Improving the performance of oxygen transport membranes in simulated oxy-fuel power plant conditions by catalytic surface enhancement

Pirou, Stéven; García‐Fayos, Julio; Balaguer, María; Kiebach, Ragnar; Serra, José M.

doi:10.1016/j.memsci.2019.03.027

Cited by 9 publications

(1 citation statement)

References 47 publications

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“…Since the surface activation layer in our study does not change the activation energy, these surface exchange limitations do not result from the free membrane surface, but the low surface area at the membrane/support interface. These limitations can be alleviated by the improvement of the support and the catalytic layer by optimizing their structural parameters, especially the increase in the surface area and by infiltration of catalytic nanoparticles [19,20,34,35]. is observed, this improvement being around 12% for 700 mL•min −1 argon sweep at 750 • C. The improvement is related to the dilution of oxygen in the permeate side.…”

Section: Oxygen Permeation Resultsmentioning

confidence: 99%

Development and Proof of Concept of a Compact Metallic Reactor for MIEC Ceramic Membranes

et al. 2021

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The integration of mixed ionic–electronic conducting separation membranes in catalytic membrane reactors can yield more environmentally safe and economically efficient processes. Concentration polarization effects are observed in these types of membranes when O2 permeating fluxes are significantly high. These undesired effects can be overcome by the development of new membrane reactors where mass transport and heat transfer are enhanced by adopting state-of-the-art microfabrication. In addition, careful control over the fluid dynamics regime by employing compact metallic reactors equipped with microchannels could allow the rapid extraction of the products, minimizing undesired secondary reactions. Moreover, a high membrane surface area to catalyst volume ratio can be achieved. In this work, a compact metallic reactor was developed for the integration of mixed ionic–electronic conducting ceramic membranes. An asymmetric all-La0.6Sr0.4Co0.2Fe0.8O3–δ membrane was sealed to the metallic reactor by the reactive air brazing technique. O2 permeation was evaluated as a proof of concept, and the influence of different parameters, such as temperature, sweep gas flow rates and oxygen partial pressure in the feed gas, were evaluated.

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Section: Oxygen Permeation Resultsmentioning

confidence: 99%