Abstract
Ozone concentrations were monitored upstream and downstream of used filter samples following 24hours of ventilation with ozone- filtered air. The ozone concentration in the air upstream of the filters was maintained at ~75 ppb while the concentration downstream of the filters was initially between ~ 35 and 55 ppb and slowly increased over time. Within an hour the ozone concentration downstream of the filter had increased to ~ 70 ppb. In contrast, no change in ozone removal efficiency over time was observed for a new filter. The used filter samples were then placed for 24 hours in ambient air (ozone concentration <5 ppb); ambient air at an elevated temperature (100°C); or nitrogen. When subsequently placed in the air stream containing 75 ppb of ozone partial regeneration of the filter’s ozone removal capabilities was observed. Regeneration was greatest for the sample that had sat at an elevated temperature. The process or processes responsible for regeneration remain to be determined
Original language | English |
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Title of host publication | Proceedings of Indoor Climate of Buildings ´04 Health, Comfort and Safety by operation of HVAC-R Systems |
Editors | Dusan Petras, Maria Feketeova, Jana Sabikova |
Volume | 1 |
Place of Publication | Bratislava, Slovakia |
Publisher | SSTP - Slovak Society of Environmental Technology, 2004 |
Publication date | 2004 |
Pages | 419-424 |
Publication status | Published - 2004 |
Event | Indoor Climate of Buildings ´04,Strbske Pleso, November 21-24,2004 - Strebske Pleso, Slovakia Duration: 1 Jan 2004 → … |
Conference
Conference | Indoor Climate of Buildings ´04,Strbske Pleso, November 21-24,2004 |
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City | Strebske Pleso, Slovakia |
Period | 01/01/2004 → … |