화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.4, 345-350, June, 2002
Export Citation
제올라이트 X/활성탄 복합체의 CO2 흡착 특성 연구
Adsorption Characteristics of CO2 on Zeolite X/activated Carbon Composite
김진태, 이종석, 홍지숙, 서정권†, 이창하1, 이정민
  • 한국화학연구원 응용화학연구부, 대전 305-600
  • 1연세대학교 화학공학과, 서울 120-749
JIn Tae Kim, Jong Seok Lee, Ji-Sook Hong, Jeong Kwon Suh†, Chang Ha Lee1, and Jung Min Lee
  • Applied Chemistry & Engineering Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
  • 1Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea
E-mail:
초록
왕겨를 출발 원료로 하여 제올라이트 X/활성탄 복합체(제오카본)를 합성하였으며, 합성된 복합체와 제올라이트 X에 대한 CO2 흡착 특성을 비교하였다. 합성된 시료의 결정도와 구조 형태는 X-선 회절분석(XRD)과 주사전자 현미경(SEM)으로 분석하였으며, 질소 흡/탈착 등온선으로부터 구한 비교면적과 기공 크기는 620 m(2)/g와 30 Å 이다. 제오카본의 CO2 흡착등온선에 Langmuir 모델, Langmuir-Freundlich 모델, Toth 모델을 적용한 결과 Langmuir-Freundlich 모델과 Toth 모델이 평균 상대 오차가 2% 이내로 잘 일치하였으며, 흡착평형 특성은 제올라이트 X의 결과와 유사하였다. CO2 흡착평형 데이터로부터 Clausius-Clapeyron식을 이용하여 구한 등량 흡착열은 제오카본의 경우 1.8~8 kcal/mol로서 제올라이트 X에 비하여 높았다.
Zeolite X/activated carbon composite(zeocarbon) was synthesized from rice hulls. The adsorption equilibrium of CO2 on zeocarbon was compared with that of zeolite X. The characterization for crystallinity and morphology of zeocarbon has been carried out by means of XRD and SEM. The specific surface area and pore size distributions of zeocarbon were calculated from the nitrogen adsorption/desorption isotherms. The synthesized material have shown specific surface area of 620 m(2)/g and BJH average pore diameter 30 Å. CO2 isotherms on zeocarbon and zeolite X were well fitted with Toth and Langmuir-Freundlich model within 2% average relative deviation. The isosteric heats of adsorption obtained from the adsorption equilibrium results of zeocarbon were in the range of 1.8~8 kcal/mol. It was about 50% higher than those of zeolite X.
Keywords:zeocarbon;zeolite X;adsorption;CO2
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