The Study of the Oxygen Permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Membranes after Laser Ablation

2011 ◽  
Vol 284-286 ◽  
pp. 1427-1430
Author(s):  
Zi Gang Shen ◽  
Xiao Rui Guo ◽  
Dong Li
Keyword(s):  
Laser Ablation ◽  
Specific Surface ◽  
Oxygen Permeability ◽  
Oxygen Permeation ◽  
Arc Shape

The surfaces of Ba0.5Sr0.5Co0.8Fe0.2O3−δ(BSCFO) membranes were decorated by laser ablation treatment in order to increase the specific surface of these membranes. Arc shape stripes with width about 150µm and depth about 25µm were formed on the surface of these membranes. The oxygen permeation fluxes through these membranes were measured. Comparing with the membrane without laser ablation treatment, the oxygen permeation fluxes through the membranes with cross stripes pattern decorated on both sides after laser ablation treatment can increase by 34.7%.

Influence of Laser Ablation on the Oxygen Permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Membranes

2014 ◽  
Vol 633 ◽  
pp. 225-229
Author(s):  
Zi Gang Shen ◽  
Dong Li
Keyword(s):  
Laser Ablation ◽  
Specific Surface ◽  
Oxygen Permeability ◽  
Oxygen Permeation

After laser ablation treatment, there are grooves on the surfaces of Ba0.5Sr0.5Co0.8Fe0.2O3δ(BSCFO) membranes. These grooves with width about 150μm and depth about 25μm increase the specific surface of these membranes. The oxygen permeation fluxes through these membranes, which sides were treatment by laser ablation, were measured. Comparing with the membrane without laser ablation treatment, the oxygen permeation fluxes through the membranes with cross grooves pattern decorated on both sides after laser ablation treatment can increase by 34.7%.

scholarly journals Preparation and Oxygen Permeability of BaCo0.7Fe0.2Nb0.1O3-δMembrane Modified by Ce0.8Y0.2O2-δPorous Layer on the Air Side

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Yuan Qiang ◽  
Zhen Qiang ◽  
Li Rong
Keyword(s):  
Porous Layer ◽  
Oxygen Permeability ◽  
Ceramic Membrane ◽  
Coke Oven ◽  
Xrd Analysis ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Dense Ceramic ◽  
Oxygen Permeation Flux

BaCo0.7Fe0.2Nb0.1O3−δ(BCFN) dense ceramic membrane with submicron-Ce0.8Y0.2O2−δ(YDC) porous layer was investigated by the partial oxidation of coke oven gas (COG) in hydrogen production. XRD analysis showed this composite had good stability and no chemical reaction at high temperature. SEM and TEM characterization further showed BCFN membrane was uniformly modified by YDC porous layer (about 5~6 μm thickness) formed by the accumulation of relative nanoparticles. At the respective COG flux and air flux of 108 mL/min and 173 mL/min, the oxygen permeation flux of BCFN modified by submicron-YDC porous layer reached 16.62 mL·min−1·cm−2, which was about 23.5% higher than that of pure BCFN membrane. Therefore, submicron-YDC porous layer obviously improved the oxygen permeation flux of BCFN membrane and its stability at 875°C.

Oxygen Permeability of Mixed Conducting Perovskite Lanthanum Gallate-Based Ceramics

2006 ◽  
Vol 514-516 ◽  
pp. 412-416 ◽  
Author(s):  
Ekaterina D. Politova ◽  
Vladimir V. Aleksandrovskii ◽  
Sergey V. Zaitsev ◽  
G.M. Kaleva ◽  
Alexander V. Mosunov ◽  
...  
Keyword(s):  
Oxygen Permeability ◽  
Oxygen Permeation ◽  
Lanthanum Gallate ◽  
Electric Transport ◽  
Permeability Characteristics ◽  
Permeation Properties

The structure, microstructure, electric transport and oxygen permeation properties of (La,Sr)(Ga,Mg,Fe)O3-δ ceramics with perovskite or brownmillerite structures have been studied. Oxygen permeability values of ~0.1 cm3/cm2·min has been revealed at 1000 K for the ceramics studied. The correlation of electroconducting properties of the LaGaO3-based ceramics with perovskite and brownmillerite structures to their oxygen permeability characteristics has been proved.

scholarly journals Effective calcium doping at the B-site of BaFeO3−δ perovskite: towards low-cost and high-performance oxygen permeation membranes

2017 ◽  
Vol 5 (17) ◽  
pp. 7999-8009 ◽  
Author(s):  
Yao Lu ◽  
Hailei Zhao ◽  
Kui Li ◽  
Xuefei Du ◽  
Yanhui Ma ◽  
...  
Keyword(s):  
High Performance ◽  
Oxygen Permeability ◽  
Low Cost ◽  
Cost Effective ◽  
Oxygen Permeation ◽  
Effective Strategy ◽  
Highly Efficient ◽  
Cost Effective Strategy ◽  
Calcium Doping

A highly efficient and cost-effective strategy for doping Ca at the B-site of BaFeO3−δ was demonstrated to enhance oxygen permeability.

