고형 폐기물의 열분해 상태에서 비금속 물질의 증발률 예측 = Predicting Evaporation of Non-metallic Species during Pyrolysis of Municipal Solid Waste

다국어 초록 (Multilingual Abstract)

The thermal transformation, including incineration and pyrolysis, of combustible waste is an effective technique toreduce the volume of waste, and has been widely used to treat waste with low levels of radioactivity. These processesgenerate ash composed of inorganic compounds such as solid oxides (SiO2, Al2O3, TiO2, Fe2O3), alkali metals (Na, K,Mg, Ca, Cs), and nonmetallic compounds (S, P, Se). For combustible waste with low levels of radioactivity, it is criticalto limit the emission of Cesium(Cs), which is radioactive, into the environment. The present study develops newunderstanding of the evaporation behaviors of Cs during thermal transformation. Instead of using Cs, which is hazardous,this study investigates S and Se because these elements exhibit evaporation temperatures and pressures that are similarto Cs near the pyrolysis temperature of 400oC. Thermogravimetric analysis (TGA) enabled the quantification of theevaporation rates of S and Se based on their molecular weights and temperatures. The present study demonstrates theaccurate predictions of the evaporation rates of S and Se based on molecular weight and evaporation pressure at specificlocations in the reactor during thermal transformation, as long as the temperature is known.

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