Simulation of NOx Reduction with Gas Fuels Based on the Elementary Kinetics

In order to control the chemical reaction process to the benefit of the direction of NO_x reduction, the further research and discussion on NO_x reduction mechanism with gas fuels was performed. Based on the detailed chemical kinetic mechanism of Glarborg(2000), reaction mechanism of NO_x reduction (RMNR) was constructed. It consists of 362 elementary reactions and 62 chemical species and applies to study NO_x. reduction with gas fuels including H₂, CO, CH₄, pyrolysis gas and so on. And the chemical reactions characteristics of fuels were also explored. The RMNR simulation results show that the chemical characteristics of NO_x reduction with different kinds of gas fuels can well be predicted. The effects of main elementary reactions on NO_x reduction are analyzed through the use of reaction sensitivity coefficient. As it involves a number of oxidation and reduction reactions in the process of NO_x reduction, the quantitative effects of NO_x reduction can not be completely and accurately simulated. Therefore, NO_x reduction mechanism of gas fuels needs to be constantly studied and improved.