Extended x-ray absorption fine structure spectroscopic (EXAFS) studies of model reforming catalysts

Conference · Sat Aug 01 04:00:00 EDT 1987 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5335870

Meitzner, G; Via, G H; Sinfelt, J H; Lytle, F W ^[1]

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1. Exxon Research and Engineering Company, Annandale, NJ (USA)

Catalysts containing rhenium and platinum, developed by workers at Chevron, are among those used in reforming reactions for synthesis of aromatic hydrocarbons used in gasoline. The state of reduction of rhenium and the extent of the interaction between rhenium and platinum have been the subject of discussion. We have made a study with extended X-ray absorption fine-structure spectroscopy (EXAFS) of an alumina-supported rhenium-platinum bimetallic catalyst to address these issues. We have also examined a sulfided catalyst. The analyses of EXA FS from the rhenium-platinum catalyst was complicated by the similarity of the electron back-scattering properties and poor separation of the absorption edges of the two metals (because their atomic numbers are close together). Therefore we included in this work a sample that contained rhenium and palladium supported on alumina. Rhenium and palladium are easily discriminated with EXAFS, and we assumed that some of the same structural features may be present.

• OSTI ID: 5335870
• Report Number(s): CONF-8708312--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 32:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ABSORPTION SPECTROSCOPY
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHEMICAL REACTIONS
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FINE STRUCTURE
INFORMATION
IONIZING RADIATIONS
METALS
NUMERICAL DATA
PALLADIUM
PLATINUM
PLATINUM METALS
RADIATIONS
REFORMER PROCESSES
RHENIUM
SPECTROSCOPY
TRANSITION ELEMENTS
X RADIATION