Formation of no and NH4+ ions in the low-temperature peripheral zone of a flame
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It is found that charged nitrogen oxides are formed not only in the front and the high-temperature combustion-product zone of a Bunsen-type flame but also in the relatively cold external region of the flame close to the burner nozzle. The peripheral NO+ is formed from atmospheric oxygen drawn in from outside the flame. The concentration of NO+ ions increases as the mixture is enriched with fuel. Possible pathways by which the peripheral NO+ ions may appear are considered. It is suggested that their precursor is the NH4+ ion formed from ammonia.
KeywordsOxide Oxygen Nitrogen Ammonia Burner
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