Absorption studies in the light of the penetration theory: I. Long wetted-wall columns
โ Scribed by S. Lynn; J.R. Straatemeier; H. Kramers
- Publisher
- Elsevier Science
- Year
- 1955
- Tongue
- English
- Weight
- 843 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0009-2509
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โฆ Synopsis
Snmmary
-The absorption of SO, by water and by aqueous solutions of IICl, NaHSOa and NaCl using relatively long wetted-wall columns (12 to 22 cm) with no gas phase m&t&x has been investigated. The results of the investigation show (1) that ln the presence of small concentrations of a surface active material (here TeepoZ, an alkyl sulphate wetting agent) the rate of absorption is very well predicted by the penetration theory, (2) that the primary function of the wetting agent is to prevent the formation of ripples in a falling fUm of the heiihta used and (9) that the hydrolysis reaction of the system SOS-Ha0 is very rapid relative to the contact times involved, so that absorption of SO, by water may be considered as physical absorption. The data obtainable with this type of absorber may be used to calculate a rather reliable value of the product C+ d/B in the case of physical absorption. If this product is known, the absorber may be used to study reaction rates in chemical absorption. R4sum4-On a &udic l'absorption de SOe pure dans l'eau et dam des solutions aqueu.ies de HCI, NaHSOs et NaCl avec une colonne B parois mouill&s. de 12 B 22 cm. de longueur. Lee experiences demontrent (1) qu'en pr&ence de faibles concentrations d'un detergent (Teepol) la vitesse d'absorption peut &tre pr6dite avec la theorie simple de diffusion non-stationnaire, (2) que la fonction primaire du detergent est de supprimer lea ondulations h la surface du liquide, et (8) que la r&action d'hydrolyse du sy&me SO*-Hz0 est tr6.r rapide aupr&s le.9 temps de contact utilis& (entre 0,l et 1 seconde). Pour l'absorption physique, des exp&iences dam un absorbeur comme utllisd ici peuvent fournir une valeur assex sure du produit C* db. Au cas ou cette valeur soit connue. l'absorbeur peut &re utilM pour Wtude de vitesses de r&action chex l'absorption avec r&action chimique.
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