Impacts of co-firing biomass on emissions of particulate matter to the atmosphere

摘要: Abstract Gas and particle emissions from co-firing coal two types of biomass versus was evaluated in a circulating fluidized bed boiler operating with constant energy input. Compared to coal, 50% oat hulls (by weight) significantly reduced the emission particulate matter (PM) by 90%, polycyclic aromatic hydrocarbons (PAH) 40%, metals 65%, fossil carbon dioxide 40%. In contrast, 3.8% wood chips had negligible impact on PM PAH, but caused 6% reduction metals. Fuel-based factors for PM, metals, organic species including burning markers retene levoglucosan, were determined. Enrichment (EF) computed examine distribution across fly ash, bottom ash demonstrated enrichment volatile (e.g. Fe, Al, Cr) ash. Co-firing led significant depletion K its Scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM–EDX) analysis revealed wide heterogeneity sizes compositions particles all fuel types. Overall, this study demonstrates that provides several benefits air quality outlines important changes composition when is co-fired coal.