Preprints
https://doi.org/10.5194/acp-2022-711
https://doi.org/10.5194/acp-2022-711
 
02 Nov 2022
02 Nov 2022
Status: this preprint is currently under review for the journal ACP.

Measurement report: Underestimated reactive organic gases from residential combustion: insights from a near-complete speciation

Yaqin Gao1, Hongli Wang1, Lingling Yuan1, Shengao Jing1, Bin Yuan2, Guofeng Shen3, Liang Zhu4,5, Abigail Koss5, Yingjie Li1, Qian Wang1, Dan Dan Huang1, Shuhui Zhu1, Shikang Tao1, Shengrong Lou1, and Cheng Huang1 Yaqin Gao et al.
  • 1State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai 200233, China
  • 2Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
  • 3Laboratory of Earth Surface Processes, College of Urban and Environmental Science, Peking University, Beijing 100871, China
  • 4Tofwerk China, Nanjing 210000, China
  • 5Tofwerk AG, Thun 3645, Switzerland

Abstract. Reactive organic gases (ROGs), as important precursors of secondary pollutants, are not well resolved as the chemical complexity challenged its quantification in many studies. Here, a near-complete speciation of ROGs with 125 species was developed and applied to evaluate their emission characteristics from residential solid fuel combustion. ROGs identified by the present method accounted for ~90 % of the “total” as the sum of species by Gas Chromatography equipped with a Mass Spectrometer and a Flame Ionization Detector (GC-MS/FID) and H3O+/NO+ Proton Transfer Reaction Time-of-Flight Mass Spectrometer (Vocus PTR-ToF-MS). The study further revealed that with 55 species, mainly oxygenated species, higher hydrocarbons with > 8 carbon atoms, and nitrogen-containing ones, previously un- and under-characterized, ROG emissions from residential coal and biomass combustion were underestimated by 44.3 % ± 11.8 % and 22.7 % ± 3.9 %, respectively, which further amplified the underestimation of secondary organic aerosols formation potential (SOAP) as high as 70.3 % ± 1.6 % and 89.2 % ± 1.0 %, respectively. The OH reactivity (OHR) of ROG emissions was also undervalued significantly. The study highlighted the importance of acquiring completely speciated measurement of ROGs from residential emissions, as well as other processes.

Yaqin Gao et al.

Status: open (until 14 Dec 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-711', Anonymous Referee #1, 21 Nov 2022 reply
  • RC2: 'Comment on acp-2022-711', Anonymous Referee #2, 22 Nov 2022 reply

Yaqin Gao et al.

Data sets

Data for speciation of ROG emissions from residential combustion Hongli Wang https://data.mendeley.com/datasets/z78zz7mv7h/1

Yaqin Gao et al.

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Short summary
A near-complete speciation of Reactive organic gases (ROGs) emitted from residential combustion was developed to get more insights into their atmospheric effects. Oxygenated species, higher hydrocarbons and nitrogen-containing ones played larger roles in the emissions of residential combustion comparing with the common hydrocarbons. Based on the near-complete speciation, ROG emissions from residential combustion were largely underestimated, leading to more underestimation of their OHR and SOAP.
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