Laboratory Measurement of Secondary Pollutant Yields from Ozone Reaction with HVAC Filters

Laboratory Measurement of Secondary Pollutant Yields from Ozone Reaction with HVAC Filters

TitleLaboratory Measurement of Secondary Pollutant Yields from Ozone Reaction with HVAC Filters
Publication TypeConference Proceedings
Year of Publication2009
AuthorsHugo Destaillats, Wenhao Chen, Michael G Apte, Nuan Li, Michael Spears, Jérémie Almosni, Jianshun Zheng, William J Fisk
Conference NameProceedings of the Healthy Buildings 2009 Conference
Date Published09/2009
Conference LocationSyracuse, NY
Keywordsbuilding-related symptoms, hvac filter, ozone, ptr-ms, secondary pollutants
Abstract

We used Proton Transfer Reaction – Mass Spectrometry (PTR-MS) and conventional sampling methods to monitor and identify trace level organic pollutants formed in heterogeneous reactions between ozone and HVAC filters in real time. Experiments were carried out using a bench-scale flow tube reactor operating with dry air and humidified air (50% RH), at realistically high ozone concentrations (150 ppbv). We explored different filter media (i.e., fiberglass and cotton/polyester blends) and different particle loadings (i.e., clean filter and filters loaded with particles for 3 months at the Lawrence Berkeley National Laboratory and the Port of Oakland, CA). Detailed emission dynamics of very low levels of certain organic pollutants from filter media upon ozone exposure in the presence of moisture have been obtained and analyzed.

LBNL Report Number

LBNL-5034E