Fabrication of Palladium Membranes Supported on a Silicalite‐1 Zeolite‐Modified Alumina Tube for Hydrogen Separation |
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| Authors: | Yu Guo Hongmei Wu Lidai Zhou Zhenbin Zhang Haiou Liu Xiongfu Zhang |
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| Affiliation: | 1. Liaoning University of Technology, School of Chemical and Environmental Engineering, Jinzhou, China.;2. Dalian University of Technology, School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian, China. |
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| Abstract: | Thin palladium membranes were fabricated on macroporous α‐Al2O3 tubes by electroless plating. The silicalite‐1 (Sil‐1) zeolite serving as intermediate and diffusion barrier layer was introduced to modify the surface roughness and pore size of the porous substrate and prevent the atomic interdiffusions of the metal elements between Pd layer and the support. The Pd composite membranes were studied by scanning electron microscopy (SEM), X‐ray diffraction (XRD), and electron probe microanalysis (EPMA), revealing that morphology and structure of the Sil‐1 layer significantly influence the Pd membrane preparation. Single‐gas permeation tests were carried out with gas H2 and N2 to determine the permeation performance of the membranes. The resulting membrane exhibited long‐term stability under hydrogen permeation. |
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| Keywords: | Electroless plating Hydrogen separation Palladium membrane Silicalite‐1 zeolite |
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