贵州省户用生物质炉具 PM_2.5 和碳质组分排放因子

A modified dilution sampling system for the emission pollutants from household biomass stoves was developed to test eight common rural biomass fuels and thus to realize the localization of the emission factors (EFs) of fine particulate matter (PM_2.5) and carbonaceous aerosols. Considering the different types of biomass fuel, stove, and fuel pretreatment method, a total of 48simulated scenario experiments were set up to quantify the PM_2.5 in the flue gas and carbonaceous component emission factors. The results show that the average provincial EFs of PM_2.5, element carbon (EC) and organic carbon (OC) for firewood and all biomass straw ranged from 2.63~69.93, 0.24~5.87 and 1.54~19.44g/kg, respectively. EC and OC were the major components of PM_2.5 and their ratio slightly varied with biomass fuels. OC2, OC3, OC4 and EC1 were the main components released from residential biomass combustion, especially a higher mass fraction of OC3 or EC1was one of major characteristics of residential biomass combustion in Guizhou Province.