Author
M. M. Dubinin
Other affiliations: Hungarian Academy of Sciences, National Academy of Sciences of Ukraine, Academy of Sciences of the Czech Republic
Bio: M. M. Dubinin is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Adsorption & Zeolite. The author has an hindex of 11, co-authored 221 publications receiving 778 citations. Previous affiliations of M. M. Dubinin include Hungarian Academy of Sciences & National Academy of Sciences of Ukraine.
Papers published on a yearly basis
Papers
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TL;DR: In the case of weakly expressed electrostatic interactions, the adsorption on zeolites is closest in nature to adsorptions on microporous adsorbents, which do not contain active centers in the form of cations.
Abstract: 1.
Synthetic zeolites of various compositions and crystal chemical structures differ extremely substantially in average density in the adsorption space of the cations accessible for direct interaction with the molecules being adsorbed, and in their number for a unit mass of the adsorbent. This determines the limiting cases of adsorption with a weakly or strongly expressed role of the electrostatic component in the total adsorption interaction.
2.
The volume nature of the filling of the micropores of the zeolite and, in a satisfactory approximation, the temperature invariance of the characteristic equation of adsorption, are the experimental bases for the theory of the adsorption of gases and vapors on zeolites.
3.
In the case of weakly expressed electrostatic interactions, the adsorption on zeolites is closest in nature to adsorption on microporous adsorbents, which do not contain active centers in the form of cations in the adsorption space.
280 citations
TL;DR: In this paper, the results of experimental study into the kinetics of adsorption of vapors of n-pentane by zink chloride active carbon Supersorbon, of benzene by active carbons with molecular-sieve properties, of water by active carbon MSC-5A, and of methanol by potassium sulphide active carbon SK using the gravimetric method at constant adsorptive pressure.
85 citations
TL;DR: In this paper, the role of the molecular sieve effect in characterization of microporous structures is estimated and the effect of the similarity factors β on the calculated degree of adsorption is considered.
49 citations
TL;DR: In this article, the potential theory of adsorption of gases and vapors developed in the laboratory of the Institute of Physical Chemistry, Academy of Sciences, USSR, is presented.
Abstract: 1.
The present state of the potential theory of adsorption of gases and vapors developed in the laboratory of sorption processes of the Institute of Physical Chemistry, Academy of Sciences, USSR, is presented.
2.
The possibilities of the theory for describing and predicting adsorption equilibria and differential heats of adsorption are demostrated.
3.
The theory is applicable to the adsorption of gases and vapors on adsorbents of various chemical natures and porous structures with the condition that the dispersion component plays the determining role in the adsorption interaction.
48 citations
TL;DR: In this paper, the adsorption isotherms of nitrogen, krypton, xenon, tetrafluoroethylene and hexafluoropropylene were studied over a wide temperature interval, including the critical region, with two specimens of active carbon which belonged to the extreme members of the series of active carbons of the first structural type.
Abstract: 1.
The adsorption isotherms of nitrogen, krypton, xenon, tetrafluoroethylene and hexafluoropropylene were studied over a wide temperature interval, including the critical region, with two specimens of active carbon which belonged to the extreme members of the series of active carbons of the first structrual type.
2.
As a result of the analysis of experimental data and of the examination of the peculiarities of the state of adsorbed substances in the region of the critical temperature, rational methods of calculation were proposed for the characteristic curve from adsorption isotherms of the substances in gaseous and vapor states.
3.
In accord with the potential theory of adsorption, the affinity coefficients of the characteristic curves do not depend on the structure of the carbon, while the limiting volumes of the adsorptional space are constant magnitudes for each active carbon, provided that the effect of ultraporosity is not manifested.
4.
Equations of the adsorption isotherms for active carbons of the first structural type were proposed for gaseous and vapor states of the substances being adsorbed in the equilibrium space phase, these equations corresponding to the same equation of the characteristic curve. These equations of adsorption isotherms were supported experimentally.
27 citations
Cited by
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TL;DR: This review presents in brief the history of adsorption and highlights the progress in theoretical description of the phenomenon under consideration, as well as presenting some of the latest important results and giving a source of up-to-date literature on it.
1,799 citations
TL;DR: Criteria for choosing the optimum isotherm model is established through a critical review of different adsorption models and the use of various mathematically error functions such as linear regression analysis, nonlinear regressionAnalysis, and error functions for adsorption data optimization.
1,151 citations
TL;DR: A theoretical basis and guiding methodology for the selection and use of the adsorption isotherms is provided and a user interface was developed based on Excel software for solving the isotherm models.
689 citations
Book•
01 Nov 1988TL;DR: In this article, a unified approach to physica adsorption of heterogeneous solids is presented, where the fundamental integral equation for Langmuir's local isotherm and different energy distributions are discussed.
Abstract: A unified approach to physica adsorption of heterogeneous solids is presented. In the case of single-gas adsorption the overall adsorption isotherms, derived by solving the fundamental integral equation for Langmuir's local isotherm and different energy distributions, are discussed. These isotherm equations are extended for Fowler-Gugaenheim and BET local adsorption isotherms. Moreover, the overall isotherms for single-gas adsorption are generalized for mixed-gas adsorption, adsorption from solutions of non-electrolytes and multi-solute adsorption from dilute solutions. The last section of this paper is devoted to the kinetics of localized adsorption of cases, the gas and liquid mixtures on energetically heterogeneous solid surfaces.
578 citations
TL;DR: In this paper, the authors compared the performance of cavities with ordered nanoporous materials with cubic Pm3n (SBA-1, HMM-3), cubic Im3m (S BA-16), and 3D hexagonal P63/mmc cagelike structures, and showed that in sufficiently small cavities (pore diameters 3 ca. 6 nm), the condensation step corresponds to the theoretical limit of the metastable adsorption film.
Abstract: Adsorption in spherical cavities is studied by the nonlocal density functional theory (NLDFT). Theoretical results are compared with experimental data on ordered nanoporous materials with cubic Pm3n (SBA-1, HMM-3), cubic Im3m (SBA-16), and 3D hexagonal P63/mmc (SBA-2, SBA-12) cagelike structures. Quantitative comparison shows that capillary condensation of N2 at 77 K in sufficiently small cavities (pore diameters 3 ca. 6 nm, the capillary condensation step corresponds to the theoretical limit of stability of the metastable adsorption film. For pores wider than ca. 10 nm, this limit is approximated by the macroscopic Derjaguin−Broekhoff−de Boer equations. Desorption from cavities of >6 nm is controlled by the size of the windows that connect the cavity with the bulk fluid. If the diameter of the window is below ca. 4 nm, desorp...
492 citations