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| Titel: |
Experimental Measurement of Competitive Ion-Induced and Binary Homogeneous Nucleation in SO2/H2O/N2 Mixtures |
| Auteur: |
Kim, Tae Oh Adachi, Motoaki Okuyama, Kikuo Seinfeld, John H. |
| Verschenen in: |
Aerosol science and technology |
| Paginering: | Jaargang 26 (1997) nr. 6 pagina's 527-543 |
| Jaar: |
1997 |
| Inhoud: |
Alpha-ray radiolysis of SO2/H2O/N2 gas mixtures is carried out to investigate the competitive processes of ion-induced and binary homogeneous nucleation in this system. Charged particles in the system are indicative of ion-induced nucleation and most likely involve water clusters. Charged particle neutralization was prevented by application of a dc electric field, therefore, uncharged particles in the system result from homogeneous nucleation. Hydroxyl (OH) radicals are generated by the a-ray radiolysis. Oxidation of SO2 by OH radicals leads to sulfuric acid (H2SO4) vapor molecules and to subsequent binary homogeneous nucleation of H2SO4/H2O. At increased SO2 concentrations the contribution of binary homogeneous nucleation increases relative to that of ion-induced nucleation. Electrical mobility distributions of bipolar ions and nanometer-sized charged particles were measured with a cluster-differential mobility analyzer combined with a Faraday cup electrometer. In this system, ion-induced nucleation occurred preferentially on negative rather than positive ions. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 6 gevonden artikelen
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