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Characteristics of aerosol particles formed during grate combustion of moist forest residue

Pagels, Joakim LU ; Strand, Michael; Rissler, Jenny LU ; Szpila, Aneta; Gudmundsson, Anders LU ; Bohgard, Mats LU ; Lillieblad, L; Sanati, Mehri LU and Swietlicki, Erik LU (2003) In Journal of Aerosol Science 34(8). p.1043-1059
Abstract
The characteristics of aerosol particles formed during combustion of moist forest residue were studied as a function of load in a I MW moving grate boiler and at almost full load in a similar larger 6 MW boiler. The coarse (1 mum < d(ae) < 10 mum) particle number and mass concentration increased by more than one order of magnitude and the fine particle mean diameter, total volume and mass decreased when the load was increased from 50% to 75%. The combined effects led to an increase in PM10 with increasing load. The number and mass concentration and the size distribution were similar in the two boilers when operated at high load. The dominant elements (Z > 12) were K, S and Cl in the fine mode and Ca, K and S in the coarse mode.... (More)
The characteristics of aerosol particles formed during combustion of moist forest residue were studied as a function of load in a I MW moving grate boiler and at almost full load in a similar larger 6 MW boiler. The coarse (1 mum < d(ae) < 10 mum) particle number and mass concentration increased by more than one order of magnitude and the fine particle mean diameter, total volume and mass decreased when the load was increased from 50% to 75%. The combined effects led to an increase in PM10 with increasing load. The number and mass concentration and the size distribution were similar in the two boilers when operated at high load. The dominant elements (Z > 12) were K, S and Cl in the fine mode and Ca, K and S in the coarse mode. The dominant ions in the fine mode were K+, SO42- and CO32-. The fine mode particles had hygroscopic growth factors of around 1.65 at RH=90%, with a deliquescence point at a relative humidity between 30% and 60%. It was assessed that K2CO3 is responsible for the low deliquescence point. Fine mode particles of a given dry diameter had similar chemical composition. (C) 2003 Elsevier Ltd. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Journal of Aerosol Science
volume
34
issue
8
pages
1043 - 1059
publisher
Elsevier
external identifiers
  • wos:000184848500006
  • scopus:0042121444
ISSN
0021-8502
DOI
10.1016/S0021-8502(03)00077-6
language
English
LU publication?
yes
id
3e891d23-6efd-4e42-b8ca-3c69788924e3 (old id 303520)
date added to LUP
2007-09-20 08:12:11
date last changed
2017-01-08 05:20:36
@article{3e891d23-6efd-4e42-b8ca-3c69788924e3,
  abstract     = {The characteristics of aerosol particles formed during combustion of moist forest residue were studied as a function of load in a I MW moving grate boiler and at almost full load in a similar larger 6 MW boiler. The coarse (1 mum &lt; d(ae) &lt; 10 mum) particle number and mass concentration increased by more than one order of magnitude and the fine particle mean diameter, total volume and mass decreased when the load was increased from 50% to 75%. The combined effects led to an increase in PM10 with increasing load. The number and mass concentration and the size distribution were similar in the two boilers when operated at high load. The dominant elements (Z &gt; 12) were K, S and Cl in the fine mode and Ca, K and S in the coarse mode. The dominant ions in the fine mode were K+, SO42- and CO32-. The fine mode particles had hygroscopic growth factors of around 1.65 at RH=90%, with a deliquescence point at a relative humidity between 30% and 60%. It was assessed that K2CO3 is responsible for the low deliquescence point. Fine mode particles of a given dry diameter had similar chemical composition. (C) 2003 Elsevier Ltd. All rights reserved.},
  author       = {Pagels, Joakim and Strand, Michael and Rissler, Jenny and Szpila, Aneta and Gudmundsson, Anders and Bohgard, Mats and Lillieblad, L and Sanati, Mehri and Swietlicki, Erik},
  issn         = {0021-8502},
  language     = {eng},
  number       = {8},
  pages        = {1043--1059},
  publisher    = {Elsevier},
  series       = {Journal of Aerosol Science},
  title        = {Characteristics of aerosol particles formed during grate combustion of moist forest residue},
  url          = {http://dx.doi.org/10.1016/S0021-8502(03)00077-6},
  volume       = {34},
  year         = {2003},
}