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Particulate matter research is of great significance in solving atmospheric environment problems. The heterogeneous reaction of mixed gas on different mineral oxides and coal ash was studied based on a laboratory-built aerosol generating reactor. The product formed on particles was investigated by ion chromatography (IC). SO₂ and NO₂ could react on oxides to form secondary particles and the order of reactivity of mineral oxides under laboratory reaction conditions is: Al₂O₃>MgO>CaO>>SiO₂, Fe₂O₃. NO₂ has a synergistic effect on the heterogeneous reaction of SO₂ on Al₂O₃ in the presence of O₂. The synergistic effect of SO₂ and NO₂ on Al₂O₃ is further enhanced in the case of high relative humidity (RH) and in the presence of NH3. The reaction on Al₂O₃ under different gas concentration ratios is compared, and it is identified that SO₂ and NO₂ concentrations make an effect on aerosol production. The heterogeneous reactions of SO₂ and NO₂ on various coal ash are different. The order of reactivity of the three coal ashes is WH>MHU>Centennial. The secondary particulate matter formed on coal ash is higher than that on single metal oxide.
목차
ABSTRACT
1. Introduction
2. Experimental sections
3. Results and discussion
4. Conclusions
References
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UCI(KEPA) : I410-ECN-0101-2020-539-001107573