Joakim Pagels

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Joakim Pagels
Secondary Aerosol Formation from Combustion
Aerosols

• Div. Aerosol Technology (EAT)

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Objectives
?

• Improved understanding of the contribution from
  combustion sources to secondary aerosol
  formation, importance for both health and climate
• Primary and secondary emission factors
• Influence of transformation on composition,
  morphology, hygroscopic
• properties and optical properties
• Implement in-situ techniques to determine
  composition and morphology
• Sources studied in chamber upon UV and O3
  exposure
• Biomass combustion/Wood smoke emissions
• Engine emissions
• Indoor sources, e.g. Incense, Fragrance products,
  
• Building material etc
• Field measurements in indoor and outdoor air
• Identify SOA signatures in indoor and outdoor air
• Transformations from outdoor to indoor air

• Team Joakim Pagels, Mats Bohgard, Anders
  Gudmundsson, Christina Isaxon, Erik Swietlicki,
  Pontus Roldin,....... new diploma workers and
  external co-workers

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Ongoing Projects

• Secondary Aerosol Formation from
  Anthropogenic Combustion Sources.
• Partners Erik Swietlicki, Copenhagen
  University (Merete Bilde), Umeå University
  (Christoffer Boman), Insbruck University (Armin
  Wisthaler)
• Funding Period (2008-2010, 2.8 MSEK)
• Single Particle Chemical Composition and Mixing
  Characteristics of Fine and Ultrafine Particles
  in Indoor and Outdoor Air
• Partners Erik Swietlicki
• Funding Period (2007-2010 22 year Research
  Assistantship, 1.4 1.4 MSEK)
• Aerosol Mass Spectrometry for Characterisation
  of Particles in Flue gases from Wood and Crop
  Fuels - A tool for Minimising Emissions.
• Partners Erik Swietlicki, Umeå University
  (Christoffer Boman)
• Funding Period (2008-2009, 0.5 MSEK)
• Equipment for Research on Aerosols and their
  Effects on Climate and Human Health Funding to
  buy a HR-TOF-Aerosol Mass Spectrometer
• PI Erik Swietlicki, Partners CAST
• Funding Period (2007, 4.5 MSEK)

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Primary Biomass Emissions
Efficient Hot Airstarved Low
Temp.
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Secondary Aerosol Formation
 

VOCs
 
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Ageing of diesel emissions
Robinson et al. 2007 Science
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Ageing of soot
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Ageing of soot
Fresh Soot
H2SO4 coated Soot
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Ageing of soot
Fresh Soot
H2SO4 coated Soot

• Pagels et al. 2008, Khalizov et al. 2008 to be
  submitted to AST

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Aerosol Particle Mass analyzer (APM) (Ehara et
al., 1997)
Inner electrode
Aerosol entrance

r2
r1
High voltage
w
Outer electrode
Mass classified aerosol exit
Z

• Select particles of known mass even
• for agglomerates
• In-situ measurment of particle morphology
• Determine mass fractions of condensed
• species in secondary aerosol formation

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Planned activities

• 2008
• Implementation of Aerosol Mass Spectrometer
  PhD/MSc projects
• Pilot study on ageing of indoor combustion
  aerosols (incense and ETS) using O3 as oxidant.
• Field measurements in Vavihill
• Implementation of Aerosol Particle Mass Analyzer
  PhD/MSc project
• Morphology and Mass-Mobility relationship of
  welding and candle soot agglomerates.
• Preparing aerosol chamber for UV exposure
  experiments
• 2009-2010
• Measurements of fresh and aged wood smoke in
  Umeå.
• Measurements of fresh and aged engine exhaust in
  Chamber.
• Field measurements using AMS in indoor and
  outdoor air

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Other Projects/Long Term Goals

• A detailed understanding of the processes
  involved in transforming combustion aerosols in
  outdoor and indoor environments.
• To predict influence of processing on chemical
  composition, hygroscoppic properties, optical
  properties, morphology and other health and
  climate relevant properties
• Influence of chemical composition,
  morphology/surface area/particle size on health
  effects of airborne particles
• Lung deposition of highly agglomerated nano
  particles using modified RESPI
• Apply the AMS to measure chemically resolved lung
  deposition
• Cell exposures to complement human exposures and
  allow detailed studies on the influence of
  composition, size surface are etc on health
  effects
• Building a deposition chamber for cell exposures
  which mimics deposition in the respiratory tract
• Use secondary combustion aerosols in human
  exposure studies

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Markers for Wood- and Cellulose-Burning

• Any Wood, Biomass, Paper, Wood Products,
  Cellulose containing Products

Levoglucosan
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