Principles of adsorption

17-0-01 - Liquid-solid and solid-solid phase transitions of oxygen in a single cylindrical pore 

Department of Chemistry, Okayama University of Science, Okayama, morishi chem.ous.ac.jp, Japan 

To study the liquid-solid and solid-solid phase transitions of a confined O2, we performed X-ray diffraction measurements of O2 confined inside the cylindrical pores of six kinds of regular mesoporous adsorbents (MCM-41 and SBA-15) with different pore radii as a function of temperature. Hysteresis effects between the y-to-(3 and p-to-y solid-solid phase transitions are considerably larger than those between freezing and melting and the depression of the P-to-y transition point is slightly smaller than that of the melting point. 

17-0-02 - Structural study of benzene, tetrachloroethene and trichloro-ethene sorbed phases in silicalite-1 

17-0-03 - Molecular ordering of the adsorbed phase within the microporous model aluminophosphate AIPO4-II at cryogenic temperatures 

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R. Masel, Principles of Adsorption and Reaction on Solid Surfaces, Wiley-Interscience, New York, 1996. 

Solid bed dehydration systems work on the principle of adsorption. Adsorption involves a form of adhesion between the surface of the solid desiccant and the water vapor in the gas. The water forms an extremely thin film that is held to the desiccant surface by forces of attraction, but there is no chemical reaction. The desiccant is a solid, granulated drying or dehydrating medium with an extremely large effective surface area per unit weight because of a multitude of microscopic pores and capillary... 

L R Snyder, Principles of Adsorption Chromatography, Marcel Dekker, New York, 1968... 

Fig. 4 Coupling the separation principles of adsorption and partition chromatography.

Tswett s initial column liquid chromatography method was developed, tested, and applied in two parallel modes, liquid-solid adsorption and liquid-liquid partition. Adsorption ehromatography, based on a purely physical principle of adsorption, eonsiderably outperformed its partition counterpart with mechanically coated stationary phases to become the most important liquid chromatographic method. This remains true today in thin-layer chromatography (TLC), for which silica gel is by far the major stationary phase. In column chromatography, however, reversed-phase liquid ehromatography using chemically bonded stationary phases is the most popular method. 

Principles of Adsorption Chromatography The Separation of Nonionic Organic Compounds, Lloyd R. Snyder Multicomponent Chromatography Theory of Interference,... 

D. M. Ruthven, Principles of Adsorption and Adsorption Processes, Wiley, New York, 1984. 

R.I. Masel, Principles of Adsorption and Reaction on Solid Surfaces, Wiley, New York, 1996 [51 J.B. Hudson, Surface Science An Introduction, Wiley, New York, 1998. 

Hint Use an approach of partitioning, and a principle of adsorption additivity (overall adsorption is the sum of adsorption over accessible support and active component surfaces). 

Ruthven DM (1984) Principles of adsorption and adsorption processes. Wiley, New York... 

Readers interested in a definitive treatment of linear adsorption chromatography should consult the book Principles of Adsorption Chromatography by L. R. Snyder (2). Although written a decade ago, the book contains an extensive and still entirely valid presentation of the subject and forms one of the main sources used in writing this article. 

L.R. Snyder, Principles of Adsorption Chromatography, Arnold, London, U.K./Marcel Dekker, New York, 1968 L.R. Snyder, J.J. Kirkland, An Introduction to Modem Liquid Chromatography, 2nd edn., Wiley-Interscience, New York, 1979. 

Schofield Phil. Mag. March, 1926) has recently verified this relation by direct experiment. In order to appreciate the significance of this result, it is necessary to consider in more detail the electrical potential difference V and the manner in which it arises. Instead of regarding the phenomenon from the point of view of the Gibbs equation, it has been, until recently, more usual to discuss the subject of electro-capillarity from the conceptions developed by Helmholtz and Lippmann. These views, together with the theory of electrolytic solution pressure advanced by Nemst, are not in reality incompatible with the principles of adsorption at interfaces as laid down by Gibbs. 

R. I. Masel Principle of adsorption and reaction on solid surfaces. John Wiley and Sons, 1996. 

BASIC PRINCIPLES OF ADSORPTION AND ION EXCHANGE 4.1.1 Adsorption materials... 

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