Citation: YANG Bin, YU Zhong-liang, LI Chun-yu, ZHOU Xing, GUO Shuai, LI Guang, ZHAO Jian-tao, FANG Yi-tian. Influence of cerium doping on CO₂ capture of CaO-based sorbents[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(3): 344-351. shu

Influence of cerium doping on CO₂ capture of CaO-based sorbents

YANG Bin ^1,2 ,
YU Zhong-liang ^1,, ,
LI Chun-yu ¹ ,
ZHOU Xing ^1,2 ,
GUO Shuai ^1,2 ,
LI Guang ^1,2 ,
ZHAO Jian-tao ^1,, ,
FANG Yi-tian ¹

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: YU Zhong-liang, yuzl@sxicc.ac.cn ZHAO Jian-tao, zhaojt@sxicc.ac.cn
Received Date: 21 December 2018
Revised Date: 22 January 2019

Fund Project: The project was supported by the National Key Research and Development Program of China (2018YFB0605401-03)The project was supported by the National Key Research and Development Program of China 2018YFB0605401-03

Figures(9)

The CeO₂-doped CaO-based sorbent was prepared by the homogeneous precipitation method using P123 as the soft template. The influence of CeO₂ doping on the capture of CO₂ was investigated. The CeO₂ doping can promote the formation of surface oxygen species, and facilitate the carbonation reaction. The interactions in CaO-CeO₂ lead to the electrons transfer from Ca to surface oxygen species. Moreover, when Ce ions are substituted by Ca ions, the charge neutrality is destroyed in the CeO₂ crystal, which promotes the formation of oxygen vacancies and O^2-. E_a is tested to be 28.1 kJ/mol for the carbonation reaction of pure CaO sorbent, while E_a decreases to the minimal value of 10.2 kJ/mol when adding CeO₂ to CaO sorbent with a Ce/Ca molar ratio of 0.25. Also, the doping of CeO₂ is beneficial to the high dispersion of CaO and prevention of CaO sintering. The Ce-doped sorbents exhibit a superior capture capacity and cyclic stability in carbonation/calcination cycles.
- CaO-based sorbent,
- CO₂ capture,
- CeO₂-doped,
- carbonation
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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of cerium doping on CO2 capture of CaO-based sorbents

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通讯作者: 陈斌, bchen63@163.com

Influence of cerium doping on CO₂ capture of CaO-based sorbents