A study about the effect of the temperature of hydrogen treatment on the properties of Ru/Al2O3 and Ru/C and their catalytic behavior during 1-heptyne semi-hydrogenation

The 1-heptyne selective hydrogenation carried out at 150 kPa, and at 283 and 303 K using Ru/Al2O3 and Ru/C as catalysts, was studied. Catalysts were prepared by the incipient wetness impregnation technique using RuCl3 as precursor. Ru/Al2O3 was treated in hydrogen at 373 or 573 K and Ru/C only at th...

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Bibliographic Details
Published in:Catalysis letters 2006-08, Vol.110 (1-2), p.23-28
Main Authors: LEDERHOS, Cecilia R, L'ARGENTIERE, Pablo C, COLOMA-PASCUAL, Fernando, FIGOLI, Nora S
Format: Article
Language:English
Subjects:
Aluminum oxide
Catalysis
Catalysts
Chemisorption
Chemistry
Exact sciences and technology
General and physical chemistry
Hydrogen
Hydrogen storage
Hydrogenation
Moisture content
Organic chemistry
Ruthenium trichloride
Selectivity
Shape effects
Temperature
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The 1-heptyne selective hydrogenation carried out at 150 kPa, and at 283 and 303 K using Ru/Al2O3 and Ru/C as catalysts, was studied. Catalysts were prepared by the incipient wetness impregnation technique using RuCl3 as precursor. Ru/Al2O3 was treated in hydrogen at 373 or 573 K and Ru/C only at the last temperature. Catalysts were characterized by hydrogen chemisorption, TPR and XPS. Ru dispersion after treatment in hydrogen at the highest temperature is similar for both catalysts. Ru is present as Ru0 in Ru/C, while Ru0 and Ru electron-deficient species are present on the catalysts surface after hydrogen treatment at the two temperatures using Al2O3 as support. The best catalytic behavior was observed for the highest temperature of hydrogen treatment and for 303 K reaction temperature. As a consequence of a shape selectivity effect of the C support, the best conversion is obtained with the alumina supported catalyst.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-006-0085-z