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- W4322001989 abstract "The PM fraction in ambient air due to the formation of secondary inorganic sulphate and nitrate from the emissions of large lignite-fired power plants in Germany is investigated. The power plants are equipped with natural draft cooling towers. The flue gases are fed directly into the cooling towers, giving them an additional lift. The exhausted gas-steam mixture contains the gases CO, CO2, NO, NO2 and SO2, the directly emitted primary particles and additionally an excess of free sulphate ions in water solution, which are not neutralized by cations after the desulfurization stages.  The precursor gases NO2 and SO2 are capable of forming nitric and sulfuric acids by various routes. The acids can be neutralized by ammonia and produce secondary particulate matter by heterogeneous condensation on pre-existing particles.The investigations are carried out with the regional chemical transport model COSMO-MUSCAT as well as with the air parcel model SPACCIM, with which multiphase chemical processes can be described in great detail. Possible formation pathways and dependencies, especially on pH and the meteorological situation, will be identified. The aim is also to estimate the maximum PM load in worst case scenarios. The metal ions released from the ash and the emitted fraction of free sulphate ions remaining in excess after the desulfurization steps play an important role." @default.
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- W4322001989 date "2023-05-15" @default.
- W4322001989 modified "2023-09-29" @default.
- W4322001989 title "Modelling of PM formation in cooling tower plumes" @default.
- W4322001989 doi "https://doi.org/10.5194/egusphere-egu23-11268" @default.
- W4322001989 hasPublicationYear "2023" @default.
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