Protonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures

Simple item page
avondale-bepress-to-dspace.facultyScience
avondale-bepress-to-dspace.peer_review_statusPeer reviewed before publication
avondale-bepress.abstract<p>Amino acid salts have greater potential for CO<sub>2</sub> capture at high temperatures than typical amine-based absorbents because of their low volatility, high absorption rate, and high oxidative stability. The protonation constant (p<em>K</em><sub>a</sub>) of an amino acid salt is crucial for CO<sub>2</sub> capture, as it decreases with increasing absorption temperature. However, published p<em>K</em><sub>a</sub> values of amino acid salts have usually been determined at ambient temperatures. In this study, the p<em>K</em><sub>a</sub> values of 11 amino acid salts were determined in the temperature range of 298–353 K using a potentiometric titration method. The standard-state molar enthalpies (Δ<em>H</em><sub>m</sub><sup>0</sup>) and entropies (Δ<em>S</em><sub>m</sub><sup>0</sup>) of the protonation reactions were also determined by the van’t Hoff equation. It was found that sarcosine can maintain a higher p<em>K</em><sub>a</sub> than the other amino acids studied at high temperatures. We also found that the CO<sub>2</sub> solubilities and overall mass-transfer coefficients of 5 <em>m</em>′ sarcosinate (moles of sarcosine per kilogram of solution) at 333–353 K are higher than those of 30% MEA at 313–353 K. These results show that some possible benefits can be produced from the use of sarcosine as a fast solvent for CO<sub>2</sub> absorption at high temperatures. However, the pronotation reaction of sarcosine is the least exothermic among those of all amino acids studied. This could lead to a high regeneration energy consumption in the sarcosinate-based CO<sub>2</sub> capture process</p>
avondale-bepress.articleid1098
avondale-bepress.authorsNan Yang
avondale-bepress.authorsDong-Yao Xu
avondale-bepress.authorsChiao-Chien Wei
avondale-bepress.authorsGraeme Puxty
avondale-bepress.authorsHai Yu
avondale-bepress.authorsMarcel Maeder
avondale-bepress.authorsSarah Norman
avondale-bepress.authorsPaul Feron
avondale-bepress.context-key12530382
avondale-bepress.coverpage-urlhttps://research.avondale.edu.au/sci_math_papers/92
avondale-bepress.document-typearticle
avondale-bepress.field.author_faculty_disciplineScience
avondale-bepress.field.comments<p>Used by permission: the author(s)</p> <p>The document available for download is the accepted manuscript version of this article. The final published version may be accessed from the publisher <a href="http://dx.doi.org/10.1021/ie502256m">here</a>.</p>
avondale-bepress.field.custom_citation<p>Yang, N., Xu, D., Wei, C., Puxty, G., Yu, H., Maeder, M., Norman, S., & Feron, P. (2014).<strong> </strong>Protonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures. <em>Industrial & Engineering Chemistry Research, 53</em>(32),12848-12855. doi:10.1021/ie502256m<strong></strong></p>
avondale-bepress.field.doihttps://doi.org/10.1021/ie502256m
avondale-bepress.field.embargo_date2018-07-23T00:00:00Z
avondale-bepress.field.field_of_education01 Natural and Physical Sciences
avondale-bepress.field.for03 CHEMICAL SCIENCES
avondale-bepress.field.issn0888-5885
avondale-bepress.field.issue_number32
avondale-bepress.field.journalIndustrial & Engineering Chemistry Research
avondale-bepress.field.page_numbers12848-12855
avondale-bepress.field.peer_reviewBefore publication
avondale-bepress.field.publication_date2014-07-11T00:00:00Z
avondale-bepress.field.source_publication<p>This article was originally published as:</p> <p>Yang, N., Xu, D., Wei, C., Puxty, G., Yu, H., Maeder, M., Norman, S., & Feron, P. (2014).<strong> </strong>Protonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures. <em>Industrial & Engineering Chemistry Research, 53</em>(32),12848-12855. doi:10.1021/ie502256m<strong><br /></strong></p> <p>ISSN: 1520-5045<strong><br /> </strong></p>
avondale-bepress.field.staff_classificationContract
avondale-bepress.field.volume_number53
avondale-bepress.fulltext-urlhttps://research.avondale.edu.au/cgi/viewcontent.cgi?article=1098&amp;context=sci_math_papers&amp;unstamped=1
avondale-bepress.keywordsCO2 capture
avondale-bepress.keywordsamino acid salts
avondale-bepress.keywordsprotonation constants (pKa)
avondale-bepress.keywordsstandard molar enthalpy of protonation
