation and that increasing O2 concentrations to stoichiometric mixtures further decreases the oxidation rate, a counter intuitive result. The model predictions for CO, O2, CO2 and temperature profiles agree well with the experimental results (within 10%). Thus the inhibiting characteristics of HCl are well described. However,...
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