| Titre : | High - temperature CO2 capture on Li6Zr2O7 : experimental and modeling studies (2010) |
| Auteurs : | Xian-Sheng Yin, Auteur ; Miao Song, Auteur ; Qin-Hui Zhang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 14, Juillet 2010) |
| Article en page(s) : | pp. 6593–6598 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | CO2 Adsorption monoclinic phase |
| Résumé : | The properties of CO2 adsorption on monoclinic-phase Li6Zr2O7 (m-Li6Zr2O7) in low CO2 concentration stream are studied and compared with tetragonal-phase Li2ZrO3 (t-Li2ZrO3) using thermogravimetric analysis. The results indicate that because of the higher lithium content, about 86.7% capacity can be preserved for m-Li6Zr2O7 (at 1023 K) as the CO2 partial pressure decreases from 1.0 to 0.1 bar, whereas only about 3.5% capacity is preserved for t-Li2ZrO3 (at 848 K). The multicycle test of m-Li6Zr2O7 in 10% CO2 stream exhibits effective performance of CO2 uptake and release, though the capacity reduces gradually. Further, on the basis of the proposed adsorption pathway, a double exponential model is used to simulate the CO2 adsorption processes on m-Li6Zr2O7 with the activation energy of 22.684 and 56.084 kJ/mol for CO2 and Li+ diffusion, respectively, indicating the Li+ diffusion is the limiting step in the adsorption process. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie100710x |
