煤热解过程中含氮气相产物转化规律的实验研究

The conversion of nitrogenous gas products during coal pyrolysis was investigated in the drop tube reactor. Four raw coals and two demineralized coals have been used to pyrolyse at 500℃，700℃，900℃and1100℃. The pyrolysis results indicate that the yields of N2 and NO precursors, such as HCN and NH3, increase with increased temperature. The coal type has significant effect on the yield of nitrogenous gas products. For low rank coal sample, the conversion ratio of fuel nitrogen is higher. The most of fuel nitrogen in high rank coals is built into condensed aromatic structures to form CharN. The mineral substances in coal promote the conversion of fuel nitrogen to N2, but they suppress the conversion of fuel nitrogen to HCN and NH3.