Oxygen-permeable NiO/54 wt% δ-Bi2O3 composite membrane

ACS Appl. Mater. Interfaces

et al. 2016

We present a novel solid/liquid Co3O4-36 wt % Bi2O3 composite that can be used as molten oxide membrane, MOM ( Belousov, V. V. Electrical and Mass Transport Processes in Molten Oxide Membranes. Ionics 22 , 2016 , 451 - 469 ), for ultrahigh purity oxygen separation from air. This membrane material consists of Co3O4 solid grains and intergranular liquid channels (mainly molten Bi2O3). The solid grains conduct electrons, and the intergranular liquid channels predominantly conduct oxygen ions. The liquid channels also provide the membrane material gas tightness and ductility. This last property allows us to deal successfully with the problem of thermal incompatibility. Oxygen and nitrogen permeation fluxes, oxygen ion transport number, and conductivity of the composite were measured by the gas flow, volumetric measurements of the faradaic efficiency, and four-probe dc techniques, accordingly. The membrane material showed the highest oxygen selectivity jO2/jN2 > 10(5) and sufficient oxygen permeability 2.5 × 10(-8) mol cm(-1) s(-1) at 850 °C. In the range of membrane thicknesses 1.5-3.3 mm, the oxygen permeation rate was controlled by chemical diffusion. The ease of the MOM fabrication, combined with superior oxygen selectivity and competitive oxygen permeability, shows the promise of the membrane material for ultrahigh purity oxygen separation from air.

Section: Introductionmentioning

confidence: 99%

Novel Molten Oxide Membrane for Ultrahigh Purity Oxygen Separation from Air

Белоусов

Kulbakin

ACS Appl. Mater. Interfaces

et al. 2016

“…To compare the performance of the prepared membrane materials based on Bi 3 Ru 3 O 11 -50 wt % Bi 1.6 Er 0.4 O 3 and Bi 3 Ru 3 O 11 -65 wt % Bi 1.6 Er 0.4 O 3 ceramic composites to other membrane materials based on bismuth oxide [17,18], the oxygen permeability coefficient was calculated using following equation:…”

Section: Methodsmentioning

confidence: 99%

“…5. Temperature dependences for oxygen permeability ( ) of (1) Bi 3 Ru 3 O 11 -50 wt % Bi 1.6 Er 0.4 O 3 and (2) Bi 3-Ru 3 O 11 -65 wt % Bi 1.6 Er 0.4 O 3 composites in comparison to those for some membrane materials of (3) NiO-30 wt % Ag-40 wt % Bi 2 O 3[17] and (4) NiO-54 wt % Bi 2 O 3[18].…”

mentioning

confidence: 94%

Ceramic Composite Membranes Based on Bi3Ru3O11–Bi1.6Er0.4O3 for Obtaining of Oxygen

Dergacheva

Kulbakin

Inorg. Mater. Appl. Res.

et al. 2021

Self Cite

Using hot uniaxial pressing in an argon atmosphere with a stress of 35 MPa and with holding at 800°C for 1 h, ceramic composites of Bi 3 Ru 3 O 11 -50 wt % Bi 1.6 Er 0.4 O 3 and Bi 3 Ru 3 O 11 -65 wt % Bi 1.6 Er 0.4 O 3 were obtained. It was found that phase composition of the composites does not change during gas chromatographic testing at 800°C and corresponds well to the specified one. The microstructure of the obtained composites was tested, and the formation of dense composites with a total porosity of less than 1% and with a uniform distribution of the Bi 3 Ru 3 O 11 and Bi 1.6 Er 0.4 O 3 components in the bulk of material was demonstrated. Transport properties (total conductivity, oxygen fluxes, and selectivity of separating oxygen over nitrogen) of the obtained composites at 600-800°C was investigated. Thus, at 800°C, the electrical conductivity of Bi 3 Ru 3 O 11 -50 wt % Bi 1.6 Er 0.4 O 3 and Bi 3 Ru 3 O 11 -65 wt % Bi 1.6 Er 0.4 O 3 was about 200 and 50 Ω -1 cm -1 , respectively, while the metallic nature of their temperature dependence of conductivity is correlated to that for Bi 3 Ru 3 O 11 . The value of oxygen permeability for the obtained ceramic composites of about 7 × 10 -9 mol cm -1 s -1 at 800°C, which is comparable to other membrane materials based on bismuth oxide, demonstrated the potential of their further use in the tasks for obtaining of pure oxygen from the air.

“…and cermet YSZ-Pd, GDC-Pd, YSB-Ag, and GDC-Ag composite MIEC membrane materials were developed. [13][14][15][16][17][18] In their book, Zhu and Yang 19 have summarized the data on both single-(perovskites) and two-and three-phase (composites) MIEC membrane materials (the reader is referred to this book for more information).…”

mentioning

confidence: 99%

Innovative MIEC-Redox Oxygen Separation Membranes with Combined Diffusion-Bubbling Mass Transfer: A Brief Review

Белоусов

Sedov

2019

J. Electrochem. Soc.

Oxygen plays a crucial role both in human life and in human economic activity and is the third (by volume) product in the world. Accelerated development of advanced energy technologies (solar photovoltaic and petrochemical industries) as well as biotechnology has stimulated the demand for ultra-high purity oxygen (above 99.999% purity). A newly developed copper and vanadium oxidebased two-layer mixed ionic electronic conducting -redox (MIEC-Redox) membrane with combined diffusion-bubbling oxygen mass transfer is of technological interest for ultra-high purity oxygen production as it demonstrates excellent oxygen selectivity and is easily made of affordable and inexpensive materials. Fundamental understanding of the formation, microstructure, and transport properties of MIEC-Redox membranes is important to be able to synthesize them in a controlled way and assess their potential for technological exploitation. The present article highlights the latest progress made in developing this understanding and outlines the further research directions. The ways to enhance the efficiency of oxygen separation through using these innovative diffusion-bubbling membranes are discussed. The proposed strategy of transition metal oxides-based thick membrane materials with fast combined diffusion-bubbling oxygen mass transfer opens up new vista for the design of next-generation energy materials with enhanced oxygen transport.