Formation and destruction of N2O in pulverized fuel combustion environments between 750 and 970 °C

Martti Aho, Jarmo Rantanen, Veli Linna

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Formation and destruction of N2O were investigated under dilute pulverized coal combustion conditions in an entrained-flow reactor. The effects of temperature, atmosphere (oxidizing and reducing) and reaction environment (homogeneous and heterogeneous) were studied. N2O was measured on-line by FT-i.r. spectrometry.
No N2O evolution occurred above 950 °C. At oxygen concentrations below 1.5%, in the presence of CO, the N2O already formed was rapidly destroyed above 900 °C and fairly rapidly even at 830 °C. At high oxygen concentrations, destruction occurred more slowly, and not at all below 900 °C.
Heterogeneous reactions did not noticeably increase the destruction rate of N2O in a dilute fuel-air suspension. Low ratio of coal favoured N2O formation.
The results should assist the design of low-temperature combustors that generate only low levels of N2O.
Original languageEnglish
Pages (from-to)957-961
Issue number8
Publication statusPublished - 1990
MoE publication typeA1 Journal article-refereed


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