氟乙酸乙酯和氟乙酸丁酯氧化：产品产量、机制和环境影响

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment Pub Date : 2025-09-09 DOI:10.1016/j.atmosenv.2025.121532

Pedro L. Lugo , Tamara B. Benzaquén , Mariano A. Teruel , María B. Blanco

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引用次数: 0

摘要

在无NOx条件下，研究了●OH自由基与氟乙酸乙酯（EFA）和氟乙酸丁酯（BFA）气相反应的产物。实验在1080 L石英玻璃腔中进行，在（298±2）K和（760±10）torr的合成空气中使用长路径原位FTIR光谱来监测反应物和产物。反应产物为氟乙酸（CH2FC(O)OH）、甲酰基氟（HC(O)F）和甲醛（HC(O)H）。EFA + OH反应的CH2FC(O)OH的摩尔产率为（52.4±0.5）%，HC(O)H的摩尔产率为（32.3±0.3）%，HC(O)F的摩尔产率为（86.1±0.8）%；OH与BFA反应的CH2FC(O)OH的摩尔产率为（28.0±0.1）%，HC(O)F的摩尔产率为（11.0±0.3）%，HC(O)H的摩尔产率为<； 5%。采用光fenton法降解FES氧化产物CF3C(O)OH （TFA）、CF2HC(O)OH （DFA）和CH2FC(O)O （MFA）。讨论了所研究反应的大气意义。

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Ethyl fluoroacetate and butyl fluoroacetate oxidation: Products yields, mechanisms and environmental implications

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Ethyl fluoroacetate and butyl fluoroacetate oxidation: Products yields, mechanisms and environmental implications

Product studies were developed for the gas-phase reactions of ^●OH radicals with ethyl fluoroacetate (EFA) and butyl fluoroacetate (BFA) at NOx free conditions. The experiments were performed in a 1080 L quartz-glass chamber in synthetic air at (298 ± 2) K and (760 ± 10) torr using long path in situ FTIR spectroscopy to monitor the reactants and products. Fluoroacetic acid (CH₂FC(O)OH), formyl fluoride (HC(O)F) and formaldehyde (HC(O)H) were positively identified as reaction products. The following molar yields determined were: (52.4 ± 0.5) % of CH₂FC(O)OH, (32.3 ± 0.3) % of HC(O)H and (86.1 ± 0.8) % of HC(O)F for EFA + OH reaction, while product yields of (28.0 ± 0.1) % of CH₂FC(O)OH, (11.0 ± 0.3) % of HC(O)F and <5 % of HC(O)H were obtained for the reaction of OH with BFA, respectively.

Photo-Fenton process was used to degrade a series of fluoracetic acids, CF₃C(O)OH (TFA), CF₂HC(O)OH (DFA) and CH₂FC(O)O (MFA), obtained as products of FES oxidation. Atmospheric implications of the reactions studied are discussed.

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来源期刊

Atmospheric Environment 环境科学-环境科学

CiteScore

9.40

自引率

8.00%

发文量

458

审稿时长

53 days

期刊介绍： Atmospheric Environment has an open access mirror journal Atmospheric Environment: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Atmospheric Environment is the international journal for scientists in different disciplines related to atmospheric composition and its impacts. The journal publishes scientific articles with atmospheric relevance of emissions and depositions of gaseous and particulate compounds, chemical processes and physical effects in the atmosphere, as well as impacts of the changing atmospheric composition on human health, air quality, climate change, and ecosystems.