Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions
Formaldehyde (HCHO) and nitrogen dioxide (NO<sub>2</sub>) often co-exist in urban environments at levels that are hazardous to health. There is a demand for a solution to the problem of their combined removal. In this paper, we investigate catalysts, adsorbents and composites for their r...
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MDPI AG
2020-09-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/9/1040 |
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| author | Hugo S. Russell James Bonomaully Rossana Bossi Magdalena E. G. Hofmann Hasse C. Knap Jakob B. Pernov Marten in ‘t Veld Matthew S. Johnson |
| author_facet | Hugo S. Russell James Bonomaully Rossana Bossi Magdalena E. G. Hofmann Hasse C. Knap Jakob B. Pernov Marten in ‘t Veld Matthew S. Johnson |
| author_sort | Hugo S. Russell |
| collection | DOAJ |
| description | Formaldehyde (HCHO) and nitrogen dioxide (NO<sub>2</sub>) often co-exist in urban environments at levels that are hazardous to health. There is a demand for a solution to the problem of their combined removal. In this paper, we investigate catalysts, adsorbents and composites for their removal efficiency (RE) toward HCHO and NO<sub>2</sub>, in the context of creating a pollution control device (PCD). Proton-transfer-reaction mass spectrometry and cavity ring-down spectrometry are used to measure HCHO, and chemiluminescence and absorbance-based monitors for NO<sub>2</sub>. Commercially available and lab-synthesized materials are tested under relevant conditions. None of the commercial adsorbents are effective for HCHO removal, whereas two metal oxide-based catalysts are highly effective, with REs of 81 ± 4% and 82 ± 1%, an improvement on previous materials tested under similar conditions. The best performing material for combined removal is a novel composite consisting of a noble metal catalyst supported on a metal oxide, combined with a treated active carbon adsorbent. The composite is theorized to work synergistically to physisorb and oxidize HCHO and chemisorb NO<sub>2</sub>. It has an HCHO RE of 72 ± 2% and an NO<sub>2</sub> RE of 96 ± 2%. This material has potential as the active component in PCDs used to reduce personal pollution exposure. |
| first_indexed | 2024-03-10T16:26:13Z |
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| id | doaj.art-2d2044e8091b4f52a144d9a41d90e2ef |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T16:26:13Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-2d2044e8091b4f52a144d9a41d90e2ef2023-11-20T13:13:06ZengMDPI AGCatalysts2073-43442020-09-01109104010.3390/catal10091040Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient ConditionsHugo S. Russell0James Bonomaully1Rossana Bossi2Magdalena E. G. Hofmann3Hasse C. Knap4Jakob B. Pernov5Marten in ‘t Veld6Matthew S. Johnson7Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, DenmarkAirLabs Denmark, Nannasgade 28, DK-2200 København N, DenmarkDepartment of Environmental Science, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, DenmarkPicarro B.V., Willemsplein 2, NL-5211 AK ’s-Hertogenbosch, The NetherlandsAirLabs Denmark, Nannasgade 28, DK-2200 København N, DenmarkDepartment of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, DenmarkDepartment of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, DenmarkDepartment of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, DenmarkFormaldehyde (HCHO) and nitrogen dioxide (NO<sub>2</sub>) often co-exist in urban environments at levels that are hazardous to health. There is a demand for a solution to the problem of their combined removal. In this paper, we investigate catalysts, adsorbents and composites for their removal efficiency (RE) toward HCHO and NO<sub>2</sub>, in the context of creating a pollution control device (PCD). Proton-transfer-reaction mass spectrometry and cavity ring-down spectrometry are used to measure HCHO, and chemiluminescence and absorbance-based monitors for NO<sub>2</sub>. Commercially available and lab-synthesized materials are tested under relevant conditions. None of the commercial adsorbents are effective for HCHO removal, whereas two metal oxide-based catalysts are highly effective, with REs of 81 ± 4% and 82 ± 1%, an improvement on previous materials tested under similar conditions. The best performing material for combined removal is a novel composite consisting of a noble metal catalyst supported on a metal oxide, combined with a treated active carbon adsorbent. The composite is theorized to work synergistically to physisorb and oxidize HCHO and chemisorb NO<sub>2</sub>. It has an HCHO RE of 72 ± 2% and an NO<sub>2</sub> RE of 96 ± 2%. This material has potential as the active component in PCDs used to reduce personal pollution exposure.https://www.mdpi.com/2073-4344/10/9/1040pollution controlNOxformaldehydeactivated carboncomposite filtercatalytic removal |
| spellingShingle | Hugo S. Russell James Bonomaully Rossana Bossi Magdalena E. G. Hofmann Hasse C. Knap Jakob B. Pernov Marten in ‘t Veld Matthew S. Johnson Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions Catalysts pollution control NOx formaldehyde activated carbon composite filter catalytic removal |
| title | Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions |
| title_full | Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions |
| title_fullStr | Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions |
| title_full_unstemmed | Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions |
| title_short | Novel Materials for Combined Nitrogen Dioxide and Formaldehyde Pollution Control under Ambient Conditions |
| title_sort | novel materials for combined nitrogen dioxide and formaldehyde pollution control under ambient conditions |
| topic | pollution control NOx formaldehyde activated carbon composite filter catalytic removal |
| url | https://www.mdpi.com/2073-4344/10/9/1040 |
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