ISSN 1070-4272, Russian Journal of Applied Chemistry, 2016, Vol. 89, No. 7, pp. 1102−1108. © Pleiades Publishing, Ltd., 2016.
Original Russian Text © V.N. Solovei, E.A. Spiridonova, V.V. Samonin, E.D. Khrylova, M.L. Podvyaznikov,
2016, published in Zhurnal Prikladnoi Khimii, 2016,
Vol. 89, No. 7, pp. 908−915.
AND ION EXCHANGE PROCESSES
Synthesis of Spherically Shaped Granulated Carbon Sorbent
V. N. Solovei, E. A. Spiridonova, V. V. Samonin*, E. D. Khrylova, and M. L. Podvyaznikov
St. Petersburg State Technological Institute (Technical University), Moskovskii pr. 26, St. Petersburg, 190013 Russia
Received April 1, 2016
Abstract—New technological procedure for obtaining spherical carbon sorbents was considered. The method
is based on oil granulation in the technology of coal beneﬁ cation. The coal dust of 2SS brand and coal tar were
used to obtain spherical activated carbons with high sorption and strength characteristics. The inﬂ uence exerted
by the introduction of surfactants in the course of molding on the quality parameters of activated carbons was
examined. The basic physicochemical and sorption characteristics of the carbons being developed were analyzed
and it was shown that spherical carbon adsorbents with micropore volume of up to 0.31 cm
strength of up to 91% can be obtained.
Activated carbons (ACs) belong to the most promising
modern sorption materials whose wide application ﬁ eld
is due to their unique adsorption and physicomechanical
properties. Recently, the consumption of ACs in Russia
has been steadily increasing due to the rapidly growing
production scale and high ecological requirements.
More than 70% of the Russian market demand for
AC is satisﬁ ed by the import. In recent years, the AC
manufacturing technology has been gradually going along
the slow improvement way, whereas the high demand
for effective sorbents becomes especially topical in our
country. In the current situation, appearance of new kinds
of carbon sorbents and extension of the assortment of the
existing materials will solve the problem.
One of ways to create high-efﬁ ciency sorbents is
by improvement of the technological foundations of
obtaining molded carbon sorbents , e.g., by using the
method of liquid granulation of carbons. This method was
ﬁ rst developed under the name “trent process” or “oliﬂ oc
process” in the United States as long ago as 1920s in order
to extract coal dust from mineral industry wastes strongly
contaminated with mineral impurities. This process was
aimed to reduce the ash content (to beneﬁ cate) fossil
coals, utilize dust coal for power generation purposes,
improve the coke capacity, perform hydrotransport of
coal, regenerate the slime water from coal plants, and
dehydrate ﬁ nely dispersed coals [2–5].
The liquid granulation process consists in a lyophilic
interaction between dispersed particles of the solid phase
and a binder in the lyophobic low-viscosity medium under
the conditions of strong turbulization of the mixture .
When a three-phase system of this kind is agitated, solid
particles form spherical granules.
The subject of our study was to form technological
foundations for obtaining spherical molded carbon
sorbents by the liquid granulation method.
In the ﬁ rst stage of the study, we examined the limits of
the process by performing preliminary experiments under
widely varied conditions. Because the principal goal of
the present study was to improve the existing production
of granulated coals, all the preliminary experiments were
performed on systems whose composition nearly fully
corresponded to the raw-material components used to
obtain industrial granulated activated carbons, e.g., of
the AG-3 and AG-5 type: coal dust of 2SS brand and an
industrial binder, coal tar.
As the main factors determining the applicability
limits of the liquid granulation process were chosen the