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The heterogeneous generation of N 2 O from exhaust gases of combustion: A laboratory study
Author(s) -
Pires M.,
Rossi M. J.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl03339
Subject(s) - flue gas , combustion , soot , exhaust gas , adsorption , environmental chemistry , fly ash , chemistry , mineralogy , analytical chemistry (journal) , organic chemistry
The heterogeneous reaction of NO, SO 2 and O 2 in the presence of condensed or adsorbed H 2 O results in high yields of N 2 O under conditions mimicking flue gas from fossil fuel combustion. We observed a strong influence of the nature of the substrate surface on the rate of N 2 O formation. The maximum rate of N 2 O formation of 350 ppm h −1 occurred on soot and fly ash at relative humidities approaching 100% at 368K final yields of 80–100% N 2 O. The mechanism corresponds to a complex multiphase system in which NO 2 seems to be a key species. The observed abundance of NO 2 does not correspond to the one predicted by the simple mechanism by Lyon and Cole (1988).