Reactive uptake coefficients for multiphase reactions determined by a dynamic chamber system | CU Experts

Abstract. Dynamic flow-through chambers are frequently used to measure gas exchange rates between the atmosphere and biosphere on the Earth’s surface such as vegetation and soils. Here, we explore the performance of a dynamic chamber system in determining the uptake coefficient γ of exemplary gases (O3 and SO2) on bulk solid-phase samples. After characterization of the dynamic chamber system, the derived γ is compared with that determined from a coated-wall flow tube system. Our results show that the dynamic chamber system and the flow tube method show a good agreement for γ in the range of 10-8 to 10-3. The dynamic chamber technique can be used for liquid samples and real atmospheric aerosol samples without complicated coating procedures, which complements the existing techniques in atmospheric kinetic studies.;

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