Abstract
Although sulphur emissions (mainly as SO 2) have been continuously decreasing over the last 20 years in most western industrialized countries, localized SO 2 problems still exist in conjunction with strong local emission, meteorological, and topographical factors. In this study, the effect of supplementary installed flue gas desulphurization (FGD) units at high-capacity power plants on regional air pollution in the Carpathian Basin is investigated. The dispersion and accumulation of the SO 2 air pollutant are studied with the regional three-dimensional on-line atmosphere-chemistry model REMOTE. The changes in the SO 2 air pollution are investigated by parallel simulations in a case study, where the single modified parameter is the SO 2 emission rate. The results show that FGD units significantly reduce the horizontal and the vertical dispersion of the emitted SO 2, and its transboundary transport, too. Beside the SO 2 removal efficiency, the dispersion and accumulation also depend on the seasonal weather conditions. During winter, the dispersion and accumulation are higher than in other seasons. Due to this phenomenon, higher SO 2 removal efficiency is needed to guarantee similar air quality features like in the other seasons.
Published Version
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