A vapor permeation processes for the separation of aromatic compounds from aliphatic compounds
- A number of rubbery and glassy membranes have been prepared and evaluated in vapor permeation experiments for separation of aromatic/aliphatic mixtures, using 5/95 (wt:wt) toluene/methylcyclohexane (MCH) as a model solution. Candidate membranes that met the required toluene/MCH selectivity of ≥ 10 were identified. The stability of the candidate membranes was tested by cycling the experiment between higher toluene concentrations and the original 5 wt% level. The best membrane produced has a toluene permeance of 280 gpu and a toluene/MCH selectivity of 13 when tested with a vapor feed of the model mixture at its boiling point and at atmospheric pressure. When a series of related membrane materials are compared, there is a sharp trade-off between membrane permeance and membrane selectivity. A process design study based on the experimental results was conducted. The best preliminary membrane design uses 45% of the energy of a conventional distillation process.
Author of HS Reutlingen | Bell, Carl-Martin |
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URN: | urn:nbn:de:bsz:rt2-opus4-245 |
DOI: | https://doi.org/10.1080/01496395.2014.928325 |
ISSN: | 0149-6395 |
eISSN: | 1520-5754 |
Erschienen in: | Separation science and technology |
Publisher: | Taylor & Francis |
Place of publication: | Philadelphia |
Document Type: | Journal article |
Language: | English |
Publication year: | 2014 |
Tag: | aromatics separation; energy savings; membranes; vapor-permeation |
Volume: | 49 |
Issue: | 15 |
Page Number: | 8 |
First Page: | 2271 |
Last Page: | 2279 |
DDC classes: | 541 Physikalische Chemie |
624 Ingenieurbau und Umwelttechnik | |
Open access?: | Nein |
Licence (German): | In Copyright - Urheberrechtlich geschützt |