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Thin composite palladium and palladium/alloy membranes for hydrogen separation
Yi Hua Ma1, Ivan P Mardilovich, Erik E Engwall
1Center for Inorganic Membrane Studies, Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, USA.
Annals of the New York Academy of Sciences
|June 5, 2003
Summary
This study reviews palladium (Pd) and Pd/alloy membranes for hydrogen applications. Pd/Cu membranes on stainless steel show good thermal stability and hydrogen flux, with the support influencing Pd layer topology.
Area of Science:
- Materials Science and Engineering
- Chemical Engineering
- Nanotechnology
Background:
- Dense composite membranes, particularly palladium (Pd) and Pd/alloy types, are crucial for hydrogen separation and purification.
- Extensive research is ongoing to optimize their synthesis, characterization, and performance for industrial applications.
Purpose of the Study:
- To review the synthesis and characterization of dense composite Pd and Pd/alloy membranes.
- To highlight experimental findings on Pd/Cu membranes supported on porous stainless steel.
Main Methods:
- Review of existing literature on Pd and Pd/alloy membrane synthesis and characterization.
- Analysis of experimental results for Pd/Cu membranes fabricated on porous stainless steel supports.
- Optical microscopy to examine the morphology and structure of the palladium layer.
Main Results:
- Pd/Cu membranes supported on porous stainless steel demonstrated excellent thermal stability.
- These membranes exhibited a reasonable hydrogen flux, indicating potential for efficient separation.
- Optical micrographs revealed that the dense palladium layer formation was independent of the support's topological features, though the support surface influenced the Pd layer's topology.
Conclusions:
- Dense composite Pd/alloy membranes, specifically Pd/Cu on stainless steel, offer promising properties for hydrogen technologies.
- The findings support the viability of these membranes, with further research potentially optimizing the support-layer interaction for enhanced performance.