Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Natural Gas Sorption Using Activated-Carbon with Surface Treatment

활성탄의 표면처리에 의한 천연가스 흡장

  • Yun, Seok-Min (Department of Fine Chem. & Chemistry, Chungnam National University) ;
  • Kim, Ju-Wan (Department of Nanotechnology, Chungnam National University) ;
  • Im, Ji-Sun (Department of Nanotechnology, Chungnam National University) ;
  • Kim, Shin-Dong (Department of Fine Chem. & Chemistry, Chungnam National University) ;
  • Hong, Ji-Sook (Korea Research Institute of Chemical Technology) ;
  • Suh, Jeong-Kwon (Korea Research Institute of Chemical Technology) ;
  • Lee, Young-Seak (Department of Fine Chem. & Chemistry, Chungnam National University)
  • Published : 2006.12.15
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Abstract

In this study, activated carbon(ACs) have been modified by nitric acid and heat-treatment. The surface and structure properties of ACs were determined by BET surface area, FT-IR pH and acid/base value. The changes in pore structure and surface properties of these modified ACs were correlated with natural gas adsorption which measured by volumetric apparatus at $0^{\circ}C$ and $25^{\circ}C$. The pore textural properties of activated carbon was also characterized by nitrogen adsorption at 77 K. Specific surface area and micropore volume of them were calculated by Langmuir equation and Horvath-Kawazoe method, and chemical properties of surface were measured by FT-IR and titration of acid and base solutions. Pore texture of activated carbons after treatments were not significantly changed. Total acidity increased and basicity of samples decreased. however the basicity increased with heat treatment. The methane adsorption of ACs become different depending on the acid/base value of samples.

Keywords

References

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