Long-Term H2 Characterization of Composite Pd and Pd/Ag Membranes Synthesized from Agitated Electroless Pd and Ag Plating Baths

摘要

Hydrogen separation technologies are of great importance due to the essential nature of H2 as an alternate clean energy carrier and the increasing demand for hydrogen in various chemical and petrochemical industries. Composite Pd and Pd/alloy membranes prepared by the electroless plating on porous sintered metal supports have potential applications for high purity H2 production in steam reforming reactors, as well as in H2 separation and purification. Membrane synthesis via electroless plating is a widely used technique to form uniform deposition on surfaces with complex geometries and large surface areas with the added advantages such as the hardness of the deposited film, good adhesion to the substrate, and simple equipment and ease of scale-up. Although there are only few studies in the literature that discuss the effects of plating parameters on the deposition rates from hydrazine-based plating baths, the effect of external mass transfer on the electroless plating rates of Pd has not been quantified yet.