NOx emission characteristics of CH4 versus O2/CO2 counterflow non-premixed flames at various pressures up to 300 atm

摘要: Abstract The characteristics of NOx emission oxy-methane combustor operating over a wide range pressure (1–300 atm) are investigated by performing one-dimensional numerical simulations CH4 versus O2/CO2 counterflow non-premixed flames. amount is estimated varying the pressure, oxygen mole fraction, strain rate, and N2 in fuel oxidizer streams. It found that ingress stream more critical to than because reaction zone for formation develops side. also non-monotonically varies with increase at relatively-low fraction. pathway analysis demonstrates such non-monotonic behavior mainly attributed reduction via prompt reburn pathways high pressure. sensitivity several chemical kinetic mechanisms examined under various combustion conditions, which reveals important formation/consumption.