Volume 41, Issue 10 pp. 2077-2086
Research Article

Acidification Optimization and Granulation of a Steel-Slag-Derived Sorbent for CO2 Capture

Jian Sun

Jian Sun

Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, 1037 Luoyu Road, 430074 Wuhan, China

Nanjing Normal University, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Energy and Mechanical Engineering, 78 Bancang Street, 210042 Nanjing, China

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Wenqiang Liu

Corresponding Author

Wenqiang Liu

Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, 1037 Luoyu Road, 430074 Wuhan, China

Correspondence: Wenqiang Liu ([email protected]), Minghou Xu ([email protected]), State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China.Search for more papers by this author
Yingchao Hu

Yingchao Hu

Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, 1037 Luoyu Road, 430074 Wuhan, China

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Yuandong Yang

Yuandong Yang

Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, 1037 Luoyu Road, 430074 Wuhan, China

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Yongqing Xu

Yongqing Xu

Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, 1037 Luoyu Road, 430074 Wuhan, China

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Minghou Xu

Corresponding Author

Minghou Xu

Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, 1037 Luoyu Road, 430074 Wuhan, China

Correspondence: Wenqiang Liu ([email protected]), Minghou Xu ([email protected]), State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China.Search for more papers by this author
First published: 29 June 2018
Citations: 17

Abstract

Steel slag was used as a low-cost feedstock to prepare CaO-based sorbents for CO2 capture by acidification treatment, and the acidification process was optimized. Four main acidification parameters (i.e., extraction time, extraction temperature, acetic acid concentration, and solid/liquid ratio) were investigated. The solid/liquid ratio and extraction time are the most important factors that affect the CO2 capture capacity and stability of the sorbents. The CO2 sorption performance of optimal steel-slag-derived sorbent is more stable than that of naturally occurring limestone, due to the low Si/Ca ratio and the presence of MgO with high anti-sintering ability. CaO-based pellets with high resistance to attrition and compression were produced by extrusion of the steel-slag-derived sorbent powders.

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