Viscosity of aqueous calcium chloride solutions at high temperatures and high pressures

Abdulagatov, Ilmutdin M.; Azizov, N. D.

doi:10.1016/j.fluid.2005.12.036

Cited by 62 publications

(37 citation statements)

References 64 publications

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“…In the present experiment, variations in the solvent viscosity , whether due to finite polymer [18] or salt [25] concentration, together amount to no more than 15%. Any change recorded in f in excess of this therefore signals a modification of the effective size of the chain subunits.…”

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confidence: 44%

Scaling Equations for a Biopolymer in Salt Solution

2007

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The effect of the simultaneous presence of monovalent and divalent cations on the thermodynamics of polyelectrolyte solutions is an incompletely solved problem. In physiological conditions, combinations of these ions affect structure formation in biopolymer systems. Dynamic light scattering measurements of the collective diffusion coefficient D and the osmotic compressibility of semidilute hyaluronan solutions containing different ratios of sodium and calcium ions are compared with simple polyelectrolyte models. Scaling relationships are proposed in terms of polymer concentration and ionic strength J of the added salt. Differences in the effects of sodium and calcium ions are found to be expressed only through J.

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confidence: 44%

Scaling Equations for a Biopolymer in Salt Solution

2007

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“… where m is the concentration in mol kg −1 , subscript 1 and 2 are for the corresponding binary solutions. A and B values were taken from 22 , 29 and the other coefficients of the model are calculated by fitting binary data to the corresponding equation for binary mixture as below. …”

Section: Resultsmentioning

confidence: 99%

Experimental measurements and modelling of viscosity and density of calcium and potassium chlorides ternary solutions

Arshad

Easa

Qiblawey

et al. 2020

Sci Rep

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Measured viscosity and density data for ternary aqueous solutions of CaCl2 and KCl are presented at temperatures between 293 and 323 K with 5 K increment. A modified Jones–Dole was introduced by adding extra terms and proved to be suitable for modelling of the viscosity data. Goldsack and Franchetto, Hu and Exponential models are used to correlate the viscosity data, too. Al models are correlated as a function of temperature and concentration. All models had successfully predicted the viscosity with high precision reaching a maximum average absolute deviation (AAD) of less than 2.3%. The modified Jones–Dole showed the best results among other models. Viscosity of the ternary solution is higher than the viscosity of water by about 15% at low concentrations and reaches about 270% at the highest concentrations. The amount of CaCl2 has more significant effect on the ternary mixture viscosity compared to KCl. This has created difficulty in measuring the viscosity and consequently the challenge in finding the different models parameters. Ternary solution densities were successfully correlate with Kumar’s model with AAD of less than 0.4%. Comparison of the ternary solution density and viscosity with the few available data literature showed a good agreement.

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“…This model may be used to predict the vapor-pressure of any geothermal fluid sample with the main components of Cl -, Na + , Ca + , K + , SO 4 -2 , S + , and Si + , using only pure water data and concentration of the ion species. Riedel [38] used the same correlation model for the thermal conductivity of multi-component aqueous salt solutions, achieving a good prediction agreement (within 5%) with the experimental data for several aqueous salt solutions [39][40][41][42][52][53][54][55][56][57][58][59][60][61]. Several authors have examined the accuracy and predictive capability of the Riedel's model (see also, review by Horvath [39]).…”

Section: T/k P/kpa T / K P/kpa T / K P/kpamentioning

confidence: 99%

Experimental Vapor-Pressures and Derived Thermodynamic Properties of Geothermal Fluids from Baden-Baden Geothermal Field (Southeastern Germany)

Talybov¹,

Azizova²,

Abdulagatov³

2019

jept

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Background: In the present study, vapor-pressures of three geothermal fluids from Baden-Baden geothermal field (Kirchenstollen, Friedrichstollen, and Murquelle, southeastern region of Germany) were measured over the temperature range of 274-413 K. The combined expanded uncertainty of the temperature and vapor-pressure measurements at 95% confidence level with a coverage factor of k = 2 were estimated to be 0.01 K and 1-3 Pa at low and 10-30 Pa at high temperatures, respectively. The measured values of vaporpressure were used to calculate other crucial derived thermodynamic properties of these geothermal fluid samples, such as enthalpy and entropy of vaporization and the heat capacity. Methods: The measurements were performed using two different methods and experimental apparatus: (1) absolute and differential static method which was used at low

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Viscosity of aqueous calcium chloride solutions at high temperatures and high pressures

Cited by 62 publications

References 64 publications

Scaling Equations for a Biopolymer in Salt Solution

Scaling Equations for a Biopolymer in Salt Solution

Experimental measurements and modelling of viscosity and density of calcium and potassium chlorides ternary solutions

Experimental Vapor-Pressures and Derived Thermodynamic Properties of Geothermal Fluids from Baden-Baden Geothermal Field (Southeastern Germany)

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