Characteristics of NO release for the combustion of chars and volatiles of Anthracite

The experiments on the combustion of volatile and char of anthracite were carried out separately in a fixed-bed reactor. The NO release characteristics of volatile N and char N combustion and the relative contribution of volatile N and char N to NO formation of coal combustion were studied. It is found that coal N, volatile N and char N conversion increases as the excess air coefficient and temperature increase. Char N is the primary resources of NO formation during anthracite combustion. The coal N conversion is less than the total conversion of volatile N and char N, which is resulted from the interaction between volatile and char during coal combustion as it is in the reductive or oxidative atmosphere.