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.

Enhanced oxygen permeability and electronic conductivity of Ce0.8Gd0.2O2−δ membrane via the addition of sintering aids

2017 ◽  
Vol 310 ◽  
pp. 121-128 ◽  
Author(s):  
Chi Zhang ◽  
Jaka Sunarso ◽  
Zhonghua Zhu ◽  
Shaobin Wang ◽  
Shaomin Liu
Keyword(s):  
Oxygen Permeability ◽  
Electronic Conductivity ◽  
Sintering Aids

High oxygen permeability in fluorite-type Ce0.8Pr0.2O2−δ via the use of sintering aids

2007 ◽  
Vol 299 (1-2) ◽  
pp. 1-7 ◽  
Author(s):  
D.P. Fagg ◽  
A.L. Shaula ◽  
V.V. Kharton ◽  
J.R. Frade
Keyword(s):  
Oxygen Permeability ◽  
High Oxygen ◽  
Sintering Aids ◽  
Fluorite Type

scholarly journals New Synthetic Methods of Novel Nanoporous Polycondensates and Excellent Oxygen Permselectivity of Their Composite Membranes

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 859
Author(s):  
Yu Zang ◽  
Toshiki Aoki ◽  
Masahiro Teraguchi ◽  
Takashi Kaneko ◽  
Hongge Jia ◽  
...  
Keyword(s):  
Contact Angle ◽  
Upper Bound ◽  
Oxygen Permeability ◽  
Membrane Surface ◽  
Composite Membranes ◽  
Synthetic Methods ◽  
Preparation Methods ◽  
First Time

Two kinds of novel nanoporous polycondensates (sc(Rf)) have been synthesized by two new preparation methods consisting of polycondensation and highly selective photocyclicaromataization of 1/3 helical cis-cis polyphenylacetylenes with polymerizable groups. By the original methods, new well-defined sheet polymers having nanopores or nanospaces have been synthesized for the first time. Their composite membranes, containing small amounts (1.0 wt%) of sc(Rf), had ultrahigh oxygen permeability (Po2 > 1000 barrer), and their plots were beyond the Robeson’s upper bound line in the graph of oxygen permselectivity (α = Po2/PN2) versus Po2. Both α and Po2 values were enhanced by adding only small amounts (1.0 wt%) of sc(Rf). One of the sc(Rf)s synthesized on the base membrane surface showed the best performance, i.e., Po2 = 5300 barrer and α = 2.5. The membrane surface was effectively covered by sc(Rf), judging from the contact angle values. It is thought that nanopores and nanospaces created in and between sc(Rf) molecules played an important role for the enhancement of both α and Po2/PN2.

A New Series of Co-Free Oxides with High Oxygen Permeability

1997 ◽  
Vol 130 (2) ◽  
pp. 316-318 ◽  
Author(s):  
Li Siwen ◽  
Yang Weishen ◽  
Fang Lianqing ◽  
Lin Liwu
Keyword(s):  
Oxygen Permeability ◽  
High Oxygen

Ceramic composite membranes based on Bi3Ru3O11 – Bi1,6Er0,4O3 for obtaining of oxygen

2021 ◽  
Vol 6 ◽  
pp. 22-28
Author(s):  
P. E. Dergacheva ◽  
◽  
I. V. Kulbakin ◽  
S. V. Fedorov ◽  
A. S. Lysenkov ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Ceramic Composite ◽  
Oxygen Permeability ◽  
Total Porosity ◽  
Composite Membranes ◽  
Ceramic Composites ◽  
Argon Atmosphere ◽  
Pure Oxygen ◽  
Total Conductivity ◽  
Temperature Dependence Of Conductivity

Using hot uniaxial pressing in an argon atmosphere with a stress of 35 MPa and with a holding at 800 °C for 1 hour, ceramic composites of Bi3Ru3O11 – 50, 65 wt % Bi1,6Er0,4O3 were obtained. It was found that phase composition of the composites does not change during gas chromatographic testing at 800 °C and well corresponds to the specified one. 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 Bi3Ru3O11 and Bi1,6Er0,4O3 components in 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 had been investigated. Thus, at 800 °C the electrical conductivity of Bi3Ru3O11 – 50, 65 wt % Bi1,6Er0,4O3 was about 200 and 50 Ohm–1∙cm–1, respectively, while the metallic nature of their temperature dependence of conductivity is correlated to that for the Bi3Ru3O11. 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 compared to other membrane materials based on bismuth oxide, demonstrated the potential of their further use in the tasks for obtaining of pure oxygen from air.

scholarly journals MULTI-DAY STORAGE OF PLATELETS AT ROOM TEMPERATURE IN A CONTAINER WITH HIGH OXYGEN PERMEABILITY

2005 ◽  
Vol 51 (6) ◽  
pp. 578-584
Author(s):  
Shoji Ezuki ◽  
Takatoshi Ito ◽  
Noriaki Shirahama ◽  
Tadayuki Takagi ◽  
Kazuhiko Ikeda ◽  
...  
Keyword(s):  
Room Temperature ◽  
Oxygen Permeability ◽  
High Oxygen

Novel cobalt-free tantalum-doped perovskite BaFe1−yTayO3−δ with high oxygen permeation

2016 ◽  
Vol 24 (3) ◽  
pp. 339-344 ◽  
Author(s):  
Qing Liao ◽  
Yanjie Wang ◽  
Yan Chen ◽  
Haihui Wang
Keyword(s):  
Oxygen Permeation ◽  
High Oxygen

Study of the Structure and Oxygen Permeability of Cellulose Packaging Films from NMMO-Solutions

2011 ◽  
Vol 380 ◽  
pp. 148-151
Author(s):  
Pei Fang Cheng ◽  
Jian Qing Wang ◽  
Wen Ming Ren
Keyword(s):  
Fruits And Vegetables ◽  
Oxygen Permeability ◽  
Processing Parameters ◽  
High Oxygen ◽  
Raw Material ◽  
Coagulation Bath ◽  
Process Conditions ◽  
Packaging Films ◽  
Cellulose Films ◽  
And Performance

This paper is concerned with the preparation of cellulose packaging films with high oxygen permeability. The films were prepared from cotton pulp and wood pulp by the cast-wiped method using N-methymorpholine-N-oxide (NMMO) as a solvent. The effects of processing parameters on the structure and performance of cellulose films were also studied. The results show that for optimum processing of the films cotton pulp was the preferred raw material, the optimum pulp concentration in the casting solution was 5%, and the optimum temperature for the coagulation bath was 40°C. Using the above process conditions resulted in packaging films with high oxygen permeability making them suitable for use in packaging fruits and vegetables.

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