Selectivity of silica-alumina matrices
Conference
·
· American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States)
OSTI ID:7195352
- W.R. Grace and Co., Columbia, MD (United States)
Commercial fluid cracking catalysts are comprised of faujasite zeolite dispersed in an inorganic mixed oxide matrix. X-ray amorphous silica-aluminas are generally used as matrix components. Cracking of large molecules present in a resid feed is limited by diffusion within a zeolite crystallite. As a result, the amorphous silica-alumina matrix plays a major role in cracking in these feed components. Cracking activity of amorphous silica-alumina is related to its acidity. Acidity and hydrocarbon cracking activity of amorphous silica-alumina catalysts of varying composition and preparation methods have been reported. Hydrothermal pretreatment of cracking catalysts has been employed as a method to simulate aging in a commercial FCC unit. The objective of this work is to determine gas oil cracking activity and selectivity for silica-aluminas of varying composition. Hydrothermal pretreatment of cracking and selectivity for silica-aluminas of varying composition. Hydrothermal pretreatment under varying conditions was employed to generate catalysts of the same composition with varying surface area. NMR and ESCA characterization of the silica-aluminas were employed to elucidate the nature of active site for gas oil cracking and determine catalyst properties that influence selectivity.
- OSTI ID:
- 7195352
- Report Number(s):
- CONF-900802--
- Conference Information:
- Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States) Journal Volume: 35:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMORPHOUS STATE
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
DISTILLATES
ELECTRON SPECTROSCOPY
ENERGY SOURCES
EXPERIMENTAL DATA
FAUJASITE
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
GAS OILS
HEAT TREATMENTS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MAGNETIC RESONANCE
MATERIALS
MICROSTRUCTURE
MINERALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM RESIDUES
PYROLYSIS
RESONANCE
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
ZEOLITES
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMORPHOUS STATE
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
DISTILLATES
ELECTRON SPECTROSCOPY
ENERGY SOURCES
EXPERIMENTAL DATA
FAUJASITE
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
GAS OILS
HEAT TREATMENTS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MAGNETIC RESONANCE
MATERIALS
MICROSTRUCTURE
MINERALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM RESIDUES
PYROLYSIS
RESONANCE
SILICATE MINERALS
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
ZEOLITES