Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Real-time, in situ, atomic scale observation of soot oxidation
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. University of Miskolc, Hungary.
Lund University, Sweden.
Lund University, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center. Luleå University of Technology, Sweden.ORCID iD: 0000-0002-9395-9928
2019 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 145, p. 149-160Article in journal (Refereed) Published
Abstract [en]

The oxidation of soot is a complex process due to the heterogeneous structure of the material. Several mechanisms have been hypothesized based on ex situ studies, but need confirmation from in situ observation; furthermore, deeper insight is needed to develop and validate structure-dependent reaction mechanisms. In this work, soot oxidation was for the first time observed at atomic scale in situ, in real-time, using a spherical aberration-corrected Environmental Transmission Electron Microscope. The transformation of individual soot particles was followed through from initiation to complete conversion. Observations clearly showed the existence of different burning modes and particle fragmentation previously hypothesized in the literature. Furthermore, transitioning between the modes—affected by temperature and O2 pressure—was unambiguously observed, explaining previous observations regarding structure-dependent and time-varying oxidation rates. A new mode of burning in which oxidation happens rapidly in the bulk phase with the disruption of long-range lamellar order was observed and is suspected to be dominant at practically relevant conditions. The ability to unambiguously relate different burning modes in terms of nanostructure will be of importance for optimizing both soot emission abatement and properties of nanoparticulate carbon products.

Place, publisher, year, edition, pages
2019. Vol. 145, p. 149-160
Keywords [en]
Aberrations, Oxidation, Soot, Transmission electron microscopy, Environmental transmission electron microscopes, Heterogeneous structures, In-situ observations, Nano particulates, Particle fragmentation, Reaction mechanism, Spherical aberrations, Structure dependent, Dust
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-37328DOI: 10.1016/j.carbon.2019.01.007Scopus ID: 2-s2.0-85059824929OAI: oai:DiVA.org:ri-37328DiVA, id: diva2:1281569
Note

 Funding details: Vetenskapsrådet, VR, 2017-04902; Funding details: Magyar Tudományos Akadémia, MTA, BO/00333/16; Funding details: Kempestiftelserna, SMK-1641.2; Funding details: Knut och Alice Wallenbergs Stiftelse; Funding text 1: The work has been financed by the Swedish government trough both Bio4Energy, a strategic research platform and via the strategic-competence model for RISE ETC. The high temperature reactor used in this work to produce the GCB has been financed by the Kempe Foundation (grant SMK-1641.2 ) and the foundation Energy Technology Center in Piteå, Sweden . P. Toth is grateful for the kind support of the Hungarian Academy of Sciences through the Bolyai Scholarship (grant no. BO/00333/16 ). Therese Vikström and Yngve Ögren (RISE Energy Technology Center) are gratefully acknowledged for their help in soot sampling. Martin Ek and Daniel Jacobsson are grateful to the Knut and Alice Wallenberg foundation and NanoLund. Martin Ek was supported by the Swedish Research Council (grant 2017-04902 ).

Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-06-17Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Wiinikka, Henrik

Search in DiVA

By author/editor
Wiinikka, Henrik
By organisation
ETC Energy Technology Center
In the same journal
Carbon
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 10 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.7