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A. A. Pribylov I. A. Kalinnikova S. M. Kalashnikov G. F. Stoeckli 《Russian Chemical Bulletin》2000,49(4):692-700
The isotherms of excess adsorption of CH4 (atP=0.001–160 MPa), SF6 (atP=0.001–2.4 MPa), and C6H6 (atP=0.0001–0.1 MPa) on carbon adsorbents—microporous carbons CMS and FAS with developed mesoporosity and graphitized soot—were
measured in the 298–408 K temperature region. Calculation of the isotherms of absolute adsorption of the total content of
these substances requires knowledge of the adsorption volume, which was determined by different methods: by the Dubinin—Radushkevich
equation; by the experimental isotherm of excess adsorption and the equation of absolute adsorption; by the method using the
intersection of nonlinear isosteres of excess adsorption and isosteres of absolute adsorption; by the comparative plot of
values of the excess C6H6 adsorption ΓFAS—Γsoor; by the method using the difference of molecular radii of adsorptives and the surface of the specific adsorbent; and by the
calculation of the adsorption layer thickness using the FHH equation for mesoporous systems. The results of determination
of the adsorption volume for microporous systems of these carbons agree well with each other and with the passport data for
the adsorbents. Analysis of the results revealed the peculiarity of the sulfur hexafluoride adsorption related to the formation
of associates on the surface of the carbon adsorbents.
Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 4, pp. 688–696, April, 2000. 相似文献
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I. A. Kalinnikova A. A. Pribylov V. V. Serpinskii T. N. Ivanova S. M. Kalashnikov 《Russian Chemical Bulletin》1988,37(9):1756-1758
1. | It has been established experimentally that at 740 K and 90 MPa, approximately three molecules of N2 or O2 are adsorbed in a small cavity of NaA zeolite. |
2. | Analysis of the desorption curves indicates that for CsNaA zeolite (degree of exchange of Na+ by Cs+ 70%) it is impossible to distinguish quantitatively between adsorption in the large and the small cavities. |
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A. A. Pribylov S. Z. Muminov I. A. Kalinnikova L. G. Shekhovtsova O. K. Krasil’nikova 《Russian Chemical Bulletin》2013,62(10):2102-2108
Equilibrium adsorption of nitrogen, carbon dioxide, and argon was examined on the sodium and pyridinium forms of montmorillonite and on the hydrogen form of bentonite. The measurements were carried out at 303, 343, 373, and 400 K over pressure ranges of 0.1–90 MPa (Ar and N2) and 0.1–6 MPa (CO2). The amount of nitrogen vapor adsorbed was determined at 77 K and pressures from 0 to 0.1 MPa. The porous structure parameters of the studied samples were determined using adsorption isotherms of nitrogen, argon, and carbon dioxide vapors. At elevated temperatures and pressures >10 MPa, Ar and N2 adsorption processes on the Na-form of montmorillonite and Ar adsorption on bentonite are activated, since the amounts of the gases adsorbed and adsorption volumes increase with temperature. No activated adsorption is observed for carbon dioxide adsorption on these adsorbents. A comparison of the excess adsorption isotherms of gases on the Py-form of montmorillonite and H-form of bentonite shows that adsorption in micropores predominates for the Py-form of montmorillonite, whereas for the Na-form of bentonite and H-form of bentonite adsorption occurs mainly in meso- and macropores. 相似文献
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Conclusions From the experimental isotherm of adsorption on a zeolite, on the assumption of a quasiindependence of the molecules found in different cavities, it is possible to determine the distribution of the adsorbed molecules along the zeolite cavities. If the adsorption isotherm satisfies the Henry equation, then this distribution coincides with the Poisson distribution, while if it satisfies the Langmuir equation then the distribution coincides with the Bernoulli distribution.Translated from. Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 452–454, February, 1973. 相似文献
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I. A. Kalinnikova V. V. Serpinskii U. Noak M. Byulov 《Russian Chemical Bulletin》1983,32(9):1796-1801