Barothermal preparation and characterization of micro-mesoporous activated carbons: textural studies,
thermal destruction and evolved gas analysis with TG-TPD-IR technique
Vitaliy E. Diyuk1, Ruslan T. Mariychuk2, Vladyslav V. Lisnyak1
1
Taras Shevchenko National University of Kyiv, Chemical faculty, 64, Volodymyrska Str.,
UA-01601 Kyiv, Ukraine, E-mails: vdiyuk@gmail.com (V.E.D.), lisnyak@univ.kiev.ua (V.V.L.);
Tel/fax: +380442581241
2
University of Prešov in Prešov, Faculty of Humanities and Natural Sciences, Department of Ecology, 01,
17th November Str., SK-08116 Prešov, Slovakia, E-mail: ruslan.mariychuk@unipo.sk (R.T.M.)
Journal of Thermal Analysis and Calorimetry
Supplementary material
A QSDFT model developed for slit-shaped pores geometry (NOVAWin2 software, Quantachrome Instruments) was
employed to characterize pore size distributions of ACs. N2 carbon adsorption branch kernel at 77 K based on a slitpore model (pore diameter < 2 nm) and cylindrical pore model (pore diameter > 2 nm) recommended for micromesoporous carbons with heterogeneous surface chemistry was applied at the calculations.
Fig. S1 Typical adsorption isotherms of the initial AC and ACs treated with H2O2 at various conditions,
see the main text of the article for the samples assignment.
Fig. S2 The dependence of log(a) against (log(ps/p))2 for the initial AC, AC obtained by traditional
wet treatment with H2O2 and ACs obtained by barothermal treatment with H2O2 vapors
1 2
) (log( ps / p)) 2 , where a is the amount of adsorption
The DR equation is given as log(a)  log(aDR )  2.303(RTEDR
–1
–1
(mol g ) at the relative pressure (p ps ) and aDR is saturated amount of adsorption, respectively, EDR is the
characteristic adsorption energy. The dependence log(a) on (log(ps/p))2 was used to calculate the volume of
micropores VDR (intercept) and determined the characteristic adsorption energy, from a slope on the graph, for
different samples. The values, which are obtained for EDR (5.8–6.0 kJ mol–1) are fairly typical for N2 adsorption on
activated carbons. Reliable parameter, which is defined by the Dubinin-Radushkevich’s equation, is the volume of
micropores. In order to determine the microporous surface (SDR), as a rule, one can use the equation SDR = aDRNA,
where NA is the Avogadro's number, and  is the cross-sectional area of N2, or other similar equations. Hence, these
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equations are not accounted filling of the micropores volume, as a consequence, a certain value of SDR determined
from the D-R equation cannot be considered valid.
TPD-MS spectroscopy of gas probes
(a)
(b)
(c)
(d)
(e)
(f)
Fig. S3 Typical TPD-MS spectra of AC for different temperature (a–f). The molecular fragments of HO+ (m/z = 17),
H2O+(m/z = 18), CO+(m/z = 28) and CO2+(m/z = 44) were detected
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