How rapidly does the SH radical react with N{sub 2}O?

Journal Article · Thu Aug 26 04:00:00 EDT 1999 · Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory

DOI:https://doi.org/10.1021/jp9911853· OSTI ID:20000063

Herndon, S C; Froyd, K D; Lovejoy, E R; Ravishankara, A R

The reaction of SH radical with N{sub 2}O was investigated by using two complementary experimental methods: (1) a pulsed photolysis apparatus where SH was detected via laser-induced fluorescence and (2) a discharge flow tube where SH was detected via chemical ionization mass spectrometry. The rate coefficient for this reaction, {kappa}{sub 1}, was found to be less than 5 x 10{sup {minus}16} cm{sup 3} molecule{sup {minus}1} s{sup {minus}1} at 298 K, in contrast to the large value reported in the literature. Secondary reactions were deduced to be unimportant in the system. Some possible reasons for the previously reported high value are presented. The low value of {kappa}{sub 1} makes the oxidation of SH by N{sub 2}O and removal of N{sub 2}O by SH unimportant in the earth's atmosphere.

• Research Organization: National Oceanic and Atmospheric Administration, Boulder, CO (US)
• OSTI ID: 20000063
• Journal Information: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Journal Name: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory Journal Issue: 34 Vol. 103; ISSN 1089-5639; ISSN JPCAFH
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION KINETICS
HYDROGEN SULFIDES
NITROUS OXIDE
PHOTOLYSIS
RADICALS