期刊
CATALYSIS TODAY
卷 364, 期 -, 页码 263-269出版社
ELSEVIER
DOI: 10.1016/j.cattod.2020.04.027
关键词
Catalytic membrane; Palladium nanoparticles; Hydrogenations; Flat sheet membranes; Hollow fiber contactor
资金
- French Ministry of Higher Education and Research
- Centre National de la Recherche Scientifique (CNRS)
- University Toulouse 3 -Paul Sabatier
Polymeric flat-sheet membranes and hollow fibers were prepared via UV photo-initiated polymerization of acrylic acid to efficiently immobilize palladium nanoparticles. The flat sheet membranes were more active than hollow fibers in hydrogenation reactions under mild conditions, achieving high conversions in short reaction times.
Polymeric flat-sheet membranes and hollow fibers were prepared via UV photo-initiated polymerization of acrylic acid at the surface of commercial polyether sulfones (PES) membranes. These polymeric materials permitted to immobilize efficiently palladium nanoparticles (PdNP), which exhibited a mean diameter in the range of 4-6 nm. These materials were synthesized by chemical reduction of Pd(II) precursors in the presence of the corresponding support. We successfully applied the as-prepared catalytic materials in hydrogenation reactions under continuous flow conditions. Flat sheet membranes were more active than hollow fibers due to the flow configuration and defavorable operating conditions. Actually, various functional groups (i.e. C-C, C-C and NO2) were reduced in flow-through configuration, under mild conditions (between 1.4 and 2.2 bar H-2 at 60 degrees C, using 3.2 mol% of Pd loading), archiving high conversions in short reaction times (12-24 s).
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