Models for self-diffusion coefficients of dense fluids, including hydrogen-bonding substances

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Silva, CM (Autor) Outra; Liu, HQ (Autor) Outra; Maria Eugénia Macedo (Autor) FEUP

Revista

Título: Chemical Engineering Science

Vol. 53

Páginas: 2423-2429

ISSN: 0009-2509

Editora: Elsevier

Indexação

ISI Web of Knowledge - 35 Citações

ISI Web of Science

Scopus - 40 Citações

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Outras Informações

ID Authenticus: P-001-7H7

DOI: 10.1016/s0009-2509(98)00037-2

Abstract (EN): This work comprises two main and independent purposes: (1) A new four-parameter model is proposed for the description of self-diffusion coefficients of polar, nonspherical and even hydrogen-bonding substances. It gives accurate results over wide ranges of temperature and pressure (AAD = 4.45%; 2471 data points). This equation is devised from an extension of a Lennard-Jones fluid model embodying the van der Waals model approach. (2) Generalized correlations are suggested for the estimation of the Lennard-Jones force constants (energy and diameter) of a two-parameter equation. From these it is possible to predict tracer diffusivities with satisfactory results, by means of simple combining rules.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7