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Experimental Measurement of Competitive Ion-Induced and Binary Homogeneous Nucleation in SO₂/H₂O/N₂ Mixtures

Kim, Tae Oh and Adachi, Motoaki and Okuyama, Kikuo and Seinfeld, John H. (1997) Experimental Measurement of Competitive Ion-Induced and Binary Homogeneous Nucleation in SO₂/H₂O/N₂ Mixtures. Aerosol Science and Technology, 26 (6). pp. 527-543. ISSN 0278-6826. doi:10.1080/02786829708965451. https://resolver.caltech.edu/CaltechAUTHORS:20230222-281718300.1

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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1080/02786829708965451DOIArticle
ORCID:
AuthorORCID
Okuyama, Kikuo0000-0002-1477-1442
Seinfeld, John H.0000-0003-1344-4068
Alternate Title:Experimental Measurement of Competitive Ion-Induced and Binary Homogeneous Nucleation in SO2/H2O/N2 Mixtures
Additional Information:This work was partly supported by Grant-in-Aid for Developmental Scientific Research (No. 07555235) and Grant-in-Aid for International Scientific Research (Joint Research) (No. 08044151) from the Ministry of Education, Culture and Science, and Proposal-Based Advanced Industrial Technology R&D Program of NEDO (No. C-1111) (KO). Acknowledgment is also made to National Science Foundation grant ATM9307603 (IHS).
Funders:
Funding AgencyGrant Number
Ministry of Education, Culture, Sports, Science and Technology (MEXT)07555235
Ministry of Education, Culture, Sports, Science and Technology (MEXT)08044151
New Energy and Industrial Technology Development Organization (NEDO)C-1111
NSFATM-9307603
Issue or Number:6
DOI:10.1080/02786829708965451
Record Number:CaltechAUTHORS:20230222-281718300.1
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20230222-281718300.1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:119474
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Feb 2023 23:50
Last Modified:22 Feb 2023 23:50

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