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High CO2 permeation using a new Ce0.85Gd0.15O2-δ-LaNiO3 composite ceramic–carbonate dual-phase membrane.
- Source :
-
Journal of Environmental Sciences (Elsevier) . Jun2024, Vol. 140, p219-229. 11p. - Publication Year :
- 2024
-
Abstract
- This work shows the synthesis, characterization and evaluation of dense-ceramic membranes made of Ce 0.85 Gd 0.15 O 2-δ -LaNiO 3 (CG-LN) composites, where the fluorite-perovskite ratio (CG:LN) was varied as follows: 75:25, 80:20 and 85:15 wt.%. Supports were initially characterized by XRD, SEM and electrical conductivity (using vacuum and oxygen atmospheres), to determine the composition, microstructural and ionic-electronic conductivity properties. Later, supports were infiltrated with an eutectic carbonates mixture, producing the corresponding dense dual-phase membranes, in which CO 2 permeation tests were conducted. Here, CO 2 permeation experiments were performed from 900 to 700°C, in the presence and absence of oxygen (flowed in the sweep membrane side). Results showed that these composites possess high CO 2 permeation properties, where the O 2 addition significantly improves the ionic conduction on the sweep membrane side. Specifically, the GC80-LN20 composition presented the best results due to the following physicochemical characteristics: high electronic and ionic conductivity, appropriate porosity, interconnected porous channels, as well as thermal and chemical stabilities between the composite support and carbonate phases. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10010742
- Volume :
- 140
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Sciences (Elsevier)
- Publication Type :
- Academic Journal
- Accession number :
- 175298050
- Full Text :
- https://doi.org/10.1016/j.jes.2023.07.018