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| Titel |
Atmospheric degradation of 3-methylfuran: kinetic and products study |
| VerfasserIn |
A. Tapia, F. Villanueva, M. S. Salgado, B. Cabañas, E. Martínez, P. Martín |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 7 ; Nr. 11, no. 7 (2011-04-05), S.3227-3241 |
| Datensatznummer |
250009589
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| Publikation (Nr.) |
 copernicus.org/acp-11-3227-2011.pdf |
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| Zusammenfassung |
| A study of the kinetics and products obtained from the reactions of
3-methylfuran with the main atmospheric oxidants has been performed. The
rate coefficients for the gas-phase reaction of 3-methylfuran with OH and
NO3 radicals have been determined at room temperature and atmospheric
pressure (air and N2 as bath gases), using a relative method with
different experimental techniques. The rate coefficients obtained for these
reactions were (in units cm3 molecule−1 s−1) kOH = (1.13
± 0.22) × 10−10 and kNO3 = (1.26 ± 0.18) ×
10−11. Products from the reaction of 3-methylfuran with OH, NO3
and Cl atoms in the absence and in the presence of NO have also been
determined. The main reaction products obtained were chlorinated
methylfuranones and hydroxy-methylfuranones in the reaction of 3-methylfuran
with Cl atoms, 2-methylbutenedial, 3-methyl-2,5-furanodione and
hydroxy-methylfuranones in the reaction of 3-methylfuran with OH and
NO3 radicals and also nitrated compounds in the reaction with NO3
radicals. The results indicate that, in all cases, the main reaction path is
the addition to the double bond of the aromatic ring followed by ring opening in
the case of OH and NO3 radicals. The formation of 3-furaldehyde and
hydroxy-methylfuranones (in the reactions of 3-methylfuran with Cl atoms and
NO3 radicals) confirmed the H-atom abstraction from the methyl group
and from the aromatic ring, respectively. This study represents the first
product determination for Cl atoms and NO3 radicals in reactions with
3-methylfuran. The reaction mechanisms and atmospheric implications of the
reactions under consideration are also discussed. |
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