석탄의 발열량 범주별 CO2 배출량 분석을 통한 석탄발전의 온실가스 감축 방안 연구

Abstract

In this paper, we sought to reduce greenhouse gas emissions from coal power plants by analyzing CO₂ emissions by coal calorific value. To this end, the analysis data of coal introduced to three coal power plants in Korea from 2014 to 2021 was used, and the CO₂ emissions for high-calorific coal, medium-calorific coal, and low-calorific coal were analyzed. The CO₂ emission factors were 95,264 kgCO₂/TJ for high-calorific coal, 97,096 kgCO₂/TJ for medium-calorific coal, and 100,027 kgCO₂/TJ for low-calorific coal. CO₂ emission intensity was 891.33 kgCO₂/MWh for high-calorific coal, 908.47 kgCO₂/MWh for medium-calorific coal, and 935.89 kgCO₂/MWh for low-calorific coal. Therefore, CO₂ emissions can be reduced by increasing the proportion of high-calorific coal compared to low-calorific coal in coal power generation. However, some issues need to be addressed before expanding the proportion of high-calorific coal. First, as particulate matter emissions are higher for high-calorific coal, the performance of air pollution prevention facilities must be improved. Second, because the price of high-calorific coal is higher than that of low-calorific coal, policy changes regarding the individual consumption tax imposed on coal are needed to improve the price competitiveness of high-calorific coal.