| View Larger Image | Ozone removal by diesel particulate matter [An article from: Atmospheric Environment] | Digitalby T.A. Metts (Author), S.A. Batterman (Author), G.I. Fernandes (Author), Kallio (Author)
| List Price: | $10.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Publication Date: | June 01, 2005 |
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Product Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: The most significant removal mechanisms for tropospheric ozone (O"3) include dry deposition, photolysis, and photochemical reactions. This study examines another mechanism potentially important in urban areas: sorption and removal on diesel particulate matter (DPM). Tests were performed to determine O"3 breakthrough and the amount of O"3 removed by the DPM generated by a heavy-duty diesel engine. Teflon filters loaded with 0.7-1.8mg of DPM were exposed to a test atmosphere of humidified and ozonated air designed to represent realistic ambient air conditions. In addition, soot samples with the organic fraction removed were tested to determine whether the organic or elemental fraction contributed to O"3 removal. For comparison, activated carbon (AC) samples were also tested. The DPM-loaded filters removed 5.6+/-1.8wt% of O"3. Considerably more ozone, 31+/-4wt %, was removed by the DPM after removal of its soluble organic fraction. Removal capacities of DPM were small relative to AC, which removed >38+/-3wt% of O"3. Of the Lagergren pseudo-first-order, pseudo-second-order, Elovich, and Ritchie chemisorption models tested, the Ritchie model provided the best fit to the breakthrough data. Preliminary estimates drawn from laboratory results suggest that diesel soot present at typical urban levels will remove only a small portion of O"3 from urban or tropospheric air. In air cleaning applications, DPM-loaded filters are also expected to remove only a small portion of indoor O"3. |
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