UV램프분말 내 수은화합물의 열탈착 조건 도출을 위한 기체-고체 반응속도 분석

Kinetic analysis of gas-solid reactions to determine thermal desorption conditions of mercury compounds in UV lamp powder

This study investigated the thermal desorption behavior of mercury compounds in a spent UV lamp powder. Kinetic analysis was conducted based on changes in mercury content at temperatures ranging from 400 to 600℃, with residence times of up to 20 minutes as determined by previous experiments. Mercury conversion increased with temperature and time, showing a rapid initial reaction followed by a slower conversion phase. Among various gas-solid kinetic models, the third-order reaction model (F3) accurately reproduced the experimental data, as evaluated by R2 values and mean squared error. The activation energy calculated from the F3 model was 42.62 kJ/mol. Predicted residence times required to reach the mercury content threshold of 15 mg/kg were determined for each temperature. These findings can be used to optimize thermal desorption conditions for UV lamp waste in compliance with the Minamata Convention.