The effect of trivalent cations on the performance of Mg-M-CO3 layered double hydroxides for high-temperature CO2 capture

Qiang Wang, Hui Huang Tay, Desmond Jia Wei Ng, Luwei Chen, Yan Liu, Jie Chang, Ziyi Zhong, Jizhong Luo*, Armando Borgna

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

111 Scopus citations

Abstract

The effect of trivalent cations on the performance of Mg-M-CO3 (M=Al, Fe, Ga, Mn) layered double hydroxides (LDHs) for high-temperature CO2 capture is systematically investigated for the first time. We demonstrate that the M3+ determines the structure evolution of LDH derivatives under thermal treatment, and finally influences the CO2 capture capacity. Very different calcination temperatures are required for the different LDHs to obtain their maximum CO2 capture capacities. To have a clear understanding of the reason behind these big differences the physicochemical properties, thermal stability, and memory effect of the LDHs were investigated. Both the thermal stability and the memory effect of LDHs are greatly influenced by the type of trivalent cation. The CO2 capture capacities were also evaluated under various conditions. Another important finding of this work is that the quasi-amorphous phase obtained by thermal treatment at the lowest possible temperature gives the highest CO2 capture capacity.

Original languageEnglish
Pages (from-to)965-973
Number of pages9
JournalChemSusChem
Volume3
Issue number8
DOIs
StatePublished - Aug 2010
Externally publishedYes

Keywords

  • Carbon dioxide fixation
  • Cations
  • Hydrotalcites
  • Solid-state structures
  • Water-gas shift

Fingerprint Dive into the research topics of 'The effect of trivalent cations on the performance of Mg-M-CO<sub>3</sub> layered double hydroxides for high-temperature CO<sub>2</sub> capture'. Together they form a unique fingerprint.

Cite this