Thin dense Pd membranes supported on α-Al2O3 hollow fibers

Abstract

Macroporous a-Al 2 O 3 hollow fibers are used as supports for thin dense Pd membranes; these membranes show a high and stable H 2 flux in permeance studies.The increasing demand for H 2 as an energy carrier or chemical in the petroleum industry has promoted research interest in H 2 production, purification and utilization all over the world. 1 As an advanced technology with a compact apparatus and high efficiency, metallic Pd-based membranes have occasionally been applied to separate and purify H 2 for electronic, metallurgic and fine chemical applications. 2 However, the commercialization of Pd-based technology on a large scale does not appear to be likely in the near future, although this technology has been shown to have great potential 3-5 in last four decades.

Effect of metal‐support interface on hydrogen permeation through palladium membranes

“…For electroless plated Pd membranes or cold rolling Pd disks, the activation energy lies between 8-15 kJ/mol if bulk diffusion is a rate-limiting step, or both bulk diffusion and 20,21 being larger than the electroless plated one. 61 The main difference between thin Pd membranes prepared by sputtering and electroless plating is the membrane microstructure with different Pd grain size. The grain size for sputtering method is about 10-20 nm, 31 while it is usually larger than 100 nm for electroless plated one.…”

Low-temperature H2 and N2 transport through thin Pd66Cu34Hx layers

“…The preparation of Pd-seeded g-Al 2 O 3 /a-Al 2 O 3 capillaries and their sealing with ceramic glaze was previously described [17,18]. The a-Al 2 O 3 support had an average pore size of 500 nm, a porosity of 50%, an outer diameter of 0.8 mm and a 0.2 mm thick wall ( Fig.…”

Ceramic Supported Capillary Pd Membranes for Hydrogen Separation: Potential and Present Limitations

“…These capillaries were manufactured by a phase inversion process [33][34][35]. Ceramic powder was dispersed in a polymer solution and the slurry was spun through a spinneret.…”