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Density of supercritical CO 2 ‐tetrahydrofuran binary mixture and the partial molar volume of the cosolvent
Author(s) -
Qun Xu,
BuXing Han,
HaiKe Yan
Publication year - 1998
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19980160505
Subject(s) - tetrahydrofuran , chemistry , supercritical fluid , partial molar property , molar , molar volume , volume (thermodynamics) , apparent molar property , supercritical carbon dioxide , partial pressure , molar ratio , thermodynamics , analytical chemistry (journal) , chromatography , organic chemistry , aqueous solution , catalysis , solvent , medicine , physics , dentistry , oxygen
The densities of supercritical CO 2 ‐tetrahydrofuran (cosolvent) binary mixture were measured at temperatures in range of 308.15 to 323.15 K and at pressure up to 16.5 MPa. The concentrations of tetrahydrofuran were from 0 to 0.57 mol/L. The partial molar volume of tetrahydrofuran was calculated based on the relationship between the density of the mixture and the concentration of the cosolvent. It is observed that the partial molar volume of the cosolvent is negative and the absolute value decreases with increasing pressure and the concentration of the cosolvent.