Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study
Calcium oxalates are naturally occurring biominerals and can be found as a byproduct of some industrial processes. Recently, a new and green method for carbon capture and sequestration in stable calcium oxalate from oxalic acid produced by carbon dioxide reduction was proposed. The reaction resulted...
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MDPI AG
2021-12-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/1/53 |
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| author | Nadia Curetti Linda Pastero Davide Bernasconi Andrea Cotellucci Ingrid Corazzari Maurizio Archetti Alessandro Pavese |
| author_facet | Nadia Curetti Linda Pastero Davide Bernasconi Andrea Cotellucci Ingrid Corazzari Maurizio Archetti Alessandro Pavese |
| author_sort | Nadia Curetti |
| collection | DOAJ |
| description | Calcium oxalates are naturally occurring biominerals and can be found as a byproduct of some industrial processes. Recently, a new and green method for carbon capture and sequestration in stable calcium oxalate from oxalic acid produced by carbon dioxide reduction was proposed. The reaction resulted in high-quality weddellite crystals. Assessing the stability of these weddellite crystals is crucial to forecast their reuse as solid-state reservoir of pure CO<sub>2</sub> and CaO in a circular economy perspective or, eventually, their disposal. The thermal decomposition of weddellite obtained from the new method of carbon capture and storage was studied by coupling <i>in-situ</i> high-temperature X-ray powder diffraction and thermogravimetric analysis, in order to evaluate the dehydration, decarbonation, and the possible production of unwanted volatile species during heating. At low temperature (119–255 °C), structural water release was superimposed to an early CO<sub>2</sub> feeble evolution, resulting in a water-carbon dioxide mixture that should be separated for reuse. Furthermore, the storage temperature limit must be considered bearing in mind this CO<sub>2</sub> release low-temperature event. In the range 390–550 °C, a two-component mixture of carbon monoxide and dioxide is evolved, requiring oxidation of the former or gas separation to reuse pure gases. Finally, the last decarbonation reaction produced pure CO<sub>2</sub> starting from 550 °C. |
| first_indexed | 2024-03-10T00:51:45Z |
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| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T00:51:45Z |
| publishDate | 2021-12-01 |
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| record_format | Article |
| series | Minerals |
| spelling | doaj.art-4bf579d854b04ab88ea7925bf2ba3e8f2023-11-23T14:49:34ZengMDPI AGMinerals2075-163X2021-12-011215310.3390/min12010053Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined StudyNadia Curetti0Linda Pastero1Davide Bernasconi2Andrea Cotellucci3Ingrid Corazzari4Maurizio Archetti5Alessandro Pavese6Earth Sciences Department, Università Degli Studi di Torino, 10125 Torino, ItalyEarth Sciences Department, Università Degli Studi di Torino, 10125 Torino, ItalyEarth Sciences Department, Università Degli Studi di Torino, 10125 Torino, ItalyEarth Sciences Department, Università Degli Studi di Torino, 10125 Torino, ItalyChemistry Department, Università Degli Studi di Torino, 10125 Torino, ItalyEcoSpray Technologies S.r.l., 15050 Alzano Scrivia, ItalyEarth Sciences Department, Università Degli Studi di Torino, 10125 Torino, ItalyCalcium oxalates are naturally occurring biominerals and can be found as a byproduct of some industrial processes. Recently, a new and green method for carbon capture and sequestration in stable calcium oxalate from oxalic acid produced by carbon dioxide reduction was proposed. The reaction resulted in high-quality weddellite crystals. Assessing the stability of these weddellite crystals is crucial to forecast their reuse as solid-state reservoir of pure CO<sub>2</sub> and CaO in a circular economy perspective or, eventually, their disposal. The thermal decomposition of weddellite obtained from the new method of carbon capture and storage was studied by coupling <i>in-situ</i> high-temperature X-ray powder diffraction and thermogravimetric analysis, in order to evaluate the dehydration, decarbonation, and the possible production of unwanted volatile species during heating. At low temperature (119–255 °C), structural water release was superimposed to an early CO<sub>2</sub> feeble evolution, resulting in a water-carbon dioxide mixture that should be separated for reuse. Furthermore, the storage temperature limit must be considered bearing in mind this CO<sub>2</sub> release low-temperature event. In the range 390–550 °C, a two-component mixture of carbon monoxide and dioxide is evolved, requiring oxidation of the former or gas separation to reuse pure gases. Finally, the last decarbonation reaction produced pure CO<sub>2</sub> starting from 550 °C.https://www.mdpi.com/2075-163X/12/1/53weddellitedehydrationdecarbonationthermal decompositionHT-XRPDTGA-FTIR |
| spellingShingle | Nadia Curetti Linda Pastero Davide Bernasconi Andrea Cotellucci Ingrid Corazzari Maurizio Archetti Alessandro Pavese Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study Minerals weddellite dehydration decarbonation thermal decomposition HT-XRPD TGA-FTIR |
| title | Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study |
| title_full | Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study |
| title_fullStr | Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study |
| title_full_unstemmed | Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study |
| title_short | Thermal Stability of Calcium Oxalates from CO<sub>2</sub> Sequestration for Storage Purposes: An <i>In-Situ</i> HT-XRPD and TGA Combined Study |
| title_sort | thermal stability of calcium oxalates from co sub 2 sub sequestration for storage purposes an i in situ i ht xrpd and tga combined study |
| topic | weddellite dehydration decarbonation thermal decomposition HT-XRPD TGA-FTIR |
| url | https://www.mdpi.com/2075-163X/12/1/53 |
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