XRD Characterization of the Structure of Graphites and Carbon Materials Obtained by the Low-Temperature Graphitization of Coal Tar Pitch

  • Ch. N. Barnakov Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy 18, 650000, Kemerovo, Russia
  • G. P. Khokhlova Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy 18, 650000, Kemerovo, Russia
  • A. N. Popova Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy 18, 650000, Kemerovo, Russia
  • S. A. Sozinov Kemerovo Scientific Centre SB RAS, pr. Sovietsky, 18, 650000, Kemerovo, Russia
  • Z. R. Ismagilov Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy 18, 650000, Kemerovo, Russia
Keywords: 2,4-dichlorophenoxyacetic acid Raman scattering bentonite clay carbon nanotubes combustion conversion flaring gel polymer-clay composites modification morphological structure nanoparticles nitrogen petroleum gases polymer-clay composition re-entry space pollution supercapacitors swelling degree synthesis, intercalation thermites worked-off stages

Abstract

The structure of some commercial graphites and carbon materials (CMs) obtained by the low-temperature catalytic graphitization of coal tar pitch with iron salt, needle coke, foamed graphite as the catalysts has been studied. The study was performed using the X-ray diffraction technique with reflections from base plane and their decomposition into two components corresponding to the structural phases of graphite which have different XRD characteristics. Various CMs were compared with respect to the structural phase ratio, distance between polyarene layers in these phases, and sizes of the coherent scattering regions. The (004) reflection provided a better fit of some properties of graphites to the calculated XRD characteristics as compared to calculation from the (002) reflection. In the case of carbonization of coal tar pitch with investigated catalyst additions, prepared carbon materials have a higher degree of graphitization and a crystallite size greater than in the other case of carbonization of the individual pitch. The highest catalytic activity is shown by foamed graphite. It was found that the use of foamed graphite as the catalyst at 800-900 ºC produced carbon materials possessing a crystalline structure with interplanar spacing close to that in commercial graphites, while in the absence of catalyst the coal tar pitch material has an amorphous structure.

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Published
2015-04-10
How to Cite
[1]
C. Barnakov, G. Khokhlova, A. Popova, S. Sozinov, and Z. Ismagilov, “XRD Characterization of the Structure of Graphites and Carbon Materials Obtained by the Low-Temperature Graphitization of Coal Tar Pitch”, Eurasian Chem.-Technol. J., vol. 17, no. 2, pp. 87-93, Apr. 2015.
Section
Articles

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