II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-34
EXPERIMENTAL ESTIMATION OF PORES VOLUME
OF CARBON BLACK AGGREGATES
Razdiakonova G.I., Dugnova Y.V.
Institute of Hydrocarbons Processing SB RAS, Omsk, Russia
e-mail: uglerod@ihpp.okno.ru
The spherical particles growth in dispersed carbon synthesis from hydrocarbons is
accompanied by their conglomeration and carbonizing with obtaining of indivisible
aggregates, as it is shown in the electron-microscopic pictures.
With the increase of aggregate size its secondary branching occurs, and polydispersity of
aggregates on the sizes is accompanied with their polymorphism. At application of dispersed
carbon as filler of rubbers pore volume inside the aggregates stands as container mechanically
protected from deformations of rubber [1]. This fact is important for filler intensifying action.
It is necessary to know the size, surface, pore volume and their differential characteristics
for porous texture description of dispersed carbon aggregate. True value of voidage in the
dispersed carbon aggregate has been calculated as difference of volume occupied by the
dispersed carbon aggregate (hydrodynamic) and its firm basis (optical) which were measured
by screen analysis [2] and particles size laser spectrometer – analyzer SALD 2001
(SHIMADZU) [3].
In this report the capability of pore volume estimation inside dispersed carbon aggregates
by the simple experimental method – titration with viscous liquid dibutylphthalate (DBP) – is
shown. At DBP rubbing in dispersed carbon powder to the end point visually fixed at the
time of the powder gathering in monolithic mass, sorption space is filled up both inside and
outside of aggregate. Taking packing density of the aggregates irrespective of their form and
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