A Static Sorption Technique for Vapor Solubility Measurements

Palamara, John E.; Davis, Peter K.; Suriyapraphadilok, Uthaiporn; Danner, Ronald P.; Kitzhoffer, and Ronald J.; Zielinski, John M.

doi:10.1021/ie0207414

Cited by 8 publications

(10 citation statements)

References 24 publications

(28 reference statements)

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“…In a static sorption method, the mass of gas dissolved in liquid is determined by weighing the diffusion cell before and after the experiment. [ 17,18 ] Experimental measurements in this category are rather difficult to carry out. Also, it is hard to utilize these methods to obtain gas diffusivity in a liquid at very low gas concentration, or with low gas solubility.…”

Section: Methods For Diffusivity Determinationmentioning

confidence: 99%

Experimental determination of gas diffusivity in liquids—A review

Upreti

Mehrotra

2021

Can J Chem Eng

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Unit operations and processes abound with gas diffusion in liquids, which is a sophisticated phenomenon in which mass transfer is characterized by diffusion coefficient or diffusivity. Compared to diffusion in gas phase, the closely packed liquid molecules strongly influence diffusive mass transfer to the extent that it is impossible to have a general theory for a reasonably accurate estimation of diffusivity in liquids. This situation is further compounded by the fact that diffusivity cannot be measured directly but can only be estimated indirectly with the help of a number of observable properties (eg, mass, volume, pressure, etc). This fact gives rise to a myriad of experimental methods for the determination of gas diffusivity in liquids. These methods report gas diffusivities over widely varying ranges of temperature, pressure, and liquid composition. To provide a state‐of‐the‐art knowledge base for such methods is the objective of this work. The focus is on gas diffusion in binary gas‐liquid systems. Starting with necessary theoretical foundations, we provide a systematic categorization of these methods based on the property change utilized for diffusivity determination. The methods are then concisely described, and the diffusivity data are summarized for over 160 gas‐liquid systems at different temperature and pressure conditions. Empirical correlations are provided for different gas‐liquid systems, which could be used for interpolating gas diffusivity as a function of temperature, pressure, and composition.

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Section: Methods For Diffusivity Determinationmentioning

confidence: 99%

Experimental determination of gas diffusivity in liquids—A review

Upreti

Mehrotra

2021

Can J Chem Eng

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“…The data acquisition compiled the temperature and differential pressure versus time. The volumes of the chambers were obtained by the measurement of the amount of gas expanded from a known capsule volume 4. Subtracting the volume of the sample at the experimental temperature from the volume of the sample chamber resulted in the volume of headspace.…”

Section: Methodsmentioning

confidence: 99%

Solubility and diffusivity measurements in nitrogen–poly(vinyl acetate) and nitrogen–toluene–poly(vinyl acetate) systems with the differential pressure decay technique

Pourdarvish

Danner

2008

J of Applied Polymer Sci

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ABSTRACT:In creating thin films of polymers by solution processing, a common problem is the undesirable formation of bubbles during the drying process. Practical experience shows that bubbles can be created well below the boiling point of the solvent. Also, it has been observed that the degassing of the polymer solutions results in reduced bubble formation, and this indicates a relationship between the presence of air and bubble formation. This work is based on the hypothesis that if the solubility of air in the polymer solution increases with the solvent concentration, then the solution can become supersaturated with air as the concentration of the solvent is reduced during the drying process. To test this hypothesis, knowledge of the thermodynamics of the mixture is required. This study concentrated on the system of poly(vinyl acetate), toluene, and nitrogen. A thermodynamic model to predict phase behavior of this system was developed. The solubility of nitrogen in poly(vinyl acetate) and poly(vinyl acetate)-toluene as a function of the toluene composition over wide ranges of temperatures and pressures was measured with the pressure decay technique. The group-contribution lattice-fluid equation of state was employed to correlate the thermodynamic behavior of the binary and ternary systems. In addition, experiments were conducted to measure the diffusion coefficients of the nitrogen in poly(vinyl acetate).

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“…The details of the experimental protocol for this technique have been presented in the literature. 7 This method does not provide diffusivity data. A sequential set of five CO 2 sorption runs was made.…”

Section: Static Capsule Absorption Studiesmentioning

confidence: 99%

Solubility of carbon dioxide and cosolvents in a photoresist polymer

Balashova

Russell

Danner

2008

J of Applied Polymer Sci

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Solubility and diffusivity of cosolvents and carbon dioxide in a photoresist polymer have been measured below the glass transition temperature by the inverse gas chromatography and static capsule methods over a temperature range of 75-1008C and pressures up to 7000 kPa. The results showed that presence of even low pressures of CO 2 increased the solubility and diffusivity of the cosolvents studied. Experiments in which exposure of the polymer to CO 2 was cycled on and off indicated that the free volume introduced by the CO 2 persisted in the polymer for a significant time after removal of the CO 2 .

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A Static Sorption Technique for Vapor Solubility Measurements

Cited by 8 publications

References 24 publications

Experimental determination of gas diffusivity in liquids—A review

Experimental determination of gas diffusivity in liquids—A review

Solubility and diffusivity measurements in nitrogen–poly(vinyl acetate) and nitrogen–toluene–poly(vinyl acetate) systems with the differential pressure decay technique

Solubility of carbon dioxide and cosolvents in a photoresist polymer

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