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A computer-aided approach to the study of adsorbents

Walsh, David P.; (1992) A computer-aided approach to the study of adsorbents. Doctoral thesis (Ph.D), UCL (University College London). Green open access


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Carbonaceous adsorbents have many industrial and environmental and defence applications. A general quantitative measure of the factors influencing adsorbance on the carbon surface is vital if the most suitable adsorbent for a particular application is to be selected. In addition it would be useful to increase our understanding of the role of pore size and pore size distribution in the adsorption process, particularly its role in influencing adsorption under humid conditions. A microtechnique which combines Inverse Gas Chromatography (IGC) and computer analysis has been developed. The technique provides a convenient way of obtaining adsorbent partition data at infinite dilution for a range of adsorbates. The application of multiple linear regression, (MLR), and known adsorbate parameters to both this data and data obtained from the literature has provided characteristic descriptive equations for several carbon adsorbents. The partition data and the descriptive equations have been used to compare the carbonaceous adsorbents and have allowed the important factors influencing adsorption to be elucidated. The microtechnique has been used under humid conditions thus allowing the important influence of water on adsorption to be examined. Comparison of the descriptive equations under dry and humid conditions has revealed a possible mechanism for water adsorption and has also shown the overall effect of humidity on the factors influencing adsorption. Comparisons of the performances of the adsorbents under humid conditions have shown quite large differences that are not present when the adsorbents are compared under dry conditions. These differences in performance may have important implications for the application of these adsorbents in the future.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: A computer-aided approach to the study of adsorbents
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Thesis digitised by ProQuest.
Keywords: Applied sciences; Carbonaceous adsorbents
URI: https://discovery.ucl.ac.uk/id/eprint/10107678
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