Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength
© 2018 American Chemical Society. The acid dissociation constants (pKa) of four organic acids (formic, acetic, propanoic, and butanoic) commonly found in monoethylene glycol (MEG) regeneration systems and methyldiethanolamine (MDEA) were measured via potentiometric titration. Dissociation constants...
| Main Authors: | , , , |
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| Format: | Journal Article |
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American Chemical Society
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/71279 |
| _version_ | 1848762438252494848 |
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| author | Soames, A. Iglauer, Stefan Barifcani, Ahmed Gubner, Rolf |
| author_facet | Soames, A. Iglauer, Stefan Barifcani, Ahmed Gubner, Rolf |
| author_sort | Soames, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018 American Chemical Society. The acid dissociation constants (pKa) of four organic acids (formic, acetic, propanoic, and butanoic) commonly found in monoethylene glycol (MEG) regeneration systems and methyldiethanolamine (MDEA) were measured via potentiometric titration. Dissociation constants were measured within varying concentration of MEG solution (0, 30, 40, 50, 60, 70, and 80 wt %) and at varying temperature (25, 30, 40, 50, 60, 70, and 80 °C). Thermodynamic properties of the dissociation process including Gibbs free energy (?G° kJ mol-1), standard enthalpy (?H° kJ mol-1), and entropy (?S° kJ mol-1K-1) were calculated at 25 °C using the van't Hoff equation. Comparison of the reported experimental pKavalues and calculated thermodynamic properties in aqueous solution to the literature demonstrated good agreement. Two models have been proposed to calculate the pKaof acetic acid and MDEA within MEG solutions of varying concentration, temperature, and ionic strength. The proposed models have an average error of 0.413% and 0.265% for acetic acid and MDEA, respectively. |
| first_indexed | 2025-11-14T10:47:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-71279 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:47:34Z |
| publishDate | 2018 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-712792019-04-02T05:19:18Z Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength Soames, A. Iglauer, Stefan Barifcani, Ahmed Gubner, Rolf © 2018 American Chemical Society. The acid dissociation constants (pKa) of four organic acids (formic, acetic, propanoic, and butanoic) commonly found in monoethylene glycol (MEG) regeneration systems and methyldiethanolamine (MDEA) were measured via potentiometric titration. Dissociation constants were measured within varying concentration of MEG solution (0, 30, 40, 50, 60, 70, and 80 wt %) and at varying temperature (25, 30, 40, 50, 60, 70, and 80 °C). Thermodynamic properties of the dissociation process including Gibbs free energy (?G° kJ mol-1), standard enthalpy (?H° kJ mol-1), and entropy (?S° kJ mol-1K-1) were calculated at 25 °C using the van't Hoff equation. Comparison of the reported experimental pKavalues and calculated thermodynamic properties in aqueous solution to the literature demonstrated good agreement. Two models have been proposed to calculate the pKaof acetic acid and MDEA within MEG solutions of varying concentration, temperature, and ionic strength. The proposed models have an average error of 0.413% and 0.265% for acetic acid and MDEA, respectively. 2018 Journal Article http://hdl.handle.net/20.500.11937/71279 10.1021/acs.jced.8b00221 American Chemical Society restricted |
| spellingShingle | Soames, A. Iglauer, Stefan Barifcani, Ahmed Gubner, Rolf Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength |
| title | Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength |
| title_full | Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength |
| title_fullStr | Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength |
| title_full_unstemmed | Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength |
| title_short | Acid Dissociation Constant (pKa) of Common Monoethylene Glycol (MEG) Regeneration Organic Acids and Methyldiethanolamine at Varying MEG Concentration, Temperature, and Ionic Strength |
| title_sort | acid dissociation constant (pka) of common monoethylene glycol (meg) regeneration organic acids and methyldiethanolamine at varying meg concentration, temperature, and ionic strength |
| url | http://hdl.handle.net/20.500.11937/71279 |