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Experimental investigation of multiple industrial wastes for carbon dioxide removal strategies
https://orcid.org/0000-0001-9524-7206
https://orcid.org/0000-0002-4383-799X
Highlights Industrial by-products show variable promise for geochemical carbon dioxide removal. Reactions with CO2 vary with different physical, chemical and mineral properties. Different samples have been tested here for their reactivities with CO2 and water. Ca- and Mg-bearing samples were key cation sources at favourable dissolution rates. Reaction accelerants such as heat and enriched CO2 gas can increase CDR potential.
Abstract Industrial solid waste by-products are being increasingly employed for geochemical carbon dioxide removal (CDR) strategies due to their fine grain size, accessibility, and large annual production tonnages. Here, a range of such by-products has been tested experimentally for their reactivities with CO2 and water. Sample solutions were monitored for 100 h for changes in chemistry, and solid samples were characterised pre- and post-experiment. Samples rich in Ca- and Mg-bearing minerals, such as dunite, kimberlite, and ilmenite mine tailings, as well as marble quarry cuttings, were key cation sources. Ni sulphide, fluorite and borax tailings, coal-fired power plant fly ashes, and red mud samples showed high dissolution rates. The highest reaction rates were often observed during the initial few hours, and compared well to rates determined for rocks typically targeted for CDR purposes, such as basalt and gabbro. Several samples also showed secondary carbonate precipitation, suggesting opportunities for the development of single-step CDR technologies. Overall, the results of this study indicate that several industrial by-products can provide sufficient cations at favourable dissolution rates for geochemical CDR purposes. Any on-site or near-site conditions for reaction acceleration such as heat, concentrated CO2 or microbes, could further increase favourability for geochemical CDR opportunities.
Graphical abstract Display Omitted
Experimental investigation of multiple industrial wastes for carbon dioxide removal strategies
https://orcid.org/0000-0001-9524-7206
https://orcid.org/0000-0002-4383-799X
Highlights Industrial by-products show variable promise for geochemical carbon dioxide removal. Reactions with CO2 vary with different physical, chemical and mineral properties. Different samples have been tested here for their reactivities with CO2 and water. Ca- and Mg-bearing samples were key cation sources at favourable dissolution rates. Reaction accelerants such as heat and enriched CO2 gas can increase CDR potential.
Abstract Industrial solid waste by-products are being increasingly employed for geochemical carbon dioxide removal (CDR) strategies due to their fine grain size, accessibility, and large annual production tonnages. Here, a range of such by-products has been tested experimentally for their reactivities with CO2 and water. Sample solutions were monitored for 100 h for changes in chemistry, and solid samples were characterised pre- and post-experiment. Samples rich in Ca- and Mg-bearing minerals, such as dunite, kimberlite, and ilmenite mine tailings, as well as marble quarry cuttings, were key cation sources. Ni sulphide, fluorite and borax tailings, coal-fired power plant fly ashes, and red mud samples showed high dissolution rates. The highest reaction rates were often observed during the initial few hours, and compared well to rates determined for rocks typically targeted for CDR purposes, such as basalt and gabbro. Several samples also showed secondary carbonate precipitation, suggesting opportunities for the development of single-step CDR technologies. Overall, the results of this study indicate that several industrial by-products can provide sufficient cations at favourable dissolution rates for geochemical CDR purposes. Any on-site or near-site conditions for reaction acceleration such as heat, concentrated CO2 or microbes, could further increase favourability for geochemical CDR opportunities.
Graphical abstract Display Omitted
Experimental investigation of multiple industrial wastes for carbon dioxide removal strategies
https://orcid.org/0000-0001-9524-7206
https://orcid.org/0000-0002-4383-799X
Highlights Industrial by-products show variable promise for geochemical carbon dioxide removal. Reactions with CO2 vary with different physical, chemical and mineral properties. Different samples have been tested here for their reactivities with CO2 and water. Ca- and Mg-bearing samples were key cation sources at favourable dissolution rates. Reaction accelerants such as heat and enriched CO2 gas can increase CDR potential.
Abstract Industrial solid waste by-products are being increasingly employed for geochemical carbon dioxide removal (CDR) strategies due to their fine grain size, accessibility, and large annual production tonnages. Here, a range of such by-products has been tested experimentally for their reactivities with CO2 and water. Sample solutions were monitored for 100 h for changes in chemistry, and solid samples were characterised pre- and post-experiment. Samples rich in Ca- and Mg-bearing minerals, such as dunite, kimberlite, and ilmenite mine tailings, as well as marble quarry cuttings, were key cation sources. Ni sulphide, fluorite and borax tailings, coal-fired power plant fly ashes, and red mud samples showed high dissolution rates. The highest reaction rates were often observed during the initial few hours, and compared well to rates determined for rocks typically targeted for CDR purposes, such as basalt and gabbro. Several samples also showed secondary carbonate precipitation, suggesting opportunities for the development of single-step CDR technologies. Overall, the results of this study indicate that several industrial by-products can provide sufficient cations at favourable dissolution rates for geochemical CDR purposes. Any on-site or near-site conditions for reaction acceleration such as heat, concentrated CO2 or microbes, could further increase favourability for geochemical CDR opportunities.
Graphical abstract Display Omitted
Experimental investigation of multiple industrial wastes for carbon dioxide removal strategies
Bullock, Liam A. (author) / Fernandez-Turiel, Jose-Luis (author) / Benavente, David (author)
2023-09-29
Article (Journal)
Electronic Resource
English
Experimental investigation of multiple industrial wastes for carbon dioxide removal strategies
| Elsevier | 2023
TIBKAT | Nachgewiesen 1970; 21.1975 - 29.1983
| Wiley | 1928