Heterogeneous chemistry of bromine species in sulfuric acid under stratospheric conditions

Details Heterogeneous chemistry of bromine species in sulfuric acid under stratospheric conditions Heterogeneous chemistry of bromine species in sulfuric acid under stratospheric conditions

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..385h&link_type=abstract

Geophysical Research Letters, Volume 22, Issue 4, p. 385-388

Physics

72

Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Cloud Physics And Chemistry

Scientific paper

The first-order loss rate coefficients for BrONO2 on 45, 60, and 70 wt% sulfuric acid solutions were measured in a wettted-wall flow tube reactor. The BrONO2 reactive uptake coefficients were >0.2 and HOBr was the product. When HCl was added to the acid, production of HOBr was still observed but the main product was BrCl. Based on these observations it is concluded that the conversion of BrONO2 to active forms such as HOBr and BrCl on sulfate aerosols in the stratosphere is very rapid. The efficiency of the hydrolysis of BrONO2 suggests that, even for nonvolcanic conditions, much of the BrONO2 in the stratosphere can be converted to HOBr at night.

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