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  • 1
    Electronic Resource
    Electronic Resource
    Interpretation of water isotherm hysteresis for an activated charcoal using stochastic pore networks (1995)
    Springer
    Adsorption 1 (1995), S. 253-264 
    Details
    ISSN: 1572-8757
    Keywords: water isotherms ; isotherm hysteresis ; activated charcoal ; pore size distribution ; pore networks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Water vapor adsorption equilibria on activated carbons typically exhibit hysteresis. The size and shape of the hysteresis loop which separates the adsorption and desorption branches is a strong function of the pore size and interconnectivity of the pores. Neither conventional pore filling models nor statistical thermodynamics approaches provide a means for predicting the extent of hysteresis from only adsorption measurements. This work uses the Kelvin Equation in conjunction with the structural concept of a stochastic pore network to describe measured water isotherms on BPL carbon. Using a pore segment distribution function determined from the adsorption branch, it is shown that totally random assemblies underestimate the extent of hysteresis. It is possible, however, to closely fit the measured BPL-water hysteresis loop using a patchy heterogeneity in which a proportion of the larger pores are preferentially located on the exterior, mid-range pores are concentrated in a sub-surface layer and some large pores form shielded voids behind much smaller pores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00704227
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hot purge gas regeneration of adsorption beds with solute condensation: Experimental studies (1985)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 1322-1328 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Activated carbon beds with adsorbed n-octane are regenerated using hot air. Effects of pressure, feed temperature, and initial loading on temperature and concentration breakthrough curves are studied. For moderate and high values of these variables, effluent vapors are found to be saturated with hydrocarbon during part of the heating step, indicating the presence presence of liquid within the bed. Regeneration behavior is predicted with reasonable accuracy using a nonisothermal stage model.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690310811
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal regeneration of adsorption beds: Equilibrium theory for solute condensation (1984)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 30 (1984), S. 679-682 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690300429
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    Paper (German National Licenses)
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