II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-40
SYNTHESIS AND INVESTIGATION OF HETEROCARBON SUPPORTS AND
CATALYSTS ON THEIR BASE FOR OXIDATION-REDUCTION REACTIONS
Surovikin Yu.V., Tsyrulnikov P.G., Surovikin V.F., Shlyapin D.A.,
Tsekhanovich M.S., Likholobov V.A.
Institute of Hydrocarbons Processing, Omsk, Russia
e-mail: suruv@ihpp.okno.ru
The catalytic properties are determined by grain size distribution and dispersion of active
component supported on carbon carrier. In one’s turn, the distribution and dispersion depends
in considerable extent on the support texture and surface chemistry.
Carbon materials surface can be characterized by acid or basic groups and be hydrophilic
or hydrophobic. The quantity and strength of these groups depend on the synthesis conditions.
But, as a rule, the origin groups of carbon surface: carboxyl, phenol, lactonic, etc whiсh fix
initially the precursor molecules, are hold them very weakly. Therefore the bond of these
groups with precursor molecules is break on the heat treatment stages. Commonly it is
accompanied by thermolysis of precursor molecules and the very surface groups.
As the result the migration of precursor molecules or formed intermediates occurred with
the following their collisions and sintering.
By this the dispersion of active component sharply reduces and it leads to the activity
decrease.
It is known the high porous oxide supports (Al 2 O 3 , SiO 2 and others) interact strong with
supported precursor molecules preventing their consequent sintering upon heat treatment
stages. Therefore it was important to improve the carbon supports properties by introducing in
their composition inorganic polar groups in order to stabilize strongly the precursor molecules
on the support pore surface.
Besides, it is worth to note that today assortment of porous carbon materials and their
quality do not satisfy the customers in such parameters as mechanical strength and stability in
aggressive media. In this connection the purposeful synthesis of porous carbon materials of
special design as adsorbents and as catalyst supports is actual for chemical and petrochemical
processes.
In this work the technology of matrix synthesis of catalyst supports on the base of
dispersive and pyrolitic carbon is realized [1].
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