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Conceptual Design of Non-ideal Mixtures Separation with Light Entrainers

Shen, Weifeng and Benyounes, Hassiba and Dong, Lichun and Wei, Shun'an and Li, Jie and Gerbaud, Vincent Conceptual Design of Non-ideal Mixtures Separation with Light Entrainers. (2016) Brazilian Journal of Chemical Engineering, 33 (04). 1041-1053. ISSN 0104-6632

(Document in English)

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Official URL: http://dx.doi.org/10.1590/0104-6632.20160334s20140169


A method is proposed to study the separation of minimum-, maximum-boiling azeotropic, and low volatility mixtures with a light entrainer, to investigate feasible regions of the key operating parameters reboil ratio (S) and entrainer - feed flowrate ratio (FE/F) for continuous processes. The thermodynamic topological predictions are carried out for 1.0–2, 1.0–1a, and 0.0–1 Serafimov’s class diagrams. It relies upon the knowledge of residue curve maps, along with the univolatility line, and it enables the prediction of possible products at the bottom of the column and limiting values of FE/F. The profiles of the stripping, extractive, and rectifying sections are calculated by equations considering S and FE/F, and they bring information about the location of singular points and possible composition profile separatrices that could impair process feasibility. Providing specified product composition and recovery, the approximate calculations are compared with rigorous simulations of extractive distillation processes. Separating non-ideal mixtures using a light entrainer provides more opportunities for the case when it is not easy to find an appropriate heavy or intermediate entrainer

Item Type:Article
Additional Information:Thanks to Brazilian Society of Chemical engineering editor. The original PDF of the article can be found at http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322016000401041&lng=en&tlng=en
HAL Id:hal-01561018
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Chinese Academy of Sciences (CHINA)
Other partners > Chongqing University (CHINA)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université des Sciences et de la Technologie Mohamed Boudiaf d'Oran - USTO (ALGERIA)
Laboratory name:
Deposited On:12 Jul 2017 09:38

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