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Adsorption of water vapour on activated alumina. I —‐ equilibrium behaviour
Author(s) -
Desai R.,
Hussain M.,
Ruthven D. M.
Publication year - 1992
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450700412
Subject(s) - physisorption , adsorption , chemisorption , water vapor , langmuir , chemistry , superposition principle , thermodynamics , langmuir adsorption model , mathematics , physics , organic chemistry , mathematical analysis
Equilbrium isotherms are reported for adsorption of water vapour on several different activated alumina adsorbents. The experimentally measured isotherms represent the sum of the contributions from water vapour held in several ways but these contributions can be resolved by detailed analysis. The individual isotherms conform closely to simple idealized models (Langmuir for chemisorption, BET for physisorption), thus providing a rational basis on which to compare different samples and the effects of different regeneration procedures. The apparent complexity in the behaviour of these systems arises from the superposition of the different contributions, the relative importance of which depends upon the nature of the sample and the regeneration conditions. By contrast, the behaviour of the resolved isotherms is relatively straightforward.