Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Adsorption and Desorption Characteristics of Carbon Dioxide at Low Concentration on Zeolite 5A and 13X

제올라이트 5A와 13X의 저농도 이산화탄소 흡착 및 탈착특성

  • Cho, Young-Min (Railroad Environment Research Department, Korea Railroad Research Institute) ;
  • Lee, Ji-Yun (Railroad Environment Research Department, Korea Railroad Research Institute) ;
  • Kwon, Soon-Bark (Railroad Environment Research Department, Korea Railroad Research Institute) ;
  • Park, Duck-Shin (Railroad Environment Research Department, Korea Railroad Research Institute) ;
  • Choi, Jin-Sik (Railroad Environment Research Department, Korea Railroad Research Institute) ;
  • Lee, Ju-Yeol (Technology Institute, Anytech Co., Ltd.)
  • 조영민 (한국철도기술연구원 철도환경연구실) ;
  • 이지윤 (한국철도기술연구원 철도환경연구실) ;
  • 권순박 (한국철도기술연구원 철도환경연구실) ;
  • 박덕신 (한국철도기술연구원 철도환경연구실) ;
  • 최진식 (한국철도기술연구원 철도환경연구실) ;
  • 이주열 ((주)애니텍 기술연구소)
  • Received : 2010.12.24
  • Accepted : 2011.02.18
  • Published : 2011.04.30
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Abstract

A way to adsorptively remove indoor carbon dioxide at relatively lower concentration under ambient temperature was studied. A small lab-scale carbon dioxide adsorption and desorption reactors were prepared, and 5A and 13X zeolites were packed in this reactors to investigate their adsorption and desorption characteristics. The inflow carbon dioxide concentration was controlled to 5,000 ppm, relatively higher concentration found in indoor spaces with air quality problems, by diluting carbon dioxide with nitrogen gas. The flow rate was varied as 1~5 L/min, and the carbon dioxide concentration after this reactor was constantly monitored to examine the adsorption characteristics. It was found that 5A adsorbed more carbon dioxide than 13X. A lab-scale carbon dioxide desorption reactor was also prepared to investigate the desorption characteristics of zeolites, which is essential for the regeneration of used zeolites. The desorption temperature was varied as $25{\sim}200^{\circ}C$, and the desorption pressure was varied as 0.1~1.0 bar. Carbon dioxide desorbed better at higher temperature, and lower pressure. 5A could be regenerated more than three times by thermal desorption at $180^{\circ}C$. It is required to modify zeolites for higher adsorption and better regeneration performances.

Keywords

References

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