Palladium-nanoparticle intercalated vermiculite for selective hydrogenation of alpha,eta-unsaturated aldehydes

Palladium nanoparticles were generated in the interlamellar region of swelling 2:1 type vermiculite clay using an adsorption excess isotherm. An adsorption excess isotherm was constructed for vermiculite after exchanging the exchangeable Na+ ions in the interlamellar region using a binary liquid mix...

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Veröffentlicht in:Journal of chemical technology and biotechnology (1986) 2007-03, Vol.82 (3), p.253-258
Hauptverfasser: Divakar, Duraiswami, Manikandan, Dhanagopal, Rupa, Valentine, Preethi, Esther Leena, Chandrasekar, Revathi, Sivakumar, Thiripuranthagan
Format: Artikel
Sprache:eng
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Zusammenfassung:Palladium nanoparticles were generated in the interlamellar region of swelling 2:1 type vermiculite clay using an adsorption excess isotherm. An adsorption excess isotherm was constructed for vermiculite after exchanging the exchangeable Na+ ions in the interlamellar region using a binary liquid mixture (ethanol:toluene). Based on adsorption excess isotherm, 1% w/w palladium was intercalated into the interlamellar space of vermiculite. The Pd-intercalated vermiculite was characterized by X-ray diffraction, transmission electron microscopy and atomic absorption spectroscopy. The 1% w/w Pd-intercalated vermiculite was tested for its catalytic activity towards selective hydrogenation reactions involving some ,-unsaturated carbonyl compounds using a pulse reactor and its catalytic activity was compared with commercial 1% Pd/C. The intercalated catalyst was found to be very selective towards the desired product of unsaturated alcohols.
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.1661