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  • zeolite  (2)
  • Springer  (2)
  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Evaluation of energy distribution on a heterogeneous surface from heat of adsorption and its application to the ammonia/Na-Y zeolite system (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 838-841 
    Details
    ISSN: 1435-1536
    Keywords: Energy distribution ; heterogeneous surface ; heat of adsorption ; zeolite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Theε—θ function (energy level function) which represents surface heterogeneity was derived from theq—θ function (experimental heat function) in the case of reversible adsorption. The Langmuir equation was extended and applied to the procedure of calculations. An iterative calculation led to the most probableε—θ function by setting theq—θ function and adsorption temperature. As an example for actual cases, theε—θ function of Na-Y zeolite was calculated from theq—θ function obtained by the measurement of heats of adsorption of ammonia at 373 K. Theε—θ function thus derived seemed to be consistent with the positional distribution of sodium ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412962
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  • 2
    Electronic Resource
    Electronic Resource
    Validity of energy distribution derived from heat of adsorption in an ammonia/cation-exchanged Y zeolite system (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 445-448 
    Details
    ISSN: 1435-1536
    Keywords: Heat of adsorption ; energy distribution ; zeolite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The validity ofε-Θ functions (energy level functions) which were derived from experimentalq-Θ functions (heat functions) was examined in an ammonia/cation-exchanged Y zeolite system. Theε-Θ functions of Na-Y zeolite and Cs-Na-Y zeolite were respectively calculated from theirq- Θ functions measured by ammonia adsorption at 373 K. The heat of adsorption of ammonia was also measured on a mixture of these two zeolites at a certain mixing ratio at 373 K. Theε-Θ function of the mixture was likewise calculated on the basis of this measurement. Theε-Θ function thus calculated was in good agreement with the synthesizedε-Θ function derived by linearly combining twoε-Θ functions of each zeolite mentioned above. Theε-Θ function derived from experimentalε-Θ function thus proved to be valid in an actual adsorption system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419549
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    Paper (German National Licenses)
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