Characterization and reactivity of Nb 2O 5 supported Ru catalysts

A series of Ru/Nb 2O 5 catalysts with Ru loadings from 0.5–7.18 wt.% were prepared and characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), temperature programmed desorption (TPD) of hydrogen and CO chemisorption measurements. XRD patterns reveal the presence of RuO 2 fr...

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Bibliographic Details
Published inCatalysis communications Vol. 10; no. 5; pp. 459 - 463
Main Authors Chary, Komandur V.R., Srikanth, Chakravartula S., Venkat Rao, Vattikonda
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2009
Subjects
1,2,4-Trichlorobenzene
Dispersion
Hydrodechlorination
Niobium oxide
Ruthenium
1,2,4-Trichlorobenzene
Ruthenium
Niobium oxide
Hydrodechlorination
Dispersion
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Summary:A series of Ru/Nb 2O 5 catalysts with Ru loadings from 0.5–7.18 wt.% were prepared and characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), temperature programmed desorption (TPD) of hydrogen and CO chemisorption measurements. XRD patterns reveal the presence of RuO 2 from 3.0 wt.% Ru loading. TPR profiles show only one peak due to reduction of RuO 2 to Ru 0. The H 2-TPD exhibits two peaks, one due to desorption of hydrogen from Ru metal and another due to spill over from metal to the support. The catalytic properties were evaluated for the vapor-phase hydrodechlorination of 1,2,4-trichlorobenzene and related to Ru dispersion.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2008.10.006