Liu, Y orcid.org/0000-0002-9367-3532, Song, C, Lv, G et al. (2 more authors) (2021) Evaluation of the oxidative reactivity and electrical properties of soot particles. Carbon, 178. pp. 37-47. ISSN 0008-6223
Abstract
This paper focuses on the correlation between the oxidative reactivity and electrical properties of soot particles. Soot particles were produced from an n-heptane inverse diffusion flame and were sampled at different heights above the burner (HAB) using a thermophoretic and probe sampling techniques. The electrical properties were characterized by the electrical conductivity and work function, which were evaluated by an atomic force microscopy. The soot reactivity was assessed in terms of activation energy (Ea) and characteristic oxidation temperatures, including peak temperature (TP) and burnout temperature (Tb), using thermogravimetric analysis. As the soot particles gradually age, they have various electrical conductivity distributions. The average electrical conductivity presents an increase by three orders of magnitude when increasing the HAB from 10 to 60 mm. The work function of bulk soot particles shows an increase with the soot maturation. The soot reactivity gradually reduces during the soot maturation process because the values of Ea, TP, and Tb show increases with the increase in HAB. For the soot particles, the Ea and Tp have strongly positive correlations with the work function and with the logarithm of the electrical conductivity. Thus, electrical properties can serve as an indicator of soot reactivity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Elsevier Ltd. All rights reserved. This is an author produced version of an article published in Carbon. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Electrical conductivity; Oxidative reactivity; Soot particle; Work function |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > Institute for Transport Studies (Leeds) > ITS: Spatial Modelling and Dynamics (Leeds) |
Funding Information: | Funder Grant number EU - European Union 815189 |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Mar 2021 15:23 |
Last Modified: | 16 Jan 2023 13:56 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.carbon.2021.02.086 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:171889 |