Page 12 - Gas Adsorption Equilibria
P. 12
PREFACE
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.
Both, traditional and new measurement methods for gas adsorption
equilibria are presented in Chaps. 2-6 and elucidated by quite a number of
experimental data sets, most of them having been measured in our
laboratories. Special emphasis is given to uncertainties of data and pros and
cons of all measurement methods are given to the best of our knowledge. Also
the basic concepts underlying interpretation of measurements and calculations
of adsorbed masses from measurement signals, are discussed in Chap. 1.