Three-port operation in three-zone simulated moving bed chromatography

Kyung Min Kim, Ji Yeon Song, Chang Ha Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A new operating method, namely three-port operation in a three-zone simulated moving bed (TT-SMB), was developed to improve the separation performance of simulated moving bed (SMB) chromatography. In the TT-SMB, the switching period consists of two steps; extract outlet port is closed at the first step for raffinate production and raffinate outlet port is closed at the second step for extract production. As a result, three ports were used in each step of the three-zone SMB operation. The separation performance of TT-SMB was compared with conventional three- and four-zone SMBs in terms of purity, recovery, productivity, and eluent consumption. A conventional three-zone SMB operation usually produced the contaminated portion at the product outlet node during the switching period. However, such phenomenon could be prevented by using the TT-SMB operation because one product outlet port was closed at each step. Compared to the conventional three-zone SMB, all performance parameters improved with the use of TT-SMB, and the improvement in purity and recovery was significant (up to 7%). Adjusting the step ratio played a key role in the trade-off between the performance parameters. The purity, recovery, and productivity of TT-SMB at well-designed step ratio conditions are up to 3% higher than those of the conventional four-zone methods (1-1-1-1 configuration).

Original languageEnglish
Pages (from-to)79-89
Number of pages11
JournalJournal of Chromatography A
Publication statusPublished - 2014 May 2

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support by DAPA/ADD of Korea ( Converged Energy Materials Research Center ) and Korean Institute of Energy Technology Evaluation and Planning ( 20122010200050 ).

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry


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