Flash photolysis/tunable diode laser absorption spectroscopy studies of HCl as a product of the reactions: Cl + C{sub 2}H{sub 6} and Cl + CH{sub 3}CHO
- Univ. of Colorado, Boulder, CO (United States). Dept. of Chemistry and Biochemistry
- National Center for Atmospheric Research, Boulder, CO (United States). Atmospheric Chemistry Div.
A time-resolved flash photolysis/tunable diode laser absorption spectroscopy (FP/TDLAS) system has been constructed to study reaction products of gas-phase chemical reactions. The use of FP to initiate the chemistry results in essentially a wall-less reactor due to the time of reaction being much shorter than the time of diffusion. The use of TDLAS allows the time-resolved detection of HCl by monitoring individual lines in the rovibrational spectrum. While the system is being developed for study of the products of radical-radical reactions, preliminary studies involved detection of HCl from reaction of Cl-atoms with organic species. The reaction CL + C{sub 2}H{sub 6} {yields} HCl + C{sub 2}H{sub 5} was studied to characterize the system and determine the detection limit for HCl. The rate coefficient, k{sub 1}, was determined to be (5.9 {+-} 0.4) {times} 10{sup {minus}11} cm{sup 3}/molec.s in agreement with the recommended values. HCl (v = 0) and HCl (v = 1) were simultaneously measured as products of the reaction Cl + CH{sub 3}CHO {yields} HCl + CH{sub 3}CO at 2906.247 cm{sup {minus}1} and 2906.337 cm{sup {minus}1} respectively. It was determined for this reaction that k{sub 2} = (7.5 {+-} 0.6) {times} 10{sup {minus}11} cm{sup 3}/molec.s.
- Sponsoring Organization:
- National Aeronautics and Space Administration, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- OSTI ID:
- 500938
- Report Number(s):
- CONF-960848--; ISBN 0-8194-2222-3
- Country of Publication:
- United States
- Language:
- English
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