Interfacial properties of binary mixtures

Literature Information

Publication Date 2002-02-18
DOI 10.1039/B108535M
Impact Factor 3.676
Authors

H. Kahl, S. Enders


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Abstract

Interfacial properties are important in many engineering applications throughout the chemical industry (i.e. distillation and extraction columns, piping used for adsorption and fluid flow). The variation of interfacial properties (interfacial tension, interfacial profiles, interfacial thickness and relative Gibbs adsorption of one component) with temperature and pressure strongly influences the mass transport between fluid phases. In this contribution the gradient theory is applied for modelling the interfacial properties of planar interface in different binary systems between two fluid phases. The Cahn–Hilliard theory was combined with the Peng–Robinson EOS or the original SAFT EOS in order to describe both the phase behaviour and the interfacial properties. The paper focuses on the experimental and theoretical investigation of the interfacial tension between the coexisting liquid phases. In the present study we find that for mixtures containing associating components the simultaneous correlation of both phase equilibria and interface properties with the SAFT EOS in combination with the Cahn–Hilliard theory is possible. For systems where only vapour–liquid equilibria are present, the simpler PR EOS can be used for the simultaneous modelling of phase and interfacial properties.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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