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  4. Electrifying distillation − Optimization-based evaluation of internally heat-integrated distillation columns
 
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Electrifying distillation − Optimization-based evaluation of internally heat-integrated distillation columns

Citation Link: https://doi.org/10.15480/882.14327
Publikationstyp
Journal Article
Date Issued
2024-12-15
Sprache
English
Author(s)
Adami, Momme  orcid-logo
Systemverfahrenstechnik V-4  
Farheen, Kayenat  
Systemverfahrenstechnik V-4  
Skiborowski, Mirko  orcid-logo
Systemverfahrenstechnik V-4  
TORE-DOI
10.15480/882.14327
TORE-URI
https://tore.tuhh.de/handle/11420/53243
Journal
Separation and purification technology  
Volume
360
Article Number
131061
Citation
Separation and Purification Technology 360: 131061 (2024)
Publisher DOI
10.1016/j.seppur.2024.131061
Scopus ID
2-s2.0-85212848140
Publisher
Elsevier
Improving the energy efficiency of distillation processes is essential for reducing the chemical industry's substantial energy demand and environmental footprint. The use of mechanical heat pumps with compressors is an important asset in this transformation process, as it not only enables the recovery of heat rejected at low temperature, reducing external energy requirements, but also facilitates the electrification of chemical processes and distillation in specific. The necessary temperature lift dictates the required compression rate for the compressor and is therefore of considerable importance for the applicability of mechanical heat pumps. By operating the rectifying and stripping sections of a column at different pressures and enabling heat exchange between the respective sections, temperature lift and compression ratio can be reduced for the so-called Internally Heat-Integrated Distillation Columns compared to mechanical vapor recompression. In order to enable a quick problem specific evaluation of the possible benefits of this concept we propose two novel superstructure models for optimal design, that allow for heat exchange between stages at the same height or arbitrary stages in the rectifying and stripping section, provided a minimum temperature difference is maintained. The respective optimization problems are solved as a series of successively relaxed mixed-integer nonlinear programming problems in GAMS. An automatic stepwise initialization and optimization strategy provides a computationally efficient approach for the determination of optimized designs.
Subjects
Electrified Distillation | Heat integration | Heat pumps | HIDiC | Optimization-based design | Vapor recompression
DDC Class
660: Chemistry; Chemical Engineering
620: Engineering
519: Applied Mathematics, Probabilities
Funding(s)
Projekt DEAL  
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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