Luminescence probes of vanadium-contaminated fluid cracking catalysts

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90298-4· OSTI ID:7160181

Anderson, M W; Suib, S L ^[1]; Occelli, M L ^[2]

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1. Univ. of Connecticut, Storrs (USA)
2. UNOCAL Corporation, Brea, CA (USA)

Vanadium deactivation and tin passivation of vanadium impurities in a model fluid cracking catalyst system consisting of an europium-exchanged Y zeolite and an amorphous aluminosilicate gel have been studied by luminescence techniques. Vanadium is found to be preferentially adsorbed by the gel and does not migrate after deposition and calcination but does migrate between the zeolite and the matrix during steaming. After heating in air at 575C, vanadium is in the form of VO{sup 2+} cations on the zeolite and primarily in the form of V{sub 2}O{sub 5} on the gel. The environment of Eu{sup 3+} cations is found to be very sensitive to heat treatment but not to the order of tin and vanadium deposition. Upon steaming, EuVO{sub 4} is formed on the zeolite and this formation is promoted by the presence of excess Sn.

• OSTI ID: 7160181
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 118:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CALCINATION
CATALYSIS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
CONTAMINATION
CRACKING
DEACTIVATION
DECOMPOSITION
DISPERSIONS
ELEMENTS
ENERGY SOURCES
EUROPIUM
FOSSIL FUELS
FUELS
GELS
HEAT TREATMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LUMINESCENCE
MATERIALS
METALS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
POISONING
PYROLYSIS
RARE EARTHS
SILICATES
SILICON COMPOUNDS
SORPTION
STEAM
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TIN
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM
VANADIUM COMPOUNDS
VANADIUM OXIDES
ZEOLITES