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- Mannazhi, ManuLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH (author)
Strongly reduced optical absorption efficiency of soot with addition of potassium chloride in sooting premixed flames
- Article/chapterEnglish2023
Publisher, publication year, extent ...
- Elsevier BV,2023
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- LIBRIS-ID:oai:lup.lub.lu.se:62d6b250-56db-4214-904d-fafee200dc1c
- https://lup.lub.lu.se/record/62d6b250-56db-4214-904d-fafee200dc1cURI
- https://doi.org/10.1016/j.proci.2022.07.143DOI
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- Language:English
- Summary in:English
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- Optical properties of soot have been investigated with and without potassium chloride (KCl) salt added to the soot formation process in a premixed ethylene/air flame. A strong decrease in optical absorption efficiency of the soot was observed with increasing amounts of KCl added to the fuel based on the method of fluence curve analysis using laser-induced incandescence (LII). To understand the reason for this major change in absorption efficiency, probe sampling and subsequent structural analysis were performed using Raman spectroscopy and high-resolution transmission electron microscopy (HRTEM). Raman spectra indicated no significant difference between the nanostructure of soot from the two main cases; a reference case without addition of salt, and a case with addition of -600 ppm K. In the case of K addition, HRTEM showed slightly less compact nanostructure signified by somewhat shorter interlayer spacing, and significantly different polar ordering of carbon lamellae indicating smaller primary particles, thereby supporting previous TEM studies on soot sampled from the same flames showing smaller soot particle sizes with KCl addition. The impact on soot absorption properties from the observed differences is discussed. It is speculated that the main cause for the lower absorption with K addition is a quantum confinement effect due to reduction in soot particle size.
Subject headings and genre
- NATURVETENSKAP Fysik Atom- och molekylfysik och optik hsv//swe
- NATURAL SCIENCES Physical Sciences Atom and Molecular Physics and Optics hsv//eng
- Optical properties
- Potassium
- Raman spectroscopy
- Soot
- TEM
Added entries (persons, corporate bodies, meetings, titles ...)
- Bergqvist, SagaLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Aerosoler,LTH profilområden,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH(Swepub:lu)sa1088be (author)
- Török, SandraLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)forb-sto (author)
- Madsen, DanielLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,LTH profilområde: Aerosoler,LTH profilområden,Other operations, LTH,Faculty of Engineering, LTH,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH(Swepub:lu)ftf-dlj (author)
- Tóth, PálUniversity of Miskolc (author)
- Le, Kim CuongLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Aerosoler,LTH profilområden,LTH profilområde: Avancerade ljuskällor,LTH profilområde: Energiomställningen,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,Faculty of Engineering, LTH(Swepub:lu)th5274cu (author)
- Bengtsson, Per ErikLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Aerosoler,LTH profilområden,LTH profilområde: Avancerade ljuskällor,LTH profilområde: Energiomställningen,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,Faculty of Engineering, LTH(Swepub:lu)forb-pbe (author)
- FörbränningsfysikFysiska institutionen (creator_code:org_t)
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- In:Proceedings of the Combustion Institute: Elsevier BV39:1, s. 867-8761540-7489
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