Hydrogen transport through the tubular membranes of V-Pd alloys: Permeation, diffusion, surface processes and WGS mixture test of membrane assembly

Investigation of adsorption, dissociation, and diffusion properties of hydrogen on the V (1 0 0) surface and in the bulk: A first-principles calculation

“…The calculated solution energy ( E sol ) of H atoms in the TIS, DIS, and OIS is −0.346, −0.238, and −0.165 eV for V 16 H, −0.371, −0.336, and −0.228 eV for V 54 H, and −0.41, −0.336, and −0.284 eV for V 128 H, respectively. Our calculations are well matched to the reference values [5], [14], [21], [22]. The E sol value of the TIS is much lower than those of the DIS and OIS within the entire H concentration range, implying that the most stable configuration is the TIS.…”

“…To meet the industrial demand for high-purity H 2 , H 2 purification is necessary. Currently, industrial methods for H 2 recovery mainly include membrane separation, pressure-swing adsorption, and cryogenic separation [4], [5]. Membrane separation is considered the most promising third-generation gas separation technology, after pressure-swing adsorption and cryogenic separation, because it is economical, convenient, efficient, and clean.…”

“…V, which has the highest H diffusion coefficient among group VB metals, is currently considered promising as a H 2 separation material [5], [9]. In addition, V and its alloys are not only considered important H 2 storage materials with a large H capacity [8], but also candidate materials for the first walls and blankets of fusion reactors because of their excellent low activation characteristics under neutron irradiation, remarkable high-temperature performance, and swelling resistance under neutron radiation [10].…”

Hydrogen transport through the V-Cr-Al alloys: Hydrogen solution, permeation and thermal-stability

“…In case of detected N 2 flow by the flow meter, which indicates the presence of cracks or pores in the membrane, a new membrane will be used for hydorgen permeation test. Before each hydrogen permeation test, an air activation step was performed to promote the dissociation and absorption of hydrogen [52]. Then, the feed side and the permeate side were evacuated.…”

Effects of Synthesis Conditions on the PdCu Membrane Structure

“…Alimov et al, electrolessly plated V-κPd tubular membranes with a layer of Pd and the thickness of the coating was from 1 to 2 μm. The synthesized membrane was designed for feeding 1 kW PEMFC and demonstrated a highly productive extraction of ultrapure hydrogen from WGS mixture [13]. Flanagan and Wang prepared Pd-Al alloys by arc melting the pure elements under argon.…”