Advertisement

Adsorption

, Volume 2, Issue 4, pp 317–321 | Cite as

The effects accompanying passing current through a granular bed of activated carbon

  • Y. I. Shumyatsky
  • M. B. Alekhina
Article

Abstract

Repeatedly passing current of high intensity (2 A) in the pulsing mode through a granular bed of activated carbon was accompanied by changes of bed resistance. These changes did not diminish when the current stopped but proceeded during 2 to 10 days of exposure.

X-ray lattice parameters of the carbon before and after it was subjected to numerous current pulses have been measured. The second sample differed considerably because it was more amorphous. Nitrogen and water adsorption isotherms on these samples have been measured. They showed a reduction of specific surface area (volume of micropores) and probably an increase of the average diameter of mesopores.

The observed significant changes of carbon texture and structure are explained by inductive electromechanical interactions between planar layers of carbon atoms in microcrystallites of activated carbon during pulses of passing current.

Keywords

activated carbon characterization of properties regeneration 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Alekhina, M.B., Y.I. Shumyatsky, E.A. Skubak, and S.G. Savchenco, “Correlation Between Electrical and Physical Properties and Structure Parameters of SKT Activated Carbon,”ZhPKh,66, 1811–1817 (1993).Google Scholar
  2. Bourrat, H., “Electrically Conductive Grades in Carbon Black: Structure and Properties,”Carbon,31, 287–302 (1993).Google Scholar
  3. Dubinin, M.M., “Porous Structures and Adsorption Properties of Active Carbons,”Chemistry and Physics of Carbon,2, 51–122 (1966).Google Scholar
  4. Emmerich, F.G., J.C. de Sousa, I.L. Torriani, and C.A. Luengo, “Application of a Granular Model and Percolation Theory to The Electrical Resistivity of Heat Treated Endocarp of Babassy Nut,”Carbon,25, 417–424 (1987).Google Scholar
  5. Hernandez, J.G., I. Hernandez-Calderon, C.A. Luengo, and R. Tsu, “Microscopic Structure and Electrical Properties of Heat Treated Coals and Eucalyptus Charcoal,”Carbon,20, 201–205 (1982).Google Scholar
  6. Khrenkova, T.M. and V.I. Kasatochkin, “Electrophysical Properties of The Transitive Carbon Forms,”Structural Chemistry of Carbon and Coals, V.I. Kasatochkin (Ed.), pp. 88–97, Nauka, Moscow, 1969.Google Scholar
  7. Kolyshkin, D.A. and K.K. Mikhailova,Activated Carbons, Khimia, Leningrad, 1972.Google Scholar
  8. Radeke, K.H., K.O. Backhaus, and A. Swaitkowski, “Electrical Conductivity of Activated Carbons,”Carbon,29, 122–123 (1991).Google Scholar
  9. Shulepov, S.V.,Physics of Carbon-Graphite Materials, Metallurgia, Moscow, 1972.Google Scholar
  10. Shwartzman, A.S., A.M. Rutman, V.A. Ermolaev, and A.S. Fialkov, “Comparative Analysis of Structural Distinctions of Industrial Carbon Black According to Their Incorrected X-Rayograms,”ZhPKh,59, 353–360 (1986).Google Scholar
  11. Vartapetyan, R. Sh. and A.M. Voloshchuk, “Adsorption Mechanism of Water Molecules on Carbon Adsorbents,”Uspekhi Khimii (Russian Chemical Reviews),64, 1055–1072 (1995).Google Scholar

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Y. I. Shumyatsky
    • 1
  • M. B. Alekhina
    • 1
  1. 1.Department of Inorganic Substances TechnologyMendeleyev University of Chemical Technology of RussiaMoscowRussia

Personalised recommendations