Volume 42, Issue 6 pp. 1283-1292
Research Article

Stabilized Performance of Al-Decorated and Al/Mg Co-Decorated Spray-Dried CaO-Based CO2 Sorbents

Jian Sun

Jian Sun

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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Yuandong Yang

Yuandong Yang

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

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Yafei Guo

Yafei Guo

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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Chuanwen Zhao

Corresponding Author

Chuanwen Zhao

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

Correspondence: Chuanwen Zhao ([email protected]), 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; Wenqiang Liu ([email protected]), Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, 1037 Luoyu Road, 430074 Wuhan, China.Search for more papers by this author
Jubing Zhang

Jubing Zhang

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, 1037 Luoyu Road, 430074 Wuhan, China

Correspondence: Chuanwen Zhao ([email protected]), 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; Wenqiang Liu ([email protected]), Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, 1037 Luoyu Road, 430074 Wuhan, China.Search for more papers by this author
Ping Lu

Ping Lu

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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First published: 04 April 2019
Citations: 22

Abstract

The sharp loss-in-capacity in CO2 capture as a result of sintering is a major drawback for CaO-based sorbents used in the calcium looping process. The decoration of inert supports effectively stabilizes the cyclic CO2 capture performance of CaO-based sorbents via sintering mitigation. A range of Al-decorated and Al/Mg co-decorated CaO-based sorbents were synthesized via an easily scaled-up spray-drying route. The decoration of Al-based and Al/Mg-based supports efficiently enhanced the cyclic CO2 capture capability of CaO-based sorbents under severe testing conditions. The CO2 capture capacity losses of Al-decorated and Al/Mg co-decorated CaO-based sorbents were alleviated, representing more stable CO2 capture performance. The stabilized CO2 capture performance is mainly attributed to the formation of Ca12Al14O33, MgAl2O4, and MgO that act as the skeleton structures to mitigate the sintering of CaCO3 during carbonation/calcination cycles.

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