Article pubs.acs.org/EF
Impact of Coal Fly Ash Addition on Combustion Aerosols (PM2.5) from Full-Scale Suspension-Firing of Pulverized Wood Anne J. Damoe,*,† Hao Wu,† Flemming J. Frandsen,† Peter Glarborg,† and Bo Sander‡ †
Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs Lyngby, Denmark DONG Energy Power A/S, Kraftværksvej 53, DK-7000 Fredericia, Denmark
‡
S Supporting Information *
ABSTRACT: The formation of combustion aerosols was studied in an 800 MWth suspension-fired power plant boiler, during combustion of pulverized wood pellets with and without addition of coal fly ash as alkali capture additive. The aerosol particles were sampled and characterized by a low-pressure cascade impactor (LPI), and elemental composition and particle morphology was studied by electron microscopy methods (SEM/EDS and TEM/EDS). During pulverized wood combustion, the mass-load of submicrometer particles (PM1) was in the range 44−47 mg/Nm3, and the mass-based particle size distribution revealed a distinct submicrometer peak located around 0.2 μm. This peak consisted mainly of aggregated ultrafine (
