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Change in the Functional Composition of the Carbon Surface upon Water Vapor Activation

  • Sorption and Ion Exchange Processes
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Abstract

The method of mathematical processing of IR transmission spectra, which consists in estimating the changes in the absorption fraction of certain groups during the activation, was used to reveal weak systematic changes in the functional composition of the activated carbon surface. Analysis of the spectra of activated carbon samples prepared from bamboo stems and birch wood using this method has shown that activation is accompanied by condensation of aromatic nuclei, which leads to the formation of polyaromatic structures. To estimate the size of aromatic fragments, we calculated the ratio of the integrated intensity of the stretching vibration band of aromatic clusters at 1560 cm–1 to the integrated intensity of the vibration band of C–H bond at 870 cm–1. It is shown that an increase in the degree of burnout of charcoal upon activation is accompanied by an increase in the size of polycyclic aromatic structures.

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Authors and Affiliations

  1. Higher School of Technology and Energy, St. Petersburg State University of Technology and Design, 198095, St. Petersburg, Russia

    O. Yu. Derkacheva

  2. St. Petersburg State Forest Technical University, 194021, St. Petersburg, Russia

    D. A. Ponomarev, A. A. Spitsyn & Chu Kong Ng’i

Authors
  1. O. Yu. Derkacheva
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  2. D. A. Ponomarev
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  3. A. A. Spitsyn
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  4. Chu Kong Ng’i
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Contributions

O.Yu. Derkacheva performed registration and mathematical processing of IR spectra; D.A. Ponomarev prepared the article for publication; A.A. Spitsyn carried out the carbonization of the original bamboo; Chu Kong Ng’i prepared samples of the original plant material and carried out the activation of charcoal.

Corresponding authors

Correspondence to O. Yu. Derkacheva or D. A. Ponomarev.

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The authors declare that they have no conflicts of interest requiring disclosure in this article.

Additional information

Translated from Zhurnal Prikladnoi Khimii, No. 7, pp. 947–952, January, 2021 https://doi.org/10.31857/S0044461821070173

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Derkacheva, O.Y., Ponomarev, D.A., Spitsyn, A.A. et al. Change in the Functional Composition of the Carbon Surface upon Water Vapor Activation. Russ J Appl Chem 94, 996–1001 (2021). https://doi.org/10.1134/S1070427221070181

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  • DOI: https://doi.org/10.1134/S1070427221070181

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