Thermodynamik flüssiger Mischungen von Kohlenwasserstoffen mit verwandten Substanzen

Kehiaian, H.V.

doi:10.1002/bbpc.19770811007

Cited by 93 publications

(12 citation statements)

References 104 publications

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“…Note that the Redlich-Kister equation, Eq. 280, may also be transformed into an alternative, equivalent polynomial known as the 4-suffix Margules equation [1,17] In 1964 Wilson suggested a novel equation for G E by introducing the local mole fraction of component i in a mixture {i + j} [198], a concept which has been developed impressively since then [137,[199][200][201][202][203][204][205][206][207][208][209]. For a binary mixture, the molar excess Gibbs energy is given by and the activity coefficients are Thus, at infinite dilution we obtain An iterative procedure is required to evaluate the adjustable parameters Λ 12 and Λ 21 .…”

Section: Excess Molar Gibbs Energy and Lewis-randall Activity Coefficients (In Particular At Infinite Dilution)mentioning

confidence: 99%

“…Enormous research efforts have been invested in developing the local composition concept, for instance in developing the NRTL equation, the UNIQUAC and UNIFAC formalism, and the DISQUAC model [137,[199][200][201][202][203][204][205][206][207][208][209]. This topic definitely deserves a review of its own.…”

Section: Excess Molar Gibbs Energy and Lewis-randall Activity Coefficients (In Particular At Infinite Dilution)mentioning

confidence: 99%

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Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

Wilhelm¹

2021

J Solution Chem

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The liquid state is one of the three principal states of matter and arguably the most important one; and liquid mixtures represent a large research field of profound theoretical and practical interest. This topic is of importance in many areas of the applied sciences, such as in chemical engineering, geochemistry, the environmental sciences, biophysics and biomedical technology. First, I will concisely present a review of important concepts from classical thermodynamics of nonelectrolyte solutions; this will be followed by a survey of (semi-)empirical approaches to representing the composition and temperature dependence of selected thermodynamic mixture properties, and finally the focus will be on dilute binary nonelectrolyte solutions where one component, a supercritical solute, is present in much smaller quantity than the other component, called the solvent. Partial molar properties in the limit of infinite dilution (indicated by a superscript ∞) are of particular interest. For instance, activity coefficients (Lewis–Randall (LR) convention) are customarily used to characterize mixing behavior, and infinite-dilution values $$\gamma_{i}^{{{\text{LR,}}\infty }}$$ γ i LR, ∞ provide a convenient route for obtaining binary parameters for several popular solution models. When discussing solute (j)—solvent (i) interactions in solutions where the solute is supercritical, the Henry fugacity $$h_{j,i} \left( {T,P} \right)$$ h j , i T , P , also known as Henry’s law (HL) constant, is a measurable thermodynamic key quantity. Its temperature dependence yields information on the partial molar enthalpy change on solution $$\Delta H_{j}^{\infty } \left( {T,P} \right)$$ Δ H j ∞ T , P , while its pressure dependence yields information on the partial molar volume $$V_{j}^{{{\text{L,}}\infty }} \left( {T,P} \right)$$ V j L, ∞ T , P of solute j in the liquid phase (superscript L). I will clarify issues frequently overlooked, touch upon solubility data reduction and correlation, report a few recent high-precision experimental results on dilute aqueous solutions of supercritical nonelectrolytes, and show the equivalency of results for caloric quantities (e.g. $$\Delta H_{j}^{\infty }$$ Δ H j ∞ ) obtained via van ’t Hoff analysis of high-precision solubility data with directly measured calorimetric data.

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Section: Excess Molar Gibbs Energy and Lewis-randall Activity Coefficients (In Particular At Infinite Dilution)mentioning

confidence: 99%

Section: Excess Molar Gibbs Energy and Lewis-randall Activity Coefficients (In Particular At Infinite Dilution)mentioning

confidence: 99%

Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

Wilhelm¹

2021

J Solution Chem

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“…This deviation is understandable from the fact that the induced dipole interaction between the alkyl parts of the alkane and the alkanol has not been taken into account in the calculations. It is expected that the inclusion of a dispersion term, as has been done in the DISQUAC [8,36], will improve the prediction of the excess enthalpy. Fig.…”

Section: Cosmospacementioning

confidence: 99%

“…Both theoretical models contain, besides the mole and volume fraction, the surface fraction and require as additional parameter the number of nearest neighbors for each compounds. Abrams and Prausnitz [6] and Magnussen et al [7] derived from the Staverman-Guggenheim (SG) entropy expressions for the activity coefficient, which have been applied in the combinatorial term of the UNIQUAC [6], DISQUAC [8], UNIFAC [9,10], COSMOSAC [11], COSMOSPACE [12] and MOQUAC [13] models. In this paper we show that from the Guggenheim entropy of mixing an alternative expression for the combinatorial activity coefficient equation can be obtained, and thereby a new formula for the number of nearest neighbors.…”

Section: Introductionmentioning

confidence: 99%

On the calculation of nearest neighbors in activity coefficient models

Krooshof

Tuinier

2018

Fluid Phase Equilibria

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DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

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“…Значения поверхностей ( qs ) и объемов (r s ) групп, выраженные в единицах стандартного сегмента (Л ст =3,13Х 10 8 z, V CT =2,366 ( z-1) [ п ]), определены для z=lo (табл. 1).…”

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Расчет Термодинамических Свойств Систем, Содержащих Алкены, С Помощью Групповых Моделей Раствора 2. Квазихимическая Групповая Модель

Kirss¹,

Kudryavtseva²,

Kuus³

et al. 1987

Proceedings of the Academy of Sciences of the Estonian SSR. Che

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241eesti nsv teaduste akadeemia toimetised, keemia ИЗВЕСТИЯ АКАДЕМИИ НАУК ЭСТОНСКОЙ ССР. ХИМИЯ * Предполагается, что наиболее вероятные значения чисел пар контактных участков (ЛД'Л), отвечающие максимальному члену статистической суммы, подчиняются квазихимическому уравнению (5).

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Thermodynamik flüssiger Mischungen von Kohlenwasserstoffen mit verwandten Substanzen

Cited by 93 publications

References 104 publications

Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

On the calculation of nearest neighbors in activity coefficient models

Расчет Термодинамических Свойств Систем, Содержащих Алкены, С Помощью Групповых Моделей Раствора 2. Квазихимическая Групповая Модель

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