Study On The Shell-side Mass Transfer Of Hollow Fiber Renewal Liquid Membrane

Hollow fiber renewal liquid membrane (HFRLM) is a new type technique coupling extraction and stripping processes. The parameter of the hollow fiber module and fibers plays an important role in the transfer of the HFRLM process; however, the study about the aspects is far from maturity. Especially, the study on flowing of fluid in shell side and shell side mass transfer attracts lots of researchers'attention.In this work, copper sulfate-Lix984N-sulfuric acid is chosen as the experimental system, to investigate the parameter of modules on the mass transfer of liquid membrane. Results showed that, the mass transfer coefficient increases with the increasing of the shell-side velocity, while the tube-side velocity, the concentration of Cu(II) in stripping and operation mode have no significant effect on the mass transfer coefficient. The mass transfer flux and coefficient decrease with increasing of the packing fraction and module length; with increasing the module diameter, the mass transfer coefficient of HFRLM increases up to a maximum value and the decreases. The model of HFRLM is presented based on the surface of Renewal Theory, resistance-in-series model and introducing the non-ideal flowing parameter into the shell-side correlation. The applicability and accuracy of the model are verified by some new data in the cascade and recycling experiments.