In addition to the above-mentioned gaseous pollutants in the
flue gases, biomass combustion generates a huge number of fine
particles which have an impact on air quality and consequently
adverse health effects. Aerodynamic diameter is applied to describe
particle size since the particles have different shapes and densities.
The aerodynamic diameter is defined as the diameter of a spherical
particle having a density of 1 g/cm3 that has the same inertial
properties in the flue gas [8]. The particle matter (PM) can range in
particle size from a few nm to tens of mm. Different particle size
fractions of PM, i.e. PM2.5e10 (coarse particles: 2.5e10 mm), PM2.5
(fine particles: 0.1e2.5 mm) and PM0.1 (ultrafine particles: