Comparison of models for the relative static permittivity with the e-CPA equation of state

Olsen, Martin Due; Kontogeorgis, Georgios M.; Solms, Nicolas von

doi:10.1016/j.fluid.2022.113632

Cited by 11 publications

(25 citation statements)

References 55 publications

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“…Our results point out that the derivatives of relative permittivity are by no means naturally canceled at any level or should be disregarded as being of low magnitude, both for DH and Born equations, contrary to some previous comments. , We highlight that some recent studies also note that the derivatives of relative permittivity have a great impact on the activity coefficients of electrolyte solutions. , …”

Section: Discussioncontrasting

confidence: 76%

“…87,88 We highlight that some recent studies also note that the derivatives of relative permittivity have a great impact on the activity coefficients of electrolyte solutions. 31,33 In order to better understand the magnitude of the terms which contain the relative permittivity derivatives with respect to composition, we present the relative contributions in Figure 7.…”

Section: The Ionic Cloud Charging Process�connecting the Debye And Gu...mentioning

confidence: 99%

“…The charging process is present at the core derivation of famous electrolyte theories, such as the Debye–Hückel equation (DH), Hückel equation, Born equation, Mean Spherical Approximation, − and Gronwall-LaMer-Sandved . Therefore, it influences derived and extended equations from the previous ones, such as the Pitzer-Debye–Hückel equation. , These theories are used in electrolyte Equations-of-State ,,− ,− (e-EoS) to account for the electrostatic contributions of the system.…”

Section: Introductionmentioning

confidence: 99%

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The Connection between the Debye and Güntelberg Charging Processes and the Importance of Relative Permittivity: The Ionic Cloud Charging Process

Silva

Kontogeorgis

2023

J. Chem. Eng. Data

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The Debye and Güntelberg Charging Processes are essential tools for deriving electrolyte solutions’ activity coefficient models. The Debye–Hückel, Born, and Mean Spherical Approximation are among some famous theories derived via charging processes. How they relate to each other, or if both charging processes are equivalent, or even if both are consistent, has been a matter of discussion in the literature for many years. In this work, we evaluate the results from both charging processes using the Debye–Hückel and the Born equations, using different dependencies of the relative permittivity concerning salt concentration, temperature, and partial charging variable. Our results show that both charging processes are connected through a charging process here called the Ionic Cloud Charging Process. We show how these three charging processes relate to each other, verifying the magnitude of the derivatives of relative permittivity on the final models and their origin from the Ionic Cloud Charging Process.

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Section: Discussioncontrasting

confidence: 76%

Section: The Ionic Cloud Charging Process�connecting the Debye And Gu...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Connection between the Debye and Güntelberg Charging Processes and the Importance of Relative Permittivity: The Ionic Cloud Charging Process

Silva

Kontogeorgis

2023

J. Chem. Eng. Data

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show abstract

“…A lot of different models have been proposed to describe thermodynamic properties of electrolyte solutions [4], including both activity coefficient models [5][6][7][8][9] and equations of state (EoS) [4,[10][11][12][13]. Comparisons of different types of models on a fair basis is important to different permittivity models for e-CPA [26], e-PPC-SAFT [27] and SAFT-VR-Mie [28].…”

Section: Introductionmentioning

confidence: 99%

“…Both models have previously shown good results for various properties. The e-CPA model is based on the implementation used in previous works from the group of DTU [10,26,[29][30][31][32]. The e-PPC-SAFT model is done with the implementation from the group of IFPEN [27,33,34].…”

Section: Introductionmentioning

confidence: 99%