Test measures FCC catalyst deactivation by Ni, V
Various factors such as changing crude sources, resid price structures, and shifts in product market demand have made resid conversion to lighter products an economically attractive option for many refiners. But when resid is added to a fluid catalytic cracking unit (FCCU), a refiner is faced with several undesirable side effects/sup 1 -6/ including: Increased coke yields due to increased condensable hydrocarbons in the feed; Increased regenerator temperatures when this added coke is burned off; Increased gaseous product yields particularly hydrogen from the dehydrogenation activity of nickel and vanadium deposited onto the catalyst from feeds; and, Accelerated hydrothermal/deactivation of the cracking catalysts by nickel and vanadium. The deactivation behaviors of nickel and vanadium are significantly different. Nickel causes moderate catalyst deactivation that is not a strong function of deactivation severity or catalyst characteristics. Vanadium causes moderate to severe catalyst deactivation, depending upon catalyst metals level, deactivation severity, and catalyst characteristics. Increasing a catalyst's matrix surface area from low to moderate levels results in a much greater improvement in its resistance to deactivation by vanadium than either reducing its sodium content or increasing its alumina content.
- Research Organization:
- Engelhard Corp., Edison, NJ
- OSTI ID:
- 6767855
- Journal Information:
- Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 82:5; ISSN OIGJA
- Country of Publication:
- United States
- Language:
- English
Similar Records
New FCCU DEMET{reg_sign} process to produce demetallized spent catalyst with high activity and low hydrothermal deactivation rates
Passivate vanadium and sodium on FCC catalyst
Related Subjects
020400* -- Petroleum-- Processing
ACTIVATION ENERGY
ALKALI METALS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COKE
CRACKING
DEACTIVATION
DECOMPOSITION
DEHYDROGENATION
ELEMENTS
ENERGY
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN PRODUCTION
METALS
NICKEL
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
PYROLYSIS
SODIUM
TEMPERATURE GRADIENTS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
VANADIUM
YIELDS