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DOI10.5194/acp-20-3669-2020
Technical note: Determination of binary gas-phase diffusion coefficients of unstable and adsorbing atmospheric trace gases at low temperature - Arrested flow and twin tube method
Langenberg S.; Carstens T.; Hupperich D.; Schweighoefer S.; Schurath U.
发表日期2020
ISSN16807316
起始页码3669
结束页码3682
卷号20期号:6
英文摘要Gas-phase diffusion is the first step for all heterogeneous reactions under atmospheric conditions. Knowledge of binary diffusion coefficients is important for the interpretation of laboratory studies regarding heterogeneous trace gas uptake and reactions. Only for stable, nonreactive and nonpolar gases do well-established models for the estimation of diffusion coefficients from viscosity data exist. Therefore, we have used two complementary methods for the measurement of binary diffusion coefficients in the temperature range of 200 to 300 K: the arrested flow method is best suited for unstable gases, and the twin tube method is best suited for stable but adsorbing trace gases. Both methods were validated by the measurement of the diffusion coefficients of methane and ethane in helium and air as well as nitric oxide in helium. Using the arrested flow method the diffusion coefficients of ozone in air, dinitrogen pentoxide and chlorine nitrate in helium, and nitrogen were measured. The twin tube method was used for the measurement of the diffusion coefficient of nitrogen dioxide and dinitrogen tetroxide in helium and nitrogen. © 2020 Copernicus GmbH. All rights reserved.
关键词adsorptionatmospheric chemistryheterogeneitylow temperaturemodel validationnitric acidnitrogen dioxidereaction kineticstrace gas
语种英语
来源机构Atmospheric Chemistry and Physics
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/132140
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GB/T 7714
Langenberg S.,Carstens T.,Hupperich D.,et al. Technical note: Determination of binary gas-phase diffusion coefficients of unstable and adsorbing atmospheric trace gases at low temperature - Arrested flow and twin tube method[J]. Atmospheric Chemistry and Physics,2020,20(6).
APA Langenberg S.,Carstens T.,Hupperich D.,Schweighoefer S.,&Schurath U..(2020).Technical note: Determination of binary gas-phase diffusion coefficients of unstable and adsorbing atmospheric trace gases at low temperature - Arrested flow and twin tube method.,20(6).
MLA Langenberg S.,et al."Technical note: Determination of binary gas-phase diffusion coefficients of unstable and adsorbing atmospheric trace gases at low temperature - Arrested flow and twin tube method".20.6(2020).
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