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Environment

SunCoke Energy’s heat-recovery process follows the U.S. Environmental Protection Agency’s Maximum Achievable Control Technology (MACT) emission standards for heat-recovery coke plants that generate steam or electric power. We bring together superior technology, capital and knowledge to make some of the highest quality coke in the market.

The Clean Air Act Amendments of 1990 specifically directed the EPA to evaluate our heat-recovery coke oven technology as a basis for establishing MACT standards for new cokemaking facilities. The five heat-recovery cokemaking facilities that we have built in the U.S. since 1995 have either met or exceeded the applicable Best Available Control Technology (BACT) or Lowest Achievable Emission Rate (LAER) standards, as applicable, set forth for cokemaking facilities.

Our ovens operate under negative pressure, continuously drawing in air to contain pollutants for virtually complete combustion. Before being discharged, flue gas from our ovens is routed to environmental control systems that remove pollutants with high efficiency. In contrast, by-product coke ovens operate under positive pressure and may emit pollutants through cracks in the oven refractory or doors. 

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