A Carbide Slag-Based, Ca 12 Al 14 O 33 -Stabilized Sorbent Prepared by the Hydrothermal Template Method Enabling Efficient CO 2 Capture

Xiaotong Ma, Yingjie Li, Yi Qian and Zeyan Wang
Additional contact information
Xiaotong Ma: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Yingjie Li: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Yi Qian: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Zeyan Wang: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

Energies, 2019, vol. 12, issue 13, 1-17

Abstract: Calcium looping is a promising technology to capture CO 2 from the process of coal-fired power generation and gasification of coal/biomass for hydrogen production. The decay of CO 2 capture activities of calcium-based sorbents is one of the main problems holding back the development of the technology. Taking carbide slag as a main raw material and Ca 12 Al 14 O 33 as a support, highly active CO 2 sorbents were prepared using the hydrothermal template method in this work. The effects of support ratio, cycle number, and reaction conditions were evaluated. The results show that Ca 12 Al 14 O 33 generated effectively improves the cyclic stability of CO 2 capture by synthetic sorbents. When the Al 2 O 3 addition is 5%, or the Ca 12 Al 14 O 33 content is 10%, the synthetic sorbent possesses the highest cyclic CO 2 capture performance. Under harsh calcination conditions, the CO 2 capture capacity of the synthetic sorbent after 30 cycles is 0.29 g/g, which is 80% higher than that of carbide slag. The superiority of the synthetic sorbent on the CO 2 capture kinetics mainly reflects at the diffusion-controlled stage. The cumulative pore volume of the synthetic sorbent within the range of 10–100 nm is 2.4 times as high as that of calcined carbide slag. The structure of the synthetic sorbent reduces the CO 2 diffusion resistance, and thus leads to better CO 2 capture performance and reaction rate.

Keywords: carbide slag; calcium aluminates; calcium looping; CO 2 capture (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/13/2617/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/13/2617/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:13:p:2617-:d:246442

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().