Rate constants for reactions between atmospheric reservoir species. 1. HCL

Journal Article · Thu Jul 27 04:00:00 EDT 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100352a026· OSTI ID:6985889

Leu, Mingtaun; Hatakeyama, Shiro; Hsu, Kuangjung ^[1]

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1. California Institute of Technology, Pasadena (USA)

The kinetics of the reactions of HCl with ClONO{sub 2}, N{sub 2}O{sub 5}, O{sub 3}, and HO{sub 2}NO{sub 2} have been investigated by using a large-volume static reactor and a Fourier transform spectrometer (FTIR) at 296 K. The upper limits for the homogeneous gas-phase reaction rates of the ClONO{sub 2} + HCl, N{sub 2}O{sub 5} + HCl, O{sub 3} + HCl, and HO{sub 2}NO{sub 2} + HCl reactions were found to be 8.4 {times} 10{sup {minus}21}, 8.4 {times} 10{sup {minus}21}, 4.7 {times} 10{sup {minus}24}, and 9.0 {times} 10{sup {minus}22} (all in unit of cm{sup 3} s{sup {minus}1}), respectively. The heterogeneous nature of the ClONO{sub 2} + CHl and N{sub 2}O{sub 5} + HCl reactions are characterized in terms of the Langmuir-Rideal mechanism. The yields of HNO{sub 3} were observed to be 0.94 {plus minus} 0.14 and 1.10 {plus minus} 0.12 for the ClONO{sub 2} + HCl and N{sub 2}O{sub 5} + HCl reactions, respectively, and the yield of ClNO{sub 2} was found to be 0.84 {plus minus} 0.10 for the N{sub 2}O{sub 5} + HCl reaction. The quoted errors represent one standard deviation of the measurement. In addition, an upper limit of 1.6 {times} 10{sup {minus}19} cm{sup 3} s{sup {minus}1} at 296 K for the reaction of NO{sub 3} with HCl was also obtained in this study. These results may be important in the elucidation of the role played by heterogeneous reactions in the development of the springtime Antarctic ozone depletion over the past decade.

• OSTI ID: 6985889
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:15; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400000* -- Chemistry
400500 -- Photochemistry
54 ENVIRONMENTAL SCIENCES
540110
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION KINETICS
CHEMISTRY
CHLORINE
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
HALOGENS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
MEASURING INSTRUMENTS
MEASURING METHODS
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL DATA
OZONE
REACTION KINETICS