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Proceedings Paper

Nanoscaled palladium catalysts on activated carbon support
Author(s): I. Simakova; A. Koskin; I. Deliy; A. Simakov
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Paper Abstract

The application of nanosized palladium catalysts has gained growing importance over the last few years. Palladiumbased catalytic methods for fine organic synthesis permits the replacement of traditional labor-consuming techniques in multi-step organic syntheses and provides an improvement from the standpoint of cost and environmental impact. The use of activated carbon "Sibunit" as a substrate for catalysts has been fostered by the substrate's high surface area, chemical inertness both in acidic and basic media, and at the same time by the absence of very strong acidic centers on its surface which could promote undesirable side reactions during the catalytic run. A conversion of alpha-pinene derivatives to commercial biologically active compounds and fragrances as well as sun screens with ultra violet filtering properties, involves a catalytic hydrogenation as a key intermediate step. The aim of the present work is to clarify the factors favoring the dispersion of Pd metal on carbon. The effect of reduction temperature and pretreatment of the carbon surface on metal size during preparation of Pd on "Sibunit" catalysts for selective verbenol conversion was studied. The electron microscopy method (TEM) was used to show the influence on Pd metal dispersion of carbon surface oxidation by the oxidant H2O2, HNO3. The catalytic activity of Pd/C catalyst samples in verbenol hydrogenation reaction was determined. Kinetic peculiarities of verbenol hydrogenation over the most active catalyst sample were obtained.

Paper Details

Date Published: 20 September 2005
PDF: 7 pages
Proc. SPIE 5924, Complex Mediums VI: Light and Complexity, 592413 (20 September 2005); doi: 10.1117/12.616317
Show Author Affiliations
I. Simakova, Boreskov Institute of Catalysis (Russia)
A. Koskin, Boreskov Institute of Catalysis (Russia)
I. Deliy, Boreskov Institute of Catalysis (Russia)
A. Simakov, CCMC, Univ. Nacional Autonoma de Mexico (Mexico)


Published in SPIE Proceedings Vol. 5924:
Complex Mediums VI: Light and Complexity
Martin W. McCall; Graeme Dewar; Mikhail A. Noginov, Editor(s)

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