CO2 Chemisorption and Cyclability Analyses of Lithium Aluminate Polymorphs (α- and β-Li5AlO4)

The α- and β-Li5AlO4 polymorphs were synthesized using a solid-state reaction. The polymorphs were then characterized by X-ray diffraction (XRD), X-ray thermodiffraction (XRTD), and N2 adsorption. To determine the CO2 chemisorption capacity, the lithium aluminate polymorphs were analyzed thermogravi...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2012-02, Vol.51 (6), p.2622-2630
Main Authors: Ávalos-Rendón, Tatiana, Lara, Víctor H, Pfeiffer, Heriberto
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Online Access:Get full text
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Summary:The α- and β-Li5AlO4 polymorphs were synthesized using a solid-state reaction. The polymorphs were then characterized by X-ray diffraction (XRD), X-ray thermodiffraction (XRTD), and N2 adsorption. To determine the CO2 chemisorption capacity, the lithium aluminate polymorphs were analyzed thermogravimetrically in the presence of a CO2 flux. In addition, a cyclability study was performed on these ceramic materials. Although the results appear very similar for the two phases, α-Li5AlO4 exhibits a better CO2 chemisorption performance. The cyclic performance tests indicate that both materials exhibit a gradually reduced chemisorption capacity after multicycle processes. However, even after many cycles, the chemisorption capacity is considerably high in comparison to other lithium ceramics tested as CO2 absorbents.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie201616h