New equipment using a static analytic method for the study of vapour–liquid equilibria at temperatures down to 77 K

A new apparatus designed for the study of vapour–liquid equilibria (VLE) of small molecules at temperatures down to 77 K and pressures up to 40 MPa was built, set-up and used up to 2.8 MPa. It is based on the `static-analytic' method using two pneumatic capillary sampling devices, which allow t...

Full description

Saved in:
Bibliographic Details
Published in:Fluid phase equilibria 1999-12, Vol.166 (2), p.225-236
Main Authors: Baba-Ahmed, A, Guilbot, P, Richon, D
Format: Article
Language:English
Subjects:
Argon
Chemistry
Exact sciences and technology
Experimental method
General and physical chemistry
Liquid-vapor equilibria
Low temperatures
Nitrogen
Oxygen
Phase equilibria
SRK equation of state (SRK-EoS)
Vapour–liquid equilibrium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new apparatus designed for the study of vapour–liquid equilibria (VLE) of small molecules at temperatures down to 77 K and pressures up to 40 MPa was built, set-up and used up to 2.8 MPa. It is based on the `static-analytic' method using two pneumatic capillary sampling devices, which allow taking small and reliable in-situ samples and performing direct analyses through gas chromatography. Accurate P, x, y isothermal data obtained for the O 2–N 2 and Ar–N 2 mixtures are well represented by the Soave–Redlich–Kwong equation of state (SRK-EoS). The conclusions which can be drawn from the comparison with literature data are the following: maximum deviations on pressure, temperature and vapour phase composition, between literature experimental data and the calculated ones (using our binary interaction parameters) are not larger than 3.3%, 0.12 K and 4.2%. We also point out inconsistencies in several literature data.
ISSN:0378-3812
1879-0224
DOI:10.1016/S0378-3812(99)00294-0