Single-Column Simulated Moving-Bed Process with Recycle Lag: Analysis and Applications
| Autor: | Rui C. R. Rodrigues, Ricardo J.S. Silva, João M. M. Araújo, José P. B. Mota |
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| Rok vydání: | 2007 |
| Předmět: |
Chromatography
Chemistry Unit of time General Chemical Engineering Lag lcsh:QD450-801 Process (computing) lcsh:Physical and theoretical chemistry Port (circuit theory) 02 engineering and technology Surfaces and Interfaces General Chemistry Interval (mathematics) 010501 environmental sciences 01 natural sciences Column (database) chemistry.chemical_compound 020401 chemical engineering Asynchronous communication Control theory 0204 chemical engineering Simulated moving bed 0105 earth and related environmental sciences |
| Zdroj: | Adsorption Science & Technology, Vol 25 (2007) |
| ISSN: | 2048-4038 0263-6174 |
| DOI: | 10.1260/026361707785082369 |
| Popis: | We report some conceptual and numerical results for a single-column chromatographic process analogous to a simulated moving bed (SMB) with asynchronous port switching. It is shown that the periodic state of the multi-column SMB unit is reproduced by a one-column chromatograph in which the part of its outlet stream that is not recovered as product is recycled back to the column with a lag of (N – 1)τ time units, where N and τ are, respectively, the number of columns and the switching interval of the equivalent SMB unit. This requirement holds true regardless of the port configuration or operational scheme of the analogous multi-column unit. The proposed one-column chromatographic process is a more compact, less expensive and simpler-to-operate alternative to the SMB. By changing the operation of the single-column chromatograph from the classical synchronous port switching to an optimized asynchronous Varicol mode, it is shown that one can easily compensate for a less perfect operation of the plug-flow device that implements the recycle lag. |
| Databáze: | OpenAIRE |
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