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Dynamic Flow Method

  • S. Lowell
  • Joan E. Shields
  • Martin A. Thomas
  • Matthias Thommes
Part of the Particle Technology Series book series (POTS, volume 16)

Abstract

In 1951, Loebenstein and Deitz [1] described an innovative gas adsorption technique that did not require the use of a vacuum. They adsorbed nitrogen out of a mixture of nitrogen and helium that was passed back and forth over the sample between two burettes by raising and lowering attached mercury columns. Equilibrium was established by noting no further change in pressure with additional cycles. The quantity adsorbed was determined by the pressure decrease at constant volume. Successive data points were acquired by adding more nitrogen at the system. The results obtained by Loebenstein and Deitz agreed with vacuum volumetric measurements on a large variety of samples with a wide range of surface areas. They were also able to establish that the quantities of nitrogen adsorbed were independent of the presence of helium.

Keywords

Thermal Diffusion Relative Pressure Desorption Isotherm Desorption Peak Porous Solid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Loebenstein W.V. and Deitz V.R. (1951) J. Res. Nat. Bur. Stand. 46, 51.CrossRefGoogle Scholar
  2. 2.
    Nelson F.M. and Eggertsen F.T. (1958) Anal. Chem. 30, 1387.CrossRefGoogle Scholar
  3. 3.
    de Boer J.H. (1953) The Dynamical Character ofAdsorption, Oxford University Press, London, p33.Google Scholar
  4. 4.
    Karp S. and Lowell S. (1971) Anal. Chem. 43, 1910.CrossRefGoogle Scholar
  5. 5.
    Karp S., Lowell S. and Mustaccuiolo A. (1972) Anal. Chem. 44, 2395.CrossRefGoogle Scholar
  6. 6.
    Kourilova D. and Krevel M. (1972) J. Chromat. 65, 71.CrossRefGoogle Scholar
  7. 7.
    Lowell S. and Karp S. (1972) Anal. Chem. 44, 1706.CrossRefGoogle Scholar
  8. 8.
    Lowell S. (1973) Anal. Chem. 45, 8.CrossRefGoogle Scholar
  9. 9.
    Benson S.W. (1960) The Foundation ofChemicalKinetics, McGraw-Hill, New York, p188.Google Scholar
  10. 10.
    Quan tachrome Instruments, Boynton Beach, FL.Google Scholar

Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • S. Lowell
    • 1
  • Joan E. Shields
    • 2
  • Martin A. Thomas
    • 1
  • Matthias Thommes
    • 1
  1. 1.Quantachrome InstrumentsBoynton BeachUSA
  2. 2.C.W. Post Campus of Long Island UniversityUSA

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