Preprints
https://doi.org/10.5194/acp-2021-1011
https://doi.org/10.5194/acp-2021-1011

  13 Dec 2021

13 Dec 2021

Review status: this preprint is currently under review for the journal ACP.

An experimental study of the reactivity of terpinolene and β-caryophyllene with the nitrate radical

Axel Fouqueau1,2, Manuela Cirtog1, Mathieu Cazaunau1, Edouard Pangui1, Jean-François Doussin1, and Bénédicte Picquet-Varrault1 Axel Fouqueau et al.
  • 1Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR 7583, CNRS, Univ. Paris Est Creteil and Université de Paris, CNRS, LISA, F-94010 Créteil, France
  • 2Laboratoire national de métrologie et d’essais (LNE), 75015 Paris, France

Abstract. Biogenic volatile organic compounds (BVOCs) are subject to an intense emission by forests and crops into the atmosphere. They can rapidly react with the nitrate radical (NO3) during nighttime to form number of functionalized products. Among them, organic nitrates (ON) have been shown to behave as reservoirs of reactive nitrogen and consequently influence the ozone budget and secondary organic aerosols (SOA) which are known to have a direct and indirect effect on the radiative balance, and thus on climate.

Nevertheless, BVOCs + NO3 reactions remain poorly understood. Thus, the primary purpose of the follow-up study is to furnish new kinetic and mechanistic data for one monoterpenes (C10H16), terpinolene, and one sesquiterpene (C15H24), β-caryophyllene, using simulation chamber experiments. These two compounds have been chosen in order to fill the lack of experimental data. Rate constants have been measured using both relative and absolute methods. They have been measured to be (5.5 ± 3.8) × 10−11 and (1.7 ± 1.4) × 10−11 cm3 molecule−1 s−1 for terpinolene and β-caryophyllene respectively. Mechanistic studies have also been conducted in order to identify and quantify the main reaction products. Total organic nitrates and SOA yields have been determined. Both terpenes appear to be major ON precursors both in gas and particle phase with formation yields of 69 % for terpinolene and 79 % for β-caryophyllene respectively. They also are major SOA precursor, with maximum SOA yields of around 60 % for both of the compounds. In order to support these observations, chemical analyses of the gas phase products were performed at the molecular scale using PTR-TOF-MS and FTIR. Detected products allowed proposing chemical mechanisms and providing explanations through peroxy and alkoxy reaction pathways.

Axel Fouqueau et al.

Status: open (until 07 Feb 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-1011', Anonymous Referee #1, 08 Jan 2022 reply

Axel Fouqueau et al.

Data sets

Database of Atmospheric Simulation Chamber Studies Fouqueau, A., Cirtog, M., Cazaunau, M., Pangui, E., Doussin, J.-F., and Picquet-Varrault, B. https://data.eurochamp.org/data-access/chamber-experiments/

Axel Fouqueau et al.

Viewed

Total article views: 298 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
224 69 5 298 21 2 6
  • HTML: 224
  • PDF: 69
  • XML: 5
  • Total: 298
  • Supplement: 21
  • BibTeX: 2
  • EndNote: 6
Views and downloads (calculated since 13 Dec 2021)
Cumulative views and downloads (calculated since 13 Dec 2021)

Viewed (geographical distribution)

Total article views: 290 (including HTML, PDF, and XML) Thereof 290 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 18 Jan 2022
Download
Short summary
Biogenic volatile organic compounds are subject to high emission by forests and crops and react with the nitrate radical during nighttime to form functionalized products. The purpose of this study is to furnish kinetic and mechanistic data for terpinolene, and β-caryophyllene, using simulation chamber experiments. Rate constants have been measured using both relative and absolute methods and mechanistic studies have been conducted in order to identify and quantify the main reaction products.
Altmetrics