Palladium-Based Alloy Membranes for Separation of High Purity Hydrogen from Hydrogen-Containing Gas Mixtures

Abstract

Palladium-based alloys with yttrium, copper, ruthenium or indium additions were investigated. Their specific hydrogen permeability, strength, linear thermal expansion in hydrogen and corrosion resistance in a number of gas media were determined. This allowed effective membrane elements to be developed using membranes made from these alloys, which are used for the separation of high purity hydrogen from hydrogen-containing gas mixtures. Membrane elements with 93.5 wt% palladium-6 wt% indium-0.5 wt% ruthenium alloy membranes were developed by the authors’ research group, and their technical characteristics are described.

The influence of heat treatment on the thermal stability of Pd composite membranes

“…An increase in thermal stability has also been realized by alloying Pd with other elements such as Ag, Cu, Au, Pt, In, Ru, Y and Rh [4,[13][14][15][16][17][18][19][20][21]. In our recent work [4], we investigated the enhancement in thermal stability of thin Pd-based composite membranes by doping with higher melting point elements such as Ru and Pt.…”

Amorphous Alloy Membranes Prepared by Melt-Spin methods for Long-Term use in Hydrogen Separation Applications

“…∆P=total pressure differential across the membrane reactor. 8 The goal of this study is to develop the amorphous alloy membranes for hydrogen separation and other advanced concepts such as process intensification that provide high purity hydrogen. Figure 1.4 summarizes the activities and technologies associated with hydrogen production and the performance criteria are shown in Table 1-1.…”

Hydrogen Gas Purifiers for Fuel Cells

“…Diffusion to the other side of the membrane and recombination into molecular species results into permeation, driven by the difference in (the square root of) H 2 partial pressure on both sides of the membrane [7], as described by Sievert's law (the typical appearance of Pd alloy membrane is depicted in Fig. 2, as long as its XRD fingerprint).…”