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
D. H. Everett
中科院分区:
--
文献类型:
--
作者:
D. H. Everett

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作为一个初步的吸附热力学的更详细的研究,general1方法的方法进行了讨论,并得出结论,一个程序密切类似于研究解决方案是最方便的,无论是从实验结果的分析和理论解释的角度来看。介绍。如果不假定被吸附相的性质,就不能对固体吸附蒸汽进行精确而又有用的热力学处理。各种方法的不同之处在于它们的特征热力学函数的选择,在本文中,我们将讨论它们的相对优点。这一初步讨论更为重要,因为希尔最近审查了这一问题,并得出了我们不完全同意的结论。我们认为,热力学方法几乎相同的研究解决方案中所采用的是更方便,并继续在第一部分将这些方法应用到本地化的单层和非本地化的单层模型的吸附相。在第一部分中,我们将介绍根据第十一部分中概述的方法对实验数据进行分析的结果。这些论文的主要目的是:(a)强调各种吸附等温线方程的数学形式可以根据不同的物理模型导出,因此指出,在一个温度下测量等温线永远不能决定性地区分各种可能的模型;(B)通过分析在几个温度下获得的等温线来评估表征吸附平衡的热力学量,并因此获得关于
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