Abstract
The aim of this study was to characterize the carbonaceous aerosol emissions from three types of boilers: pulverized combustion technology boilers (PCBs), circulating fluidized beds (CFBs), and grate boilers (TGBs). These boilers have been used in the industrial district for heating, power, or production, and they have a maximum thermal output range of 7–300 MW. The actual particle mass and number concentration and particle size distribution (PSD) were obtained from electrical low-pressure impactor (ELPI) measurements, and a preheated sampling system was used to manage water condensation in the stack gases. The carbonaceous composition of the particles was determined by a thermal-optical analysis. Significant differences were observed in the six boilers with regard to the contribution of carbonaceous fractions to the particle mass and number emissions. The TGBs had much higher carbon aerosol emissions with much higher levels of organic carbon (OC) and elemental carbon (EC), whereas they had higher emissio...
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