Development of robust CaO-based sorbents from blast furnace slag for calcium looping CO2 capture

Sara Yasipourtehrani; Sicong Tian; Vladimir Strezov; Tao Kan; Tim Evans

doi:10.1016/j.cej.2020.124140

Development of robust CaO-based sorbents from blast furnace slag for calcium looping CO₂ capture

Sara Yasipourtehrani, Sicong Tian^*, Vladimir Strezov, Tao Kan, Tim Evans

^*Corresponding author for this work

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

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Abstract

CaO-based calcium looping materials have received great interest for their use in thermochemical CO₂ capture and energy storage, as well as CO₂-related energy conversion processes. In this paper, the development of robust CaO-based CO₂ sorbents using waste blast furnace slag (BFS) as a sustainable and environmentally benign feedstock is reported. Calcium and magnesium in the BFS can be facilely acquired through an acid extraction process, and appear in the form of CaO and MgO, which serve as a CO₂ carrier and structural stabiliser, respectively, in the prepared CO₂ sorbents. The BFS-derived sorbent prepared in this study exhibited a superior CO₂ capture capacity of 0.37 g _CO₂/g_sorbent with an average cyclic deactivation rate as low as 2.3%, representing a balanced performance between CO₂ uptake and cyclic stability as compared to most other waste-derived, CaO-based CO₂ sorbents. This study demonstrated that CaO-stabiliser interaction largely determines the CO₂ capture performance of CaO-based sorbents, and the Ca/Si ratio in the BFS-derived sorbent should be effectively controlled to allow the material to capture CO₂ at a high performance.

Original language	English
Article number	124140
Pages (from-to)	1-9
Number of pages	9
Journal	Chemical Engineering Journal
Volume	387
DOIs	https://doi.org/10.1016/j.cej.2020.124140
Publication status	Published - 1 May 2020

Bibliographical note

Copyright the Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

Calcium looping
CO₂ capture
CaO-based sorbent
Blast furnace slag
Industrial waste utilisation

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10.1016/j.cej.2020.124140Licence: CC BY-NC-ND

Publisher version (open access)Final published version, 1.6 MBLicence: CC BY-NC-ND

Cite this

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title = "Development of robust CaO-based sorbents from blast furnace slag for calcium looping CO2 capture",

abstract = "CaO-based calcium looping materials have received great interest for their use in thermochemical CO2 capture and energy storage, as well as CO2-related energy conversion processes. In this paper, the development of robust CaO-based CO2 sorbents using waste blast furnace slag (BFS) as a sustainable and environmentally benign feedstock is reported. Calcium and magnesium in the BFS can be facilely acquired through an acid extraction process, and appear in the form of CaO and MgO, which serve as a CO2 carrier and structural stabiliser, respectively, in the prepared CO2 sorbents. The BFS-derived sorbent prepared in this study exhibited a superior CO2 capture capacity of 0.37 g CO2 /gsorbent with an average cyclic deactivation rate as low as 2.3%, representing a balanced performance between CO2 uptake and cyclic stability as compared to most other waste-derived, CaO-based CO2 sorbents. This study demonstrated that CaO-stabiliser interaction largely determines the CO2 capture performance of CaO-based sorbents, and the Ca/Si ratio in the BFS-derived sorbent should be effectively controlled to allow the material to capture CO2 at a high performance. ",

keywords = "Calcium looping, CO₂ capture, CaO-based sorbent, Blast furnace slag, Industrial waste utilisation",

author = "Sara Yasipourtehrani and Sicong Tian and Vladimir Strezov and Tao Kan and Tim Evans",

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AU - Yasipourtehrani, Sara

AU - Tian, Sicong

AU - Strezov, Vladimir

AU - Kan, Tao

AU - Evans, Tim

N1 - Copyright the Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - CaO-based calcium looping materials have received great interest for their use in thermochemical CO2 capture and energy storage, as well as CO2-related energy conversion processes. In this paper, the development of robust CaO-based CO2 sorbents using waste blast furnace slag (BFS) as a sustainable and environmentally benign feedstock is reported. Calcium and magnesium in the BFS can be facilely acquired through an acid extraction process, and appear in the form of CaO and MgO, which serve as a CO2 carrier and structural stabiliser, respectively, in the prepared CO2 sorbents. The BFS-derived sorbent prepared in this study exhibited a superior CO2 capture capacity of 0.37 g CO2 /gsorbent with an average cyclic deactivation rate as low as 2.3%, representing a balanced performance between CO2 uptake and cyclic stability as compared to most other waste-derived, CaO-based CO2 sorbents. This study demonstrated that CaO-stabiliser interaction largely determines the CO2 capture performance of CaO-based sorbents, and the Ca/Si ratio in the BFS-derived sorbent should be effectively controlled to allow the material to capture CO2 at a high performance.

AB - CaO-based calcium looping materials have received great interest for their use in thermochemical CO2 capture and energy storage, as well as CO2-related energy conversion processes. In this paper, the development of robust CaO-based CO2 sorbents using waste blast furnace slag (BFS) as a sustainable and environmentally benign feedstock is reported. Calcium and magnesium in the BFS can be facilely acquired through an acid extraction process, and appear in the form of CaO and MgO, which serve as a CO2 carrier and structural stabiliser, respectively, in the prepared CO2 sorbents. The BFS-derived sorbent prepared in this study exhibited a superior CO2 capture capacity of 0.37 g CO2 /gsorbent with an average cyclic deactivation rate as low as 2.3%, representing a balanced performance between CO2 uptake and cyclic stability as compared to most other waste-derived, CaO-based CO2 sorbents. This study demonstrated that CaO-stabiliser interaction largely determines the CO2 capture performance of CaO-based sorbents, and the Ca/Si ratio in the BFS-derived sorbent should be effectively controlled to allow the material to capture CO2 at a high performance.

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KW - Blast furnace slag

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Development of robust CaO-based sorbents from blast furnace slag for calcium looping CO₂ capture

Abstract

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Hot stage separation of non-ferrous fraction during iron ore reduction

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Development of robust CaO-based sorbents from blast furnace slag for calcium looping CO2 capture

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Bibliographical note

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Hot stage separation of non-ferrous fraction during iron ore reduction

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Development of robust CaO-based sorbents from blast furnace slag for calcium looping CO₂ capture