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Reduction of multicomponent systems to binary mixtures in distillation calculations

✍ Scribed by W.R. van Wijk; H.A.C. Thijssen


Publisher
Elsevier Science
Year
1954
Tongue
English
Weight
664 KB
Volume
3
Category
Article
ISSN
0009-2509

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✦ Synopsis


The theory of dlstlllatlon IS applied to approximate a multicomponent mixture by a simpler one In both the top se&on and the bottom section, two substitute components can be found which provide the best approxlmatlon of the specified components by a bmary rmxture for a given moderately large number of trays (e g 10 or 20) The dlstlllatlon can then be ealculated by the common methods apphcable to a bmary mwture A thn-d component is mtroduced d higher numbers of trays are consldered but the calculation method stdl remams essentially that of a bmary mixture The unspecified components are taken mto account by a snnple correction method Graphwal methods are given to unprove the latter correctlon and to calculate bquld or vapour rate of any actual component on an arbitrary tray A constant ratlo of volatllltles IS assumed Resume-L auteur appbque la theorie de la dlstlllatlon pour ramener le cas d'un melange h plusleurs composants au cas d'un melange bmalre Dans une se&on en t&e et en queue de colonne, 11 peut trouver deux composants " flctlfs " qul permettent la mellleure approximation des composants " actuels " par un mBlange bmalre et cela pour un nombre de plateaux relatwement grand (10 B 20) Les calculs de la dlstlllatlon s'effectuent alors par les procCd6s classlques apphcables it un mClange bmalre Pour un plus grand nombre de plateaux, 11 mtrodmt un trowtme composant mam le calcul reste encore, essentlellement celm d'un melange bmawe Par une m&hode simple de correctlon, 11 tlent compte des composants " nkghg& " Par des m&hodes graphlques, 11 peut amdhorer cette eorrectlon et calculer le taux hqmde et vapeur de chaque composant rtel sur un plateau arbltralre 11 admet un rapport constant des volatllltb.


📜 SIMILAR VOLUMES


Predicting NRTL parameters for binary hy
✍ M.J. Huron; J. Vidal; L. Asselineau 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 962 KB

Ah&w&The parameters of the NRTL method are fitted, for binary hydrocarbon systems, on the activity coefficients calculated by the Flory-Hildebrand method with binary coefficients ii, of deviation from the geometric mean assumption for cohesive energy densities (NRTL-FH parameters). For aromatic satu