Ammonia (NH) dissociation, oxidation, and associated nitric oxide (NO) emission in a vertical cylindrical quartz reactor is investigated to establish the effect of temperature (1000 K–1400 K), initial NH concentration (2%, 4%, 6%, 8%, 10%) and flowrate (250 mL/min, 500 mL/min, 750 mL/min). Ammonia oxidation experiments also examine the effect of equivalence ratio (ɸ = 0.8, 0.9, 1.0, 1.1). The NH and O conversions, N yield, and NO emission are determined by analysing the reactor effluent compositions. Ammonia dissociation of <6% is observed for all conditions tested. Ammonia oxidation is initiated at ∼1100 K, with majority of NH conversion occurring at 1200 K–1300 K before completion at ∼1325 K. NO emission becomes significant at temperatures >1300 K for ɸ ≤ 1.0 and increases with decreasing equivalence ratio. Under fuel-lean conditions, increasing initial NH concentration increases NO emission. Fuel-rich conditions return negligible NO, attributed to the reductive effect of excessive NH.

中文翻译：

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立流反应器中氨解离、氧化和NO排放的实验研究

研究立式圆柱形石英反应器中氨 (NH) 解离、氧化和相关一氧化氮 (NO) 排放，以确定温度 (1000 K–1400 K)、初始 NH 浓度（2%、4%、6%）的影响、8%、10%）和流速（250 mL/min、500 mL/min、750 mL/min）。氨氧化实验还检验了当量比 (ɸ = 0.8, 0.9, 1.0, 1.1) 的影响。 NH 和 O 转化率、N 产率和 NO 排放量通过分析反应器流出物成分来确定。在所有测试条件下观察到氨解离<6%。氨氧化在〜1100 K开始，大部分NH转化发生在1200 K–1300 K，然后在〜1325 K完成。NO排放在温度>1300 K（ɸ ≤ 1.0）时变得显着，并随着当量比的降低而增加。在贫燃料条件下，增加初始 NH 浓度会增加 NO 排放。由于过量 NH 的还原作用，富燃料条件下返回的 NO 可以忽略不计。