Air Dispersion Modeling of the Alexandria Portland Cement Company (APCC) Stack Emissions


Alexandria Portland Cement Company (APCC), located at Wadi Al-Qamar – Al-Max area, Alexandria, was in the process of switching the fuel used to fire one of its cement kilns from Natural Gas (NG) to either coal, Petroleum coke (PC) or combined fuel (PC and NG). The company commissioned Environics to carry out the air dispersion modeling required to determine the environmental impacts of using each fuel alternative.

Environics undertook detailed air dispersion modeling to determine the likely ground level concentrations of pollutants generated from the stack of the cement kiln of concern according to four scenarios: existing use of NG only; 100% coal; 100% PC, and combined fuel of 50% NG and 50% PC. For each scenario, ground level concentrations of the considered pollutants (TSP, NO2 and SO2) were estimated and compared with the maximum limits allowed by the Egyptian regulations.

The final report that detailed the results and analysis included: air emissions sources and characteristics; air dispersion modeling (emissions and meteorological input data, and modeled time span), assessment criteria and modeling results, and final conclusions.

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