Influence of NaCl on mineral carbonation of CO 2 using cement material in aqueous solutions

Hwanju Jo; Young Nam Jang; Ho Young Jo

doi:10.1016/j.ces.2012.06.034

Influence of NaCl on mineral carbonation of CO ₂ using cement material in aqueous solutions

Hwanju Jo
, Young Nam Jang
, Ho Young Jo^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The carbonation of cement materials in NaCl solution was evaluated at various NaCl concentrations (0-2.0M). Leaching and carbonation tests were conducted on slurry-mixed ordinary Portland cement (OPC) with NaCl solutions at a solid to liquid ratio of 50g/l in a Teflon reactor under ambient temperature and pressure conditions. After 24-h leaching, the pH of the slurry decreased with increasing NaCl concentration, whereas the Ca concentration slightly increased. The C-S-H content in the reacted samples after 24-h leaching increased in the presence of NaCl. After the carbonation tests, the CaCO ₃ content in the reacted samples increased by 7.5-18.4wt%, whereas the C-S-H content decreased by 7.1-33.0wt% in the NaCl solutions. The particle size of the precipitated CaCO ₃ appeared to be decreased as the NaCl concentration was increased to 1M, but increased as the NaCl concentration was further increased to 2M.

Original language	English
Pages (from-to)	232-241
Number of pages	10
Journal	Chemical Engineering Science
Volume	80
DOIs	https://doi.org/10.1016/j.ces.2012.06.034
Publication status	Published - 2012 Oct 1

Bibliographical note

Funding Information:
This work was supported by the Korea Institute of Geoscience and Mineral Resources (KIGAM) (Utilization and sequestration of CO 2 by using industrial minerals). We greatly appreciate the anonymous reviewers for the valuable comments to improve the quality of this manuscript.

Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.

Keywords

Carbon dioxide
Carbonation
Cementitious materials
Leaching
Sequestration
Sodium chloride

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.ces.2012.06.034

Cite this

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title = "Influence of NaCl on mineral carbonation of CO 2 using cement material in aqueous solutions",

abstract = "The carbonation of cement materials in NaCl solution was evaluated at various NaCl concentrations (0-2.0M). Leaching and carbonation tests were conducted on slurry-mixed ordinary Portland cement (OPC) with NaCl solutions at a solid to liquid ratio of 50g/l in a Teflon reactor under ambient temperature and pressure conditions. After 24-h leaching, the pH of the slurry decreased with increasing NaCl concentration, whereas the Ca concentration slightly increased. The C-S-H content in the reacted samples after 24-h leaching increased in the presence of NaCl. After the carbonation tests, the CaCO 3 content in the reacted samples increased by 7.5-18.4wt\%, whereas the C-S-H content decreased by 7.1-33.0wt\% in the NaCl solutions. The particle size of the precipitated CaCO 3 appeared to be decreased as the NaCl concentration was increased to 1M, but increased as the NaCl concentration was further increased to 2M.",

keywords = "Carbon dioxide, Carbonation, Cementitious materials, Leaching, Sequestration, Sodium chloride",

author = "Hwanju Jo and Jang, \{Young Nam\} and \{Young Jo\}, Ho",

note = "Funding Information: This work was supported by the Korea Institute of Geoscience and Mineral Resources (KIGAM) (Utilization and sequestration of CO 2 by using industrial minerals). We greatly appreciate the anonymous reviewers for the valuable comments to improve the quality of this manuscript. Copyright: Copyright 2012 Elsevier B.V., All rights reserved.",

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AU - Jang, Young Nam

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N1 - Funding Information: This work was supported by the Korea Institute of Geoscience and Mineral Resources (KIGAM) (Utilization and sequestration of CO 2 by using industrial minerals). We greatly appreciate the anonymous reviewers for the valuable comments to improve the quality of this manuscript. Copyright: Copyright 2012 Elsevier B.V., All rights reserved.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - The carbonation of cement materials in NaCl solution was evaluated at various NaCl concentrations (0-2.0M). Leaching and carbonation tests were conducted on slurry-mixed ordinary Portland cement (OPC) with NaCl solutions at a solid to liquid ratio of 50g/l in a Teflon reactor under ambient temperature and pressure conditions. After 24-h leaching, the pH of the slurry decreased with increasing NaCl concentration, whereas the Ca concentration slightly increased. The C-S-H content in the reacted samples after 24-h leaching increased in the presence of NaCl. After the carbonation tests, the CaCO 3 content in the reacted samples increased by 7.5-18.4wt%, whereas the C-S-H content decreased by 7.1-33.0wt% in the NaCl solutions. The particle size of the precipitated CaCO 3 appeared to be decreased as the NaCl concentration was increased to 1M, but increased as the NaCl concentration was further increased to 2M.

AB - The carbonation of cement materials in NaCl solution was evaluated at various NaCl concentrations (0-2.0M). Leaching and carbonation tests were conducted on slurry-mixed ordinary Portland cement (OPC) with NaCl solutions at a solid to liquid ratio of 50g/l in a Teflon reactor under ambient temperature and pressure conditions. After 24-h leaching, the pH of the slurry decreased with increasing NaCl concentration, whereas the Ca concentration slightly increased. The C-S-H content in the reacted samples after 24-h leaching increased in the presence of NaCl. After the carbonation tests, the CaCO 3 content in the reacted samples increased by 7.5-18.4wt%, whereas the C-S-H content decreased by 7.1-33.0wt% in the NaCl solutions. The particle size of the precipitated CaCO 3 appeared to be decreased as the NaCl concentration was increased to 1M, but increased as the NaCl concentration was further increased to 2M.

KW - Carbon dioxide

KW - Carbonation

KW - Cementitious materials

KW - Leaching

KW - Sequestration

KW - Sodium chloride

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