Thermodynamics of adsorption. Part I.—General considerations
Thermodynamics of adsorption. Part I.—General considerations
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吸附热力学。第一部分——一般考虑
DOI:
10.1039/tf9504600453
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发表时间:
1950
影响因子:
--
通讯作者:
D. H. Everett
中科院分区:
文献类型:
--
作者:
D. H. Everett
As a preliminary to a more detailed study of the thermodynamics of adsorption, the genera1 methods of approach are discussed and it is concluded that a procedure closely akin to that employed in studying solutions is the most convenient both from the standpoint of analysis of experimental results and from that of theoretical interpretation.1. Introduction.-An exact and at the same time useful thermodynamic treatment of adsorption of vapours by solids cannot be developed without assumptions as to the nature of the adsorbed phase. The various methods of approach differ in their choice of characteristic thermodynamic functions and in this paper we shall discuss their relative merits. This preliminary discussion is the more important since Hill has recently examined this problem and reached conclusions with which we do not entirely agree. We consider that thermodynamic methods virtually identical with those employed in studying solutions are the more convenient and proceed in Part I1 to apply these methods to the localized monolayer and non-localized monolayer models of the adsorbed phase. In Part I11 we shall present the results of an analysis of experimental data in terms of the methods outlined in Part 11. The main objects of these papers are (a) to stress that the mathematical forms of various adsorption isotherm equations can be derived on the basis of different physical models, and hence to point out that measurement of isotherms at one temperature can never distinguish conclusively between the various possible models;(b) to evaluate the thermodynamic quantities characterizing adsorption equilibria by analysis of isotherms cbtained at several temperatures, and so obtain information on the nature of the