Rapid CO2 mineralization by zeolite via cation exchange
Abstract This study illuminates the mineral carbonation potential of zeolite minerals. Zeolite minerals are common alteration products of basaltic rocks and are known for their ability to rapidly exchange their interstitial cations with those in aqueous solutions. A series of closed system batch rea...
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Nature Portfolio
2025-01-01
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| Online Access: | https://doi.org/10.1038/s41598-024-82520-6 |
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| author | Abdulwahab Alqahtani Mouadh Addassi Hussein Hoteit Eric Oelkers |
| author_facet | Abdulwahab Alqahtani Mouadh Addassi Hussein Hoteit Eric Oelkers |
| author_sort | Abdulwahab Alqahtani |
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| description | Abstract This study illuminates the mineral carbonation potential of zeolite minerals. Zeolite minerals are common alteration products of basaltic rocks and are known for their ability to rapidly exchange their interstitial cations with those in aqueous solutions. A series of closed system batch reactor experiments was conducted at 60 °C by combining stilbite, a Ca-bearing zeolite, with 0.1 mol/kgw aqueous sodium carbonate solutions. The individual batch reactor experiments ran from 2 to 225 days. Scanning electron microscope images of the solids recovered from the experiments reveal the presence of extensive calcite crystals, suggesting rapid and efficient carbonation. The total mass of CO2 mineralized during the experiments, determined from the direct analysis of the solids by thermogravimetric analysis and organic carbon analysis, equaled more than 5% of that of the original stilbite within a month. This is approximately equal to maximum CO2 mineralization possible if all of the Ca in the original stilbite was incorporated into calcite. Chemical analysis of reacted stilbite shows that approximately 2 Na atoms were incorporated into stilbite for each Ca atom incorporated into the precipitated calcite. These observations indicate that the carbon removal by stilbite proceeded by the rapid exchange of Na for Ca in its structure. This process results in carbonation rates that are far faster than those achieved by a silicate dissolution-carbonate precipitation mechanism. These results, consequently, compel consideration of targeting subsurface mineral carbonation efforts into zeolite-rich rocks. |
| format | Article |
| id | doaj-art-b6f34ed0ca034a2ea4d385a4255cbb16 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-b6f34ed0ca034a2ea4d385a4255cbb162025-01-12T12:19:44ZengNature PortfolioScientific Reports2045-23222025-01-0115111510.1038/s41598-024-82520-6Rapid CO2 mineralization by zeolite via cation exchangeAbdulwahab Alqahtani0Mouadh Addassi1Hussein Hoteit2Eric Oelkers3Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST)Abstract This study illuminates the mineral carbonation potential of zeolite minerals. Zeolite minerals are common alteration products of basaltic rocks and are known for their ability to rapidly exchange their interstitial cations with those in aqueous solutions. A series of closed system batch reactor experiments was conducted at 60 °C by combining stilbite, a Ca-bearing zeolite, with 0.1 mol/kgw aqueous sodium carbonate solutions. The individual batch reactor experiments ran from 2 to 225 days. Scanning electron microscope images of the solids recovered from the experiments reveal the presence of extensive calcite crystals, suggesting rapid and efficient carbonation. The total mass of CO2 mineralized during the experiments, determined from the direct analysis of the solids by thermogravimetric analysis and organic carbon analysis, equaled more than 5% of that of the original stilbite within a month. This is approximately equal to maximum CO2 mineralization possible if all of the Ca in the original stilbite was incorporated into calcite. Chemical analysis of reacted stilbite shows that approximately 2 Na atoms were incorporated into stilbite for each Ca atom incorporated into the precipitated calcite. These observations indicate that the carbon removal by stilbite proceeded by the rapid exchange of Na for Ca in its structure. This process results in carbonation rates that are far faster than those achieved by a silicate dissolution-carbonate precipitation mechanism. These results, consequently, compel consideration of targeting subsurface mineral carbonation efforts into zeolite-rich rocks.https://doi.org/10.1038/s41598-024-82520-6CO2 mineralizationCCUSMineral carbonationCO2 storageZeolitesCarbon capture and storage |
| spellingShingle | Abdulwahab Alqahtani Mouadh Addassi Hussein Hoteit Eric Oelkers Rapid CO2 mineralization by zeolite via cation exchange Scientific Reports CO2 mineralization CCUS Mineral carbonation CO2 storage Zeolites Carbon capture and storage |
| title | Rapid CO2 mineralization by zeolite via cation exchange |
| title_full | Rapid CO2 mineralization by zeolite via cation exchange |
| title_fullStr | Rapid CO2 mineralization by zeolite via cation exchange |
| title_full_unstemmed | Rapid CO2 mineralization by zeolite via cation exchange |
| title_short | Rapid CO2 mineralization by zeolite via cation exchange |
| title_sort | rapid co2 mineralization by zeolite via cation exchange |
| topic | CO2 mineralization CCUS Mineral carbonation CO2 storage Zeolites Carbon capture and storage |
| url | https://doi.org/10.1038/s41598-024-82520-6 |
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