微粉炭燃焼における NOx 生成に関するリアクターネットワークモデルの開発

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  • Development of a reactor network model for NOx generation in pulverized coal combustion

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A simulation was conducted for the purpose of predicting the concentration of nitrogen oxides (NOx) generated from pulverized coal combustion. In this research, simulations were carried out for each tube flow furnace and turbulent flow furnace and the obtained results are compared. The reactor network model of each furnace was also examined. We investigate the effects of Volatile N, which greatly contributes to the generation of NO. Although the peak NO concentration was largely reproducible, the actual NOx profile obtained during the initial and reduction stages during combustion did not match the simulated NOx profile. It was found that the NOx formation profile changed greatly depending on the composition of the reactor model. Most of the generated NO was found to originate from Volatile N. The future challenges in this study are further optimization of the reactor model and improvement of the rate constant of elementary reaction in the NO reduction stage.

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