This book is intended to present for the first time experimental methods to measure equilibria
states of pure and mixed gases being adsorbed on the surface of solid materials. It has been
written for engineers and scientists from industry and academia who are interested in
adsorption based gas separation processes and or in using gas adsorption for characterization
of the porosity of solid materials. This book is the result of a fruitful collaboration of a
theoretician (JUK) and an experimentalist (RS) over more than twelve years in the field of gas
adsorption systems at the Institute of Fluid- and Thermodynamics (IFT) at the University of
Siegen Siegen Germany. This collaboration resulted in the development of several new methods
to measure not only pure gas adsorption but gas mixture or coadsorption equilibria on inert
porous solids. Also several new theoretical results could be achieved leading to new types of
so-called adsorption isotherms based on the concepts of molecular association and -
phenomenologically speaking - on that of thermodynamic phases of fractal dimension. Naturally
results of international collaboration of the authors over the years (1980-2000) also are
included.
