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Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area

The carbonation of alkaline industrial wastes is a pressing issue that is aimed at reducing CO(2) emissions while promoting a circular economy. In this study, we explored the direct aqueous carbonation of steel slag and cement kiln dust in a newly developed pressurized reactor that operated at 15 ba...

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Autores principales: Biava, Giada, Zacco, Annalisa, Zanoletti, Alessandra, Sorrentino, Giampiero Pasquale, Capone, Claudia, Princigallo, Antonio, Depero, Laura Eleonora, Bontempi, Elza
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254272/
https://www.ncbi.nlm.nih.gov/pubmed/37297187
http://dx.doi.org/10.3390/ma16114055
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author Biava, Giada
Zacco, Annalisa
Zanoletti, Alessandra
Sorrentino, Giampiero Pasquale
Capone, Claudia
Princigallo, Antonio
Depero, Laura Eleonora
Bontempi, Elza
author_facet Biava, Giada
Zacco, Annalisa
Zanoletti, Alessandra
Sorrentino, Giampiero Pasquale
Capone, Claudia
Princigallo, Antonio
Depero, Laura Eleonora
Bontempi, Elza
author_sort Biava, Giada
collection PubMed
description The carbonation of alkaline industrial wastes is a pressing issue that is aimed at reducing CO(2) emissions while promoting a circular economy. In this study, we explored the direct aqueous carbonation of steel slag and cement kiln dust in a newly developed pressurized reactor that operated at 15 bar. The goal was to identify the optimal reaction conditions and the most promising by-products that can be reused in their carbonated form, particularly in the construction industry. We proposed a novel, synergistic strategy for managing industrial waste and reducing the use of virgin raw materials among industries located in Lombardy, Italy, specifically Bergamo–Brescia. Our initial findings are highly promising, with argon oxygen decarburization (AOD) slag and black slag (sample 3) producing the best results (70 g CO(2)/kg slag and 76 g CO(2)/kg slag, respectively) compared with the other samples. Cement kiln dust (CKD) yielded 48 g CO(2)/kg CKD. We showed that the high concentration of CaO in the waste facilitated carbonation, while the presence of Fe compounds in large amounts caused the material to be less soluble in water, affecting the homogeneity of the slurry.
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spelling pubmed-102542722023-06-10 Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area Biava, Giada Zacco, Annalisa Zanoletti, Alessandra Sorrentino, Giampiero Pasquale Capone, Claudia Princigallo, Antonio Depero, Laura Eleonora Bontempi, Elza Materials (Basel) Article The carbonation of alkaline industrial wastes is a pressing issue that is aimed at reducing CO(2) emissions while promoting a circular economy. In this study, we explored the direct aqueous carbonation of steel slag and cement kiln dust in a newly developed pressurized reactor that operated at 15 bar. The goal was to identify the optimal reaction conditions and the most promising by-products that can be reused in their carbonated form, particularly in the construction industry. We proposed a novel, synergistic strategy for managing industrial waste and reducing the use of virgin raw materials among industries located in Lombardy, Italy, specifically Bergamo–Brescia. Our initial findings are highly promising, with argon oxygen decarburization (AOD) slag and black slag (sample 3) producing the best results (70 g CO(2)/kg slag and 76 g CO(2)/kg slag, respectively) compared with the other samples. Cement kiln dust (CKD) yielded 48 g CO(2)/kg CKD. We showed that the high concentration of CaO in the waste facilitated carbonation, while the presence of Fe compounds in large amounts caused the material to be less soluble in water, affecting the homogeneity of the slurry. MDPI 2023-05-29 /pmc/articles/PMC10254272/ /pubmed/37297187 http://dx.doi.org/10.3390/ma16114055 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Biava, Giada
Zacco, Annalisa
Zanoletti, Alessandra
Sorrentino, Giampiero Pasquale
Capone, Claudia
Princigallo, Antonio
Depero, Laura Eleonora
Bontempi, Elza
Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area
title Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area
title_full Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area
title_fullStr Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area
title_full_unstemmed Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area
title_short Accelerated Direct Carbonation of Steel Slag and Cement Kiln Dust: An Industrial Symbiosis Strategy Applied in the Bergamo–Brescia Area
title_sort accelerated direct carbonation of steel slag and cement kiln dust: an industrial symbiosis strategy applied in the bergamo–brescia area
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254272/
https://www.ncbi.nlm.nih.gov/pubmed/37297187
http://dx.doi.org/10.3390/ma16114055
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