CHAPTER 9. Partial Molar Volumes of Gases Dissolved in Liquids

Wilhelm, Emmerich; Battino, Rubin

doi:10.1039/9781782627043-00273

Cited by 4 publications

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“…Based on this equation, with the aid of the Pxy data, H can be obtained by extrapolating isotherms plotted as a function of x in the limit x → 0, as described by Wilhelm and Battino . This approach is adopted in the present study.…”

Section: Methodsmentioning

confidence: 99%

“…The aim of the present study is to address the above knowledge gap by deriving Henry’s law constants from the VLE measurements for the typical to CCUS noncondensable gases mixed with CO 2 . At the infinite dilution limit, the Henry constants can be obtained from the slope of the bubble line in the Px diagrams or with the aid of the Pxy datausing the vapor–liquid ratios y / x extrapolated to the zero dilution limit . The latter approach is applied in the present study to determine Henry’s law constants for noncondensable gases, namely, nitrogen (N 2 ), oxygen (O 2 ), hydrogen (H 2 ), methane (CH 4 ), argon (Ar), and carbon monoxide (CO), which are typically found in CO 2 streams captured from industrial installations, fossil fuel power plants, and oil refineries …”

Section: Introductionmentioning

confidence: 99%

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Henry’s Law Constants and Vapor–Liquid Distribution Coefficients of Noncondensable Gases Dissolved in Carbon Dioxide

2022

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The accurate determination of the solubilities of the typical impurity gases present in captured CO2 in the carbon capture, utilization, and storage chain is an essential prerequisite for the successful modeling of the CO2 stream thermodynamic properties. In this paper, Henry’s law constants and the vapor–liquid distribution coefficients of six noncondensable gases, namely, N2, O2, H2, CH4, Ar, and CO, at infinite dilution in liquid CO2 are derived based on published vapor–liquid equilibrium data at temperatures ranging from the triple point (216.59 K) to the critical point (304.13 K) of CO2. The temperature dependence of Henry’s law constants of the six gases is correlated using approximating functions previously proposed for aqueous solutions. A correlation that provides the best fit for the Henry constants data for all the six gases, with the accuracy (absolute average deviation %) of 4.2%, is recommended. For N2, O2, H2, Ar, and CO, the combined standard uncertainty in the derived Henry constants is less than 6%, whereas for CH4, due to a larger deviation between the utilized data, the uncertainty is less than 18%. Analysis of the temperature variation of the vapor–liquid distribution coefficient at infinite dilution shows that when all the six gases are present in the CO2 stream, separation of N2, O2, Ar, and CO from CO2 can be problematic due to their similar volatilities, while the distinct volatilities of H2 and CH4 at lower temperatures make their separation from CO2 easier.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Henry’s Law Constants and Vapor–Liquid Distribution Coefficients of Noncondensable Gases Dissolved in Carbon Dioxide

2022

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“…In equation ( 6) the exponential terms, known as Poynting correction factors, can be expected to depart from unity at pressures above the saturation pressure of the solvent (𝑝 > 𝑝 1,𝑠𝑎𝑡 ) or near the critical point of the solvent [14]. While accurate evaluation of these terms at high pressures and close to the critical region is challenging, for practical estimations outside the vicinity of the critical point, approximations have been developed [15]. In particular, assuming 𝑉 ̂1𝐿 is approximately constant within the pressure range (𝑝 1,𝑠𝑎𝑡 , 𝑝), the Poynting integral in the first term on the right hand side in equation (6), can be approximated as:…”

Section: Model B: Vle Model For Small Dilutionsmentioning

confidence: 99%

Application of the Henry's law model for prediction of the vapour-liquid equilibria in impure CO2 streams

2022

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“…The exponential in Eq. 306 is known as Poynting correction factor; its evaluation requires reliable data on the partial molar volume of the solute at infinite dilution [224][225][226][227][228][229][230][231][232][233][234][235][236].…”

Section: Henry's Law: An Alternative Ideal-solution Model For Liquid Systemsmentioning

confidence: 99%

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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CHAPTER 9. Partial Molar Volumes of Gases Dissolved in Liquids

Cited by 4 publications

References 115 publications

Henry’s Law Constants and Vapor–Liquid Distribution Coefficients of Noncondensable Gases Dissolved in Carbon Dioxide

Henry’s Law Constants and Vapor–Liquid Distribution Coefficients of Noncondensable Gases Dissolved in Carbon Dioxide

Application of the Henry's law model for prediction of the vapour-liquid equilibria in impure CO2 streams

Solutions, in Particular Dilute Solutions of Nonelectrolytes: A Review

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