(273d) Effect of Composition Variation of Syngas Mixtures on NOx Formation at High Pressure
In this study, a high-pressure burner facility capable of operating at pressures up to 15 bar, was designed and fabricated to simulate syngas combustion in a gas turbine. Syngas consisting mainly of H2 and CO was blended with components such as nitric oxide (NO), nitrogen dioxide (NO2) and trace amount of hydrocarbons prior to combustion at high pressure. Hot combustion products were supplied to the high pressure vessel by a flat flame burner operating with lean, premixed syngas-air mixtures with various H2/CO ratios ranging between 0.25-1.0 and equivalence ratios between 0.5-1.0. Detailed NOx speciation measurements in the post-flame region were conducted for different fuel compositions at various pressures up to 10 bar using Fourier transform infrared (FTIR) spectrometer. The experimental data generated from this project can be used to validate/develop kinetic models to predict NOx emissions.