COUPLING OF CHEMICAL-KINETICS, GAS-DYNAMICS, AND CHARGED-PARTICLE KINETICS MODELS FOR THE ANALYSIS OF NO REDUCTION FROM FLUE-GASES

A chemical kinetics model is developed to analyze the time evolution o f the different main species involved in a flue gas initially stressed by a pulsed corona discharge at the atmospheric pressure and includin g N-2, O-2, H2O, and CO2 with a few ppm of NO. This present chemical k inetics model is coupled to a gas dynamics model used to analyze the r adial expansion of the gas in the ionized channel created during the d ischarge phase. It is also meant to analyze the gas heating due to the Joule effect. This chemical kinetics model is also coupled to charged particle kinetics models based on a Boltzmann equation model to calcu late the electron-molecule reaction coefficients in the flue gas and o n a Monte Carlo code to estimate the energy and momentum transfer term s relative to ion-molecule collisions which are the input data for the gas dynamics model. It is shown, in particular, that the evolution of the radicals and the oxides is substantially affected by the gas temp erature rise (from the initial value of 300 K up to 750 K near the ano de) thus emphasizing the present coupling between gas dynamics, charge d particle, and chemical kinetics models. (C) 1997 American Institute of Physics.