Influence of additives, temperature, and pressure on the morphology of nesquehonite- results from three synthesis routes
Back, Jens; Ismailov, Arnold; Sreenivasan, Harisankar; Smått, Jan-Henrik; Santos, Hellen Silva; Nguyen, Hoang; Levänen, Erkki; Zevenhoven, Ron; Kinnunen, Paivo (2025-01-07)
Springer
07.01.2025
Back, J., Ismailov, A., Sreenivasan, H. et al. Influence of additives, temperature, and pressure on the morphology of nesquehonite– results from three synthesis routes. emergent mater. (2025). https://doi.org/10.1007/s42247-024-00968-8.
https://creativecommons.org/licenses/by/4.0/
© The Author(s) 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
https://creativecommons.org/licenses/by/4.0/
© The Author(s) 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
https://creativecommons.org/licenses/by/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202504152630
https://urn.fi/URN:NBN:fi:oulu-202504152630
Tiivistelmä
Abstract
Carbon mineralization is expected to play a key role in the mitigation of climate change, as viable and efficient carbon capture and utilization (CCU) pathway. Indeed, the process has the advantage of enabling the recycling of waste-streams such as mine tailings or desalination brine, as well as the prospect of large-scale uptake of carbon dioxide emissions. However, the applications of the produced carbonates still hinder the commercial feasibility of the existing CCU routes, especially when hydrated Mg carbonates (HMCs) are obtained. HMCs are thermodynamically unstable, which poses potential risks in long-term stability. Nesquehonite (NQ, MgCO3·3H2O) is the major product of Mg carbonation in most aqueous reaction settings at moderate temperatures (15–50 °C), which has demonstrated suitable properties for producing construction materials. At somewhat higher temperatures (50–100 °C) hydromagnesite is obtained (4MgCO3·Mg(OH)2·4H2O). Yet, the final applications are not feasible as NQ often converts to hydromagnesite or other HMCs over time causing liberation of CO2 and volume instability. A key scientific gap remains on the relationship between the morphology of NQ with the operational settings of the carbonation reaction. In turn, such understanding is needed to enable tuning NQ applications in construction materials. Therefore, the current work reports the observed features of NQ via three different synthetic routes, showing the effect of two additives (Mg acetate, and sodium dodecyl sulphate), and overpressure CO2 on the physico-chemical features of NQ formed from magnesium chloride or sulphate solutions and from brucite-water system and sCO2 conditions.
Carbon mineralization is expected to play a key role in the mitigation of climate change, as viable and efficient carbon capture and utilization (CCU) pathway. Indeed, the process has the advantage of enabling the recycling of waste-streams such as mine tailings or desalination brine, as well as the prospect of large-scale uptake of carbon dioxide emissions. However, the applications of the produced carbonates still hinder the commercial feasibility of the existing CCU routes, especially when hydrated Mg carbonates (HMCs) are obtained. HMCs are thermodynamically unstable, which poses potential risks in long-term stability. Nesquehonite (NQ, MgCO3·3H2O) is the major product of Mg carbonation in most aqueous reaction settings at moderate temperatures (15–50 °C), which has demonstrated suitable properties for producing construction materials. At somewhat higher temperatures (50–100 °C) hydromagnesite is obtained (4MgCO3·Mg(OH)2·4H2O). Yet, the final applications are not feasible as NQ often converts to hydromagnesite or other HMCs over time causing liberation of CO2 and volume instability. A key scientific gap remains on the relationship between the morphology of NQ with the operational settings of the carbonation reaction. In turn, such understanding is needed to enable tuning NQ applications in construction materials. Therefore, the current work reports the observed features of NQ via three different synthetic routes, showing the effect of two additives (Mg acetate, and sodium dodecyl sulphate), and overpressure CO2 on the physico-chemical features of NQ formed from magnesium chloride or sulphate solutions and from brucite-water system and sCO2 conditions.
Kokoelmat
- Avoin saatavuus [38824]
Ellei muuten mainita, aineiston lisenssi on https://creativecommons.org/licenses/by/4.0/