Effect of sulfation on CO2 capture of CaO-based sorbents during calcium looping cycle

Luo, Cong, Zheng, Ying, Guo, Jia and Feng, Bo (2014) Effect of sulfation on CO2 capture of CaO-based sorbents during calcium looping cycle. Fuel, 127 124-130. doi:10.1016/j.fuel.2013.09.063


Author Luo, Cong
Zheng, Ying
Guo, Jia
Feng, Bo
Title Effect of sulfation on CO2 capture of CaO-based sorbents during calcium looping cycle
Formatted title
Effect of sulfation on CO2 capture of CaO-based sorbents during calcium looping cycle
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
1873-7153
Publication date 2014-07-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.fuel.2013.09.063
Open Access Status Not yet assessed
Volume 127
Start page 124
End page 130
Total pages 7
Place of publication Oxford, United Kingdom
Publisher Elsevier
Language eng
Formatted abstract
Calcium looping cycle is considered as one of the most promising post combustion CO2 capture technologies that can curb CO2 emissions from power plants fired with fossil fuel. However the presence of SO2 and steam in the flue gas leads to the sulfation of CaO-based sorbents, and thus reduces the sorbents' capacity for CO2 capture. In this study, the effect of sorbent sulfation during both carbonation and calcination stage on the cyclic CO2 capture performance was investigated. The results showed that the reaction time, SO2 concentrations and steam greatly influenced the capacity of CaO-based sorbent. The sulfation degree of the sorbent decreased with the reduction of carbonation and calcination time per cycle. High SO2 concentration present with steam led to a rapid loss in capacity of the sorbent within a few cycles. Furthermore, the synthetic sorbent derived from a sol-gel process had much higher cyclic CO2 capture capacities than natural limestone sorbent whether in conditions without SO2 or with SO2 and steam. Microscopic images showed that after multiple cycles in the presence of SO2 and steam, the porous structure of the synthetic sorbent could be retained while limestone experienced serious pore blockage and agglomeration of grains.
Keyword Calcium looping cycle
CaO-based sorbent
Sulfation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
 
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