La2NiO4 tubular membrane reactor for conversion of methane to syngas

Oxygen permeability, stability and electrochemical behavior of % MathType!Translator!2!1!AMS LaTeX.tdl!TeX -- AMS-LaTeX! % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX % garmWu51MyVXgatuuDJXwAK1uy0HwmaeHbfv3ySLgzG0uy0Hgip5wz % aebbnrfifHhDYfgasaacH8qrps0lbbf9q8WrFfeuY-Hhbbf9v8qqaq % Fr0xc9pk0xbba9q8WqFfea0-yr0RYxir-Jbba9q8aq0-yq-He9q8qq % Q8frFve9Fve9Ff0dmeaabaqaciGacaGaaeqabaWaaeWaeaaakeaaci % GGqbGaaiOCamaaBaaaleaacaaIYaaabeaakiaab6eacaqGPbGaae4t % amaaBaaaleaacaaI0aGaey4

“…Solid solutions based on rare-earth nickelates with K 2 NiF 4 -type structure, A 2 NiO 4AEd , are a promising group of mixedconducting materials with potential applications for the cathodes of intermediate-temperature solid oxide fuel cells (IT SOFCs) and oxygen-separation membranes [1][2][3][4][5][6][7][8][9][10][11]. For these systems, the maximum emphasis in literature was focused on lanthanum nickelate, La 2 NiO 4þd .…”

“…The oxygen permeation through dense lanthanum nickelate membranes is essentially limited by kinetics of redox processes at the surface [1,3]; this prevents bulk decomposition and enables stable operation under air/CH 4 gradients up to temperatures as high as 1150-1170 K [12]. Also, partial reduction of the membrane surface exposed to reducing atmosphere results in formation of porous La 2 O 3 -supported Ni catalyst layer, which may provide a high selectivity towards partial oxidation of methane [8]. The crystal structure of La 2 NiO 4þd is built of alternating rocksalt La 2 O 2 and perovskite NiO 2 layers, and can accommodate a significant oxygen excess.…”

Preparation and electrochemical properties of La1.0Sr1.0FeO4+δ as cathode material for intermediate temperature solid oxide fuel cells

“…For steady-state polarization measurement of the half-cells, IR radiation was compensated. clearly observed that LSF1010 crystallized in a single phase with K 2 NiF 4 -type structure, and no impurities were found [17,24,25]. As we have known that reaction between the electrode materials and electrolyte is undesirable for the long-term stability of a SOFC.…”

Synthesis gas production in a novel hydrogen and oxygen perm-selective membranes tri-reformer for methanol production

“…The studies of this type of membrane showed that the driving force for oxygen permeation through a dense membrane is the difference of oxygen partial pressures across the membrane (Bouwmeester, 2003;Chan et al, 2003;Diethelm et al, 2003;Ishihara et al, 2002;Li et al, 2000;Tsai et al, 1997;Wang et al, 2002;Zhu et al, 2003). In addition, the permeation of oxygen becomes significant at the membrane temperature of above 1000 K that is very similar to the operating temperature of partial oxidation of methane.…”