title: Improving performance of a five-zone simulated moving bed chromatography for ternary separation by simultaneous use of partial-feeding and partial-closing of the product port in charge of collecting the intermediate-affinity solute molecules.
abstract: The performance of a five-zone simulated moving bed (SMB) chromatographic process for ternary separation has been improved to a certain extent in previous researches by applying either a partial-feeding (PF) or a partial-closing of the extract-2 port (PCE(2)) to its operation. To make a further improvement, the strategy of applying both PF and PCE(2) simultaneously to the five-zone SMB operation was proposed in this study. The results from both equilibrium-theory analysis and detailed simulation proved that the proposed strategy, which was called PF-PCE(2) in this article, had the benefit of a synergy between the individual merits of PF and PCE(2) in the five-zone SMB performance. As a consequence, the PF-PCE(2) mode could surpass the PF and the PCE(2) modes by a wide margin and the standard mode by a much wider margin in the aspects of ternary-separation performance and throughput. For the separation system considered, the PF-PCE(2) mode was found to achieve more than 100% improvement, compared to the standard mode. Furthermore, such advantage of the PF-PCE(2) over all the other modes was greater as the selectivity between the intermediate-affinity and the highest-affinity components was reduced.
authors.affiliation: Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul, 133-791, South Korea. munsy@hanyang.ac.kr
authors.forename: Sungyong
authors.initials: S
authors.lastname: Mun
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008962:Models, Theoretical; D009705:Nucleosides / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D009705:Nucleosides