Viscosity measurement and modeling of lipid supercritical carbon dioxide mixtures

Date

1998-01-31

Author

Yener, Meryem Esra
Rizvi, SSH
Harriott, P

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

239
views

0
downloads

The viscosities of supercritical carbon dioxide (SC-CO2) containing different levels of methyl oleate and oleic acid were measured with a high pressure capillary viscometer. The SC-CO2-methyl oleate system was evaluated at 313.15, 323.15 and 333.15 K and 11.5, 13.7 and 15.5 MPa, respectively. The SC-CO2-oleic acid system was evaluated at 313.15 K and 20.5 and 30.0 MPa and 333.15 K and 30.0 MPa. The increase in SC-CO2 viscosity was as high as 15-20% at the maximum methyl oleate concentrations (4-5 wt%) and 6-12% at the maximum oleic acid concentrations (2-3 wt%). The increase of relative viscosity with concentration was linear. The lipid-SC-CO2 mixtures were Newtonian. The Arrhenius equation, modified by the excess Gibbs free energy using solubility parameters of the components based on the regular solution theory, predicted the liquid phase and the fluid phase viscosities of the lipid-SC-CO2 mixtures within +/-25% and +/-1%, respectively. (C) 1998 Elsevier Science B.V.

Subject Keywords

Carbon Dioxide, High Pressure, Lipid, Mixtures, Viscosity

URI

https://hdl.handle.net/11511/42678

Journal

JOURNAL OF SUPERCRITICAL FLUIDS

DOI

https://doi.org/10.1016/s0896-8446(97)00036-3

Collections

Department of Food Engineering, Article

Suggestions

OpenMETU
Core

Dehydration of aqueous aprotic solvent mixtures by pervaporation Sarıalp, Gökhan; Kalıpçılar, Halil; Yılmaz, Levent; Department of Chemical Engineering (2012) Aprotic solvents are organic solvents which do not easily react with a substance dissolved in it and they do not exchange protons despite of their high ion and polar group dissolving power. Therefore, this characteristic property makes aprotic solvents very suitable intermediates in many industries producing pharmaceuticals, textile auxiliaries, plasticizers, stabilizers, adhesives and ink. Dehydration of these mixtures and recirculation of valuable materials are substantial issues in industrial application...
Polybenzimidazole based nanocomposite membranes with enhanced proton conductivity for high temperature PEM fuel cells Ozdemir, Yagmur; Uregen, Nurhan; DEVRİM, YILSER (2017-01-26) In this study, phosphoric acid doped PBI nanocomposite membranes were prepared by dispersion of various amounts of inorganic nanoparticles in PBI polymer followed by phosphoric acid (H3PO4) doping for high temperature proton exchange membrane fuel cells (HT-PEMFC). All of the PBI composite membranes were cast from the same FBI polymer with the same molecular weight. Titanium dioxide (TiO2), silicon dioxide (SiO2) and inorganic proton conductor zirconium phosphate (ZrP) were used as inorganic fillers. The PB...
Steady-state parallel plate apparatus for measurement of diffusion coefficient in supercritical carbon dioxide Tuan, DQ; Yener, Meryem Esra; Zollweg, JA; Harriott, P; Rizvi, SSH (1999-02-01) A new, steady-state experimental system for measurement of the Fickian diffusion coefficients for solutes in supercritical carbon dioxide (SC-CO2) was designed and evaluated. Mass transfer between a Liquid solute and SC-CO2 was carried out in a parallel plate geometry where a porous metal sheet, immersed in the liquid phase, stabilized the interface. The SC-CO2 flowed over the porous metal sheet containing the liquid phase which was presaturated with CO2. The use of the porous metal sheet and a thin mobile ...
Electrochemical polymerization of 9-fluorenecarboxylic acid and its electrochromic device application Bezgin, Buket; CİHANER, ATİLLA; Önal, Ahmet Muhtar (Elsevier BV, 2008-09-01) Poly(9-fluorenecarboxylic acid) (PFCA) was synthesized by electrochemical oxidation of 9-fluorenecarboxylic acid (FCA) using a mixture of nitromethane and boron trifluoride diethyl etherate as the solvent and tetrabutylammonium tetrafluoroborate as the supporting electrolyte. An insoluble and conducting brownish-orange film was deposited on the electrode surface, both during repetitive cycling and constant potential electrolysis at 1.15 V. Characterization of the polymer film has been carried out using Four...
Sorption Efficiency of Chitosan Nanofibers toward Metal Ions at Low Concentrations Horzum, Nesrin; Boyacı, Ezel; Eroglu, Ahmet E.; Shahwan, Talal; Demir, Mustafa M. (2010-12-01) Chitosan fibers showing narrow diameter distribution with a mean of 42 nm were produced by electrospinning and utilized for the sorption of Fe(III), Cu(II), Ag(I), and Cd(II) ions from aqueous solutions. The ion concentrations in the supernatant solutions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The filtration efficiency of the fibers toward these ions was studied by both batch and microcolumn methods. High efficiency in sorption of the metal ions was obtained in the both...

Citation Formats

M. E. Yener, S. Rizvi, and P. Harriott, “Viscosity measurement and modeling of lipid supercritical carbon dioxide mixtures,” JOURNAL OF SUPERCRITICAL FLUIDS, pp. 151–162, 1998, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42678.