IR study of adsorbed piperidine dehydrogenation on oxidic or sulfided Ni?W/Al2O3 catalysts |
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| Authors: | D Ouafi F Maugé J C Duchet and J C Lavalley |
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| Institution: | (1) Laboratoire de Spectrochimie, U.A. CNRS 414, ISMRa-Université de Caen, 14032 Caen Cedex, France |
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| Abstract: | IR spectroscopy has been used to follow the transformation at different temperatures of piperidine chemisorbed on oxidic or sulfided Ni–W/Al2O3 catalysts. Formation of an intermediate species, possibly tetrahydropyridine, and pyridine is evidenced. Their formation temperature on the sulfided samples accounts for the catalyst activity in pyridine hydrogenation under H2 pressure.
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This work was supported by the  Groupement scientifique Hydrotraitement catalytique (CNRS-IFP, TOTAL. ELF). |
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