Luminescence as a probe of passivated model fluid cracking catalysts

Conference · Wed Aug 01 04:00:00 EDT 1990 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (United States)

OSTI ID:7195341

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

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1. Univ. of Connecticut, Storrs (United States)
2. UNOCAL Corp., Brea, CA (United States)

Luminescence methods have been used to probe the nature of naphthenate, phthalocyanine and porphyrin complexes of both vanadium and nickel in fluid cracking catalysts. These complexes are poison precursors for the zeolite component of the catalyst. Nickel can be passivated with antimony whereas vanadium can be passivated with tin. The goals of this research are to probe the metal poison during deposition, calcination and steam treatment. Concentrations of 0.5 to 1.0 weight % poison and passivator have been used. Luminescence data suggest that the nature of the precursor determines at what stage the zeolite is reacted with vanadia. The final steaming step causes the oxidation of vanadyl ions to vanadia for all precursors.

• OSTI ID: 7195341
• 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

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ANTIMONY
CARBOXYLIC ACIDS
CATALYSTS
CATALYTIC CRACKING
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPLEXES
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LUMINESCENCE
MATERIALS
METALS
MINERALS
NICKEL COMPLEXES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PASSIVATION
PETROLEUM
POISONING
PORPHYRINS
PRECURSOR
PYROLYSIS
SILICATE MINERALS
STEAM
THERMOCHEMICAL PROCESSES
TIN
TRANSITION ELEMENT COMPLEXES
VANADIUM COMPLEXES
ZEOLITES