Thin PdCu membrane for hydrogen purification from in-situ produced methane reforming complex mixtures containing H2S

Sustainable H2 generation via steam reforming of biogas in membrane reactors: H2S effects on membrane performance and catalytic activity

“…According to what stated above, pure Pd membranes suffer a lot the H2S attack, which is responsible for the block of the H2 dissociation sites and, in some case, for the formation of the Pd4S in the membrane bulk, causing with the consequent their the performance loss due to the lower hydrogen permeability of Pd4S than pure Pd, or the membrane failure after long-term exposure [43][44][45][46][47][48]. On the contrary, Pd-Au and Pd-Cu alloyed membranes result to be more H2S resistant than pure Pd ones [52][53][54][55][56]. In particular, the growing interest in Pd-Au alloy membranes has been due to their superior hydrogen permeability performance and higher resistance to H2S poisoning with respect to Pd-Cu membranes [56].…”

CFD Simulation of a Hydrogen-Permeable Membrane Reactor for CO2 Reforming of CH4: The Interplay of the Reaction and Hydrogen Permeation

“…To get pure hydrogen, extra separation and/or purification is needed . Membrane has been well accepted as an effective and feasible material for gas separation, − and many types of membranes have been developed, including a Pd membrane, − zeolite membrane, , and so on. Furthermore, the concept of a catalytic hydrogen-permeable membrane reactor is raised, which integrates the chemical reaction and hydrogen separation in the same physical unit. − The continuous removal of hydrogen could shift the reaction forward to improve the conversion and even excess thermodynamic equilibrium. , …”

Influence of H2S on the hydrogen flux of thin-film PdAgAu membranes

“…Peters et al identified PdAgAu as an alloy with good properties to reduce H 2 S poisoning [13], influencing the dissociation of H 2 S by modification of the potential energy surface [14]. However, very different performance have been reported under exposure of H 2 S [15], which could be related to differences in compositions and operating conditions, incomplete alloying, and differences in membrane thickness and surfaces of the membranes [16].…”