Experimental results are presented on the reduction of NO by char particles prepared from a Chinese low-volatile coal. The experiment was conducted in a drop-tube furnace at 1173 to 1323 K. Kinetic parameters of the global reaction of NO with char were determined, and the effects on these kinetic parameters of adding the catalyst KOH to the char particles and also of [O-2] in the flue gas were studied. The results show that KOH can increase the frequency factor and reduce the activation energy of the reduction of NO by char. However, the benefit of increasing the KOH content in char particles decreases when there is more than 1.0 wt% of the catalyst in the char. The activation energy of the global NO-char reaction is shown to be independent of [O-2], but the frequency factor strongly depends on the equivalence ratio under oxygen-lean conditions. 0 2003 The Combustion Institute. All rights reserved.