Version 1
: Received: 26 August 2024 / Approved: 27 August 2024 / Online: 28 August 2024 (10:39:35 CEST)
How to cite:
Cau, C.; Taras, A.; Caggiu, L.; Masia, G.; Enzo, S.; Garroni, S.; Murgia, F.; Mulas, G. Structural Evolution of Olivine during Mechanochemically-Assisted Mineral Carbonation under CO2 Flow. Preprints2024, 2024082027. https://doi.org/10.20944/preprints202408.2027.v1
Cau, C.; Taras, A.; Caggiu, L.; Masia, G.; Enzo, S.; Garroni, S.; Murgia, F.; Mulas, G. Structural Evolution of Olivine during Mechanochemically-Assisted Mineral Carbonation under CO2 Flow. Preprints 2024, 2024082027. https://doi.org/10.20944/preprints202408.2027.v1
Cau, C.; Taras, A.; Caggiu, L.; Masia, G.; Enzo, S.; Garroni, S.; Murgia, F.; Mulas, G. Structural Evolution of Olivine during Mechanochemically-Assisted Mineral Carbonation under CO2 Flow. Preprints2024, 2024082027. https://doi.org/10.20944/preprints202408.2027.v1
APA Style
Cau, C., Taras, A., Caggiu, L., Masia, G., Enzo, S., Garroni, S., Murgia, F., & Mulas, G. (2024). Structural Evolution of Olivine during Mechanochemically-Assisted Mineral Carbonation under CO2 Flow. Preprints. https://doi.org/10.20944/preprints202408.2027.v1
Chicago/Turabian Style
Cau, C., Fabrizio Murgia and Gabriele Mulas. 2024 "Structural Evolution of Olivine during Mechanochemically-Assisted Mineral Carbonation under CO2 Flow" Preprints. https://doi.org/10.20944/preprints202408.2027.v1
Abstract
The mechanism of the mechanically assisted mineral carbonation of commercial olivine under flow of CO2/N2 mixture has been elucidated by ex situ powder X-ray diffraction and Fourier-transform infrared spectroscopy. The overall CO2 conversion depends to the rotation frequency of the mill’s engine, and reached 85% within 90 minutes of mechanical treatment, at a flow rate of 2.5 l min-1. By tuning the frequency rotation, the kinetics of CO2 conversion changed from a sigmoid behaviour into a more complex reaction pathway, involving subsequent steps. The structural analyses suggest the clinochlore, a Mg- and Fe- containing aluminosilicate gathered among the components of olivine, is formed and consumed in different stages, thus promoting the CO2 sequestration that eventually results into the formation of hydrated and anhydrous Mg-based carbonates.
Keywords
CCUS; olivine; ball-milling; ex situ XRD; carbon mineralization
Subject
Chemistry and Materials Science, Physical Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
