Effect of synergistic interaction between Ce and Mn on the CO2 capture of calcium-based sorbent: Textural properties, electron donation, and oxygen vacancy

被引：121

作者：

Guo, Hongxia ^{[1
]}

Kou, Xiaochen ^{[1
]}

Zhao, Yujun ^{[1
]}

Wang, Shengping ^{[1
]}

Sun, Qi ^{[1
,2
]}

Ma, Xinbin ^{[1
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Collaborat Innovat Ctr Chem Sci & Engn, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China

[2] Natl Inst Clean & Low Carbon Energy, Beijing 102209, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2018年 / 334卷

基金：

中国国家自然科学基金;

关键词：

CO2; capture; Calcium-based; (Ce-Mn)-doped; Synergistic interaction; CAO-BASED SORBENTS; CARBON-DIOXIDE CAPTURE; CERIA SOLID-SOLUTIONS; LOOPING CYCLE; CATALYTIC-REDUCTION; HYDROGEN-PRODUCTION; OXIDE; STABILITY; OXIDATION; PERFORMANCE;

D O I：

10.1016/j.cej.2017.09.198

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The diffusion of CO2 and mobility of O-2-are the keys to capture of CO2 for CaO-based sorbents. We present a (Ce-Mn)-doped calcium-based sorbent, and investigate the effect of Ce and Mn incorporation on CO2 capture. Interaction between Ce and Mn promotes electron donation from Ca atom to surface oxygen atoms. The stronger the electrons transfer, the stronger interaction between CaO and CO2 is, thus improving CO2 adsorption. Electron transfer between Ce and Mn facilitates oxygen vacancy generation, which improves diffusion and mobility of O2-. In addition, CeO2 and Ca2MnO4 prevent CaO crystallite growth and agglomeration. The (Ce-Mn)-doped sorbents exhibited excellent long-term durability with carbonation capacity of about 0.61 g-CO2/g-ads after 40 cycles.

引用

页码：237 / 246

页数：10

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