Catalysis with homogeneous membranes loaded with nanoscale metallic clusters and their preparation |
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Authors: | D. Fritsch K. -V. Peinemann |
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Affiliation: | GKSS Forschungszentrum Geesthacht, P.O. Box 1160, D-21494, Geesthacht, Germany |
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Abstract: | Catalytically powerful, non-porous membranes were manufactured from two highly gas permeable poly(amide imides) consisting of structures with moieties of 3,3'-dimethylnaphthidine and hexafluoroisopropylidene (6F) or hexafluoroisopropylidene 2,2-bis(phthalic acid anhydride) (6FDA) and 6F. The catalysts are pure precious metals or precious metal alloys dispersed on a nanoscale uniformly throughout the membrane. The membranes are characterized by electron microscopy, gas permeability, hydrogen uptake and, as a model reaction, the decomposition of nitrous oxide by hydrogen to nitrogen and water catalyzed by Pd/Ag. The permeance to hydrogen and nitrous oxide is round 2–10-6 cm3 (STP) /cm2·s·cmHg for membranes of 40–50μm in thickness. |
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