Interfacial area and gas-side mass transfer coefficient of a gas—liquid absorption column: pilot-scale comparison of various tray types

The method of gas—liquid absorption with chemical reaction was applied to determine the interfacial area and the gas-side mass transfer coefficient and implemented in a pilot column of diameter 0.45 m. This absorber was equipped successively with different trays of industrial type (bubble-cap, sieve...

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Bibliographic Details
Published in:Chemical engineering and processing 1990, Vol.27 (3), p.155-163
Main Authors: Peytavy, J.L, Huor, M.H, Bugarel, R, Laurent, A
Format: Article
Language:English
Subjects:
Absorption, stripping
Applied sciences
Chemical and Process Engineering
Chemical engineering
Engineering Sciences
Exact sciences and technology
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Summary:The method of gas—liquid absorption with chemical reaction was applied to determine the interfacial area and the gas-side mass transfer coefficient and implemented in a pilot column of diameter 0.45 m. This absorber was equipped successively with different trays of industrial type (bubble-cap, sieve and valve trays), so that a reliable comparison of their respective efficiencies could be made. The influence of weir height was studied especially, and also the effects of gas velocity and liquid load. The experimental results were correlated by means of empirical relations which account for the respective influences of the three parameters and provide a useful basis for extrapolation to industrial absorber design. En mettant en oeuvre la méthode d'absorption gaz—liquide avec réaction chimique, on a déterminé l'aire interfaciale et le coefficient de transfert de matière côté gaz d'une colonne pilote de 0,45 m de diamètre. Cette colonne a été successivement équipée de différents plateaux de type industriel (à calottes, perforés et à clapets) permettant ainsi une comparaison sûre de leur efficacité respective. L'influence de la hauteur de barrage a été spécialement étudiée en plus des effets de la vitesse du gaz et de la charge de liquide. Les résultats expérimentaux ont été corrélés sous forme de relations empiriques qui rendent compte des influences respectives des trois paramètres et qui fournissent une bonne base en vue de l'extrapolation au dimensionnement d'absorbeurs industriels.
ISSN:0255-2701
1873-3204
DOI:10.1016/0255-2701(90)87004-3