Measurement of rate and equilibrium parameters for physicochemical processes pertaining to the atmosphere by gas chromatography
✍ Scribed by Fani Roubani-Kalantzopoulou; Valsamia Sotiropoulou; Helen Metaxa; Nicholas A. Katsanos
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 101 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1040-7685
No coin nor oath required. For personal study only.
✦ Synopsis
Laboratory kinetic experiments can be performed under conditions of concentration, temperature, pressure, humidity, and so on very close to those prevailing in the atmosphere and in the presence of heterogeneous sinks by the Ž . reversed-flow gas chromatography RF-GC technique. It is an absolute rate constant technique, but the system is neither a static nor a flow one. It is a diffusion controlled system by means of which rate constants and reaction orders with respect to time n of unimolecular and bimolecular chemical reactions of t atmospheric species with other substances can be measured. In the presence of heterogeneous sinks, the following physicochemical parameters are determined under unsteady-state conditions: the local adsorption parameter k of the analyte 1 A under study and the experimental isotherm, the desorption rate constant of A from the solid surface k , the rate constant k of a possible first-order or y1 2 pseudo-first-order surface reaction of the adsorbed analyte, and the deposition velocity V and the reaction probability ␥ of A on the heterogeneous sink. ᮊ 1998 d