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

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2019, 29(3), pp.263-272
  • DOI : 10.1007/s42823-019-00030-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : June 1, 2018
  • Accepted : March 9, 2019
  • Published : June 1, 2019

Lee Gi Bbum 1 Jung Eun Park 2 Hwang, Sang Youp 2 Kim Ji Hyun 2 Kim Seokhwi 1 Ho Kim 2 Bum-Ui Hong 1

1고등기술연구원
2고등기술연구원연구조합

Accredited

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).

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Total Citation Counts(KCI+WOS) (15) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (12) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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