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

被引：0

作者：

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
]}

机构：

[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

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2019年 / 47卷 / 03期

关键词：

Calcium - Carbon dioxide - Carbonation - Coprecipitation - Molar ratio - Sintering - Sorbents - Sorption;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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 O2-. Ea is tested to be 28.1 kJ/mol for the carbonation reaction of pure CaO sorbent, while Ea 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. © 2019, Science Press. All right reserved.

引用

页码：344 / 351

共 50 条

[1] Effects of Different Dopants and Doping Procedures on the Reactivity of CaO-based Sorbents for CO2 Capture
Al-Jeboori, Mohamad J.
Fennell, Paul S.
Michaela Nguyen
Peng, Ke
ENERGY & FUELS, 2012, 26 (11) : 6584 - 6594
[2] Additive effects of steam addition and HBr doping for CaO-based sorbents for CO2 capture
Gonzalez, Belen
Blamey, John
Al-Jeboori, Mohamad J.
Florin, Nicholas H.
Clough, Peter T.
Fennell, Paul S.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2016, 103 : 21 - 26
[3] Screening CaO-Based sorbents for Co2 capture in biomass gasifiers
Florin, Nicholas H.
Harris, Andrew T.
ENERGY & FUELS, 2008, 22 (04) : 2734 - 2742
[4] Fabrication of CaO-Based Sorbents for CO2 Capture by a Mixing Method
Qin, Changlei
Liu, Wenqiang
An, Hui
Yin, Junjun
Feng, Bo
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2012, 46 (03) : 1932 - 1939
[5] Screening of Binders for Pelletization of CaO-Based Sorbents for CO2 Capture
Manovic, Vasilije
Anthony, Edward J.
ENERGY & FUELS, 2009, 23 (10) : 4797 - 4804
[6] CaO-based sorbents for CO2 capture prepared by ultrasonic spray pyrolysis
Sayyah, Maryam
Ito, Brandon R.
Rostam-Abadi, Massoud
Lu, Yongqi
Suslick, Kenneth S.
RSC ADVANCES, 2013, 3 (43) : 19872 - 19875
[7] CO2 capture at ambient temperature in a fixed bed with CaO-based sorbents
Ridha, Firas N.
Manovic, Vasilije
Macchi, Arturo
Anthony, Edward J.
APPLIED ENERGY, 2015, 140 : 297 - 303
[8] Effect of Repeated Steam Hydration Reactivation on CaO-Based Sorbents for CO2 Capture
Materic, Vlatko
Sheppard, Carolyn
Smedley, Stuart I.
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2010, 44 (24) : 9496 - 9501
[9] Parametric study on the CO2 capture capacity of CaO-based sorbents in looping cycles
Manovic, Vasilije
Anthony, Edward J.
ENERGY & FUELS, 2008, 22 (03) : 1851 - 1857
[10] Mechanism of Particle Breakage during Reactivation of CaO-Based Sorbents for CO2 Capture
Blamey, John
Paterson, Nigel P. M.
Dugwell, Denis R.
Fennell, Paul S.
ENERGY & FUELS, 2010, 24 (08) : 4605 - 4616

← 1 2 3 4 5 →