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Rate constant of OH + OCS reaction over the temperature range 255–483 K

✍ Scribed by Bing-Ming Cheng; Yuan-Pern Lee

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
575 KB
Volume
18
Category
Article
ISSN
0538-8066

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✦ Synopsis

The rate constant of the reaction between OH and OCS in helium over the temperature range 255-483 K has been determined using the discharge flow-resonance fluorescence technique. The OCS has been carefully purified to avoid interference from HgS and CO impurities. An FTIR with a multireflection cell was used to determine the impurity concent,rations and the purified sample was found to contain less than 0.005% o f H,S. At 300 K, the rate constant was determined to be (2.0 +-Although the rate constants showed slight positive deviation a t lower temperatures. thev can be satisfactorily fitted by the Arrhenius equation, k = 1.13 x exp(-1200/T) cm:! molecule-' s-'. No pressiire dependence was observed at all temperatures, nor was 0 2 enhancement observed under our experimental conditions.

x cm3 molecule-' s

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