II International Symposium on Carbon for Catalysis ABSTRACTS

KL-4
The strong mesoporous carbons were produced by pyrolysis and activation of cedar
nutshells at the selected conditions. The optimal process parameters of wood wastes
(hydrolytic lignin, bark, sawdust) integrated carbonization-activation in a catalytic fluidized
bed were selected in order to produce the powdery active carbons.
Microporous and mesoporous carbons from natural graphites and anthracites
The low reactivity of natural graphites and anthracites limits their use for porous carbons
production.
The influence of chemical modification of de-ashing natural graphites and anthracites of
different deposits on the formation of their microporosity at the further steps of thermal
treatments was investigated. Data about structural and textural characteristics of intercalated
and thermally exfoliated samples of Zavalevsky and Kyshtymsky graphites were obtained
with the use of powder X-ray diffraction, SEM and HREM methods and from isotherms of
nitrogen and carbon dioxide adsorption.
It was found that the applied method of intercalation makes the significant influence on
the nano-textural characteristics of exfoliated graphite. Depending on the intercalation
conditions the BET surface area of the thermally expanded graphites varies from 12 up to
70 m 2 /g an the pore volume from 0,08 to 0,55 cm 3 g.
Carbon supports from Donetsky anthracite (Progress mine) were prepared by consecutive
steps of demineralization, chemical modification by HClO 4 and final activation by CO 2 or
water-steam at temperature 1123 o C. Depending on conditions of modification and activation
the porosity of carbon products ranges from microporous to mesoporous types and their
specific surface area varies from 400 to 1000 m 2 /g.
Palladium catalysts on carbon supports from plant polymers, natural graphites and
anthracites
Palladium catalysts were prepared by an impregnation of the carbon supports with a
water-alcohol solution of H 2 PdCl 4 .
The size and shape of the supported palladium particles and their distribution over the
carbon surface were found to depend on the method of the carbon support preparation.
The narrow distribution of the pores width in the fiber carbon support from carbonized
cellulose promotes the formation of homogeneous distribution of palladium particles with size
4-5 nm on the carbon surface.
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