https://scholars.lib.ntu.edu.tw/handle/123456789/378294
Title: | Critical assessment of the energy-saving potential of an extractive dividing-wall column | Authors: | Wu, Y.C. Hsu, P.H.-C. Chien, I.-L. I-LUNG CHIEN |
Issue Date: | 2013 | Journal Volume: | 52 | Journal Issue: | 15 | Start page/Pages: | 5384-5399 | Source: | Industrial and Engineering Chemistry Research | Abstract: | In this paper, the energy-saving potential of an extractive dividing-wall column (EDWC) is investigated. One potential drawback on the EDWC design is that two reboilers in the original design need to be combined into one reboiler. Since a heavy entrainer is used in the extractive distillation system, often cases show that the total reboiler duty is reduced but with adversely increasing the total steam cost. Three industrial separation systems of isopropyl alcohol-water, dimethyl carbonate-methanol, and acetone-methanol have been used as demonstrating examples for critical assessment of the energy-saving potential of the EDWC design. It is found that although the savings of the overall reboiler duty can be made by using the EDWC design, only the acetone-methanol system using water as an entrainer actually saves on the steam cost. The control performance of the EDWC design is also hampered because of losing one important control degree-of-freedom. © 2013 American Chemical Society. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84876488807&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/378294 |
DOI: | 10.1021/ie3035898 | SDG/Keyword: | Control performance; Critical assessment; Dividing-wall columns; Energy saving potential; Entrainer; Extractive distillation systems; Industrial separation; Original design; Acetone; Energy conservation; Methanol; Reboilers; Design |
Appears in Collections: | 化學工程學系 |
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