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In order to know the influence of combustion conditions on the emission level of PAHs, this paper presents the research conducted by using biomass,  Shenmu  coal and 1:1 co-fuel (coal and biomass) incombustion during ignition, high-power heating, low-power heating and cooking through direct-fired and cross-draft stoves, respectively. The thermal efficiency of different fuel compositions and the release of gaseous pollutants, including Polycyclic Aromatic Hydrocarbons (PAHs) in the two stoves under the mentioned four conditions were compared. However, the emissions of gaseous pollutants from the cross-draft stove had found to be less were lower than the emissions from the direct-fired stove. Among the four combustion conditions, the highest concentration of PAHs was emitted during the ignition phase whereas the lowest concentration of the PAHs was generated and emitted during the high-power phase. Between the three types of solid fuel combustion, pure biomass emitted the most PAHs whereas  Shenmu  coal released the lowest concentration of PAHs. The PAHs ring number distribution of the three fuels under four combustion conditions were medium and low molecular weight PAHs.

Evaluation of PAHs, PM 2.5 and gaseous emissions from solid fuel direct-fired and cross-draft stoves