Novel proton-conducting nanocomposites for hydrogen separation membranes

Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

“…Experimental studies were carried out using a specially built setup. Detailed information about the experimental setup and disk-shaped reactor with axis-symmetric flows has been reported in previous papers [31][32][33]. In the experimental reactor, the assembly of a catalyst-an asymmetric membrane based on Ni + Cu/Nd 5.5 WO 11.25−δ mixed proton-electron conducting nanocomposites [30] was placed between the feed and sweep-side compartments.…”

“…The best results have been obtained at 900 °C and feed of ethanol/H 2 O mixture in Ar at steam-to-carbon ratio of 2. An overall hydrogen flux was achieved to be about 1.31 N mL min −1 cm −2 [ 30 , 31 , 32 , 33 , 34 ].…”

“…% Ru/Sm 0.15 Pr 0.15 Ce 0.35 Zr 0.3 O 2−δ catalyst layer has been successfully tested at ambient pressure and the temperature range of 700-900 • C. The best results have been obtained at 900 • C and feed of ethanol/H 2 O mixture in Ar at steam-to-carbon ratio of 2. An overall hydrogen flux was achieved to be about 1.31 N mL min −1 cm −2 [30][31][32][33][34].…”

Synthesis of Nanocrystalline Complex Oxides in Supercritical Alcohols

“…Various methods are used to synthesize rare-earth metal orthioiobates: the preparation from salts melts [15,16], solid-phase synthesis [11,15,16,17], the sol-gel method [18,19,20], spray pyrolysis (thermal decomposition of aerosol solutions) [12], coprecipitation [21] and mechanochemical synthesis [21,22]. Most of the above methods are multi-stage, time-consuming and require large time and energy spending.…”

“…It should be noted that the size of the monoclinic phase domains decreases with an increase in the calcination temperature, which may be related to the specific dynamics of the transformation process of the tetragonal phase into the monoclinic one, which does not proceed to the end even at 1300°C. In this case, a decrease in the specific surface with increasing annealing temperature indicates an increase in the average particle size of the sample and, therefore, an increase in the density of domain walls with which the channel of rapid diffusion of oxygen ions and protons can be associated [19]. According to IR spectroscopy, the absorption bands in the range of 1500-1400 cm -1 for the lowtemperature sample correspond to carbonates (figure 4).…”