Oxygen permeation and stability investigations on MIEC membrane materials under operating conditions for power plant processes

Engels, Stefan; Markus, T.; Modigell, Michael; Singheiser, L.

doi:10.1016/j.memsci.2010.12.021

Cited by 106 publications

(56 citation statements)

References 23 publications

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“…Electrode materials should exhibit important mixed ionic and electronic conductivity (MIEC) as well as show high efficiency and high stability vs. protons and/or oxygen/hydrogen. Furthermore, they should be also stable vs. other gas components such as CO 2 , NO x which could reduce the stability and the efficiency of the MIEC-materials as well as accelerate its ageing through chemical/structural transitions [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

Upasen

Batocchi

Mauvy

et al. 2015

Ceramics International

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During the last decades, perovskite-type oxides have received large attention as potential electrolytes and electrodes for Solid Oxide Fuel Cells (SOFC), including Proton Ceramic Fuel Cells (PCFC), gas separation membranes and High Temperature Steam Electrolysers (HTSE). A thermal treatment in an autoclave, at a temperature close to an operating temperature, was used to measure the chemical stability of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 À δ (LSCF6428) ceramic under medium and high water pressure ( $20 and 40 bar). This mixed ionicÀ electronic conductor (MIEC) exhibits interesting properties as cathode of fuel cell materials. The reactivity rate of the investigated LSCF6428 sample under the protonation process conditions (several weeks at 550 1C using CO 2 -free and CO 2 -saturated water) was studied in order to evaluate a potential use of this compound. Bulk and surface structural/chemical changes were characterized by optical microscopy, TGA, dilatometry, Raman and ATR-FTIR spectroscopy. The results revealed only minor surface modifications in the case of ceramic treated under medium vapor pressure (20 bar) using CO 2 -free water. On the contrary, under higher pressure (40 bar) and CO 2 -saturated water several second phases were detected, namely strontianite, cobalt oxides and hematite. The chemical/structural stability of LSCF6428 is compared with previously investigated RareEarth nickelate ceramics: La 2 NiO 4 þ δ / Pr 2 NiO 4 þ δ / Nd 2 NiO 4 þ δ .

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Section: Introductionmentioning

confidence: 99%

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

Upasen

Batocchi

Mauvy

et al. 2015

Ceramics International

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“…The stability of BSCF membranes with regard to CO 2 was also discussed. It was also shown that BSCF membranes exhibit the highest permeability [19].…”

Section: Introductionmentioning

confidence: 95%

Oxy-combustion of liquid fuel in an ion transport membrane reactor

Ben‐Mansour

Ahmed

Habib

et al. 2017

Int J Energy Environ Eng

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The present work aims at investigating oxy-fuel combustion of liquid fuels in a concentric parallel tube oxygen transport reactor (OTR) using BSCF ion transport membrane (ITM) for oxygen separation. A computational model was developed and validated utilizing the available experimental results. It is assumed that the same model will be sufficient to capture reasonable results with liquid fuel oxy-combustion. The use of ITMs to produce oxygen for the conversion of liquid fuels into thermal energy in an oxygen transport reactor (OTR) while capturing CO 2 is presented. In this case, the OTR has two functions: O 2 separation and reaction of evaporated liquid fuel with oxygen. A parametric study of the influence of parameters such as oxygen pressure in the feed and the permeate sides on the performance of the OTR is conducted. The effect of the rates of the feed flow and sweep flow on the permeation of oxygen permeation has been evaluated. Subsequently, the effects of flow rates of feed and sweep on temperature and reaction characteristics are also explored. The optimal flow rates and flammability limits for the present geometry model to obtain maximum output are suggested. The feasibility of using liquid fuels as potential fuel to be used in near future oxygen transport reactors is presented. Keywords Liquid fuels Á BSCF Á Ion transport membranes Á Oxygen separation and combustion List of symbols

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“…affect the membrane performance and the material integrity, even causing the membrane mechanical failure [21][22][23][24]. Within the objective to overcome these operational limitations, a large number of research groups have made great efforts in OTM development and new materials have been formulated with improved O2 flux at lower temperatures and under harsh atmospheres, approaching the conditions of industrial target applications as oxyfuel, gasification and chemical and petrochemical reactions [10,[25][26][27][28][29][30][31][32][33][34].…”

Section: Membrane Technology For O2 Separationmentioning

confidence: 99%

Oxygen transport membranes in a biomass/coal combined strategy for reducing CO 2 emissions: Permeation study of selected membranes under different CO 2 -rich atmospheres

et al. 2015

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ElsevierGarcía Fayos, J.; Vert Belenguer, VB.; Balaguer Ramirez, M.; Solis Díaz, C.; Gaudillere, CC.; Serra Alfaro, JM. (2015). Oxygen transport membranes in a biomass/coal combined strategy for reducing CO2 emissions: Permeation study of selected membranes under different CO2-rich atmospheres. Catalysis Today. 257 (2) AbstractThis contribution introduces how the integration of biomass as fuel in power plants would balance CO2 emissions and the related role of oxygen transport membranes (OTM) on it. CO2 capture techniques could be introduced to minimize CO2 emissions at the cost of a substantial energy penalty in the overall process. Among the different approaches, the use of pure O2and/or N2-free oxidation gases for combustion and/or for gasification leads to promising energy efficiencies. Ceramic OTM membranes could be successfully integrated in such thermal processes, which enable to increase the net plant efficiency when CO2 capture is implemented.Further, this work reviews how selected ceramic materials and membrane architectures behave under CO2 containing atmospheres at high temperatures above 700 ºC. These conditions have been selected for checking the viability of these compositions and configurations to fit in an oxy-co-gasification process, involving coal and biomass. The tested asymmetric membranes present promising oxygen fluxes in the range 0.6-1.2 ml·min -1 ·cm -2 when using 100% CO2 as sweep gas at 850 ºC (optimal membrane operation conditions in oxyfuel power plant) and stable oxygen production up to 100 hours of continuous operation in similar conditions. Specifically, La0.6Sr0.4Co0.2Fe0.8O3-δ and NiFe2O4 -Ce0.8Tb0.2O2-δ composite materials showed the best results for oxygen permeation and time stability under CO2-rich atmospheres.

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Oxygen permeation and stability investigations on MIEC membrane materials under operating conditions for power plant processes

Cited by 106 publications

References 23 publications

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

Oxy-combustion of liquid fuel in an ion transport membrane reactor

Oxygen transport membranes in a biomass/coal combined strategy for reducing CO 2 emissions: Permeation study of selected membranes under different CO 2 -rich atmospheres

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