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Characterization of coated soot particles - Validating a new APM software and using it to design aerosol measurement set-ups

Petersson, Jakob LU (2016) MVEM45 20161
Studies in Environmental Science
Abstract
Soot characteristics such as absorbing light are heavily dependent on its structure and interaction with other compounds. By coating soot or collapsing the soot core, the characteristics will be altered which affects its climate forcing, the lung deposition and other interactions with the human upper airways. In this work a new approach to measure aerosol particle mass with the Aerosol Particle Mass analyser (APM) was analysed and validated. A set-up was designed to coat soot particles with well-defined coating levels under controlled conditions. The new approach was used to prove restructuring of the soot core when coated by a hygroscopic compound and exposed to high relative humidity. Experiments were made with a Potential Aerosol Mass... (More)
Soot characteristics such as absorbing light are heavily dependent on its structure and interaction with other compounds. By coating soot or collapsing the soot core, the characteristics will be altered which affects its climate forcing, the lung deposition and other interactions with the human upper airways. In this work a new approach to measure aerosol particle mass with the Aerosol Particle Mass analyser (APM) was analysed and validated. A set-up was designed to coat soot particles with well-defined coating levels under controlled conditions. The new approach was used to prove restructuring of the soot core when coated by a hygroscopic compound and exposed to high relative humidity. Experiments were made with a Potential Aerosol Mass (PAM) chamber to simulate atmospheric aging of soot with the precursor alpha-pinene showing promising results of the combination PAM-APM.
Black carbon (BC) being the second most important climate forcer makes it crucial to map out its atmospheric interactions for future climate research. By applying coating to soot the absorption rate of light can increase with 100% since the coating works as a lens focusing the light into the black soot core. Black carbon being associated with PM2.5 is linked to decreased lung function, increased respiratory symptoms and cardiopulmonary diseases. (Less)
Popular Abstract (Swedish)
Beroende på hur förbränningen av bränsle sker i motorer och var vi eldar vårt virke så kommer det resulterande sotets struktur att få olika effekter på klimat och hälsa. Sotstrukturen beror på många parametrar till exempel på temperaturen vid förbänning av bränsle och vad som händer med sotet efter förbänning i atmosfären är beroende på var på jorden man är.
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author
Petersson, Jakob LU
supervisor
organization
course
MVEM45 20161
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Soot, structure, coating, APM, aerosol, Dioctyl Sebacate, Succinic Acid, miniCast, Impinger, electric mobility, effective density.
language
English
id
8871352
date added to LUP
2016-05-03 09:32:05
date last changed
2016-05-03 09:32:05
@misc{8871352,
  abstract     = {Soot characteristics such as absorbing light are heavily dependent on its structure and interaction with other compounds. By coating soot or collapsing the soot core, the characteristics will be altered which affects its climate forcing, the lung deposition and other interactions with the human upper airways. In this work a new approach to measure aerosol particle mass with the Aerosol Particle Mass analyser (APM) was analysed and validated. A set-up was designed to coat soot particles with well-defined coating levels under controlled conditions. The new approach was used to prove restructuring of the soot core when coated by a hygroscopic compound and exposed to high relative humidity. Experiments were made with a Potential Aerosol Mass (PAM) chamber to simulate atmospheric aging of soot with the precursor alpha-pinene showing promising results of the combination PAM-APM. 
Black carbon (BC) being the second most important climate forcer makes it crucial to map out its atmospheric interactions for future climate research. By applying coating to soot the absorption rate of light can increase with 100% since the coating works as a lens focusing the light into the black soot core. Black carbon being associated with PM2.5 is linked to decreased lung function, increased respiratory symptoms and cardiopulmonary diseases.},
  author       = {Petersson, Jakob},
  keyword      = {Soot,structure,coating,APM,aerosol,Dioctyl Sebacate,Succinic Acid,miniCast,Impinger,electric mobility,effective density.},
  language     = {eng},
  note         = {Student Paper},
  title        = {Characterization of coated soot particles - Validating a new APM software and using it to design aerosol measurement set-ups},
  year         = {2016},
}