Studies of self-supported 1.6μm Pd/23wt.% Ag membranes during and after hydrogen production in a catalytic membrane reactor
2006; Elsevier BV; Volume: 118; Issue: 1-2 Linguagem: Inglês
10.1016/j.cattod.2006.01.041
ISSN1873-4308
AutoresBjørnar Arstad, Hilde J. Venvik, Hallgeir Klette, John C. Walmsley, Wakshum Mekonnen Tucho, Randi Holmestad, Anders Holmen, Rune Bredesen,
Tópico(s)Membrane Separation and Gas Transport
ResumoWater-gas shift (WGS) and methanol steam reforming (MSR) were performed in a catalytic membrane reactor configuration using self-supported Pd/23 wt.% Ag membranes of 1.6 μm thickness. A commercial Cu/ZnO/support catalyst was used. Effects on hydrogen permeation and membrane stability were investigated under the application of relevant conditions. The membranes were studied with X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) before and after usage to characterize the surface composition, microstructure and texture. The self-supported membrane configuration allows exploration of the membrane bulk and surface effects without any influence of a porous support. The extremely low membrane thickness means a greater influence of surface processes compared to thicker membranes.
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