BIBLIOS

Tipo
Artigos em Revista

Tipo de Documento
Artigo Completo

Título
Liquid mutual diffusivities of the H2O/D2O system

Participantes na publicação
M. L. S. Matos Lopes (Author)
Dep. Química e Bioquímica
CQE
C. A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE

Resumo
The liquid-phase mutual diffusivities of the water (H2O) and deuterium oxide (D2O) system at 298.2 K were measured using an instrument based on the Taylor dispersion technique. The instrument has been designed to match, as closely as possible, the mathematical model of ideal Taylor dispersion, minimizing all the departures from the ideal model. The diffusivities were measured over the entire concentration range and the results follow a linear dependence on molar fraction given by 109 D 12 =2.24−0.36xD2O, where D 12 is in m2·s−1. Comparison with highly accurate data obtained by a Rayleigh interferometer seems to indicate that the accuracy of the present instrument is 1%. The hard-sphere model was applied to the estimation of the mutual diffusivities of this system and good agreement was found with experiment, deviations being ±3.5%.


Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Suporte
International Journal of Thermophysics

Identificadores da Publicação

Editora
Springer Science and Business Media LLC



Identificadores do Documento
DOI - https://doi.org/10.1007/bf00502401
URL - http://dx.doi.org/10.1007/bf00502401

Keywords
deuterium oxide diffusivity mass transfer Taylor dispersion technique water

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