Ce0.85Sm0.15O2-Sm0.6Sr0.4Al0.3Fe0.7O3 composite for the preparation of dense ceramic-carbonate membranes for CO2 separation

Mixed-conducting ceramic-carbonate membranes exhibiting high CO2/O2 permeation flux and stability at high temperatures

“…As expected, membranes show a simultaneous permeation of O 2 and CO 2 (Figs. 8 and 9) with the typical behavior already reported, regarding the increase of the permeation flux values (J O2 and J CO2 ) as a function of the temperature [16,20,23,41]. This fact confirms that the diffusion of the species is thermally activated.…”

“…As mentioned, one of the most attractive properties of fluorite-perovskite composites for the manufacture of membranes is their chemical stability under CO 2 containing atmospheres [23][24][25]37]. This property is a fundamental requirement for its application in membranes for CO 2 separation [16,18,23] and membrane reactors [38]. The chemical tolerance to CO 2 of the different membrane supports was determined experimentally by its exposure to a 100% CO 2 atmosphere.…”

“…respectively. This ceramic-carbonate membrane shows excellent perm-selectivity properties and simultaneous high CO 2 /O 2 permeation flux density at elevated temperatures between 700 and 900 ℃ [23]. Considering the properties of the composite ceramic phase, the transport of CO 2 and O 2 species must involve the three previously discussed mechanisms (Eqs.…”

“…Recently, a novel sort of MIECC-based ceramiccarbonate membrane has been reported [23][24][25]. The distinctive feature of this membrane is that ceramic phase is made of a fluorite-perovskite composite exhibiting well separated grains of the two phases; which are an oxygen ionic conductor (Ce 0.85 Sm 0.15 O 2 ) and an ionic-electronic conductor (Sm 0.6 Sr 0.4 Al 0.3 Fe 0.7 O 3 )…”

Dendritic silver self-assembly in molten-carbonate membranes for efficient carbon dioxide capture

“…10 However, there remain a number of challenges to address, specifically, determining permeation mechanisms and increasing separation performance whilst maintaining high temperature stability. 3 Dual-phase membranes can, in general, be categorised into two classes based on the nature of the solid support; ceramiccarbonate, [11][12][13][14][15][16][17][18][19][20][21][22][23] and metal-carbonate. [24][25][26][27][28][29][30][31][32][33] More recently, a combination of the two has been explored.…”