석탄 연소 시 발생되는 PM2.5 내 탄소 에어로졸의화학 조성 연구

Abstract

The PM2.5 samples were obtained from coal combustion with the four different combustion temperatures (550, 700, 900 and 1100℃) to understand chemical composition in carbonaceous aerosol. OC concentration was the highest when the combustion temperature was 550℃, while, the highest concentration for EC was shown at 700℃ of the coal combustion temperature. However, OC concentrations were very low and EC was not detected when the temperature was over 900℃. It indicates complete combustion was achieved when the combustion temperature was over 900℃. For six groups of organic compounds, n-alkanes and n-alkanoic acids were predominant at all of the combustion temperature in smoke of coal combustion, while, PAHs was only detected at 550℃. The diagnostic ratios of PAHs calculated in this study were 0.59 for Fluoranthene/(Fluoranthene+Pyrene), reflecting the characteristics of coal combustion. The Carbon number Preference Index (CPI) values of n-alkanes which ranged from 0.9 to 1.3 also showed the characteristics of coal combustion.