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DOI | 10.5194/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 |
ISSN | 16807316 |
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 |
推荐引用方式 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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