Solubility of small-chain carboxylic acids in supercritical carbon dioxide

Sparks, Darrell L.; Estevez, L. Antonio; Hernandez, Rafael; McEwen, Jason; French, Todd

doi:10.1021/je100504h

Title: Solubility of small-chain carboxylic acids in supercritical carbon dioxide

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Abstract

The solubility of heptanoic acid and octanoic acid in supercritical carbon dioxide has been determined at temperatures of (313.15, 323.15, and 333.15) K over a pressure range of (8.5 to 30.0) MPa, depending upon the solute. The solubility of heptanoic acid ranged from a solute concentration of (0.08 ± 0.03) kg • m^-3 (T = 323.15 K, p = 8.5 MPa) to (147 ± 0.2) kg • m^-3 (T = 323.15 K, p = 20.0 MPa). The lowest octanoic acid solubility obtained was a solute concentration of (0.40 ± 0.1) kg • m^-3 (T = 333.15 K, p = 10.0 MPa), while the highest solute concentration was (151 ± 2) kg • m^-3 (T = 333.15 K, p = 26.7 MPa). In addition, solubility experiments were performed for nonanoic acid in supercritical carbon dioxide at 323.15 K and pressures of (10.0 to 30.0) MPa to add to the solubility data previously published by the authors. In general, carboxylic acid solubility increased with increasing solvent density. The results also showed that the solubility of the solutes decreased with increasing molar mass at constant supercritical-fluid density. Additionally, the efficacy of Chrastil's equation and other density-based models was evaluated for each fatty acid.

Authors:

Sparks, Darrell L. ^[1]; Estevez, L. Antonio ^[2]; Hernandez, Rafael ^[1]; McEwen, Jason ^[1]; French, Todd ^[1]

Mississippi State Univ., Mississippi State, MS (United States)
Univ. of Puerto Rico, Mayaguez (Puerto Rico)

Publication Date:: 2010-07-08

Research Org.:: Mississippi State Univ., Mississippi State, MS (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1079590

Report Number(s):: DOE/GO-8602531
Journal ID: ISSN 0021-9568

Grant/Contract Number:: FG36-06GO86025

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Chemical and Engineering Data

Additional Journal Information:: Journal Volume: 55; Journal Issue: 11; Journal ID: ISSN 0021-9568

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; HEPTANOIC ACID; NONANOIC ACID; OCTANOIC ACID; PRESSURE RANGE; density-based model; fluid densities; heptanoic acid; nonanoic acid; octanoic acids; pressure ranges; solubility data; solute concentrations; solvent density; super-critical; supercritical carbon dioxides

Citation Formats


                    Sparks, Darrell L., Estevez, L. Antonio, Hernandez, Rafael, McEwen, Jason, and French, Todd. Solubility of small-chain carboxylic acids in supercritical carbon dioxide.  United States: N. p., 2010. 
Web.  doi:10.1021/je100504h.

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                    Sparks, Darrell L., Estevez, L. Antonio, Hernandez, Rafael, McEwen, Jason, & French, Todd. Solubility of small-chain carboxylic acids in supercritical carbon dioxide.  United States.  https://doi.org/10.1021/je100504h

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                    Sparks, Darrell L., Estevez, L. Antonio, Hernandez, Rafael, McEwen, Jason, and French, Todd. Thu .  
"Solubility of small-chain carboxylic acids in supercritical carbon dioxide".  United States.  https://doi.org/10.1021/je100504h.  https://www.osti.gov/servlets/purl/1079590.

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@article{osti_1079590,

  title        = {Solubility of small-chain carboxylic acids in supercritical carbon dioxide},

  author       = {Sparks, Darrell L. and Estevez, L. Antonio and Hernandez, Rafael and McEwen, Jason and French, Todd},

  abstractNote = {The solubility of heptanoic acid and octanoic acid in supercritical carbon dioxide has been determined at temperatures of (313.15, 323.15, and 333.15) K over a pressure range of (8.5 to 30.0) MPa, depending upon the solute. The solubility of heptanoic acid ranged from a solute concentration of (0.08 ± 0.03) kg • m-3 (T = 323.15 K, p = 8.5 MPa) to (147 ± 0.2) kg • m-3 (T = 323.15 K, p = 20.0 MPa). The lowest octanoic acid solubility obtained was a solute concentration of (0.40 ± 0.1) kg • m-3 (T = 333.15 K, p = 10.0 MPa), while the highest solute concentration was (151 ± 2) kg • m-3 (T = 333.15 K, p = 26.7 MPa). In addition, solubility experiments were performed for nonanoic acid in supercritical carbon dioxide at 323.15 K and pressures of (10.0 to 30.0) MPa to add to the solubility data previously published by the authors. In general, carboxylic acid solubility increased with increasing solvent density. The results also showed that the solubility of the solutes decreased with increasing molar mass at constant supercritical-fluid density. Additionally, the efficacy of Chrastil's equation and other density-based models was evaluated for each fatty acid.},

  doi          = {10.1021/je100504h},

  journal      = {Journal of Chemical and Engineering Data},

  number       = 11,

  volume       = 55,

  place        = {United States},

  year         = {2010},

  month        = {7}

}

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