Secondary effects of catalytic diesel particulate filters: copper-induced formation of PCDD/Fs.

Détails

ID Serval
serval:BIB_006CC3C29ACD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Secondary effects of catalytic diesel particulate filters: copper-induced formation of PCDD/Fs.
Périodique
Environmental science & technology
Auteur⸱e⸱s
Heeb N.V., Zennegg M., Gujer E., Honegger P., Zeyer K., Gfeller U., Wichser A., Kohler M., Schmid P., Emmenegger L., Ulrich A., Wenger D., Petermann J.L., Czerwinski J., Mosimann T., Kasper M., Mayer A.
ISSN
0013-936X
Statut éditorial
Publié
Date de publication
08/2007
Peer-reviewed
Oui
Volume
41
Numéro
16
Pages
5789-5794
Langue
anglais
Notes
Publication types: Journal Article
Résumé
Potential risks of a secondary formation of polychlorinated dibenzodioxins/furans (PCDD/Fs) were assessed for two cordierite-based, wall-through diesel particulate filters (DPFs) for which soot combustion was either catalyzed with an iron- or a copper-based fuel additive. A heavy duty diesel engine was used as test platform, applying the eight-stage ISO 8178/4 C1 cycle. DPF applications neither affected the engine performance, nor did they increase NO, NO2, CO, and CO2 emissions. The latter is a metric for fuel consumption. THC emissions decreased by about 40% when deploying DPFs. PCDD/F emissions, with a focus on tetra- to octachlorinated congeners, were compared under standard and worst case conditions (enhanced chlorine uptake). The iron-catalyzed DPF neither increased PCDD/F emissions, nor did it change the congener pattern, even when traces of chlorine became available. In case of copper, PCDD/F emissions increased by up to 3 orders of magnitude from 22 to 200 to 12 700 pg I-TEQ/L with fuels of < 2, 14, and 110 microg/g chlorine, respectively. Mainly lower chlorinated DD/Fs were formed. Based on these substantial effects on PCDD/F emissions, the copper-catalyzed DPF system was not approved for workplace applications, whereas the iron system fulfilled all the specifications of the Swiss procedures for DPF approval (VERT).
Mots-clé
Benzofurans/chemical synthesis, Benzofurans/chemistry, Catalysis, Copper/chemistry, Filtration, Gases/analysis, Gasoline, Motor Vehicles, Particulate Matter/chemistry, Tetrachlorodibenzodioxin/analogs &amp, derivatives, Tetrachlorodibenzodioxin/chemical synthesis, Vehicle Emissions/analysis
Pubmed
Web of science
Création de la notice
24/01/2008 13:11
Dernière modification de la notice
20/08/2019 12:22
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