II International Symposium on Carbon for Catalysis ABSTRACTS

KL-4
SYNTHESIS AND PROPERTIES OF CARBON SUPPORTS AND
PALLADIUM-CARBON CATALYSTS FROM NATURAL ORGANIC RAW
MATERIALS
Kuznetsov B.N.
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia
e-mail: bnk@icct.ru, inm@icct.ru
The rather high cost of synthetic carbon supports limits the scale of their application in
the industrial catalysis.
Some results of the study of structure and properties of carbon supports and
palladium-carbon catalysts produced with the use of natural graphites, anthracites and plant
polymers are presented in this lecture.
Mesoporous carbons from plant biomass
The influence of wood nature (larch, aspen, beech) pyrolysis and activation conditions on
the yield and the structure characteristics of produced chars and active carbons was
established. The nature of lignocellulosic material and pyrolysis conditions define the
distribution of solid, liquid and gaseous pyrolysis products, the porosity and reactive ability of
obtained chars. The larch wood gives the highest yield of char and active carbon as compared
with the other types of wood. The highest reaction ability in gasification processes was found
for the aspen charcoal.
The influence of copper and zinc ions introduced to lignocellulosic materials and
cellulose on the process of their carbonization and on the texture of obtained porous materials
was investigated. The increase of pyrolysis temperature up to 500-700 °C results in the
destruction of C-O-C bonds and generation of polycondensed aromatic systems.
Thermogravimetric analysis indicates a decrease of the start of thermal decomposition
process on 50 °C for metal-containing samples in the comparison with non-modified
cellulose. For original and Cu-modified samples of aspen wood and nutshell this difference
was only 15-20 °C. SEM-data indicate that the carbonaceous products keep a fibre structure
of the original cellulose. According to BET study the surface area of some metal-containing
porous carbons can reach 600 m 2 /g.
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