Structural stability and oxygen permeability of BaCo1−Nb O3− ceramic membranes for air separation

CaCoxZr1−xO3−δ Perovskites as Oxygen‐Selective Sorbents for Air Separation

“…Perovskites with Co at B‐sites showed high oxygen mobility, as Co exhibits stable oxidation states of both +3 and +2, allowing reversible oxygen vacancy formation . However, if was the only B‐site cation, these perovskites displayed poor thermal stability owing to the high thermal‐expansion coefficient and phase transition at certain temperature . One way to solve the trade‐off between the oxygen mobility and chemical stability of perovskite materials is to add another metal ion(s) into the B‐site .…”

“…However, if was the only B‐site cation, these perovskites displayed poor thermal stability owing to the high thermal‐expansion coefficient and phase transition at certain temperature . One way to solve the trade‐off between the oxygen mobility and chemical stability of perovskite materials is to add another metal ion(s) into the B‐site . To date, Zr 4+ , Ti 4+ , Nb 5+ , Bi 5+ , Ce 4+ , and Ta 5+ have proven to be successful dopants for stabilizing the oxygen vacancy‐disordered perovskite lattice structure …”

“…[20] One way to solve the trade-off between the oxygen mobility and chemical stability of perovskite materials is to add another metal ion(s) into the B-site. [20] To date, Zr 4 + ,T i 4 + ,N b 5 + ,B i 5 + ,C e 4 + ,a nd Ta 5 + have provent ob es uccessful dopants for stabilizing the oxygen vacancy-disordered perovskite lattice structure. [10,21,22] We have previously reported outstanding low temperature (< 550 8C) redox property of our patented CaCo x Zr 1Àx O 3Àd perovskite-type oxygen storagem aterials (OSMs; in the presence of af uel during reduction steps) and their potential application as oxidation catalysts for automotive emissions abatement.…”

Oxygen permeability and CO2-tolerance of Ce0.9Gd0.1O2−δ – SrCo0.8Fe0.1Nb0.1O3−δ dual-phase membrane

“…The DPM were sealed onto a quartz tube with silver rings at their melting points [2]. The effective inner surface areas of the membrane discs were around 1.3 cm 2 .…”

“…Mixed ionic-electronic conducting (MIEC) ceramic membranes have attracted increasing attention because of their potential applications in the field of oxygen separation [1,2], solid oxide fuel cells (SOFCs) [3,4] and especially in oxy-fuel process for CO 2 capture [5e7] due to greenhouse effect. In the present study, oxy-fuel technology using oxygen permeable membranes is considered as a promising carbon capture technology.…”