Page 26 - Gas Adsorption Equilibria

Introduction 11

and rear portions, this leading to inhomogeneous sorbate distributions
within the sample.

5. Calorimetry as a method to determine gas adsorption equilibria is not
considered here in view of excellent presentations of this field in the
literature [0.6, 0.37].

Summarizing we want to emphasize that measurement methods (1-4)
mentioned above do have certain advantages and hence potential for further
development, especially if one is interested in the kinetics of the gas
adsorption process. Hence, only future developments in experimental
techniques and theory will show which method can best serve the needs of
adsorption science and technology.

As a final remark we would like to draw reader’s attention to some
neighboring fields of gas adsorption on solid surfaces which for obvious
reasons could not be encountered here, namely

adsorption from liquid phases on solid surfaces,
adsorption from gases or liquids on the surface of another liquid,
adsorption of biomolecules, especially proteins on synthetic or
organic membranes and
ion exchange phenomena between fluid and solid phases.

Introductory and review articles of all these areas can be found in the
literature [0.13, 0.38] which is recommended especially to the young reader’s
attention.

REFERENCES

[0.1] Le Van D. M.
Adsorption Processes and Modeling:
Present and Future, article in Fundamentals of Adsorption 6 (FOA6),
F. Meunier, Ed., p. 19-29, Elsevier, Paris etc., 1998.
[0.2] Rodriguez-Reinoso F., Mc Enaney B., Rouquerol J., Unger K.
Characterization of Porous Solids VI, Proceedings of the 6th Int. Symposium on the
Characterization of Porous Solids, (COPS-VI), Alicante, May 2002, Studies in
Surface Science and Catalysis, Vol. 144 Elsevier, Amsterdam etc., 2002.