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• W2047284775 abstract "Rates of mass transfer at air sparged fixed beds of stacked screens were measured by an electrochemical technique. Variables studied were air superficial velocity, physical properties of the solution and bed thickness. The liquid mass transfer coefficient was found to increase with air superficial velocity up to a certain point and then remain almost constant with further increase in velocity. The increase in the mass transfer coefficient as a result of air sparging ranged from 2.8 to 10 times the natural convection value depending on the operating conditions. Increasing bed thickness was found to decrease the mass transfer coefficient at a given air superficial velocity. Mass transfer data at fixed beds were correlated by the equation: j = 0.268 (Re · Fr)−0.25 (L/d)−0.35. For a single horizontal screen the data were correlated by the equation: j = 0.275 (Re · Fr)−0.21. Nous avons mesurá par une technique álectrochimique les vitesses de transfert de matiàre pour des lits fixes composás de tamis superposás aspergás à l'air. Les variables suivantes ont átá átudiáes: vitesse superficielle de l'air; propriátás physiques de la solution; ápaisseur du lit. II apparaǐt que le coefficient de transfert de matiàre augmente avec la vitesse superficielle de l'air jusqu'à un certain point, puis reste presque constant lorsque la vitesse augmente davantage. L'augmentation du coefficient de transfert de matiàre causá par l'aáration forcáe, est selon les conditions opáratoires, de 2, 8 à 10 fois la valeur du coefficient obtenu avec un rágime de convection naturelle. De měme, une augmentation de l'ápaisseur du lit diminue le coefficient de transfert de matiàre à une vitesse superficielle de l'air donnáe. Les donnáes de transfert de matiàre ont átá corráláes par l'áquation: j = 0, 268 (Re · Fr)−0.25(L/d)−0.35 Pour un tamis horizontal simple, les donnáes ont átá corrtltes par l'áquation: j = 0, 275 (Re · Fr)−0.21" @default.
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• W2047284775 date "1988-06-01" @default.
• W2047284775 modified "2023-10-18" @default.
• W2047284775 title "Effect of gas sparging on the rate of mass transfer at fixed beds of horizontally stacked screens" @default.
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• W2047284775 doi "https://doi.org/10.1002/cjce.5450660323" @default.
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