Influence of operating conditions and the role of sulfur in the formation of aerosols from biomass combustion

摘要: Abstract The properties of the fine particles generated from burning biomass have been experimentally studied in a laboratory facility under variety combustion and postcombustion conditions; parameters varied include temperature concentrations oxygen SO 2 flue gases. was added as pure gas or cofiring experiments. Fine are composed only K, Cl, S, form potassium sulfate chloride, except for tests at 1450 °C, where phosphorus appeared also significant amounts, although species which it contained could not be determined exactly. From previous studies, K 4 is known to nucleate first when cools, KCl condensing on these nuclei lower temperatures. chloride/sulfate ratio shown here greatly affected by initial [SO ] [O gases; this dependence can adequately modeled if conversion 3 assumed limiting step route formation. Evidence such kinetic limitation provided. Both experimental results theoretical considerations show that presence Cl submicron particles, associated with severe boiler corrosion, least partly avoided adequate strategies (e.g., cofiring). coarse (>1 μm) studied; both their chemical composition size distribution consistent break-up model fly-ash