Rotational freedom of adsorbed molecules. Comments

1975 ◽  
Vol 79 (8) ◽  
pp. 856-857 ◽  
Author(s):  
D. M. Ruthven
Keyword(s):  
Adsorbed Molecules ◽  
Rotational Freedom

CHARCOAL SORPTION STUDIES: III. THE ADSORPTION OF ETHYLENE AND PERFLUOROETHYLENE BY AN ACTIVATED CHARCOAL

1955 ◽  
Vol 33 (2) ◽  
pp. 320-329 ◽  
Author(s):  
H. L. McDermot ◽  
J. C. Arnell ◽  
B. E. Lawton
Keyword(s):  
Activated Charcoal ◽  
Adsorbed Molecules ◽  
Absolute Entropy ◽  
Heats Of Adsorption ◽  
Molecular Weights ◽  
The Absolute ◽  
The Difference ◽  
Adsorbed Ethylene ◽  
Rotational Freedom

The adsorption of ethylene and perfluoroethylene by an activated charcoal has been measured over a range of temperatures. Integral and differential heats have been calculated and compared for the two gases. The heats of adsorption of perfluoroethylene are consistently higher than those of ethylene, but only by an amount to be expected from the difference in molecular weights. The absolute entropy of adsorbed ethylene has been calculated and found to be in agreement with a model in which the adsorbed molecules are mobile and possess at least two degrees of rotational freedom.

Adsorption of organics on thermally treated solids obtained from colloidal silica

1987 ◽  
Vol 52 (3) ◽  
pp. 572-581 ◽  
Author(s):  
Miroslav M. Kopečni ◽  
Slobodan K. Milonjic ◽  
Wladyslaw Rudzinski ◽  
Jacek Jagiello
Keyword(s):  
Gas Chromatography ◽  
Thermodynamic Parameters ◽  
Adsorption Isotherms ◽  
Colloidal Silica ◽  
Adsorption Properties ◽  
Thermal Pretreatment ◽  
Lateral Interactions ◽  
Adsorbed Molecules ◽  
Temperature Range ◽  
Thermally Treated

Adsorption isotherms of three adsorbates on the solid beads obtained from colloidal silica were determined by means of gas chromatography at low surface coverages, when lateral interactions between the adsorbed molecules are negligible. The influence of thermal pretreatment on the adsorption properties of the solids was investigated in the temperature range from 343 to 423 K, while the solids were heated between 523 K and 1 223 K. The thermodynamic parameters of adsorption have been determined and used to discuss the adsorbate-adsorbent interactions.

Influence of temperature on the infrared spectra of adsorbed molecules

1971 ◽  
Vol 12 (1) ◽  
pp. 45-48
Author(s):  
Yu. M. Shchekochikhin ◽  
A. A. Davydov ◽  
Yu. S. Tarasevich ◽  
N. P. Keier
Keyword(s):  
Infrared Spectra ◽  
Adsorbed Molecules ◽  
Influence Of Temperature ◽  
Influence Of Temperature On
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