The design of the operating conditions for the separation of multicomponent mixtures using a non adsorbable eluent through simulated moving bed (SMB) technology is considered. The results obtained in the frame of Equilibrium Theory in the case of adsorption described by Langmuir models lead to the definition of explicit constraints on the operating parameters to operate the unit in the desired separation regime. In this paper this approach is extended to the new situation of the separation of a mixture of C solutes in an inert solvent, or eluent, described by the multicomponent non stoichiometric Langmuir isotherm. This represents an important problem in the field of fine chemical separations. The algorithms necessary to calculate the regions of complete separation as well as the regions where some components distribute in the extract and the raflinate, are derived. Finally, the theoretical findings are assessed through detailed simulations of different multicomponent separations in one or two SMB units. (C) 2000 Elsevier Science B.V. All rights reserved.
Design of simulated moving bed multicomponent separations: Langmuir systems
MORBIDELLI, MASSIMO
2000-01-01
Abstract
The design of the operating conditions for the separation of multicomponent mixtures using a non adsorbable eluent through simulated moving bed (SMB) technology is considered. The results obtained in the frame of Equilibrium Theory in the case of adsorption described by Langmuir models lead to the definition of explicit constraints on the operating parameters to operate the unit in the desired separation regime. In this paper this approach is extended to the new situation of the separation of a mixture of C solutes in an inert solvent, or eluent, described by the multicomponent non stoichiometric Langmuir isotherm. This represents an important problem in the field of fine chemical separations. The algorithms necessary to calculate the regions of complete separation as well as the regions where some components distribute in the extract and the raflinate, are derived. Finally, the theoretical findings are assessed through detailed simulations of different multicomponent separations in one or two SMB units. (C) 2000 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
