제올라이트 및 알칼리금속을 이용한 실내용 저농도 CO2 흡착제의 성능 평가

Evaluation for adsorption of low concentration of indoor CO2 adsorption using zeolite and alkali metal

In this study, CO2 adsorbent was produced for minimizing energy loss due to ventilation within the building. For improved selectivity about low concentration of CO2 in multiple-use facilities, the ball type adsorbent was modified from a commercial zeolite, alumina, alkali metals and activated carbon with mixing LiOH, binder, and H2O. We measured specific surface area, pore characteristic, and crystal structure of the modified adsorbent. Effects of alkalization on the absorptive properties of the adsorbents were investigated. Continuous column tests (2,000 ppm) and batch chamber tests (4m3, 5,000ppm) showed that the modified adsorbent indicated about the selectivity of CO2 more than 9.7% (0.613 mmol/g) compared with ordinary adsorbents and CO2 removal efficiency of 88.8% within l hour, respectively. It was estimated that the modified adsorbent was applicable to indoor environments.