The objective of this comprehensive investigation is to determine the quantity and characteristics of PM2.5 emissions from a pilot-scale pulverized coal combustor. The specific technical objectives of the study are the following:

• Measure the size/composition distribution of the particulate emissions (with emphasis on ultrafine particles).
• Quantify the emission rates of organic and elemental carbon particulate matter as a function of sampling temperature, relative humidity, and dilution rate.
• Quantify potential sampling artifacts associated with water, volatile, and semi-volatile compounds as functions of sampling conditions.
• Define a sampling protocol to characterize PM2.5 emissions from pulverized coal boilers and other stationary combustion systems.