International Union of Pure and Applied Chemistry Physical Chemistry Division Commission on Colloid and Surface Chemistry including Catalysis* Reporting Physisorption Data for Gas/solid Systems with Special Reference to the Determination of Surface Area a
International Union of Pure and Applied Chemistry Physical Chemistry Division Commission on Colloid and Surface Chemistry including Catalysis* Reporting Physisorption Data for Gas/solid Systems with Special Reference to the Determination of Surface Area a
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通讯作者：
S. W. H. Sing;R. A. W. Everett;L. Haul;Netherlands Moscou;R. Pierotti;J. Rouquerol;France;
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作者：
S. W. H. Sing;R. A. W. Everett;L. Haul;Netherlands Moscou;R. Pierotti;J. Rouquerol;France;
本报告书可予再版，而毋须经联合大学及应用化学联合会（JUPAC）正式批准，惟须印上一份确认书，并附有参考全文及联合大学及应用化学联合会版权标志（© 1985 JUPAC）。翻译成另一种语言的出版物必须事先获得相关JUPAC国家坚持组织的批准。本手册的目的有两个：第一，提请注意在报告气体吸附（物理吸附）数据方面出现的问题和含糊之处;第二，为程序和术语的标准化提出建议，这将导致普遍接受的业务守则。解释物理吸附等温线的第一步是确定等温线的类型，从而确定吸附过程的性质：单层-多层吸附、毛细管冷凝或毛细管填充。如果等温线是I型或III型，BET法不可能得到实际表面积的值;但II型和IV型等温线通常都适用于BET分析，条件是C值既不太低也不太高，并且BET图在包含点B的等温线区域内是线性的。只有当等温线为IV型时，中孔尺寸分布的计算才有效，但是考虑到大多数孔系统的复杂性，通过应用精细的计算方法几乎得不到什么。如果I型等温线在高相对压力下表现出几乎恒定的吸附，则吸附体积由平台处的吸附量给出。目前，还没有可靠的程序可用于计算从一个单一的等温线的粒度分布。推荐一个检查表，以帮助作者在测量吸附等温线和介绍的数据在主要文献。
Republication of this report is permitted without the need for formal JUPAC permission on condition that an acknowledgement, with full reference together with JUPAC copyright symbol (© 1985 JUPAC), is printed. Publication of a translation into another language is subject to the additional condition of prior approval from the relevant JUPAC National Adhering Organization. The purpose of this Manual is twofold: first to draw attention to the problems and ambiguities which have arisen in connection with the reporting of gas adsorption (physisorption) data; second to formulate proposals for the standardisation of procedures and terminology which will lead to a generally accepted code of practice. The proposals are based on, and are in general accordance with, the Manual of Symbols The first stage in the interpretation of a physisorption isotherm is to identify the isotherm type and hence the nature of the adsorption process(es): monolayer-multilayer adsorption, capillary condensation or micropore filling. The BET method is unlikely to yield a value of the actual surface area if the isotherm is either Type I or Type III; but both Type II and Type IV isotherms are, in general, amenable to the BET analysis, provided that the value of C is neither too low nor too high and that the BET plot is linear in the region of the isotherm containing Point B. The computation of mesopore size distribution is valid only if the isotherm is of Type IV, but in view of the complexity of most pore systems little is to be gained by the application of an elaborate method of computation. If a Type I isotherm exhibits a nearly constant adsorption at high relative pressure, the micropore volume is given by the amount adsorbed at the plateau. At present there is no reliable procedure available for the computation of the micropore size distribution from a single isotherm. A check list is recommended to assist authors in the measurement of adsorption isotherms and the presentation of the data in the primary literature.