The effect of chlorine modification of silica-supported Ru on its CO hydrogenation properties

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(90)90152-A· OSTI ID:6223899

Iyagba, E T; Hoost, T E; Nwalor, J U; Goodwin, Jr, J G ^[1]

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1. Univ. of Pittsburgh, PA (USA)

An investigation of CO hydrogenation on Cl-modified supported Ru catalysts has been carried out using both steady-state Fischer-Tropsch synthesis and steady-state isotopic transient kinetic analysis of methanation. The steady-state reaction results illustrate how the presence of chlorine acts to decrease catalytic activity and to enhance the selectivity of methane formation even though it is present on the catalyst only during the initial stages of the reaction. The deactivation results for F-T as well as the isotopic transient results suggest that structural rearrangements induced by the presence of chlorine, rather than selective site blocking or electronic interactions, may be the primary mechanism of chlorine modification of the catalytic properties of supported ruthenium for CO hydrogenation. Isotopic transients indicated that the decrease in methanation activity with increasing initial Cl concentration was a function of a decrease in the number of reactive surface intermediates (or sites) and not of a change in site activity. 56 refs.

• OSTI ID: 6223899
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 123:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINE
DEACTIVATION
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HALOGENS
HYDROCARBONS
HYDROGENATION
KINETICS
METALS
METHANATION
METHANE
MORPHOLOGICAL CHANGES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION INTERMEDIATES
REACTION KINETICS
RUTHENIUM
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENTS