CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure

[Image: see text] Mineral carbonation using alkaline wastes is an attractive approach to CO(2) utilization. Owing to the difference between waste CO(2) and feedstock CO(2), developing CO(2) utilization technologies without CO(2) purification and pressurization is a promising concept. This study inve...

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Autores principales: Ho, Hsing-Jung, Iizuka, Atsushi, Shibata, Etsuro, Tomita, Hisashi, Takano, Kenji, Endo, Takumi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345389/
https://www.ncbi.nlm.nih.gov/pubmed/32656408
http://dx.doi.org/10.1021/acsomega.0c00985
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author Ho, Hsing-Jung
Iizuka, Atsushi
Shibata, Etsuro
Tomita, Hisashi
Takano, Kenji
Endo, Takumi
author_facet Ho, Hsing-Jung
Iizuka, Atsushi
Shibata, Etsuro
Tomita, Hisashi
Takano, Kenji
Endo, Takumi
author_sort Ho, Hsing-Jung
collection PubMed
description [Image: see text] Mineral carbonation using alkaline wastes is an attractive approach to CO(2) utilization. Owing to the difference between waste CO(2) and feedstock CO(2), developing CO(2) utilization technologies without CO(2) purification and pressurization is a promising concept. This study investigated a potential method for CO(2) utilization via direct aqueous carbonation of synthesized concrete fines under atmospheric pressure and low CO(2) concentration. The carbonation reaction with different solid–liquid ratios and different concentrations of introduced CO(2) was examined in detail. Under basic conditions, a CO(2) uptake of 0.19 g-CO(2)/g-concrete fines demonstrated that direct aqueous carbonation of concrete fines under atmospheric pressure and low CO(2) concentration is effective. The CaCO(3) concentration, degree of carbonation, and reaction mechanism were clarified. Furthermore, characterization of the carbonated products was used to evaluate ways of utilizing the carbonated products.
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spelling pubmed-73453892020-07-10 CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure Ho, Hsing-Jung Iizuka, Atsushi Shibata, Etsuro Tomita, Hisashi Takano, Kenji Endo, Takumi ACS Omega [Image: see text] Mineral carbonation using alkaline wastes is an attractive approach to CO(2) utilization. Owing to the difference between waste CO(2) and feedstock CO(2), developing CO(2) utilization technologies without CO(2) purification and pressurization is a promising concept. This study investigated a potential method for CO(2) utilization via direct aqueous carbonation of synthesized concrete fines under atmospheric pressure and low CO(2) concentration. The carbonation reaction with different solid–liquid ratios and different concentrations of introduced CO(2) was examined in detail. Under basic conditions, a CO(2) uptake of 0.19 g-CO(2)/g-concrete fines demonstrated that direct aqueous carbonation of concrete fines under atmospheric pressure and low CO(2) concentration is effective. The CaCO(3) concentration, degree of carbonation, and reaction mechanism were clarified. Furthermore, characterization of the carbonated products was used to evaluate ways of utilizing the carbonated products. American Chemical Society 2020-06-22 /pmc/articles/PMC7345389/ /pubmed/32656408 http://dx.doi.org/10.1021/acsomega.0c00985 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Ho, Hsing-Jung
Iizuka, Atsushi
Shibata, Etsuro
Tomita, Hisashi
Takano, Kenji
Endo, Takumi
CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure
title CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure
title_full CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure
title_fullStr CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure
title_full_unstemmed CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure
title_short CO(2) Utilization via Direct Aqueous Carbonation of Synthesized Concrete Fines under Atmospheric Pressure
title_sort co(2) utilization via direct aqueous carbonation of synthesized concrete fines under atmospheric pressure
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345389/
https://www.ncbi.nlm.nih.gov/pubmed/32656408
http://dx.doi.org/10.1021/acsomega.0c00985
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