Hydrogen separation using palladium‐based membranes: Assessment ofH₂separation in a catalytic plasma membrane reactor

Abstract

This study describes the fundamentals of hydrogen-separation membranes and H 2 separation modeling through Pd-based membranes. Furthermore, an assessment of hydrogen separation through a Pd-Cu 40% membrane was performed using two different feed gas concentrations (99.999% H 2 and 75% H 2 À25% N 2 ) and a dielectric barrier discharge (DBD) plasma in a cylindrical type reactor (CTR). The plasma was applied by combining zeolite catalyst materials (SA-600A and 330-HUDIA) in two different hydrogen concentration experiments. Scanning electron microscopy indicated that the SA-600A zeolite exhibited a larger surface area than the 330-HUDIA zeolite. This may have increased the ability of the former material to diffuse hydrogen molecules. The hydrogen separation results showed that N 2 gas has a positive effect on separation through a Pd-Cu membrane. The most interesting result from the plasmacatalyst experiment was that the CTR H 2 permeation rate reached a maximum of 100% at most input gas flow rates. The maximum plasma-catalyst energy efficiencies at feed gas concentrations of 99.999% and 75% H 2 -25% N 2 were 81% and 54%, respectively. The hydrogen permeability results from the SA-600A zeolite were better than those produced using 330-HUDIA at a H 2 input flow rate of 5 L/min.

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“…This represents 6% of the total cumulative emission reductions. The development of hydrogen energy is due to the use of new nanostructured materials, for example, metal-organic frameworks, nanoparticles, carbon structures, and others [ 1 , 2 , 3 , 4 ]. Hydrogen fuel cells are clean conversion energy devices for a variety of applications, such as stationary energy sources, vehicles, and even portable devices [ 5 , 6 , 7 ].…”

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“…The membranes of this category are generally composed of an active layer that is placed onto a support that has a porous nature. [21][22][23] The thickness of the membrane plays an important role in resisting mass transfer; hence, the permeation rate can be increased by decreasing the total thickness. Two parameters are also related to the performance of a membrane, namely, the rate of permeability and selectivity.…”