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.
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