While CaO is added to the coal, SO2 emissions can be reduced, but NOx emissions will be increased, the conversion ratio of coal nitrogen increases with the Ca/N.

• 煤燃烧过程中添加CaO对硫的脱除有很好的作用，但同时带来负面效果，即NOX排放浓度增加, 随着添加剂Ca/N的增加，氮转化率增加。