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Vapor‐liquid equilibria at high temperatures: The selenium‐tellurium system
Author(s) -
Yannopoulos J. C.,
Themelis N. J.
Publication year - 1964
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450420508
Subject(s) - tellurium , selenium , chemistry , boiling , vapor pressure , thermodynamics , distillation , atmospheric pressure , boiling point , consistency (knowledge bases) , analytical chemistry (journal) , chromatography , inorganic chemistry , organic chemistry , mathematics , meteorology , physics , geometry
The vapor‐liquid phase equilibria for the system selenium‐tellurium were determined in the composition range of 40% to 99.999% by weight. Measurements were made by means of a dynamic distillation apparatus at atmospheric pressure and boiling temperatures from 688° to 773°C. Under the above experimental conditions, selenium and tellurium are known to exist in a number of molecular forms, such as Se 2 , Se 4 , etc. It was, therefore, necessary to estimate the average molecular weights of the two elements on the basis of published data. An attempt was made to test the thermodynamic consistency of the equilibrium data. The activity coefficient plots were used to extend the experimental x‐y data over most of the composition range.