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Reaction Mechanism of Multistage N2O5 Uptake on Methane Flame Soot

  • CHEMICAL PHYSICS OF ATMOSPHERIC PHENOMENA
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Abstract

The uptake of N2O5 on a methane soot coating at T = 255 and 298 K in the range of [N2O5] = 1.3 × 1012–3.3 × 1013 cm−3 is studied using a flow reactor with a movable insert and mass spectrometric detection. A series of dependences of the uptake coefficient on the exposure time of the coating to the reagent gas at the given concentrations are obtained. A multistage uptake mechanism is proposed in the framework of the Langmuir conception of adsorption, which explains the complex time dependence of the uptake coefficient and the shape of its dependence on the concentration. Based on the proposed mechanism, a number of elementary parameters are obtained from an analytical description of the experimental data, which make it possible to model the uptake coefficient at arbitrary N2O5 concentrations and temperatures.

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Funding

This study was supported by state task FFZE-2022-0008 (registration number 1021051302551-2-1.3.1; 1.4.7; 1.6.19).

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Authors and Affiliations

  1. Chernogolovka Branch, Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow region, Russia

    V. V. Zelenov & E. V. Aparina

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  1. V. V. Zelenov
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  2. E. V. Aparina
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Correspondence to V. V. Zelenov.

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Zelenov, V.V., Aparina, E.V. Reaction Mechanism of Multistage N2O5 Uptake on Methane Flame Soot. Russ. J. Phys. Chem. B 16, 1182–1190 (2022). https://doi.org/10.1134/S1990793122060239

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