A-20 ガス化ガス燃焼のフュエルNOx生成特性の予測(ガス燃焼,一般講演)

概要

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Gasified fuels have nitrogenous compounds of NH_3 and HCN, those fuel-N compounds cannot be removed by using hot/dry-type synthetic gas cleanup method that improves plant thermal efficiency and are oxidized into the fuel-NOx in combustion processes. Fuel-NOx constitutes the majority of NOx emissions in the exhaust. In the combustion processes of those CO, H_2 and CH_4 mixture fuels, however the oxidation characteristics of the nitrogenous compounds in fuels are different from the case of conventional hydrocarbon fuels, and influenced by the fuel constituent and combustion methods. In this paper, the influences of the fuel constituent on fuel-NOx emission characteristics in each combustion method and its mechanism are clarified by analytical examination of obtained experimental data. Therefore a basic prediction methodology of conversion rate of nitrogenous compounds to fuel-NOx is set up both in two-stage combustion to reduce fuel-NOx emissions and in non staged combustion.
2009-10-21