Pressure effect in ethanol steam reforming via dense Pd-based membranes

Optimal Pt load of a Pt/La 2 O 3 ·SiO 2 highly selective WGS catalyst used in a Pd-membrane reactor

“…These values were then fitted using an Arrhenius-type equation with a correlation factor R 2 = 0.981, P • E of 3.39 × 10 −8 mol s −1 m −1 Pa −0.5 and E A of 5154 J mol −1 . The permeability and E A values are in agreement with those reported in the literature for similar Pd-Ag membranes [33,43].…”

An Innovative Procedure to Evaluate the Hydrogen Diffusion Coefficient in Metals from Absorption Measurements

“…All these techniques require dedicated set-ups and non-trivial procedures [18]. Quite recently, a series of non-ideal behaviours were considered and reformulations of the Fick's law were suggested and applied to experimental data [19][20][21]. Moreover, some first principle calculations were performed in order to calculate the diffusion coefficient in a large variety of metals [22].…”

Study of the performance of Rh/La2O3–SiO2 and Rh/CeO2 catalysts for SR of ethanol in a conventional fixed-bed reactor and a membrane reactor

“…The results obtained with a H 2 O/Ethanol molar ratio of 10 suggest that part of the water excess dilutes the hydrogen produced in the reaction zone resulting in a lower hydrogen partial pressure difference between both sides of the membrane. Tosti et al [20] reported that an excess of a limiting reagent increases the reaction conversion in a traditional reactor. However, in a membrane reactor such an excess reduces the partial pressure of the permeating species (hydrogen) and as a consequence, the shift effect of the membrane is depressed.…”