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Titolo:
THERMODYNAMICS OF BRANCHED ALCOHOLS - II - SOLID-LIQUID EQUILIBRIA FOR SYSTEMS CONTAINING TERT-BUTANOL AND LONG-CHAIN N-ALKANES - EXPERIMENTAL RESULTS AND COMPARISON WITH DISQUAC PREDICTIONS
Autore:
DOMANSKA U; GONZALEZ JA;
Indirizzi:
UNIV VALLADOLID,DEPT TERMODINAM & FIS APLICADA E-47071 VALLADOLID SPAIN UNIV VALLADOLID,DEPT TERMODINAM & FIS APLICADA E-47071 VALLADOLID SPAIN WARSAW UNIV TECHNOL,FAC CHEM,DIV PHYS CHEM PL-00664 WARSAW POLAND
Titolo Testata:
Fluid phase equilibria
fascicolo: 1-2, volume: 147, anno: 1998,
pagine: 251 - 270
SICI:
0378-3812(1998)147:1-2<251:TOBA-I>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVEN-NUMBERED PARAFFINS; PLUS CYCLOHEXANE MIXTURES; ALIPHATIC-ALCOHOLS; ORGANIC MIXTURES; ROTATOR PHASE; SOLUBILITY; 1-TETRADECANOL; 1-HEXADECANOL; 1-OCTADECANOL; 1-ALKANOLS;
Keywords:
EXPERIMENTAL; SOLID-LIQUID EQUILIBRIA; TERT-BUTANOL; LONG-CHAIN N-ALKANES; TRANSITIONS; SIZE EFFECTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
54
Recensione:
Indirizzi per estratti:
Citazione:
U. Domanska e J.A. Gonzalez, "THERMODYNAMICS OF BRANCHED ALCOHOLS - II - SOLID-LIQUID EQUILIBRIA FOR SYSTEMS CONTAINING TERT-BUTANOL AND LONG-CHAIN N-ALKANES - EXPERIMENTAL RESULTS AND COMPARISON WITH DISQUAC PREDICTIONS", Fluid phase equilibria, 147(1-2), 1998, pp. 251-270

Abstract

Solid-liquid equilibrium temperatures for tert-butanol + n-alkanes (C-18, C-19, C-20, C-21, C-22, C-23, C-24, C-25, C-26, C-28) systems have been measured by a dynamic method from 298.15 K to the melting pointof the alkane. All the systems present an eutectic point at very low concentration of the alcohol. A first-order transition was observed for many of the n-alkanes considered. The experimental values are compared with those given by the DISQUAC model using the interaction parameters previously determined on the basis of vapor-liquid equilibria, VLE, and molar excess enthalpies, H-E, of systems containing the lower n-alkanes (n-C-6, n-C-7). Calculations were developed taking into account the solid-solid transition of the alkanes. The mean relative standard deviation for the equilibrium temperatures is 0.0073. Differences between experimental data and calculated results for SLE and H-E are analysed in terms of the Patterson effect. The possibility of improving predictions by modifying only the third dispersive interchange coefficient is discussed. Two values for this parameter are proposed dependingon n, hereafter the number of C atoms in the n-alkane (n less than orequal to 8 and n greater than or equal to 9). In this way, the variation with the temperature of HE is better represented by the model for those systems including the longer n-alkanes. Predictions on SLE remain unchanged, because they depend essentially on the first interchange coefficients when the range of temperature considered, as in this case, is rather narrow. (C) 1998 Elsevier Science B.V. All rights reserved.

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Documento generato il 29/03/20 alle ore 08:24:06