ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Chemistry and Emissions of Nitrogen Oxides (NO, N0₂, N₂0) in Combustion of Solid Fuels I. Heterogeneous Reactions - NO + N0₂

K. Svoboda, J. Čermák, and O. Trnka

Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, CZ-165 02 Prague

Abstract: Nitrogen oxides (NO + NO₂) belong to the most important gaseous pollutants from combustion processes. This review is focused on the mechanism and reaction kinetics of fuel nitrogen conversion to NO in combustion of solid fuels (coal, peat, wood). Mechanism and kinetics of heterogeneous catalyzed and gas-solid noncatalyzed reactions of NO formation in solid fuel devolatilization and char combustion have been studied in terms of NO-precursor release (NN₃ + HCN), precursor oxidation and decomposition. Destruction reactions (interactions and reduction reactions) of NO, mainly caused by char, CO and H₂, are very important for final emissions of NO in combustion of solid fuels. Application of heterogeneous mechanisms and kinetics of fuel N → NO formation and NO destruction is mainly in fluidized bed combustion, partly in pulverized coal combustion (where thermal NO formation may be significant).

Full paper in Portable Document Format: 542a104.pdf

Chemical Papers 54 (2) 104–117 (2000)