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Reaction of Nitrogen Oxides with Black Carbon: An FT-IR Study
Volume 42, Number 4 (June 1988) Page 674-680
Smith, D.M.; Welch, W.F.; Graham, S.M.; Chughtai, A.R.; Wicke, Brian G.; Grady, Karen A.
Qualitative and quantitative studies of the reaction of black carbon with the oxides of nitrogen, including NO, NO2/N2O4, N2O, and N2O3, have been carried out with the use of Fourier transform infrared spectroscopy (FT-IR). The active reactant is shown to be NO2, whether it acts as a disproportionation product or as an impurity in the gas under study. FT-IR spectra of the surface species identify them as resulting from reaction of carbon with NO2. For paraffin candle soot which was exposed simultaneously to oxygen atoms, and nitric oxide at 298 K, the surface species also are due to NO2, formed by oxidative adsorption of NO on the soot surface.