Modified correlations for the first and second critical rotor speeds, as well as break up probability in a rotary disc contactor

Abstract

A rotary disc contactor with 9.1 cm inner diameter and 28 compartments has been used to investigate the effect of continuous phase height on the first and second critical rotor speeds, as well as breakage probability by using 12 different chemical systems, in case of mass transfer and no mass transfer. Three modified correlations have been proposed to predict the first and second critical rotor speeds as well as break up probability by considering physical properties, drop size, and continuous phase height. Furthermore, estimated results of the proposed correlations were compared to the randomly selected literature data.Un contacteurà disque rotatif de diamètre intérieur de 9,1cm et 28 compartiments aété utilisé pourétudier l'effet de la hauteur de phase continue sur la première et seconde vitesses critiques de rotor ainsi que sur la probabilité de défaillance mécanique en utilisant douze systèmes chimiques différents, en cas de transfert de masse et sans transfert de masse. Trois corrélations modifiées ontété proposées pour prédire les première et seconde vitesses critiques de rotor ainsi que la probabilité de défaillance mécanique en tenant compte des propriétés physiques, de la taille des gouttes et de la hauteur de phase continue. De plus, les résultats estimés ontété comparésà la littérature sélectionnée de façon aléatoire.Keywords: rotary disc contactor, drop breakage probability, the first critical rotor speed, the second critical rotor speed

A critical review on the use of nanoparticles in liquid–liquid extraction

“…Rotary disc contactors have attracted significant attention for liquid-liquid extractions due to their low driving power, high throughput, and high efficiency per unit height[108].Molavi et al [109]. studied droplet breakage in a rotary disc contactor in the presence of nanoparticles.They dispersed SiO 2 nanoparticles with two different degrees of hydrophobicity in the dispersed phase (butyl acetate).…”