A B.E.T.-like three sorption stage isotherm

The statistical B.E.T.-treatment of multimolecular sorption is extended to include three distinct sorption stages, viz. (I) the strongly sorbed monolayer, (II) the following h-1 layers, much less strongly sorbed, and (III) the remaining layers, up to infinity, of 'pure liquid' characterist...

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Autor principal: Timmermann, E.O
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 1989
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100 1 |a Timmermann, E.O. 
245 1 2 |a A B.E.T.-like three sorption stage isotherm 
260 |c 1989 
270 1 0 |m Timmermann, E.O.; Departamento de Quimica Inorgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Nuñez, (1428) Buenos Aires, Argentina 
506 |2 openaire  |e Política editorial 
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504 |a Hill, T.L., (1952) Adv. Catal., 4, p. 211 
504 |a Gregg, S.J., Sing, K.S.W., (1967) Adsorption, Surface Area and Porosity, , Academic Press, New York 
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504 |a Langmuir, I., (1918) J. Am. Chem. Soc., 40, p. 1361 
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504 |a Anderson, R.B., Hall, K.W., (1948) J. Am. Chem. Soc., 70, p. 1727 
504 |a De Boer, J.H., (1953) The Dynamical Character of Adsorption, , Clarendon Press, Oxford 
504 |a Guggenheim, E.A., (1966) Application of Statistical Mechanicsclarendon Press, Oxford, , chap. 11 
504 |a Langmuir, I., (1918) J. Am. Chem. Soc., 40, p. 1375 
504 |a Van Der Berg, C., Bruin, S., (1981) Water Activity: Influence on Food Quality, 1. , ed. L. B. Rockland and G. F. StewardAcademic Press, New York 
504 |a Van Der Berg, C., (1985) Properties of Water in Foods, p. 119. , ed. D. Simatos and J. L. Multon, Martinus-Nijhoff, Dordrecht 
504 |a Stokes, R.H., Robinson, R.H., (1948) J. Am. Chem. Soc., 70, p. 1870 
504 |a Gascoyne, P.R.C., Pethig, R., (1977) J. Chem. Soc., Faraday Trans. 1, 73, p. 171 
504 |a Grigera, J.R., Berendson, H.J.C., (1979) Biopolymers, 18, p. 47 
504 |a Grigera, J.R., Mogilner, I.G., (1980) Indian Chem. Engineers, 22, p. 42 
504 |a Timmermann, E.O., (1970) Z. Phys. Chem. N.F., 72, p. 140 
504 |a Gregor, H.P., Sundheim, B.P., Held, K.M., Waxman, M.H., (1952) J. Colloid Sci., 7, p. 511 
504 |a Boyd, G.E., Soldano, B.A., (1953) Z. Electrochem., 57, p. 162 
504 |a Timmermann, E.O., (1970) Z. Phys. Chem. N.F., 70, p. 195 
504 |a Timmermann, E.O., (1982) J. Chem. Soc., Faraday Trans. 1, 78, p. 2619 
504 |a (1980) Water in Polymers, , ed. S. P. Rowland, Am. Chem. Soc. Symposium Series No. 127, Am. Chem. Society, Washington D.C 
504 |a Timmermann, E.O., Proc. 3Rd. Int. Meeting on Polymer Science and Technology, pp. 100-105. , 9-13th Nov. 1981, La Plata, Argentina 
504 |a Hill, T.L., (1956) Statistical Mechanics, , McGraw-Hill, New York 
504 |a Fowler, R.H., (1935) Proc. Camb. Phil. Soc. Math. Phys. Sci., 31, p. 260 
504 |a Cassie, A.B.D., (1945) Trans. Faraday Soc., 41, p. 450 
504 |a Hill, T.L., (1946) J. Chem. Phys., 14, p. 263 
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504 |a Jones, D.C., (1951) J. Chem. Soc., p. 126 
504 |a , p. 200. , Ref. 7, and fig. 10 and 14; Harkins, J.W., Jura, G., (1944) J. Am. Chem. Soc., 66, p. 919. , fig. 5 
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504 |a Ref. 12, table 1 and fig. 1; Robinson, R.H., Stokes, R.H., (1959) Electrolyte Solutions, p. 477. , Butterworth, London, App. 8.4, and App. 8.11, p. 510 
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504 |a Ref. 16, table 1 and fig. 1; Zettlemoyer, A.C., Micale, F.J., Klier, K., (1975) Water, a Comprehensive Treatise, 5. , ed. F. FranksPlenum Press, New York, chap. 5 
520 3 |a The statistical B.E.T.-treatment of multimolecular sorption is extended to include three distinct sorption stages, viz. (I) the strongly sorbed monolayer, (II) the following h-1 layers, much less strongly sorbed, and (III) the remaining layers, up to infinity, of 'pure liquid' characteristics. The new three sorption stages (t.s.s.) isotherm embodies the classical two-parameter B.E.T. equation [stages 1(h = 1)-III] as well as the three-parameter Guggenheim-Anderson-De Boer (G.A.B.) equation [stages I-II (h = ∞)]. The t.s.s. isotherm, which necessarily uses a fourth parameter, retains the mathematical form of the older isotherms with two correction functions determined by the new constant h (extension of stages I and II), functions which become important only at high relative activities of the sorbate. The sorption stage III is evidenced by experimental data in this region: here the G.A.B. isotherm demands that the inverse of the mass sorbed per unit mass of sorbent should be linear in p/p°, while experimentally a deviation downwards is found, which is explained by the t.s.s. isotherm. The four parameters, determined by versatile, easy to apply, graphical methods, show a certain correlation with the type of interactions characterizing the experimental systems. With longer ranged interactions the extent of the sorption stage II increases from h = 8-15 (gas/solids) to h = 15-20 (water/biopolymers) and to h = 20-25 (water/electrolytes-polyelectrolytes). The applicability range of the t.s.s. isotherm extends up to at least p/p° = 0.95.  |l eng 
593 |a Departamento de Quimica Inorgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Nuñez, (1428) Buenos Aires, Argentina 
773 0 |d 1989  |g v. 85  |h pp. 1631-1645  |k n. 7  |x 03009599  |w (AR-BaUEN)CENRE-78  |t Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases 
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856 4 0 |u https://doi.org/10.1039/F19898501631  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_03009599_v85_n7_p1631_Timmermann  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03009599_v85_n7_p1631_Timmermann  |y Registro en la Biblioteca Digital 
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