Heterogeneous chemical processing of 13NO2 by monodisperse carbon aerosols at very low concentrations

Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
The Journal of Physical Chemistry
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
100
Ausgabe / Nummer
38
Seiten / Dauer
15487-15493
Patentnummer
Verlag / Herausgebende Institution
American Chemical Society
Verlagsort / Veranstaltungsort
Washington, D.C.
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
The heterogeneous reaction of NO2 with different carbon aerosol particles was investigated in situ. The NO2 was labeled with the β+-emitter 13N (half-life 10.0 min) which allowed application of NO2 at very low concentrations. The carbon aerosol was either produced by a spark discharge generator using graphite electrodes or by a brush generator resuspending commercial soot material. Monodisperse size cuts between 50- and 490-nm diameter were selected and mixed with the 13NO2. After a defined reaction time, the different reaction products were separated by means of selective traps and detected on-line by γ-spectrometry. A sticking coefficient for chemisorption of NO2 between 0.3 × 10ˉ⁴ and 4.0 × 10ˉ⁴ and a rate constant for the reduction of adsorbed NO2 to NO(g) between 4.0 × 10 ˉ⁴ and 9.4 × 10 ˉ⁴ /s were determined for both aerosols. The sticking coefficient obtained in this study in situ with aerosol particles is 2 orders of magnitudes smaller than the uptake coefficient recently reported with bulk carbon material.
Schlagwörter
Fachgebiet (DDC)
550 - Geowissenschaften
540 - Chemie
Projekt
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
0022-3654
1541-5740
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Nein
Zukunftsfelder FHNW
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Closed
Lizenz
Zitation
KALBERER, Markus, K. TABOR, Markus AMMANN, Yves PARRAT, Ernest WEINGARTNER, D. PIGUET, E. RÖSSLER, Dieter T. JOST, Andreas TÜRLER, Heinz W. GÄGGELER und Urs BALTENSPERGER, 1996. Heterogeneous chemical processing of 13NO2 by monodisperse carbon aerosols at very low concentrations. The Journal of Physical Chemistry. 19 September 1996. Bd. 100, Nr. 38, S. 15487–15493. DOI 10.1021/jp9606974. Verfügbar unter: https://irf.fhnw.ch/handle/11654/46915