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Adsorption Study of IAQ Index CO2

실내공기질 지표 이산화탄소 농도제어를 위한 흡착연구

  • Wang, Jie (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Jo, Young Min (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Oh, Jongmin (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Heo, Jeong Sook (Department of Environmental Science and Engineering, Kyung Hee University)
  • ;
  • 조영민 (경희대학교 환경응용과학과) ;
  • 오종민 (경희대학교 환경응용과학과) ;
  • 허정숙 (경희대학교 환경응용과학과)
  • Received : 2020.04.17
  • Accepted : 2020.05.27
  • Published : 2020.06.30

Abstract

In this study, electrospun nanofibers made of PAN (polyacrylonitrile) were activated through a physical method to obtain an optimized pore structure. In particular, to enhance the surface alkalinity, the activated carbon fibers (ANFs) were impregnated with tetraethylenepentamine (TEPA) with the aid of HNO3. Then, the low level (3,000 ppm) CO2 adsorption capacity for each ANF sample was evaluated. The specific surface area of ANFs increased from 308.4 ㎡/g to 839.4 ㎡/g and the total pore volume increased from 7.882 ㎤/g to 27.50 ㎤/g. Although the TEPA impregnation reduced the specific surface area and pore volume of the ANFs due to blocking of micropores, the HNO3 pre-oxidation enhanced the amino groups tethered, increasing the amine content from 6.42% to 17.19%, and finally, increased the adsorption capacity of CO2. This study showed that the sample 60-ANF-HNO3-TEPA, which was activated for 60 minutes and was impregnated with HNO3 and TEPA, had the best adsorption capacity for low level (0.3%) CO2 (in a binary mixture with N2).

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