Determination of ruthenium surface areas by hydrogen and oxygen chemisorption

Taylor, Kathleen C.

doi:10.1016/0021-9517(75)90091-3

Cited by 119 publications

(21 citation statements)

References 7 publications

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“…The dispersion of ruthenium in the catalyst, D, defined as the fraction of ruthenium at the surface, D = Ru s / Ru total , was calculated assuming the stoichiometry of H 2 adsorption: Ru s O + 1.5H 2 ? Ru s H + H 2 O [20]. This stoichiometry has also been found for supported Pt and Pd catalysts [21].…”

Section: Methodsmentioning

confidence: 51%

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Hydrogenolysis of Glycerol to Propanediol Over Ru: Polyoxometalate Bifunctional Catalyst

2007

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Ruthenium-doped (5 wt%) acidic heteropoly salt Cs 2.5 H 0.5 [PW 12 O 40 ] (CsPW) is an active bifunctional catalyst for the one-pot hydrogenolysis of glycerol to 1,2-propanediol (1,2-PDO) in liquid phase, providing 96% selectivity to 1,2-PDO at 21% glycerol conversion at 150°C and an unprecedented low hydrogen pressure of 5 bar. Rhodium catalyst, 5%Rh/CsPW, although less active, shows considerable selectivity to 1,3-PDO (7.1%), with 1,2-PDO being the main product (65%).

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Section: Methodsmentioning

confidence: 51%

“…This stoichiometry has also been found for supported Pt and Pd catalysts [21]. The average size of Ru particles, d, was obtained from the empirical equation d (nm) = 0.9/D [20]. The same procedure was used for measuring Rh dispersion in 5%Rh/CsPW.…”

Section: Methodsmentioning

confidence: 99%

Hydrogenolysis of Glycerol to Propanediol Over Ru: Polyoxometalate Bifunctional Catalyst

2007

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“…Ruthenium dispersion was measured by hydrogen chemisorption in a Micromeritics Accusorb 2100e equipment at 373 K following the method proposed by Taylor [14]. A H:Ru atomic ratio 1 was used for calculations.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

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

et al. 2006

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The 1-heptyne selective hydrogenation carried out at 150 kPa, and at 283 and 303 K using Ru/Al 2 O 3 and Ru/C as catalysts, was studied. Catalysts were prepared by the incipient wetness impregnation technique using RuCl 3 as precursor. Ru/Al 2 O 3 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 Ru 0 in Ru/C, while Ru 0 and Ru electron-deficient species are present on the catalysts surface after hydrogen treatment at the two temperatures using Al 2 O 3 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.

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“…Ruthenium dispersion was measured by hydrogen chemisorption in a Micromeritics Accusorb 2100e equipment at 373 k following the method proposed by Taylor [12]. A H:Ru atomic ratio 1 was used for calculations.…”

Section: Catalysts Characterizationmentioning

confidence: 99%

Effect of the support on the selective hydrogenation of benzeneover ruthenium catalysts. 1. Al2O3 and SiO2

et al. 2005

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The effect of the support on the liquid phase selective hydrogenation of benzene to cyclohexene over Ru catalysts was studied. Catalysts were prepared using RuCl 3 as precursor and characterized by hydrogen chemisorption, XPS and TPR. The reaction was carried out at 373 K and 2 MPa using a stirred tank reactor. It was found that the catalytic activity is not influenced by the Ru dispersion. More electron-deficient Ru species are present on Al 2 O 3 than on SiO 2 . The electronic state of Ru affects the selectivity to cyclohexene.

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Determination of ruthenium surface areas by hydrogen and oxygen chemisorption

Cited by 119 publications

References 7 publications

Hydrogenolysis of Glycerol to Propanediol Over Ru: Polyoxometalate Bifunctional Catalyst

Hydrogenolysis of Glycerol to Propanediol Over Ru: Polyoxometalate Bifunctional Catalyst

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

Effect of the support on the selective hydrogenation of benzeneover ruthenium catalysts. 1. Al2O3 and SiO2

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