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Comparison of by-product gas composition by activations of activated carbon

  • Gi Bbum Lee
  • Jung Eun Park
  • Sang Youp Hwang
  • Ji Hyun Kim
  • Seokhwi Kim
  • Ho Kim
  • Bum Ui HongEmail author
Original Article
  • 6 Downloads

Abstract

In this study, commercial activated carbons (ACs) were upgraded by different activation methods, and the gases generated during the activations were defined and quantified. The chemical activation commonly applied for upgrading ACs uses complex reactions, involving pyrolysis, physical, and chemical reactions. The ACs based on wood materials were characterized by elemental analysis, N2 physisorption, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed desorption mass spectrometry. The patterns and composition of the generated gases were analyzed by gas chromatography and X-ray diffraction; high-resolution scanning electron microscopy was also used to characterize the activated carbon. The AC was mostly decomposed to CO2 by pyrolysis and physical activation, while CO was mainly detected during chemical activation from the K2CO3 produced by the reactions between CO2 and K2O. The detected amounts of generated gases were differed at various KOH ratios and residence times. The highest surface area obtained in this study was 2000 m2/g at the optimum ratio of AC and KOH (1:2).

Keywords

Activated carbon Potassium hydroxide Pyrolysis Physical activation Chemical activation Gas 

Notes

Acknowledgements

This study was supported by the Energy Development Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, republic of Korea (Project No. 20162010104680), and also the National Research Foundation of Korea(NRF) and the Center for Women In Science, Engineering and Technology(WISET) Grant funded by the Ministry of Science and ICT under the Program for Returners into R&D.

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Copyright information

© Korean Carbon Society 2019

Authors and Affiliations

  • Gi Bbum Lee
    • 1
  • Jung Eun Park
    • 1
  • Sang Youp Hwang
    • 1
  • Ji Hyun Kim
    • 1
  • Seokhwi Kim
    • 1
  • Ho Kim
    • 1
  • Bum Ui Hong
    • 1
    Email author
  1. 1.Department of Plant EngineeringInstitute for Advanced EngineeringYonginKorea

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