Vm. Zamansky et al., OXIDATION OF NO TO NO2 BY HYDROGEN-PEROXIDE AND ITS MIXTURES WITH METHANOL IN NATURAL-GAS AND COAL COMBUSTION GASES, Combustion science and technology, 120(1-6), 1996, pp. 255-272
The CombiNO(x) process includes a family of NOx control technologies (
reburning, urea injection, methanol injection, and wet scrubbing) capa
ble of reducing NOx emissions from stationary combustion sources by ab
out 90%. However, methanol forms CO in flue gas as a byproduct Hydroge
n peroxide and H2O2/CH3OH mixtures decrease the amount of CO formed fr
om CH3OH and can substitute methanol in the CombiNO(x) process. This p
aper presents experimental and modeling results on H2O2 and H2O2/CH3OH
reactions with NO in a 300 kW combustor firing natural gas and coal.
Maximum NO oxidation was achieved at 750-820 K for injection of H2O2 a
nd 1:1 H2O2/CH3OH mixture, and at 850-930 K for CH3OH injection. NO-to
-NO2 conversion of 90-98% and 64-76% was achieved at an additive NO mo
lar ratio of 1.5 during natural gas and coal firing, respectively. Inf
luence of initial NO concentrations, the additive/NO ratio, oxygen and
SO2 concentrations, and the presence of fly ash on process performanc
e is discussed. Experimental results are qualitatively explained by ki
netic modeling.