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In this study, numerical simulations of the movement and emissions dispersion of two pollutants (sulfur dioxide(SO 2 ) and carbon dioxide(CO 2 )) into the atmospheric boundary layer were considered under natural atmospheric conditions. To test the numerical algorithm and to select the optimal turbulent model, the test problem was solved numerically. The obtained computational data were compared with measurement data and values from the computation of other authors and the SST k-omega model illustrated the closest values to the data from the experiment, this is achieved by modifying the boundary condition for turbulent kinetic energy. The tested computational algorithm was used to characterize the emissions process of two pollutants from two chimneys of the Ekibastuz SDPP and the distribution of CO 2 and SO 2 in the air flow field in natural air condition. For this task, four various velocity variations were considered, as well as several various thermal variations (temperature inversion, constant temperature and decreasing temperature by the height). From the obtained computational results, it should be noticed that different environmental temperature conditions extremely impact the distribution of pollutants CO 2 and SO 2 in the atmospheric surface layer, so at constant temperature conditions, the species for all velocity variations have nearly identical species profile.

The assessment of two different pollutants dispersion from a coal-fired power plant for various thermal regimes