Implementation Analysis of Emission Reduction System for SO₂, NO₂, and Hg Emission Reduction Equipment in Coal-Fired Power Plants
Keywords:
CFPP, SO2 Emission, NO2 Emission, Mercury Emission, Net Zero EmissionAbstract
Coal-Fired Power-Plants (CFPP) have four main emission parameters: SO₂, NO₂, particulate matter, and Hg. Currently, many existing CFPP have yet to install emission reduction equipment for SO₂, NO₂, and Hg emission. This study aims to evaluate the technical and economic impacts of implementing emission reduction equipment in existing CFPP with capacities between 50 and 1000 MW. This study is conducted using SteamPro–Thermoflow, a well-known software in the thermal power plant industry for heat and mass balance analysis. The simulations show that Selective Catalytic Reduction (SCR) achieves 80% NO₂ reduction efficiency, higher than Selective Non-Catalytic Reduction (SNCR) at 40%. For SO₂ reduction, Wet and Sea Water Flue Gas Desulfurization (WFGD and SWFGD) reach 95%, while Semi-Dry FGD (SDFGD) achieves 90%. Activated Carbon Injection (ACI) for mercury (Hg) reduction achieves 60%, and up to 85% when combined with FGD. For auxiliary power consumption, at 0.01–0.03% of gross power for NO₂ reduction, 0.25–0.50% for SO₂ reduction, and 0.17–0.22% for Hg reduction. Investment costs are 50–120 USD/kW for SNCR, 5–20 USD/kW for SCR, 10–35 USD/kW for ACI, and 32–110 USD/kW for FGD. The study results are expected to guide emission reduction policies in power generation sector.
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