Low-temperature methane activation under nonoxidative conditions over supported ruthenium-cobalt bimetallic catalysts

L. Guczi, K. V. Sarma, L. Borkó

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Dissociative chemisorption of methane over ruthenium, cobalt, and ruthenium-cobalt bimetallic catalysts supported by alumina, silica, and NaY was investigated under a wide range of temperatures. The extent of hydrogen loss from methane was monitored by deuterium uptake of the surface carbonaceous species (CHx) formed from methane and/or by the amount of hydrogen evolved during the course of methane chemisorption. The presence of a high average number of deuteriums in the desorbing methane suggested a wide spread dissociation of methane. The initial distribution of the deuterated products generally decreased in the sequence CD4 > CHD3 > CH2D2. The amount of chemisorbed methane and the evolution of hydrogen during methane chemisorption increase with temperature and follow the sequence of reducibility of the supported metals and the particle size which, in turn, depends on the support and the alloy formed. CH species prevailed on alumina-and silica-supported catalysts, while on NaY-supported metals, CH2 species are dominant when small metal particles are stabilized inside the supercage.

Original languageEnglish
Pages (from-to)495-502
Number of pages8
JournalJournal of Catalysis
Volume167
Issue number2
Publication statusPublished - 1997

Fingerprint

Ruthenium
Methane
Cobalt
ruthenium
cobalt
methane
Chemical activation
activation
catalysts
Catalysts
Chemisorption
chemisorption
Hydrogen
Temperature
Aluminum Oxide
Metals
Catalyst supports
Silicon Dioxide
hydrogen
Alumina

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Low-temperature methane activation under nonoxidative conditions over supported ruthenium-cobalt bimetallic catalysts. / Guczi, L.; Sarma, K. V.; Borkó, L.

In: Journal of Catalysis, Vol. 167, No. 2, 1997, p. 495-502.

Research output: Contribution to journalArticle

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