Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 2, pp. 167−171.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © V.V. Samonin, V.Yu. Nikonova, M.L. Podvyaznikov, M.A. Abramova, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85,
No. 2, pp. 177−181.
AND INDUSTRIAL INORGANIC CHEMISTRY
Use of Fullerene Additions for Modiﬁ cation
of Chemical Absorbers
V. V. Samonin, V. Yu. Nikonova, M. L. Podvyaznikov,
and M. A. Abramova
St. Petersburg State Technological Institute (Technical University), St. Petersburg, Russia
Received May 12, 2011
Abstract—The characteristics of lime chemical absorber, both conventional and modiﬁ ed with fullerenes, were
examined under dynamic conditions (kinetic characteristics of the CO
uptake, water retention capacity, and pore
In our previous study  we showed that modiﬁ cation
with fullerenes causes signiﬁ cant enhancement of the
activity of adsorbents in various sorption processes.
Fullerenes  represent a new, recently discovered,
allotropic form of carbon with a peculiar structure and
thereby can strongly affect the properties of materials
modiﬁ ed by them, including bulk porous sorbents. For
example, modiﬁ cation with fullerenes can be successfully
applied to active carbons used for integrated treatment
of wastewater and potable water in water production.
Speciﬁ cally, the water treatment efﬁ ciency in terms
of removal of heavy metal cations and organic matter
increases by a factor of 2–4 and 1.3–2.5, respectively, and
coliform bacteria in water are completely destroyed [3–6].
We showed earlier [7, 8] that modiﬁ cation of zeolites
used for dearomatization of saturated hydrocarbons
causes the degree of dearomatization and the service life
of adsorbent to increase 1.5–2.0 times and thus can be
proﬁ tably used in petroleum reﬁ ning for puriﬁ cation of
It was also demonstrated  that the hydration be-
havior of inorganic materials is affected by fullerenes
introduced in their structure, e.g., via changing the amount
of mix water needed by cements modiﬁ ed with fullerenes.
Considering the above-said, we presumed that it would
be possible to increase the sorptive capacity for carbon
dioxide, exhibited by lime chemical absorber (LCA)
comprised of Ca(OH)
(96%) and NaOH (4%), via its
modiﬁ cation with microamounts of fullerenes.
As modifying addition served fullerenes extract C
unseparated fraction of fullerenes recovered from fuller-
ene soot . The additions were introduced in amounts of
0.01, 0.02, 0.04, and 0.06 wt% into the chemical absorber
in its preparation stage from aqueous solutions of fuller-
enes, which were stabilized by crown ethers.
The dynamic characteristics of the LCA were ex-
amined by determining the CO
content in air upstream
and downstream of the chemical absorber layer using an
The kinetic characteristics of the carbon dioxide
uptake by the LCA were determined by the following
procedure. A weighed portion (1 g) of the LCA was ex-
posed to a gas-air mixture (GAM) stream for 5, 10, 20,
30, and 35 min at the ﬂ ow rate per unit area of 0.3 and
0.014 l min
for air and carbon dioxide, respectively,
after which it was dried in a desiccator at 150°C for 1 h.
Simultaneously, the initial LCA was dried in order to
determine its water content.
The amount of carbon dioxide sorbed by the moment
τ was calculated by the formula
а = (С