Ming-Wei Lin1, Ching-Song Jwo1, Hsin-Jr Ho1, Liang-Yü Chen 2

  • 1 Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 106, Taiwan
  • 2 Department of Biotechnology, Ming Chuan University, Taoyuan 33343, Taiwan

Received: October 6, 2016
Revised: December 3, 2016
Accepted: December 5, 2016
Download Citation: ||https://doi.org/10.4209/aaqr.2016.09.0397  

  • Download: PDF


Cite this article:
Lin, M.W., Jwo, C.S., Ho, H.J. and Chen, L.Y. (2017). Using Box Modeling to Determine Photodegradation Coefficients Describing the Removal of Gaseous Formaldehyde from Indoor Air. Aerosol Air Qual. Res. 17: 330-339. https://doi.org/10.4209/aaqr.2016.09.0397


HIGHLIGHTS

  • Box modeling was used to simulate the removal of gaseous formaldehyde indoors.
  • Degradation of HCHO from air is a zero-order heterogeneous catalytic reaction.
  • UV irradiation determines the ability of indoor air handling units to remove VOCs.

 

ABSTRACT


Human exposure to volatile organic compounds (VOCs) indoors is receiving increasing attention. Formaldehyde (HCHO) is the most common VOC emitted from household materials and is associated with many health risks, including sick building syndrome. In this study, a simple box model was developed and applied to help understand the fate and degradation mechanisms of HCHO in the indoor environment. The model was validated using observations from an air handling system under different conditions. A UV/TiO2 filter reactor was installed in a closed box with the air conditioning unit. Three parameters, temperature, relative humidity, and circulation wind speed, were investigated for their effects on the performance of the air handling system. Our results show that the operation mode of the air handling system has a greater effect on the removal of HCHO than any of the air conditioning parameters. From a kinetic perspective, the removal of gaseous HCHO from a constant-volume box clearly represents a zero-order reaction. After UV irradiation with a TiO2 filter for 2 hours, the removal efficiency of gaseous HCHO increases to approximately 90%. Contributions to the removal of gaseous HCHO from natural dissipation, photodegradation, and photocatalytic oxidation decomposition are 12%, 30%, and 58%, respectively. Our results have implications for reducing indoor air pollution and reducing stress on air conditioning systems. Meeting these goals is beneficial for human health and energy conservation in modern society.


Keywords: Heterogeneous catalysis; Titanium dioxide; Air cleaning; Reaction kinetics


Share this article with your colleagues 

 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

7.3
2022CiteScore
 
 
77st percentile
Powered by
Scopus
 
   SCImago Journal & Country Rank

2022 Impact Factor: 4.0
5-Year Impact Factor: 3.4

Call for Papers for the special issue on: "Carbonaceous Aerosols in the Atmosphere"

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.