Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Pure and Binary Gases Adsorption Equilibria of CO2/CO/CH4/H2 on Li-X Zeolite

Li-X 제올라이트에서의 CO2/CO/CH4/H2 단일성분 및 혼합성분의 흡착평형

  • Park, Ju-Yong (Environment & Process Technology Division, Korea Institute of Science and Technology) ;
  • Yang, Se-il (Environment & Process Technology Division, Korea Institute of Science and Technology) ;
  • Choi, Do-Young (Environment & Process Technology Division, Korea Institute of Science and Technology) ;
  • Jang, Seong-Cheol (Environment & Process Technology Division, Korea Institute of Science and Technology) ;
  • Lee, Chang-Ha (Department of Chemical Enginnering, Yonsei University) ;
  • Choi, Dae-Ki (Environment & Process Technology Division, Korea Institute of Science and Technology)
  • 박주용 (한국과학기술연구원 에너지 환경 연구부) ;
  • 양세일 (한국과학기술연구원 에너지 환경 연구부) ;
  • 최도영 (한국과학기술연구원 에너지 환경 연구부) ;
  • 장성철 (한국과학기술연구원 에너지 환경 연구부) ;
  • 이창하 (연세대학교 화학공학과) ;
  • 최대기 (한국과학기술연구원 에너지 환경 연구부)
  • Received : 2007.08.29
  • Accepted : 2007.10.25
  • Published : 2008.02.28
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Abstract

Adsorption equilibria of the gases $CO_2$, CO, $CH_4$ and $H_2$ and their binary mixtures on Li-X zeolite (UOP) were obtained by static volumetric method in the pressure range of 0 to 20 bar at temperatures of 293.15, 303.15, and 313.15 K. Using the parameter obtained from single-component adsorption isotherm. Multicomponent adsorption equilibra could be predicted and compared with experimental data. Extended Langmuir isotherm, Extended Langmuir-Freundlich isotherm (L-F) and dual-site Langmuir isotherm (DSL) were used to predict the experimental results for binary adsorption equilibria of $H_2/CO_2$, $H_2/CO$, and $H_2/CH_4$ on Li-X Zeolite. Extended Langmuir-Freundlich isotherm predicted equilibria of $CH_4$ and $H_2$ better than any other isotherm. One the other hand DSL isotherm predicted equilibria of $CO_2$ and CO very well.

흡착제 Li-X 제올라이트(UOP)에서 $CO_2$, CO, $CH_4$, $H_2$에 대한 단일성분 및 혼합성분의 흡착평형 실험을 정적부피법에 의해 수행하였다. 실험 데이터는 압력범위 0~20 bar와 온도범위 293.15 K, 303.15 K, 313.15 K에서 실시하였다. 각각 등온식의 파라미터들은 단일성분 실험을 통해 결정했고, 결정한 파라미터로 혼합성분의 흡착 평형을 예측하였으며 실험값과 비교하였다. Li-X 제올라이트에서의 $H_2/CO_2$, $H_2/CO$, $H_2/CH_4$ 혼합성분의 흡착평형 실험 결과는 extended langmuir-freundlich(L-F) 등온식, dual-site langmuir(DSL) 등온식을 이용해 예측하였으며 실험값과 비교하였다. L-F 등온식은 다른 모델들에 비해 $CH_4$와 $H_2$에서 좋은 예측 결과를 보여주었다. 또한 DSL 등온 식은 $CO_2$와 CO에서 좋은 예측 결과를 보여주었다.

Keywords

Acknowledgement

Supported by : 산업자원부, (주)SK

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