燃煤流化床中N_2O生成与分解的均相反应机理

Homogeneous Reaction Mechanisms of Nitrous Oxide Formation and Decomposition in the Fluidized Bed of Coal Combustion

介绍由燃料氮生成Ｎ２Ｏ的主要途径是：ＮＣＯ→ＮＯ→Ｎ２Ｏ＋ＣＯ，ＮＨ＋ＮＯ→Ｎ２Ｏ＋Ｈ；分解Ｎ２Ｏ的主要反应是：Ｎ２Ｏ＋Ｈ→Ｎ２十ＯＨ。分析了挥发分中的燃料氮成分、煤种、炉内温度、过量空气系数、分级与单级燃烧方式等因素对Ｎ２Ｏ排放的影响。

he homogeneous reaction mechanisms of nitrous oxide formation and decomPOSition in the fluidized bed of coal combustion were studied,indicating that the baths of nitrous oxide (N2O) formation from nitrogen contained in fuel mainly include: NCO+NO→N2O+CO and NH+NO→N2O+H;and the main reaction of N2O decomposition are:N2O+H→N2+OH. An analysis was also made for the effectS of the factors such as compeition of (uelbounded nitrogen compounds in volatiles, kinds of coal, temperature in the fluidized bed, coefficient of excess air, number of singes, and the combustion pattern in a single sarge, on the emission of N2O from the fluidized bed coal combustor.