Modeling Secondary Emissions from Indoor Chemical Reactions Initiated by Ozone and Hydroxyl Radicals

Zhenlei Liu, Jialei Shen, Beverly Guo, Jianshun Zhang

Research output: Contribution to conferencePaperpeer-review

Abstract

Volatile organic compounds (VOCs) can be oxidized by ozone (O3) and hydroxyl radicals (OH•) under a series of reactions to produce secondary emissions indoors in addition to primary emissions. A mathematical model that accounts for ventilation, surface adsorption, oxidant generation, ozone and hydroxyl radicals-initiated chemical reactions was developed for evaluating the pollution loads and concentrations in a ventilated space. The model focused on major chemical reactions that were responsible for stable products from secondary emissions as detected in full-scale chamber experiments. The experiments were simulating a realistic ventilated room and how a source of O3 and OH• would affect the concentrations of VOCs. The modeled results were in line with the experimental results. Alpha-pinene and heptanal were selected to illustrate the model prediction results as an example given their relatively high reaction rates with O3 and OH•. Limitations of the model and the needs for further development were also identified.

Original languageEnglish (US)
StatePublished - 2022
Externally publishedYes
Event17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022 - Kuopio, Finland
Duration: Jun 12 2022Jun 16 2022

Conference

Conference17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022
Country/TerritoryFinland
CityKuopio
Period6/12/226/16/22

Keywords

  • Indoor air quality
  • Indoor chemistry model
  • O3-initated chemistry
  • Secondary emission

ASJC Scopus subject areas

  • Pollution

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