Study on the Performance of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Membrane after Laser Ablation for Methane Conversion

2011 ◽  
Vol 311-313 ◽  
pp. 2397-2400
Author(s):  
Zi Gang Shen ◽  
Xiao Rui Guo ◽  
Wu Qing Zhang ◽  
Li Jun Pan
Keyword(s):  
Laser Ablation ◽  
Partial Oxidation ◽  
Methane Conversion ◽  
Membrane Reactor ◽  
Space Velocity ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Oxidation Of Methane ◽  
Oxygen Permeation Flux ◽  
Shaped Pattern

A cross-shaped pattern was formed on the surface of Ba0.5Sr0.5Co0.8Fe0.2O3−δoxygen permeation membrane by laser ablation in order to increase the specific surface area of the membrane. The membrane was used to assemble a reactor for partial oxidation of methane (POM) to syngas in the present of Ni/ZrO2catalyst. The CH4conversion and CO selectivity of the membrane reactor can reach 98.8% and 91.5%, respectively, and the oxygen permeation flux through the membrane was 11.0 ml/cm2min at 850°C. The effect of space velocity (SV) on CH4conversion rate and CO selectivity in such reactor was discussed.

scholarly journals CO2-Tolerant Oxygen Permeation Membranes Containing Transition Metals as Sintering Aids with High Oxygen Permeability

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 528
Author(s):  
Xiaopeng Wang ◽  
Lei Shi ◽  
Yanhao Huang ◽  
Lingyong Zeng ◽  
Mebrouka Boubeche ◽  
...  
Keyword(s):  
Oxygen Permeability ◽  
Electronic Conductivity ◽  
Composite Membranes ◽  
Oxygen Permeation ◽  
High Oxygen ◽  
Fluorite Phase ◽  
Chemical Doping ◽  
Sintering Aids ◽  
High Efficient ◽  
Two Phases

Chemical doping of ceramic oxides may provide a possible route for realizing high-efficient oxygen transport membranes. Herein, we present a study of the previously unreported dual-phase mixed-conducting oxygen-permeable membranes with the compositions of 60 wt.%Ce0.85Pr0.1M0.05O2-δ-40 wt.%Pr0.6Sr0.4Fe0.8Al0.2O3-δ (M = Fe, Co, Ni, Cu) (CPM-PSFA) adding sintering aids, which is expected to not only improve the electronic conductivity of fluorite phase, but also reduce the sintering temperature and improve the sintering properties of the membranes. X-ray powder diffraction (XRD) results indicate that the CPM-PSFA contain only the fluorite and perovskite two phases, implying that they are successfully prepared with a modified Pechini method. Backscattered scanning electron microscopy (BSEM) results further confirm that two phases are evenly distributed, and the membranes are very dense after sintering at 1275 °C for 5 h, which is much lower than that (1450 °C, 5 h) of the composite 60 wt.%Ce0.9Pr0.1O2-δ-40 wt.%Pr0.6Sr0.4Fe0.8Al0.2O3-δ (CP-PSFA) without sintering aids. The results of oxygen permeability test demonstrate that the oxygen permeation flux through the CPCu-PSFA and CPCo-PSFA is higher than that of undoped CP-PSFA and can maintain stable oxygen permeability for a long time under pure CO2 operation condition. Our results imply that these composite membranes with high oxygen permeability and stability provide potential candidates for the application in oxygen separation, solid oxide fuel cell (SOFC), and oxy-fuel combustion based on carbon dioxide capture.

Oxygen Permeability of Ba0.5Sr0.5Co0.8Fe0.2O5+δMembrane after Surface Modification

2013 ◽  
Vol 275-277 ◽  
pp. 2394-2397
Author(s):  
Zi Gang Shen ◽  
Dong Li
Keyword(s):  
Surface Modification ◽  
Thin Layer ◽  
Oxygen Permeability ◽  
Coating Layer ◽  
Oxygen Permeation

The oxygen permeation fluxes of Ba0.5Sr0.5Co0.8Fe0.2O5+(BSCF) membranes coated by RBaCo2O5+ (R= Pr, Nd, Sm, Gd) thin layer were investigated. The oxygen permeation fluxes of BSCF membranes with RBaCo2O5+ (R112)R112 coating layer can be enhanced remarkably. And it is found that the reaction of R112 with BSCF also have effect on the oxygen permeation fluxes. Impurity formed by the reaction of Pr112 with BSCF block oxygen permeation. While NdBaCo2O5+ and SmBaCo2O5+, especially GdBaCo2O5+ have no serious reaction with BSCF, they are desirable materials for coating layer of oxygen permeation membranes.

Preparation and Oxygen Permeability of ReBaCo2O5+δ (Re = Pr, Nd, Y) Ceramic Membranes

2012 ◽  
Vol 560-561 ◽  
pp. 959-964 ◽  
Author(s):  
Jong Pyo Kim ◽  
Dae Woong Pyo ◽  
Edoardo Magnone ◽  
Jung Hoon Park
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Solid State ◽  
Oxygen Permeability ◽  
Ceramic Membranes ◽  
Solid State Reaction Method ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Reaction Method ◽  
Oxygen Permeation Flux

ReBaCo2O5+δ (Re=Pr, Nd, Y) oxides were synthesized by solid state reaction method. The oxygen permeation flux of ReBaCo2O5+δ (Re=Pr, Nd, Y) membranes increased with temperature and oxygen partial pressure and ranked as follow: PrBaCo2O5+δ > NdBaCo2O5+δ > YBaCo2O5+δ. The oxygen permeation response of PrBaCo2O5+δ membrane was fairly stable and no detectable degradation is observed at high temperature under carbon dioxide conditions (CO2 = 500 ppm).

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