Catalytic functionalities of supported sulfides. II. Effect of support on Mo dispersion
Conference
·
· Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
OSTI ID:6280729
Certain Mo and CoMo catalysts supported on a series of SiO/sub 2/-Al/sub 2/O/sub 3/ supports have been characterized by x-ray diffraction and ESCA techniques. The catalysts showed a decline in hydrodesulfurization (HDS) and hydrogenation (HYD) activity with increasing SiO/sub 2/ content in the support. For the Mo/SiO/sub 2/-Al/sub 2/O/sub 3/ series, results indicated a high degree of dispersion of Mo on catalysts containing a high proportion of Al/sub 2/O/sub 3/; however, ESCA results showed low dispersion of Mo for the SiO/sub 2/-supported catalysts indicating three-dimensional crystallites. Similar ESCA results were obtained for the CoMo catalysts. There is some reason to believe that two phases may also be present in the Mo/SiO/sub 2/ catalyst and that the calculated crystallite size is an average if large and small crystals with x-ray diffraction detecting only the larger ones. Some discussion is presented of the mechanism of the reactions at active sites on the catalysts. (BLM)
- Research Organization:
- Univ. of Utah, Salt Lake City
- OSTI ID:
- 6280729
- Report Number(s):
- CONF-820909-Vol.1
- Conference Information:
- Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 27:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040403 -- Oil Shales & Tar Sands-- Refining
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT
COHERENT SCATTERING
CRYSTAL STRUCTURE
DATA
DESULFURIZATION
DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
EXPERIMENTAL DATA
HYDROGENATION
INFORMATION
METALS
MINERALS
MOLYBDENUM
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
TRANSITION ELEMENTS
X-RAY DIFFRACTION
020400* -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040403 -- Oil Shales & Tar Sands-- Refining
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT
COHERENT SCATTERING
CRYSTAL STRUCTURE
DATA
DESULFURIZATION
DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
EXPERIMENTAL DATA
HYDROGENATION
INFORMATION
METALS
MINERALS
MOLYBDENUM
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
TRANSITION ELEMENTS
X-RAY DIFFRACTION