Membrane contactors in the beverage industry for controlling the water gas composition.
In the work described here, membrane contactors are used for coupling the removal of species (oxygen and hydrogen sulfide) present in the water with the water carbonation process. We include both experiments and a theoretical study devoted to the analysis of the transport phenomena that occur in the membrane contactor. The main resistance to mass transport was located at the liquid side. Correlations between Sherwood and Reynolds numbers on the shell side that are suitable for the membrane contactor used to carry out our experiments have been determined. In particular, for Re > 1.6, the expression proposed by Yang and Cussler in 1986: Sh = 0.90 Re(0.40) Sc(0.33) describes the behavior of the system; whereas, for Re between 0.03 and 0.3, a new expression is proposed: Sh = 0.435 Re(1.2)Sc(0.33). A comparison with traditional equipment is also furnished. Membrane contactors offer reduced size, CO(2) consumption, and capital costs.
Criscuoli
Alessandra
A
Research Institute on Membrane Technology (ITM-CNR), Via Pietro Bucci Cubo 17/C, Rende (CS) 87030 Italy. a.criscuoli@itm.cnr.it
Drioli
Enrico
E
Moretti
Ugo
U