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Low-Temperature Oxidation of Hydrogen Sulfide and Formaldehyde Pollutants in Humid Air by UV Radiation at 184.95 and 253.65 nm.
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2020-09-07 , DOI: 10.1021/acs.jpca.0c06552
Mikhail G Bryukov 1, 2 , Leonid M Vasilyak 3 , Alexander I Vasiliev 2 , Sergey V Kostyuchenko 2 , Nickolay N Kudryavtsev 4
Affiliation  

An experimental study of the oxidation of hydrogen sulfide and formaldehyde impurities in humid air by ultraviolet radiation at wavelengths of 184.95 and 253.65 nm has been carried out at a pressure of 1 atm, an initial temperature of 20 °C, a relative humidity of 90%, and a flow rate of the gas mixture of 4920 m3/h. The initial concentrations of hydrogen sulfide and formaldehyde in air ranged from 8 to 20 and from 2.9 to 7.2 mg/m3, respectively. The photochemical kinetic mechanism was proposed for a numerical simulation of the low-temperature photooxidation of hydrogen sulfide and formaldehyde pollutants as well as the formation of ozone in humid air. The mechanism consists of 7 and 4 photochemical reactions initiated by UV radiation at wavelengths of 184.95 and 253.65 nm, respectively, and 62 reversible individual chemical reactions involving 32 chemical species (radicals, atoms, and molecules). The obtained results of numerical simulation are in good agreement with experimental data.

中文翻译:

在184.95和253.65 nm处通过紫外线辐射在潮湿空气中对硫化氢和甲醛污染物进行低温氧化。

在压力为1 atm,初始温度为20°C,相对湿度为90%的情况下,通过紫外线辐射在184.95和253.65 nm波长下对湿空气中的硫化氢和甲醛杂质进行氧化的实验研究,气体混合物的流量为4920 m 3 / h。空气中硫化氢和甲醛的初始浓度为8至20和2.9至7.2 mg / m 3, 分别。提出了光化学动力学机理用于数值模拟硫化氢和甲醛污染物的低温光氧化以及在潮湿空气中形成臭氧。该机制包括分别由波长为184.95和253.65 nm的紫外线辐射引发的7和4个光化学反应,以及涉及32个化学物种(自由基,原子和分子)的62个可逆的单独化学反应。数值模拟结果与实验数据吻合良好。
更新日期:2020-10-02
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