LAUSR

A novel two-stage alumina reactor system is developed for studying particulate matter (PM) emission from in situ volatiles combustion. It enables the generation of in situ volatiles at different pyrolysis temperatures (up to 1300 °C) and the subsequent combustion of in situ volatiles in air and oxyfuel at 1300 °C. It is found that the PM emitted from volatiles combustion contains only PM with aerodynamic diameter <1 μm (PM1) and has a unimodal distribution. An increase in pyrolysis temperature from 1100 to 1300 °C results in a substantial increase in PM1 yield and a shift of fine mode diameter from 0.043 to 0.108 μm. The PM1 emitted from the volatiles generated at 1100 °C mainly consists of Na, K, S, and P. For PM1 emitted from the volatiles generated at 1300 °C, there are substantial increases in the yield of Na, K, and P; in addition, Mg and Si are present in PM1 because of the release of these inorganic species from biosolid into the volatiles. For trace elements, increasing pyrolysis temperature from ...