Publication Type Journal Article
Title Viscosity of poly(ethyleneglycol) 200 [PEG 200] saturated with supercritical carbon dioxide
Authors Helena Avelino João Fareleira Didier Gourgouillon Jose M. Igreja Manuel Nunes da Ponte
Groups MET
Journal JOURNAL OF SUPERCRITICAL FLUIDS
Year 2017
Month October
Volume 128
Number
Pages 300-307
Abstract The article presents viscosity measurements on mixtures of poly(ethyleneglycol) 200 (PEG 200) saturated with supercritical CO2, along three isotherms, at approximately 313 K, 333 K and 348 K, and pressures up to 25 MPa. The measurements have been performed with a previously described vibrating wire instrument. The results show a steep initial viscosity decrease with increasing pressure of CO2, followed by a flatter zone, extending up to 25 MPa. This behavior, which is quantitatively temperature dependent, seems to be closely related to the solubility of CO2 as a function of pressure. The experimental method for the determination of the viscosity requires the density of the samples. For this purpose, the density data for the mixtures were calculated from phase equilibrium studies by Gourgouillon and Nunes da Ponte, using the Sanchez-Lacombe equation of state. The measured viscosity data for CO2 saturated PEG 200 solutions were then correlated using the Kelly-Bueche theory. (C) 2017 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.supflu.2017.02.024
ISBN
Publisher ELSEVIER SCIENCE BV
Book Title
ISSN 0896-8446
EISSN 1872-8162
Conference Name
Bibtex ID ISI:000408287400035
Observations
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