Thermal stability and effect of typical water gas shift reactant composition on H2 permeability through a Pd-YSZ-PSS composite membrane

摘要: Abstract This work comprises a study of hydrogen separation with composite Pd-YSZ-PSS membrane from mixtures H2, N2, CO and CO2, typical water gas shift reactor. The Pd layer is extended over tubular porous stainless steel support (PSS) an intermediate yttria-stabilized-zirconia (YSZ). YSZ layers were incorporated the PSS using Atmospheric Plasma Spraying Electroless Plating techniques, respectively. thickness values are 13.8 100 μm, respectively, fully dense. Permeation measurements pure, binary ternary gases at different temperatures (350–450 °C), trans-membrane pressures (0–2.5 bar) composition have been carried out. Moreover, thermal stability was also checked by repeating permeation after several cycles heating cooling system. Membrane permeances calculated Sieverts' law, obtaining in range 4·10−5–4·10−4 mol m−2 s−1 Pa−0.5. activation energy permeance Arrhenius' equation, value 16.4 kJ/mol. In spite selectivity being 100% for all experiments, permeability affected feed gas. Thus, significant depletion H2 permeate flux observed when other mixture, especially CO, more or less depending on composition.