HU Xiaowei, WU Wangchen, YAO Hong. Influence of steam on NO formation during oxy-coal combustion[J]. CIESC Journal, 2014, (11): 4564-4570.DOI: 10.3969/j.issn.0438-1157.2014.11.050.
The influence of H2O on NO formation during oxy-coal combustion was investigated in a drop-tube furnace. A bituminous coal was selected and burnt at temperature of 1273 K under O2/N2
O2/CO2 and O2/CO2/H2O atmospheres
respectively. At different O2 contents 5%
21%
and 30%
the samples were analyzed for increasing residence time from 0.2 s to 1.1 s. The results show that NO formation is suppressed by addition of H2O. The mechanism of NO reduction is due to the change of volatile-N chemistry with H2O addition. The H2O influence on homogeneous NO formation goes up with the increase of O2 concentration.