Abstract
The opportunities of pulsed NMR methods for studying the mobility of adsorbed molecules and porous structure of microporous rigid and non-rigid adsorbents of different nature are considered. The distribution of nuclear magnetic relaxation times were used to determine the distribution of water and benzene molecules adsorbed in active carbons and in polymer sorbents. The dimensions of the areas corresponding to different porosities have been estimated from the self-diffusion data of water and benzene in AC. The self-diffusion study of water and benzene in the synthetic opals indicate the existence of ultramicropores. The obtained data of nuclear magnetic relaxation and self-diffusion of the adsorbed water and benzene in the different adsorbents are in accordance with the adsorption investigations and complement them.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
REFERENCES
S.J. Gregg, and K.S.W. Sing, Adsorption, Surface Area and Porosity, 2nd ed. (Academic Press, New York, 1982).
M.M. Dubinin, Microporous structures and adsorption properties of carbonaceous adsorbents, Carbon 21(4), 359–366 (1983).
H.F. Stoeckli, P. Rebstein, and L. Ballerini, On the assessment of microporosity in active carbons; a comparison of theoretical and experimental data, Carbon 28, 907–909 (1990).
R.Sh. Vartapetyan, and A.M. Voloshchuk, The mechanism of adsorption of water molecules on carbon adsorbents, Russian Chemical Reviews 64, 985–1001 (1995).
R.Sh. Vartapetyan, A.M. Voloshchuk, A.A. Isirikyan, N.S. Polyakov, and Y.I. Tarasevich, Chemistry of carbon surface and mechanism of water molecule adsorption, Colloids and Surfaces A 101, 227–232 (1995).
G.Sh. Gogelashvili, R.Sh. Vartapetyan, D.V. Ladychuk, Yu.B. Grunin, and E.V. Khozina, Specific features of the adsorption and nuclear magnetic relaxation of water molecules in active carbons: 1. Relation between the spin-spin relaxation of adsorbed water molecules and structural parameters of microporous active carbons, Colloid. J. 65, 545–551 (2003).
V.V. Mank, and N.I. Lebovka, Spectroscopy of nuclear magnetic resonance of water in heterogeneous systems (Naukova Dumka, Kiev, 1988) (in Russian).
F. D’Orazio, J.C. Tarcson, W. Halperin et al., Application of nuclear magnetic resonance pore structure analysis to porous silica glasses, J. Appl. Phys. 65, 742–751 (1989).
K.R. Brownstein, and C.E. Tarr, Spin-lattice relaxation in a system governed by diffusion, J. Magn. Reson. 26, 17–24 (1977).
K.R. Brownstein, and C.E. Tarr, Importance of classical diffusion in NMR studies of water in biological cells, Phys. Rev. A 19, 2446–2453 (1979).
W.E. Kenyon, Nuclear magnetic resonance as a petrophysical measurements, Nuclear Geophysics 6, 153–171 (1992).
R.L. Kleinberg, W.E. Kenyon, and P.P. Mitra, Mechanism of NMR relaxation of fluids in rocks, J. Magn. Reson. Ser. A 108, 206–214 (1994).
S. Godefroy, J.-P. Korb, M. Fleury, and R.G. Bryant, Surface nuclear relaxation and dynamics of water and oil in macroporous media, Phys. Rev. E 64, 21605–21618 (2001).
D. Chang, and M.A. Ioannidis, Magnetization evolution in network models of porous rock under conditions of drainage and imbition, J. Coll. Int. Sci. 253, 159–170 (2002).
J. Karger, and D.M. Ruthven, Diffusion in Zeolites and other Microporous Solids (John Wiley, New York, 1992).
F. Stallmach, and J.Karger, The potentials of pulsed field gradient NMR for investigation of porous media, Adsorption 5, 117–133 (1999).
E.V. Khozina, R.Sh. Vartapetian, and D.Sh. Idiyatullin, Features of nuclear magnetic relaxation of water and benzene molecules during absorption on activated carbons and estimation of pore size distribution in adsorbents, Russ. Chem. Bull. 51, 2036–2043 (2002).
R.Sh. Michail, S. Brunauer, and E.E. Bodor, Investigations of a complete pore structure analysis: I. Analysis of micropores, J. Colloid. Int. Sci. 26, 45–53 (1968).
H.Y. Carr, and E.M. Purcell, Effects of diffusion on free precession in nuclear magnetic resonance experiments, Phys. Rev. 94, 630–638 (1954).
S. Meiboom, and D. Gill, Modified spin-echo method for measurement of nuclear relaxation times, Rev. Sci. Instr. 29, 688–691 (1958)
A.N. Ainscough, and D. Dollimore, Adsorption capacity of molecular sieve type carbons, Langmuir 3, 708–713 (1987).
G.Sh. Gogelashvili, R.Sh. Vartapetyan, D.V. Ladychuk, Yu.B. Grunin, and E.V. Khozina, Specific features of the adsorption and nuclear magnetic relaxation of the water molecules in active carbons: 2. The state of water in active carbon with relatively large pores according to the NMR relaxation data, Colloid. J. 66, 271–276 (2004).
R.Sh. Vartapetyan, A.M. Voloshchuk, N.A. Limonov, and Yu.A. Romanov, Bimodal micropore size distribution in active carbons, Russian Chemical Bull. 42(3), 424–427 (1993).
R.Sh. Vartapetyan, A.M. Voloshchuk, A.K. Buryak, C.D. Artamonova, R.L. Belford, P.J. Ceroke, D.V. Kholine, R.B. Clarkson, and B.M. Odintsov, Water vapor adsorption on chars and active carbons - oxygen sensors prepared from a tropical tree wood, Carbon 43(10), 2152–2159 (2005).
R.Sh. Vartapetyan, E.V. Khozina, M.P. Tsyrupa, and V.A. Davankov, Mobility of Benzene and Water Molecules in Highly Crosslinked Polystyrene Adsorbents, Russian Journ. of Phys. Chem. 76(9), 1523–1531 (2002)
A.I. Maklakov, V.D. Skirda, and N.F. Fatkullin. Self-diffusion in Polymer systems in: Encyclopedia of Fluid Mechanics, vol. 9., edited by N.P. Cheremisinoff (Gulf- Publishing CO, Houston, 1999) pp. 705–745.
E.V. Khozina, R.Sh. Vartapetyan, and A.M. Voloshchuk, Specific features of self diffusion of molecules of water and benzene in active carbons, Colloid. J. 59, 230–235 (1997).
R.Sh. Vartapetyan, E.V. Khozina, and I.I. Bardyshev, Self-diffusion of water and benzene molecules adsorbed in the synthetic opal samples, Appl. Magn. Res. 29(3), 471–480 (2005).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer
About this paper
Cite this paper
VARTAPETYAN, R., KHOZINA, E. (2006). THE POROUS STRUCTURE OF HARD AND DEFORMED ADSORBENTS AND MOBILITY OF ADSORBED MOLECULES. In: Loureiro, J.M., Kartel, M.T. (eds) Combined and Hybrid Adsorbents. NATO Security through Science Series. Springer, Dordrecht . https://doi.org/10.1007/1-4020-5172-7_36
Download citation
DOI: https://doi.org/10.1007/1-4020-5172-7_36
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-5170-8
Online ISBN: 978-1-4020-5172-2
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)