Ethane hydrogenolysis over well-defined Ru-Cu/SiO sub 2 catalysts

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90173-5· OSTI ID:6842398

Smale, M W; King, T S ^[1]

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1. Iowa State Univ., Ames (USA)

This work was undertaken to investigate the behavior of the ethane hydrogenolysis reaction over well-characterized, chlorine-free, silica-supported ruthenium-copper catalysts. The total dispersion of all catalysts was about 29%. The reaction studies were carried out in a laboratory-scale reactor, and catalyst activity was correlated with ruthenium surface composition, as measured previously by suing nuclear magnetic resonance spectroscopy of chemisorbed hydrogen. Monte Carlo simulations of the catalyst were used to assist in the interpretation of the results. The reaction studies indicate that catalysts with a Cu:Ru atom ratio greater than 1:9 have a constant specific activity (rate per surface ruthenium atom), analogous to the behavior of single crystal surfaces. Below this Cu:Ru ratio, the specific activity drops rapidly as copper is added to the system at the lower temperatures studied. At a Cu:Ru ratio of 1:9 the modeling suggest that all edge and corner sites of the catalyst crystallite are occupied by copper. The authors conclude that the ethane hydrogenolysis reaction over silica-supported ruthenium-copper catalysts is sensitive to the crystallite structure but no geometric effects are observed. 28 refs.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6842398
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 119:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKANES
CATALYSIS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
COPPER
CRYSTAL STRUCTURE
DEHYDROGENATION
ELEMENTS
ETHANE
HYDROCARBONS
HYDROGEN
KINETICS
MAGNETIC RESONANCE
MATHEMATICAL MODELS
METALS
MINERALS
MONTE CARLO METHOD
NONMETALS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
QUANTITY RATIO
REACTION KINETICS
RESONANCE
RUTHENIUM
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS