Cyclic CO2 capture characteristics of a pellet derived from sol-gel CaO powder with Ca12Al14O33 support

Luo, Cong, Zheng, Ying, Xu, Yongqing, Ding, Haoran, Zheng, Chuguang, Qin, Changlei and Feng, Bo (2015) Cyclic CO2 capture characteristics of a pellet derived from sol-gel CaO powder with Ca12Al14O33 support. Korean Journal of Chemical Engineering, 32 5: 934-938. doi:10.1007/s11814-014-0291-0


Author Luo, Cong
Zheng, Ying
Xu, Yongqing
Ding, Haoran
Zheng, Chuguang
Qin, Changlei
Feng, Bo
Title Cyclic CO2 capture characteristics of a pellet derived from sol-gel CaO powder with Ca12Al14O33 support
Formatted title
Cyclic CO2 capture characteristics of a pellet derived from sol-gel CaO powder with Ca12Al14O33 support
Journal name Korean Journal of Chemical Engineering   Check publisher's open access policy
ISSN 0256-1115
1975-7220
Publication date 2015-05-01
Year available 2015
Sub-type Article (original research)
DOI 10.1007/s11814-014-0291-0
Volume 32
Issue 5
Start page 934
End page 938
Total pages 5
Place of publication New York, NY United States
Publisher Springer New York
Language eng
Formatted abstract
A novel calcium-based pellet was prepared by extrusion of sol-gel CaO powder and cement with high aluminum-based content. Limestone was used for comparison. The cyclic CO2 capture performance and carbonation kinetics of the sorbents were investigated in a thermogravimetric analyzer (TGA). The changes in phase and microstructure were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer Emmet Teller (BET) surface area, respectively. The results indicate that the pellet consisted of CaO and Ca12Al14O33 after initial calcination. Limestone reactivity decreased dramatically with the increase in the cycle number, whereas the pellet showed a relatively stable cyclic CO2 capture performance with high reactivity. The CO2 capture capacity of the pellet achieved 0.43 g CO2/g sorbent after 50 cycles at 650 °C and 850 °C for carbonation and calcination, respectively. Moreover, the pellet obtained fast carbonation rates with slight decay after multiple cycles. The porous microstructure of the pellet contributed to the high reactivity of the sorbent during high temperature reactions, and the support material of Ca12Al14O33, enhanced the cyclic durability of the calcium-based sorbents.
Keyword CO2 capture
Calcium looping
Pellet
Sol-gel
Limestone
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 2016 Collection
 
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