Post-Combustion

Post Combustion activities focus on pollution control and waste minimization activities. The pollution control options focus on removing coincidentally manufactured constituents from flue gas streams.  Waste minimization options focus on the sale and management of coal combustion by-products containing coincidentally manufactured constituents. 

Power plants that burn coal/coal blend/oil

Inputs

Outputs

Flue gas           --trace metals           --acid gases           --Co2/CO           --other constituents (PAHs, dioxins) Chemical Additives           --Limestone (CaCO3) for Scrubber           --Ammonia for NOx removal           --Catalyst for NOx removal           --Flue gas conditioning chemicals

1. Solids --Fly Ash (Trace metals) --Bottom Ash (Trace Metals) --Scrubber Sludge (Trace Metals) 2. Air                    --Acid Gases (hydrochloric acids,                      sulfuric acids, and hydroflouric                      acid)                    --Particulate matter (trace metals)                    --Water vapor                    --Heat                    --CO2 / CO                    --NOx 3. Water --Cooling water discharge

Power plants that burn Natural Gas

Inputs	Outputs
Flue Gas                 -trace metals         -acid gases         -Co2/CO         -other constituents (PAHs, dioxins) Chemical Additives         -Ammonia for NOx removal         -Catalyst for NOx removal	Air          --Acid Gases (hydrochloric acids,            sulfuric acids, and hydroflouric acid)          --Water vapor          --Heat          --CO2 / CO          --NOx Water          --Cooling water discharge

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