Surface structure and functionality of bauxite-based catalysts in the hydrotreating of heavy crudes
The functionality of Mo- and W-containing catalysts in the hydrotreating of heavy feedstocks in trickle flow conditions was compared. The catalysts included a bauxite support with an absorbed layer of Mo and/or W prepared by a step addition technique. Alumina-supported catalysts were studied also, and a strict correlation was observed between the properties of the bauxite-based catalysts and those of the corresponding alumina-based systems. The Mo-based systems performed better as catalysts than the W systems. NMR results revealed a deeper insight into the structural modifications induced in the feedstock by catalytic hydroprocessing with these catalysts. The catalysis studies of the feedstocks showed that the removal of the ethero-atoms lowered the aromaticity of the samples and the degree of condensation of the aromatic structures with only a moderate amount of hydrogenation of the aromatic rings. (BLM)
- OSTI ID:
- 6174734
- Report Number(s):
- CONF-820909-Vol.1
- Journal Information:
- Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 27:3; Conference: National meeting of the American Chemical Society, Kansas City, MO, USA, 1 Sep 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
04 OIL SHALES AND TAR SANDS
HYDROGENATION
CATALYSIS
MOLYBDENUM
CATALYTIC EFFECTS
PETROLEUM
TUNGSTEN
ALUMINIUM OXIDES
BAUXITE
CATALYST SUPPORTS
CONDENSED AROMATICS
EXPERIMENTAL DATA
NUCLEAR MAGNETIC RESONANCE
ALUMINIUM COMPOUNDS
ALUMINIUM ORES
AROMATICS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
MAGNETIC RESONANCE
METALS
NUMERICAL DATA
ORES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RESONANCE
TRANSITION ELEMENTS
020400* - Petroleum- Processing
040403 - Oil Shales & Tar Sands- Refining