avondale-bepress.keywordsstandard molar entropy of protonation
avondale-bepress.keywordshigh temperature absorption
avondale-bepress.keywordssarcosine
avondale-bepress.label92
avondale-bepress.publication-date2014-07-11T00:00:00Z
avondale-bepress.publication-titleScience and Mathematics Papers and Journal Articles
avondale-bepress.statepublished
avondale-bepress.submission-date2018-07-23T21:29:59Z
avondale-bepress.submission-pathsci_math_papers/92
avondale-bepress.titleProtonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures
avondale-bepress.typearticle
dc.contributor.authorFeron, Paul
dc.contributor.authorNorman, Sarah
dc.contributor.authorMaeder, Marcel
dc.contributor.authorYu, Hai
dc.contributor.authorPuxty, Graeme
dc.contributor.authorWei, Chiao-Chien
dc.contributor.authorXu, Dong-Yao
dc.contributor.authorYang, Nan
dc.date.accessioned2023-11-01T00:27:04Z
dc.date.available2023-11-01T00:27:04Z
dc.date.issued2014-07-11
dc.date.submitted2018-07-23T21:29:59Z
dc.description.abstract<p>Amino acid salts have greater potential for CO<sub>2</sub> capture at high temperatures than typical amine-based absorbents because of their low volatility, high absorption rate, and high oxidative stability. The protonation constant (p<em>K</em><sub>a</sub>) of an amino acid salt is crucial for CO<sub>2</sub> capture, as it decreases with increasing absorption temperature. However, published p<em>K</em><sub>a</sub> values of amino acid salts have usually been determined at ambient temperatures. In this study, the p<em>K</em><sub>a</sub> values of 11 amino acid salts were determined in the temperature range of 298–353 K using a potentiometric titration method. The standard-state molar enthalpies (Δ<em>H</em><sub>m</sub><sup>0</sup>) and entropies (Δ<em>S</em><sub>m</sub><sup>0</sup>) of the protonation reactions were also determined by the van’t Hoff equation. It was found that sarcosine can maintain a higher p<em>K</em><sub>a</sub> than the other amino acids studied at high temperatures. We also found that the CO<sub>2</sub> solubilities and overall mass-transfer coefficients of 5 <em>m</em>′ sarcosinate (moles of sarcosine per kilogram of solution) at 333–353 K are higher than those of 30% MEA at 313–353 K. These results show that some possible benefits can be produced from the use of sarcosine as a fast solvent for CO<sub>2</sub> absorption at high temperatures. However, the pronotation reaction of sarcosine is the least exothermic among those of all amino acids studied. This could lead to a high regeneration energy consumption in the sarcosinate-based CO<sub>2</sub> capture process</p>
dc.description.versionBefore publication
dc.identifier.citation<p>Yang, N., Xu, D., Wei, C., Puxty, G., Yu, H., Maeder, M., Norman, S., & Feron, P. (2014).<strong> </strong>Protonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures. <em>Industrial & Engineering Chemistry Research, 53</em>(32),12848-12855. doi:10.1021/ie502256m<strong></strong></p>
dc.identifier.doihttps://doi.org/10.1021/ie502256m
dc.identifier.issn0888-5885
dc.identifier.urihttps://research.avondale.edu.au/handle/123456789/12530382
dc.language.isoen_us
dc.provenance<p>This article was originally published as:</p> <p>Yang, N., Xu, D., Wei, C., Puxty, G., Yu, H., Maeder, M., Norman, S., & Feron, P. (2014).<strong> </strong>Protonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures. <em>Industrial & Engineering Chemistry Research, 53</em>(32),12848-12855. doi:10.1021/ie502256m<strong><br /></strong></p> <p>ISSN: 1520-5045<strong><br /> </strong></p>
dc.rights<p>Used by permission: the author(s)</p> <p>The document available for download is the accepted manuscript version of this article. The final published version may be accessed from the publisher <a href="http://dx.doi.org/10.1021/ie502256m">here</a>.</p>
dc.subjectCO2 capture
dc.subjectamino acid salts
dc.subjectprotonation constants (pKa)
dc.subjectstandard molar enthalpy of protonation
dc.subjectstandard molar entropy of protonation
dc.subjecthigh temperature absorption
dc.subjectsarcosine
dc.titleProtonation Constants and Thermodynamic Properties of Amino Acid Salts for CO2 Capture at High Temperatures
dc.typeJournal Article
Files
Original bundle
No Thumbnail Available
Name:
Protonation_constants_IECR_2014.pdf
Size:
603.43 KB
Format:
Adobe Portable Document Format
Download
Collections
Science & Mathematics