다공성 규조토 세라믹 필터에 의한 실내 오염 물질의 흡착 연구

Abstract

In this work, a porous diatomite ceramic filter was synthesized using diatomite powder at different sintering temperatures from 900 to 1400℃ for adsorption of air pollutants including TMA, H2S, CH3COOH and NH3. The diatomite was characterized by SEM, TGA, XRD and EDS, the results showed that diatomite with several good properties is very suitable for applications including water and air filtration. The results of compressive strength and density of sintered samples indicated that sintering temperature is most significant parameter for the sintering of diatomite powder. The sample synthesized at a molding pressure of 2MPa and a sintering temperature of 1100℃ exhibited best adsorption performance due to its sufficient strength and appropriate porosity. Adsorption isotherm and kinetic models were used to analyze adsorption equilibrium data of air pollutants. Langmuir model was best fitted model with adsorption isotherm data of TMA, H2S, CH3COOH and NH3. The Pseudo-second order kinetic model was best followed with adsorption kinetic data of TMA, CH3COOH and NH3, while the adsorption kinetic data of H2S was best adopted with the Pseudo-first order kinetic model. Thus, the current study showed that diatomite powder is a cost-effective and promising adsorbent material for adsorption of air pollutants. Moreover, porous diatomite ceramic filter is expected to remove SOx and NOx, pollutants in diesel engines.