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Thermal Stability of Calcium Oxalates from CO2 Sequestration for Storage Purposes: An In-Situ HT-XRPD and TGA Combined Study

Articolo
Data di Pubblicazione:
2022
Abstract:
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 CO2 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 in-situ 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 CO2 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 CO2 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 CO2 starting from 550 °C.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
weddellite; dehydration; decarbonation; thermal decomposition; HT-XRPD; TGA-FTIR
Elenco autori:
Nadia Curetti, Linda Pastero, Davide Bernasconi, Andrea Cotellucci, Ingrid Corazzari, Maurizio Archetti, Alessandro Pavese
Autori di Ateneo:
BERNASCONI DAVIDE
PASTERO Linda
PAVESE Alessandro
Link alla scheda completa:
https://iris.unito.it/handle/2318/1835319
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1835319/922085/minerals-12-00053-v2.pdf
Pubblicato in:
MINERALS
Journal
Progetto:
PAVESE Alessandro - MIUR - PRIN 2017 Linea a - MINERAL REACTIVITY, A KEY TO UNDERSTAND LARGE-SCALE PROCESSES: FROM ROCK FORMING ENVIRONMENTS TO SOLID WASTE RECOVERING/LITHIFICATION
  • Dati Generali
  • Aree Di Ricerca

Dati Generali

URL

https://www.mdpi.com/2571-8797/6/4/66

Aree Di Ricerca

Settori (8)


PE10_10 - Mineralogy, petrology, igneous petrology, metamorphic petrology - (2024)

PE10_11 - Geochemistry, cosmochemistry, crystal chemistry, isotope geochemistry, thermodynamics - (2024)

PE8_11 - Environmental engineering, e.g. sustainable design, waste and water treatment, recycling, regeneration or recovery of compounds, carbon capture & storage - (2024)

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Cambiamenti Climatici

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Geodiversità e Patrimonio Geologico

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Protezione e prevenzione del territorio dai rischi naturali, ambientali e antropici

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Struttura e Composizione della Terra

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Materiali Avanzati
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