TY - JOUR
T1 - Coating SiO2 nanoparticles with polyvinyl alcohol for interfacial tension alteration in the system CO2+polyethylen glycol+water
AU - Ghanaatian, Alireza
AU - Elhambakhsh, Abbas
AU - Bakhtyari, Ali
AU - Ghasemi, Mohammad Noor
AU - Esmaeilzadeh, Feridun
AU - Vakili-Nezhaad, G. Reza
N1 - Publisher Copyright:
© 2022
PY - 2022/8/1
Y1 - 2022/8/1
N2 - Interfacial tension (IFT) data were measured and correlated by a theoretical model for the system CO2/polyethylene glycol (PEG) (40 wt.%)+water (60 wt.%). The effect of both bare SiO2 nanoparticles (NPs) as well as their modified surface counterparts on the IFT alteration was investigated. SiO2 NPs were synthesized followed by coating with polyvinyl alcohol (PVA). IFT measurements based on a well-established pendant droplet technique were carried out in the presence of 0.00–0.05 wt.% NPs over the temperatures and pressures of 298–323 K and 0.1–4.0 MPa, respectively. The obtained results depict that IFT decreases with increasing pressure and increasing NPs concentration, and increases with increasing temperature. It was shown that increasing the SiO2 NPs concentration from 0.00 to 0.05 wt.% causes a 35.8% decrease at constant pressure and temperature of 3.0 MPa and 323 K, respectively. Increasing pressure from 2.0 to 4.0 MPa in the presence of 0.03 wt.% SiO2 NPs decreases the IFT of the system by 27% at a constant temperature of 313 K. Lower IFTs were observed (11.50–18.90%) when PVA-coated NPs were added to the fluid. Finally, the parameters of the employed theoretical model were determined using global and local parameters, the latter of which showed higher precisions in the representation of data.
AB - Interfacial tension (IFT) data were measured and correlated by a theoretical model for the system CO2/polyethylene glycol (PEG) (40 wt.%)+water (60 wt.%). The effect of both bare SiO2 nanoparticles (NPs) as well as their modified surface counterparts on the IFT alteration was investigated. SiO2 NPs were synthesized followed by coating with polyvinyl alcohol (PVA). IFT measurements based on a well-established pendant droplet technique were carried out in the presence of 0.00–0.05 wt.% NPs over the temperatures and pressures of 298–323 K and 0.1–4.0 MPa, respectively. The obtained results depict that IFT decreases with increasing pressure and increasing NPs concentration, and increases with increasing temperature. It was shown that increasing the SiO2 NPs concentration from 0.00 to 0.05 wt.% causes a 35.8% decrease at constant pressure and temperature of 3.0 MPa and 323 K, respectively. Increasing pressure from 2.0 to 4.0 MPa in the presence of 0.03 wt.% SiO2 NPs decreases the IFT of the system by 27% at a constant temperature of 313 K. Lower IFTs were observed (11.50–18.90%) when PVA-coated NPs were added to the fluid. Finally, the parameters of the employed theoretical model were determined using global and local parameters, the latter of which showed higher precisions in the representation of data.
KW - Carbon dioxide
KW - IFT
KW - PEG
KW - SiO@PVA
KW - Surface modification
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U2 - 10.1016/j.surfin.2022.102164
DO - 10.1016/j.surfin.2022.102164
M3 - Article
AN - SCOPUS:85133687871
SN - 2468-0230
VL - 32
JO - Surfaces and Interfaces
JF - Surfaces and Interfaces
M1 - 102164
ER -