Premium
A kinetics study of the homogeneous and heterogeneous components of the HCl + ClONO2 reaction
Author(s) -
Friedl Randall R.,
Goble James H.,
Sander Stanley P.
Publication year - 1986
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/gl013i012p01351
Subject(s) - reaction rate constant , chemical kinetics , kinetics , reaction rate , stratosphere , order of reaction , chemical reaction , homogeneous , adsorption , chemistry , reaction mechanism , thermodynamics , analytical chemistry (journal) , catalysis , environmental chemistry , meteorology , physics , organic chemistry , quantum mechanics
The kinetics of the reaction HCl + ClONO 2 → Cl 2 + HNO 3 were investigated at 298 K using a flow reactor with FTIR analysis to assess the importance of this reaction for stratospheric chemistry. The observed reaction was characteristic of a heterogeneous process; an upper limit of 5 × 10 −18 cm³ molecule −1 s −1 was obtained for the homogeneous gas phase rate constant. From calculations of the first order wall rate constant, estimates were made of the reaction rate on stratospheric aerosols. Because both HCl and ClONO 2 need to be adsorbed on the particle surface, the reaction will be of negligible importance under most stratospheric conditions.