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Heterogeneous reaction of HOBr with HBr and HCl on ice surfaces at 228 K
Author(s) -
Abbatt Jonathan P. D.
Publication year - 1994
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 - 10.1029/94gl00775
Subject(s) - reactivity (psychology) , chemistry , sulfuric acid , ozone , ozone depletion , atmospheric chemistry , analytical chemistry (journal) , inorganic chemistry , environmental chemistry , organic chemistry , alternative medicine , medicine , pathology
Motivated by the recent observations of springtime ozone loss in the Arctic boundary layer, we have studied the heterogeneous reactions HOBr + HBr → Br 2 + H 2 O and HOBr + HCl → BrCl + H 2 O using a low temperature flow tube coupled to a mass spectrometer. By monitoring the decay of HOBr in an excess of either HBr or HCl, both reactions have been shown to occur readily on ice surfaces at 228 K with reaction probabilities of 0.12 (±0.03) and 0.25 (+0.10/−0.05), respectively. The gasphase reaction products, Br 2 and BrCl, have been observed. Also, it has been shown that HOBr interacts strongly with supercooled 60 wt % sulfuric acid solutions, being taken up with a sticking coefficient of greater than 0.06. The atmospheric implications of the heterogeneous reactivity of HOBr and HBr are discussed.