Liquid—liquid mass transfer in systems agitated by submerged jets

✍ Scribed by D. Blakely; W.J. Davies; W.J. McManamey; S.K.S. Multani

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 785 KB
• Volume: 32
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(77)80242-x

✦ Synopsis

Mass transfer across a plane Interface has been mvestlgated for hquld-hqmd systems, with the hqtnd phases agitated by vertrcally opposed, submerged Jets, one m each phase Mass transfer coeffictents were determmed for the systems ethyl acetate-water and butanol-water, and for the transfer of dissolved hehum between water and toluene, and toluene between toluene and water The latter two solutes provided a wide range of molecular dtiuslon coefiiclents When turbulent eddles penetrated to the Interface the mass transfer coefficients were found to be proportional to Da5, and could be represented by the Levlch-Davies mass transfer model for mass transfer between turbulent hqulds The charactenstlc turbulence velocmes m this model were related to the velocltles of the hqmds from the Jet nozzles, and to the equipment dlmensmns (e g the distances of the jets from the Interface, the radius of the vessel and the diameters of the Jet nozzles) by an expresslon based on the hydrodynamic behavlour of Jets For the low mterfaclal tenslon system butanol-water, a flat disc had to be placed m the Interface at the regon of Jet Impmgement, to prevent disrupt&on of the mterface, but, even so, only a hmlted range of Jet flow rates could be used Only at the highest flow rates were turbulent condltlons obtamed, and most of the expenmental mass transfer coefficients for this system were between the values predlcted by the Levlch-Davies model and the Levlch "three-zone" model for boundary layer flow