Article Dans Une Revue Clay Minerals Année : 2025

The effect of different exchangeable cations on the CO2 adsorption capacity of Laponite RD®

Résumé

Tri-octahedral clay minerals have a potential to be used as CO2 sorbents for intermediate temperatures (200-400 °C) owing to their thermal stability in this temperature range. In this study, laponite RD ® , a commercially synthesized hectorite (with Na+ as exchangeable cation) was used to investigate its capacity of CO2 adsorption at 200 °C and ambient pressure. Different cations such as Co2+ , Ni2+ , Mg2+ and Ca2+ were employed to exchange Na+ with the aim to study their effect on the capacity of adsorbing CO2. The commercial sample showed an adsorption capacity of 144 µmolCO2/g. Most of other exchanged sample displayed a deficit in the quantity of CO2 adsorbed. An exception was the Ca 2+ saturated sample, which exhibited a better performance (163 µmolCO2/g) compared to the Laponite RD ® . Thus, with higher affinity towards CO2, such sample could be a good candidate for CO2 capture. For all samples, most of 2 the CO2 was desorbed, and the formation of carbonate bonds was not observed by FTIR spectroscopy suggesting that the CO2 was mainly physisorbed.

Domaines

Matériaux
Fichier sous embargo
Fichier sous embargo
0 5 20
Année Mois Jours
Avant la publication
lundi 14 juillet 2025
Fichier sous embargo
lundi 14 juillet 2025
Connectez-vous pour demander l'accès au fichier

Dates et versions

hal-04885133 , version 1 (14-01-2025)

Licence

Identifiants

Citer

Minh Hoang Nguyen, Liva Dzene, Simona Bennici. The effect of different exchangeable cations on the CO2 adsorption capacity of Laponite RD®. Clay Minerals, inPress, ⟨10.1180/clm.2025.2⟩. ⟨hal-04885133⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

More