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NOx reduction and NO2 emission characteristics in rich-lean combustion of hydrogen

机译：氢气浓稀燃烧中的NOx还原和NO2排放特性

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Hydrogen is a clean alternative to conventional hydrocarbon fuels, but it is very important to reduce the nitrogen oxides (NOx) emissions generated by hydrogen combustion. The rich-lean combustion or staged combustion is known to reduce NOx emissions from continuous combustion burners such as gas turbines and boilers, and NOx reduction effects have been demonstrated for hydrocarbon fuels. The authors applied rich-lean combustion to a hydrogen gas turbine and showed its NOx reduction effect in previous research. The present study focused on experimental measurements of NO and NO2 emissions from a co-axial rich-lean burner fueled with hydrogen. The results werecompared with diffusion combustion and methane rich-lean combustion. Significant reductions in NO and NO2 were achieved with rich-lean combustion. The NO and NO2 reduction effects by rich-lean combustion relative to conventional diffusion combustion were higher with hydrogen than with methane.
机译：氢是常规碳氢燃料的清洁替代品，但是减少氢燃烧产生的氮氧化物（NOx）排放非常重要。已知稀混合气燃烧或分段燃烧可减少连续燃烧器（例如燃气轮机和锅炉）的NOx排放，并且已经证明了碳氢化合物燃料的NOx减少效果。作者将稀薄燃烧应用于氢气涡轮机，并在先前的研究中表明了其NOx还原效果。本研究的重点是利用富氢稀燃同轴燃烧器燃烧NO和NO2的实验测量。将结果与扩散燃烧和富甲烷稀燃燃烧进行了比较。浓空燃比燃烧可显着减少NO和NO2的排放。相对于传统的扩散燃烧，浓稀薄燃烧对NO和NO2的还原效果高于氢。

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