Abstract
The effective density of fine particles emitted from
small-scale wood combustion of various fuels were
determined with a system consisting of an aerosol
particle mass analyzer and a scanning mobility particle
sizer (APM-SMPS). A novel sampling chamber was combined
to the system to enable measurements of highly
fluctuating combustion processes. In addition,
mass-mobility exponents (relates mass and mobility size)
were determined from the density data to describe the
shape of the particles. Particle size, type of fuel,
combustion phase, and combustion conditions were found to
have an effect on the effective density and the particle
shape. For example, steady combustion phase produced
agglomerates with effective density of roughly 1 g cm-3
for small particles, decreasing to 0.25 g cm-3 for 400 nm
particles. The effective density was higher for particles
emitted from glowing embers phase (ca. 1-2 g cm-3), and a
clear size dependency was not observed as the particles
were nearly spherical in shape. This study shows that a
single value cannot be used for the effective density of
particles emitted from wood combustion.
| Original language | English |
|---|---|
| Pages (from-to) | 13298-13306 |
| Journal | Environmental Science & Technology |
| Volume | 48 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2014 |
| MoE publication type | A1 Journal article-refereed |
