TY - JOUR
T1 - Viscosity of poly(ethyleneglycol) 200 [PEG 200] saturated with supercritical carbon dioxide
AU - Avelino, Helena M.N.T.
AU - Fareleira, João M.N.A.
AU - Gourgouillon, Didier
AU - Igreja, José M.
AU - Nunes da Ponte, Manuel
N1 - Sem pdf conforme despacho.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - 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.
AB - 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.
KW - CO
KW - Polymer
KW - Reduction
KW - Solubility
KW - Supercritical
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=85014762056&partnerID=8YFLogxK
U2 - 10.1016/j.supflu.2017.02.024
DO - 10.1016/j.supflu.2017.02.024
M3 - Article
AN - SCOPUS:85014762056
SN - 0896-8446
VL - 128
SP - 300
EP - 307
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
ER -