Preparation of Honeycomb Carbon Dioxide Adsorbent Impregnated $K_2CO_3$ and Its Characterization

$K_2CO_3$를 담지시킨 고체 허니컴 이산화탄소 흡수제의 제조 및 이의 특성 평가

  • 이동철 (호서대학교 화학공학과) ;
  • 김진배 (호서대학교 화학공학과) ;
  • 유윤종 (한국에너지기술연구원 에너지융합소재연구단)
  • Published : 2012.12.10

Abstract

To capture and recover carbon dioxide ($CO_2$), we impregnated honeycomb made of ceramic paper with $K_2CO_3$ and its absorption characteristics of $CO_2$ were investigated. The absorption amount of $CO_2$ on the honeycomb absorbent impregnated with $K_2CO_3$ was 13.8 wt% at a constant temperature ($70^{\circ}C$) and relative humidity (66%) condition. Because the absorption amount of $CO_2$ achieved almost the same loading ratio of $K_2CO_3$ (17.6 wt%), the absorption reaction of $CO_2$ by $K_2CO_3$ on the honeycomb absorbent seems to be going smoothly. In addition, $CO_2$ absorption breakthrough characteristics of the honeycomb absorbent were analyzed at the temperature range of $50{\sim}80^{\circ}C$, and the water vapor was fed to an absorption column before the feeding of $CO_2$ or simultaneously with $CO_2$. As a result, the absorption capacity of $CO_2$ was more enhanced using the water vapor supplying before $CO_2$ than that of simultaneous supplying. It was confirmed by temperature programmed desorption analysis that the $KHCO_3$ produced by the absorption reaction of $K_2CO_3$ and $CO_2$ is regenerated by the desorption of $CO_2$ at a temperature of about $128^{\circ}C$.

Keywords

$CO_2$ absorption;potassium carbonate;honeycomb;carbon dioxide;ceramic sheet

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