The reduction of NO by reactions with primary coal tar and other volatiles under fuel-rich conditions was studied using a tubular-flow reactor coupled to a fluidized-bed reactor. The primary coal volatiles were prepared at a heating rate of 104 K/sec in the fluidized-bed reactor. Reactions of coal volatiles led to greater NO reductions than reactions with methane. NO reduction by coal volatiles occurred at much lower oxygen concentrations, indicating the higher reactivity of the coal volatiles compared to that of methane. Increases in HCN and HNCO yields occurred simultaneously with the decrease in NO in experiments with the coal volatiles, showing that the NO is reduced to these two species under the conditions of this study. Kinetic modeling of the experiments with coal volatiles using a highly simplified model for the coal tars reasonably predicted the major gas-phase species but not the HNCO and NH3 yields. Original is an abstract.
|Number of pages||2|
|Journal||International Symposium on Combustion Abstracts of Accepted Papers|
|Publication status||Published - 2000|