Versatile and Resistant Electroless Pore-Plated Pd-Membranes for H2-Separation: Morphology and Performance of Internal Layers in PSS Tubes
Fecha
2022-05-18
Título de la revista
ISSN de la revista
Título del volumen
Editor
MDPI
Resumen
Pd-membranes are interesting in multiple ultra-pure hydrogen production processes, although they can suffer inhibition by certain species or abrasion under fluidization conditions
in membrane reactors, thus requiring additional protective layers to ensure long and stable operation. The ability to incorporate intermediate and palladium films with enough adherence on both external and internal surfaces of tubular porous supports becomes crucial to minimize their complexity and cost. This study addresses the incorporation of CeO2 and Pd films onto the internal side of PSS tubes for applications in which further protection could be required. The membranes so prepared, with a Pd-thickness around 12–15 m, show an excellent mechanical resistance and similar performance to those prepared on the external surface. A good fit to Sieverts’ law with an H2-permeance of 4.571 103 mol m2 s1 Pa0.5 at 400 C, activation energy around 15.031 kJ mol1, and complete ideal perm-selectivity was observed. The permeate fluxes reached in H2 mixtures with N2, He, or CO2 decreased with dilution and temperature due to the inherent concentration-polarization. The presence of CO in mixtures provoked a higher decrease because of a further inhibition effect. However, the original flux was completely recovered after feeding again with pure hydrogen, maintaining stable operation for at least 1000 h
Descripción
Palabras clave
Citación
Martinez-Diaz, D.; Michienzi, V.; Calles, J.A.; Sanz, R.; Caravella, A.; Alique, D. Versatile and Resistant Electroless Pore-Plated Pd-Membranes for H2-Separation: Morphology and Performance of Internal Layers in PSS Tubes. Membranes 2022, 12, 530. https://doi.org/10.3390/membranes12050530
Colecciones

Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution 4.0 International