Investigation of Zr-doped BSCF perovskite membrane for oxygen separation in the intermediate temperature range

Ravkina, Olga; Klande, Tobias; Feldhoff, Armin

doi:10.1016/j.jssc.2013.02.023

Cited by 46 publications

(34 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several groups have demonstrated that the undesired phase decomposition of BSCF below ~850-900 °C can be avoided by partial substitution of (Co, Fe) by redox-stable cations such as Nb, Y, and Zr, albeit at the expense of the magnitude of the oxygen flux [17][18][19][20]. The rational behind these substitutions is Goldschmidt's theory as to the relative stability of cubic and hexagonal perovskite structures [14], and to avoid a significant increase in the oxygen stoichiometry, and hence in lowering of the average oxidation state and concomitant change in the radii of the constituent cations upon lowering the temperature (or increasing the ambient oxygen partial pressure).…”

Section: Discussionmentioning

confidence: 99%

“…Typically, these materials possess a fluorite (AO 2 ) or perovskite (ABO 3 ) crystal structure, as depicted in Figure 1.6. High levels of conductivities can be generated through aliovalent cation doping [18]. In addition to their potential application as OTM membrane, the materials hold promise for use as cathode in solid oxide fuel cells (SOFCs) and as gas sensor [19][20][21][22].…”

Section: Oxygen Transport Membranesmentioning

confidence: 99%

“…Immobilisation of the metal citrate complexes in the gel prevents precipitation of the cations, ensuring that the chemical homogeneity is retained in the precursor solution during drying [17]. After drying, the gel is fired at elevated temperature to obtain a finely dispersed powder of metal oxides and/or metal carbonates [18]. A phase-pure ceramic powder is obtained after calcination at a suitable temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Amongst others, creep is a key factor influencing the operational reliability of OTM membranes [17,18]. Creep is known to be more severe in high-temperature environments, and in systems that continuously endure stress gradients [19].…”

Section: Introductionmentioning

confidence: 99%

“…One Zr, Nb, or Y [13][14][15][16][17][18]. However, although these approaches are successful to some extent, these materials are still not sufficiently stable against the reducing and corrosive atmospheres under membrane reactor conditions [8].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Development of stable oxygen transport membranes

Donkelaar

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Oxygen Transport Membranesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of stable oxygen transport membranes

Donkelaar

View full text Add to dashboard Cite

Unconventional Highly Active and Stable Oxygen Reduction Catalysts Informed by Computational Design Strategies

Liu

Jacobs

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

Discovering and engineering new materials with fast oxygen surface exchange kinetics and robust long‐term stability is essential for the large‐scale, economically viable commercialization of solid oxide fuel cell (SOFC) technology. The perovskite catalyst material BaFe0.125Co0.125Zr0.75O3 (BFCZ75), predicted to be promising from recent density functional theory (DFT) calculations and unconventional due to its extremely high Zr content and low electronic conductivity, exhibits oxygen reduction reaction surface exchange rates on par with Ba0.5Sr0.5Co0.8Fe0.2O3 (BSCF) and excellent stability at typical operating temperatures. New composite electrodes are engineered by integrating BFCZ75 with commercial electrode materials La1–xSrxMnO3 (LSM) and La1–xSrxCoyFe1–yO3 (LSCF) and achieve high performance as measured by low area specific resistance (ASR) values, with the LSCF/BFCZ75 ASR values comparable to top performing noncomposite electrode materials such as SrCo0.8Sc0.2O3–δ, BaNb0.05Fe0.95O3–δ and BaCo0.7Fe0.22Y0.08O3–δ. The use of BFCZ75 as a composite with LSCF achieving low ASR values shows that BFCZ75 is highly active and can easily integrate into existing SOFC material supply chains, lowering the barrier for potential commercial application of new electrode materials. Finally, these findings point to a broader unexplored class of perovskite materials with high fractions of redox inactive species (e.g., Zr, Nb, and Ta) that may unlock new pathways to realizing improved commercial SOFCs.

show abstract

Ceramic Membranes: Materials – Components – Potential Applications

et al. 2019

View full text Add to dashboard Cite

Gas separation in dense ceramic membranes is driven by the partial pressure gradient across the membrane. The mixed conducting materials most commonly used are single‐phase perovskites or fluorites. In recent years, the development of dual‐phase systems combining a mixed ion‐conducting and electron‐conducting phase has increased. The advantage is that a larger number of very stable materials systems is available. The membrane designs currently used include planar, tubular, hollow‐fiber, and honeycomb membranes. Each of these designs has specific advantages and disadvantages, depending on the application. Innovative joining concepts are also often needed due to the high temperatures involved. These usually involve the use of glass‐ceramic sealants or reactive metal brazes. Applications focus either on the separation of gases alone, i.e., the supply of oxygen or hydrogen, or on membrane reactors. In membrane reactors, a chemical reaction occurs on one or both sides of the membrane in addition to gas separation. The supply of gases is of potential interest for power plants, for the cement, steel, and glass industries, for the medical sector, and for mobile applications. Membrane reactors can be used to produce base chemicals or synthetic fuels.

show abstract

Investigation of Zr-doped BSCF perovskite membrane for oxygen separation in the intermediate temperature range

Cited by 46 publications

References 34 publications

Development of stable oxygen transport membranes

Development of stable oxygen transport membranes

Unconventional Highly Active and Stable Oxygen Reduction Catalysts Informed by Computational Design Strategies

Ceramic Membranes: Materials – Components – Potential Applications

Contact Info

Product

Resources

About