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A Shock Tube Study of the Reactions of H Atoms with COS, CS 2 , and H 2 S
Author(s) -
Woiki Dirk,
Roth Paul
Publication year - 1996
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199600039
Subject(s) - chemistry , ethyl iodide , iodide , methyl iodide , shock tube , analytical chemistry (journal) , resonance (particle physics) , thermal decomposition , spectroscopy , atom (system on chip) , absorption spectroscopy , bar (unit) , shock wave , atomic physics , medicinal chemistry , inorganic chemistry , thermodynamics , organic chemistry , physics , quantum mechanics , computer science , embedded system , meteorology
Reactions of H atoms with COS, CS 2 , and H 2 S were studied behind reflected shock waves at temperatures between 1170 K and 1830 K and pressures around 1.0 bar by applying atomic resonance absorption spectroscopy (ARAS) for time‐resolved measurements of H atoms at L α . The thermal decomposition of a few ppm ethyl iodide (C 2 H 5 I) was used as a H‐atom source. In the presence of a large excess of the molecular reactant COS, CS 2 , or H 2 S, a consumption of H was observed which follows a pseudo first‐order rate law. Rate coefficients for the reactions:were determined to be: k 1 = 2.4 × 10 14 exp(–3415 K/ T ) cm 3 mol −1 s −1 k 2 = 1.4 × 10 15 exp(–9250 K/ T ) cm 3 mol −1 s −1 k 3 = 2.5 × 10 14 exp(–2890 K/ T ) cm 3 mol −1 s −1