Modeling the high-pressure behavior of binary mixtures of carbon dioxide+alkanols using an excess free energy mixing rule
Document title: Modeling the high-pressure behavior of binary mixtures of carbon dioxide+alkanols using an excess free energy mixing rule
Journal: Brazilian journal of chemical engineering
Database: PERIÓDICA
System number: 000308952
ISSN: 0104-6632
Authors: 1
2
3
Institutions: 1Universidade Federal do Rio de Janeiro, Escola de Quimica, Rio de Janeiro. Brasil
2Instituto Politécnico Nacional, Escuela Superior de Ingeniería Química e Industrias Extractivas, México, Distrito Federal. México
3University of Delaware, Center for Molecular and Engineering Thermodynamics, Newark, Delaware. Estados Unidos de América
Year:
Season: Dic
Volumen: 21
Number: 4
Pages: 659-666
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The behavior of binary mixtures of carbon dioxide+alkanol (1-butanol, 2-butanol, 1-pentanol, or 2-pentanol) at high pressures was modeled using the Stryjek-Vera version of the Peng-Robinson equation of state. Two mixing rules were compared for this purpose: the classical one-fluid van der Waals and the Wong-Sandler mixing rules. In the case of the latter mixing rule, the NRTL model for the excess Gibbs free energy was used. We observed that both mixing rules can reproduce the qualitative aspects of the critical diagrams of these binary mixtures. A comparison of the results shows that there is no clear superiority of one mixing rule over the other in terms of the ability to predict the critical behavior of these mixtures
Disciplines: Química
Keyword: Química orgánica,
Ingeniería química,
Mezclas binarias,
Dióxido de carbono,
Alcanoles,
Alta presión
Keyword: Chemistry,
Organic chemistry,
Chemical engineering,
Binary mixtures,
Carbon dioxide,
Alkanols,
High pressure
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