engleski

Investigation of the Sulfur Dioxide Absorption in Water Droplets

Flue gas desulfurization in spray towers is an efficient sulfur dioxide removal method for the combustion flue gases. It is based on the absorption mechanism of sulfur dioxide in droplets falling in the stream of flue gases, removing the pollutants due to concentration differences. To describe all the relevant phenomena, a lumped-parameter absorption model for the falling pure water droplet has been implemented. The main factors limiting the absorption are the mass transfer of pollutants through the gas-droplet interface and the aqueous phase chemistry in droplet. Mass transfer coefficient modeling is the most significant parameter regulating the absorption dynamic into the droplet, while the in-droplet chemistry regulates the maximum quantity of dissolved pollutants. The implemented model was used on the single droplet and compared with the available literature data. With the stricter legislation regulating the allowed emissions for marine and stationary applications, the model can be used for prediction of sulfur dioxide uptake on a single droplet scale, and as a basis for further development of the more complex sulfur dioxide absorption models.

desulfurization ; spray absorption ; mass transfer coefficient ; water chemistry

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