Operation of perovskite membrane under vacuum and elevated pressures for high-purity oxygen production

Zhu, Xuefeng; Sun, Shumin; Ye, Cong; Yang, Weishen

doi:10.1016/j.memsci.2009.08.020

Cited by 66 publications

(38 citation statements)

References 22 publications

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“…This modeling result agrees with the our previous experimental and model findings on tubular BSCF membranes. 29,43 From Figure 12, one can find that the difference of oxygen flux brought by the two permeation oxygen pressures becomes smaller during the enhancement of air pressure, especially for the membrane operated at higher temperature. The permeation resistance r 0 decreases quickly with the increase of air pressure; and under a higher permeation oxygen pressure (0.1 bar), r 0 decreases more quickly, as shown in Figure 13.…”

Section: Influences Of Oxygen Partial Pressurementioning

confidence: 99%

“…However, it is difficult to obtain such experimental data in laboratories, because the sealing of membranes at high temperatures and high pressures is still a big problem up to now. 29 Therefore, it is interesting and necessary to predict the oxygen permeation performance of BSCF membranes at high-operating pressures using model approach. To do this, here we need to assume that the three resistance constants do not change significantly at high pressure.…”

Section: Influences Of Oxygen Partial Pressurementioning

confidence: 99%

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Permeation model and experimental investigation of mixed conducting membranes

Zhu

Liu

et al. 2011

AIChE Journal

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A simple oxygen permeation model was developed based on the theoretical analysis of the role of interfaces of mixed conducting membranes. The developed model equations contain three resistance constants, which can be determined by correlating oxygen permeation flux to oxygen partial pressure on each side. A series of experimental measurements of oxygen fluxes of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3À membranes over a wide range of temperature and oxygen partial pressures were tested for the regression of three resistance constants with good correlation (R > 0.997). With this model, the interfacial exchange resistances of each side can be well distinguished from the bulk-diffusion resistance under a wide-temperature range. The kinetics parameters, including interfacial exchange coefficients on each side and ionic diffusion coefficient, can be obtained through the three resistance constants. Parametric studies can predict the influences of membrane thickness, oxygen partial pressures on oxygen flux, distribution of permeation resistances, and characteristic thickness.

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Section: Influences Of Oxygen Partial Pressurementioning

confidence: 99%

Section: Influences Of Oxygen Partial Pressurementioning

confidence: 99%

Permeation model and experimental investigation of mixed conducting membranes

Zhu

Liu

et al. 2011

AIChE Journal

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“…Promising oxygen permeation have been obtained in many perovskite systems (Zhu et al, 2009;Stiegel, 1999). The dense perovskite type membranes transport oxygen as lattice ions at elevated temperatures with infinite selectivity ratios in O 2 separations.…”

Section: Gas Separationmentioning

confidence: 99%

Membrane Operations for Industrial Applications

Buonomenna¹,

Golemme²,

Perrotta³

2012

Advances in Chemical Engineering

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“…OTM technology has the potential to improve the process efficiency of a number of systems e.g. syngas production from methane [2][3][4]. In large-scale industrial syngas production, reactors operate in the temperature range of 700-1050 °C with a pressure between 2-4 MPa to achieve significant conversion efficiencies, and have very reducing atmospheres containing aggressive gases such as CO, CO 2 and H 2 S. Hence, the ceramic oxygen membrane materials and their auxiliary parts have to be both chemically and structurally stable in order to withstand these harsh conditions for long periods of time.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the microstructure of porous MgO supports for asymmetric oxygen separation membranes: Optimization of thermoplastic feedstock systems

Ramachandran

Clemens

Glasscock

et al. 2014

Ceramics International

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. (2014). Tailoring the microstructure of porous MgO supports for asymmetric oxygen separation membranes: Optimization of thermoplastic feedstock systems. Ceramics International, 40, 10465-10473. DOI: 10.1016/j.ceramint.2014 Author's Accepted Manuscript This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractPorous magnesium oxide (MgO) structures were prepared by thermoplastic processing for use as supports in asymmetric thin film oxygen transport membranes (OTMs). The open porosity, pore size distribution, and resulting gas permeability of the MgO structures were measured for different feedstock compositions and sintering temperatures. For a composition with 19 vol.% graphite as a pore-former, sintering temperatures of 1300 °C and 1400 °C, resulted in support porosities of 36% and 26%, respectively, and gas permeabilities of 1.4 × 10 -16 m 2 and 3.1 × 10 -16 m 2 , respectively. Electron microscopy showed that the unexpected increase in gas permeability at temperatures above 1300 °C was a result of the growth of macro-pores and the opening of bottle-neck pores which resulted in improved pore connectivity. Mercury intrusion porosimetry experiments confirmed an increase in average pore size for samples sintered above 1300 °C, despite a significant decrease in total porosity. KeywordsOxygen transport membranes (OTM), magnesium oxide, thermoplastic feedstock, porous support, microstructure.

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Operation of perovskite membrane under vacuum and elevated pressures for high-purity oxygen production

Cited by 66 publications

References 22 publications

Permeation model and experimental investigation of mixed conducting membranes

Permeation model and experimental investigation of mixed conducting membranes

Membrane Operations for Industrial Applications

Tailoring the microstructure of porous MgO supports for asymmetric oxygen separation membranes: Optimization of thermoplastic feedstock systems

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