Uptake of HCl and HOCl onto sulfuric acid. Solubilities, diffusivities, and reaction
- NOAA Aeronomy Lab., Boulder, CO (United States) Univ. of Colorado, Boulder, CO (United States)
The interaction of HOCl and HCl vapors with liquid sulfuric acid surfaces was studied in a flow tube equipped with chemical ionization mass spectrometry detection. Time-dependent uptake of HCl and HOCl was measured. A methodology for deriving the value of the quantity H[radical]D[sub 1], (the product of the Henry's law coefficient and the square root of the liquid-phase diffusion coefficient) is discussed. The partial pressures of HCl over HCl-doped sulfuric acid solutions were also measured to directly determine H for HCl (H[sub HCl]*). Using the measured values of H[sub HCl]* and H[sub HCl]*[radical]D[sub 1], the value of D[sub 1] for HCl in 50 wt % sulfuric acid was extracted. Values for H[sub HOCl] and for the second-order rate coefficient for the reaction between dissolved HOCl and HCl were also obtained. The application of these results to modeling stratospheric heterogeneous processes in sulfuric acid aerosols is discussed. 31 refs., 14 refs., 3 tabs.
- OSTI ID:
- 5424403
- Journal Information:
- Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:47; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
Similar Records
HOBr in sulfuric acid solutions: Solubility and reaction with HCl as a function of temperature and concentration
Heterogeneous reactions in sulfuric acid aerosols: A framework for model calculations
Related Subjects
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOLS
CHEMICAL REACTION KINETICS
CHLORINE COMPOUNDS
COLLOIDS
DATA
DIFFUSION
DISPERSIONS
EARTH ATMOSPHERE
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYPOCHLOROUS ACID
INFORMATION
INORGANIC ACIDS
KINETICS
MASS SPECTROSCOPY
NUMERICAL DATA
OZONE
REACTION KINETICS
SOLS
SOLUBILITY
SPECTROSCOPY
STRATOSPHERE
SULFURIC ACID