Development of reduced mechanisms applicable to CFD modeling of NOx emissions from biomass combustion

i Preface The report deals with development of reduced kinetic mechanisms for ammonia oxidation that can be used for CFD modeling of NO x formation in biomass combustors. A computer code CARM was tested for generation of the reduced mechanisms. Berkeley. We want to thank him for supplying us with the code, as well as helping us to get started. The report firstly describes shortly the general method for developing of the reduced mechanisms. Secondly, the development of the CO/H 2 /NH 3 /O 2 mechanism is described, and its performance is evaluated by comparing its predictions to full chemistry results and to results by alternative reduced mechanisms. Finally, the applicability of the mechanism is discussed in CFD calculations. The work has been a part of the project No. 203 " Models for simulation of combustion and pollutants " of the CODE Technology Programme that was initiated by the National Technology Agency in Finland (Tekes).