Reactor characterization and primary application of a state of art dual-reactor chamber in the investigation of atmospheric photochemical processes

Luo, Hao; Li, Guiying; Chen, Jiangyao; Wang, Yujie; An, Taicheng

doi:10.1016/j.jes.2020.05.021

Cited by 15 publications

(4 citation statements)

References 38 publications

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“…All the ozonolysis experiments were performed in a smog chamber. Since the details of the smog chamber has been reported in other articles (Luo et al, 2021;Luo et al, 2020), we just make a brief description herein. Two extremely same pillowshaped Teflon reactors (2.5 m × 2.0 m) mounted inside the smog chamber, and each reactor is surrounded by 3 high efficiency ionizing blower (varied from 0 to a maximum of 2000 r/min), in order to mix the air inside the reactors evenly.…”

Section: Ozonolysis Experimentsmentioning

confidence: 99%

“…Amines can also be directly oxidized by major atmospheric oxidants, such as OH, O3 and NO3, in gas phase or in condensed phase (Ge et al, 2011;Qiu and Zhang, 2013;Tang et al, 2013). Recently, Criegee intermediates reacting with amines has been investigated in some studies, however, the actual effect of Criegee intermediates on oxidizing amines is by now unclear (Chhantyal-Pun et al, 2019b;Kumar and Francisco, 2019;Ma et al, 2020;Mull et al, 2020). 1,2,4-Trioxolanes, known as secondary ozonides (SOZs), are formed by the intramolecular reactions of the Criegee moieties with the carbonyl endogroups, as well as bimolecular reaction of Criegee intermediates with carbonyl species such as formaldehyde and acetone (Chhantyal-Pun et al, 2020;Chhantyal-Pun et al, 2019a;Cornwell et al, 2021;Wang et al, 2022).…”

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confidence: 99%

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A Possible Unaccounted Source of Nitrogen-Containing Compounds Formation in Aerosols: Amines Reacting with Secondary Ozonides

Qiu,

Shen,

Chen

et al. 2023

Preprint

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Abstract. Nitrogen (N)-containing compounds have a significant impact on the optical and toxicological properties of aerosols. 1,2,4-Trioxolanes, known as secondary ozonides (SOZs), key products from the ozonolysis of biogenic terpenoids, are readily taken up into atmospheric aerosols and act as oxidants, potentially interacting with amines in the atmosphere. In the present work, we carefully investigated the component of the particles produced by the ozonolysis of β-caryophyllene (β-C) in the presence of ethylamine (EA), methylamine (MA), dimethylamine (DMA) or ammonia. The mass spectrometric results show that SOZ is the dominant product from the ozonolysis of β-C. It readily reacts with EA and MA but has inert reactivities toward DMA and ammonia. Similar experimental results were achieved with α-humulene (α-H), an isomer of β-C, was used in place of β-C. Additionally, D2O and H218O solvents were used for the characterization of products. The results revealed an intriguing phenomenon that the products from β-C SOZ and α-H SOZ reacting with the same amine (EA or MA) possessed different functional groups, despite the fact that they are isomerized species with the identical chemical structure (1,2,4-trioxolane). That indicates the chemical conformation of SOZs has a strong influence on how they react with amines. For the first time, SOZs derived from β-C and α-H reacting with amines is reported in this study, that may represent a hitherto unrecognized source of N-containing compounds production in atmospheric aerosols.

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Section: Ozonolysis Experimentsmentioning

confidence: 99%

mentioning

confidence: 99%

A Possible Unaccounted Source of Nitrogen-Containing Compounds Formation in Aerosols: Amines Reacting with Secondary Ozonides

Qiu,

Shen,

Chen

et al. 2023

Preprint

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“…All experiments were conducted in GDUT-DRC dual-reactor chamber with two 2 m 3 pillow-shaped reactors and the detail description of the reactor was reported in our early work (Luo et al, 2020b). The experimental relative humidity and temperature was set as < 5% and around 303 ± 1 K, respectively.…”

Section: Photochemical Oxidation Experimentsmentioning

confidence: 99%

“…No inorganic seed aerosol was supplied in this work. A total of 60 black lamps (40 W, F40BL, GE, USA) were equipped to provide UV light source, and the light intensity in the dual-reactor were determined to be 0.161 min -1 (left) and 0.169 min -1 (right) by using the NO2 photolysis rate constant (Luo et al, 2020b).…”

Section: Photochemical Oxidation Experimentsmentioning

confidence: 99%

Comment on acp-2021-29

2021

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Aromatic hydrocarbons (AHs) contribute significantly to ozone and secondary organic aerosol (SOA) formation in atmosphere, but formation mechanisms are still unclear. Herein, photochemical oxidation of nine AHs was investigated in chamber. Only small amount of ozone was produced from direct photochemical oxidation of AHs, while fewer AH substituent number resulted in higher concentrated ozone. Addition of NOx increased ozone and SOA production.Synergetic effect of accelerated NO2 conversion and NO reaction with AHs boosted ozone and volatile intermediate formation. Promoting AH concentration in VOC/NOx ratio further increased formation rates and concentrations of both ozone and SOA. Additionally, ozone formation was enhanced with increasing AH's substituent number but negligibly affected by their substituent position. Differently, SOA yield decreased with increased substituent number of AHs, but increased with ortho methyl group substituted AHs. Model fitting and intermediate consistently confirmed that increasing substituent number on phenyl ring inhibited generating dicarbonyl intermediates, which however were preferentially produced from oxidation of ortho methyl group substituted AHs, resulting in different changing trend of SOA yield. The restrained oligomerization by increased substituent number was another main cause for decreased SOA yield. These results are helpful to understand photochemical transformation of AHs to secondary pollutants in real atmosphere. IntroductionAs an abundant group of volatile organic compounds (VOCs), aromatic hydrocarbons (AHs) are important precursors of ozone (O3) and secondary organic aerosols (SOA) in atmospheric environment (

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Introduction to Atmospheric Simulation Chambers and Their Applications

Kiendler‐Scharr

Becker

Doussin

et al. 2023

A Practical Guide to Atmospheric Simulation Chambers

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Atmospheric simulation chambers have been deployed with various research goals for more than 80 years. In this chapter, an overview of the various applications, including emerging new applications, is given. The chapter starts with a brief historical overview of atmospheric simulation chambers. It also provides an overview of how simulation chambers complement field observations and more classical laboratory experiments. The chapter is concluded with an introduction to the different aspects requiring consideration when designing an atmospheric simulation chamber.

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Reactor characterization and primary application of a state of art dual-reactor chamber in the investigation of atmospheric photochemical processes

Cited by 15 publications

References 38 publications

A Possible Unaccounted Source of Nitrogen-Containing Compounds Formation in Aerosols: Amines Reacting with Secondary Ozonides

A Possible Unaccounted Source of Nitrogen-Containing Compounds Formation in Aerosols: Amines Reacting with Secondary Ozonides

Comment on acp-2021-29

Introduction to Atmospheric Simulation Chambers and Their Applications

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