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Heterogeneous interactions of chlorine nitrate, hydrogen chloride, and nitric acid with sulfuric acid surfaces at stratospheric temperatures
Author(s) -
Tolbert Margaret A.,
Rossi Michel J.,
Golden David M.
Publication year - 1988
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/gl015i008p00847
Subject(s) - sulfuric acid , nitric acid , hydrogen chloride , chlorine , inorganic chemistry , hydrogen , chemistry , nitrate , chloride , analytical chemistry (journal) , environmental chemistry , organic chemistry
The heterogeneous interactions of ClONO 2 , HCl and HNO 3 with sulfuric acid surfaces were studied using a Knudsen cell flow reactor. The surfaces studied, chosen to simulate global stratospheric particulate, were composed of 65‐75% H 2 SO 4 solutions at temperatures in the range −63 to −43°C. Heterogeneous loss, but not reaction, of HNO 3 and HCl occurred on these surfaces and the measured sticking coefficients are reported. Chlorine nitrate reacted on the cold sulfuric acid surfaces, producing gas‐phase HOCl and condensed HNO 3 . ClONO 2 also reacted with HCl dissolved in the 65% H 2 SO 4 solution at −63°C, forming gaseous Cl 2 . In all cases studied, the sticking and/or reaction coefficients were much larger for the 65% H 2 SO 4 solution at −63°C than for the 75% solution at −43°C.