Open AccessA design and study of the effects of selectivity on binary separation in a four-zone simulated moving bed for systems with linear isotherms
Author(s) -
Marco Aurélio Cremasco,
N.-H. Linda Wang
Publication year - 2003
Publication title -
brazilian journal of chemical engineering/brazilian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.313
H-Index - 52
eISSN - 1678-4383
pISSN - 0104-6632
DOI - 10.1590/s0104-66322003000200012
Subject(s) - simulated moving bed , yield (engineering) , throughput , selectivity , process engineering , separation (statistics) , binary number , separation process , volumetric flow rate , chemistry , chromatography , materials science , mechanics , catalysis , adsorption , mathematics , computer science , engineering , organic chemistry , statistics , composite material , telecommunications , arithmetic , physics , wireless
The simulated moving bed (SMB) is potentially an economical method for the separation and purification of natural products because it is a continuous processes and can achieve higher productivity, higher product recovery, and higher purity than batch chromatographic processes. Despite the advantages of SMB, one of the challenges is to specify its zone flow rates and switching time. In this case it is possible to use the standing wave analysis. In this method, in a binary system, when certain concentration waves are confined to specific zones, high product purity and yield can be assured. Appropriate zone flow rates, zone lengths and step time are chosen to achieve standing waves. In this study the effects of selectivity on yield, throughput, solvent consumption, port switching time, and product purity for a binary system are analyzed. The results show that for a given selectivity the maximum throughput decreases with increasing yield, while solvent consumption and port switching time increase with increasing yield. To achieve the same purity and yield, a system with higher selectivity has a higher throughput and lower solvent consumption