Gaseous, PM 2.5 Mass, and Speciated Emission Factors from Laboratory Chamber Peat Combustion

摘要: Abstract. Peat fuels representing four biomes of boreal (western Russia and Siberia), temperate (northern Alaska, U.S.A.), subtropical southern Florida, U.S.A), tropical (Borneo, Malaysia) regions were burned in a laboratory chamber to determine gas particle emission factors (EFs). Tests with 25 % fuel moisture conducted predominant smoldering combustion conditions (average modified efficiency [MCE] = 0.82 ± 0.08). Average fuel-based EFCO2 (carbon dioxide) are highest (1400 38 g kg−1) lowest (1073 63 for the Alaskan Russian peats, respectively. EFCO monoxide) EFCH4 (methane) ~12 %‒15 % ~0.3 %‒0.9  % EFCO2, range 157‒171 kg−1 3‒10 kg−1, EFs nitrogen species at same magnitude EFCH4, an average 5.6 4.8 4.7 3.1 EFNH3 (ammonia) EFHCN (hydrogen cyanide); 1.9 1.1 EFNOx (nitrogen oxides); as well 2.4 1.4 2.0 0.7 EFNOy (reactive nitrogen) EFN2O (nitrous oxide). An oxidation flow reactor (OFR) was used simulate atmospheric aging times ~2 ~7 days compare fresh (upstream) aged (downstream) emissions. Filter-based EFPM2.5 varied by >4-fold (14‒61 without appreciable changes between The majority consists EFOC (organic carbon), EFOC/EFPM2.5 ratios 52 %‒98 % emissions, ~15 % degradation after aging. Reductions (~7‒9 most apparent peats largest organic carbon that evolves 95 %) total emitted is phase 54 %‒75 % CO2, followed 8 %‒30 % CO. Nitrogen measured explains 24 %‒52 % consumed 35 11 %, consistent past studies report ~one- two-thirds biomass smoke. (>99 %) phase, 16.7 % N NH3 9.5 % HCN. N2O NOy constituted 5.7 % 2.9 % N. from this study can be refine current emissions inventories.