高温微粉炭燃焼場におけるN_2O生成・消滅特性とその機構

概要

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Characteristics and reaction mechanisms of N_2O formation/destruction in high-temperature pulverized coal combustion are studied experimentally and theoretically. The experimental results show that N_2O is mainly formed during the initial stage of volatile matter combustion, but that the N_2O concentration at the exit of the furnace reaches a low value. The maximum N_2O concentrations in different types of coal depend on the temperature gradient, the content of volatile matter and the flame structure around coal particles. N_2O concentration at the exit increases with increasing air ratio. By numerical analysis of combustion behavior using a single-particle combustion model, it becomes clear that N_2O is mainly produced by NH (formed by the decomposition of NH_3) and N_2 in the initial volatile matter combustion region, after which N_2O is formed by NCO produced by the oxidation of HCN ; however, N_2O is decomposed by H radicals.
一般社団法人日本機械学会の論文
1993-08-25