Hydroprocessing conditions affect catalyst shape selection
Diffusion characteristics, pressure drop limitations, catalyst pore size, catalyst loading techniques, and catalytic activity requirements all affect the selection of the catalyst shape used in hydroprocessing of heavy distillates. Haldor Topsoe Inc. has studied the effects of these hydroprocessing conditions on various shapes of its TK-551 nickel-molybdenum hydroprocessing catalysts. The studies were carried out using Arabian Heavy vacuum gas oil (VGO). For hydroprocessing heavy distillates, polylobed catalysts and dense loading techniques have obvious advantages. The higher external surface of polylobed catalysts ensures better accessibility to the inner surface of the catalyst, and dense loading allows more catalytic activity in a given reactor volume. However there are drawbacks. Polylobed catalysts tend to pack less densely thus reducing volume activity. And dense loading results in higher pressure through the bed. The philosophy behind the use of polylobed catalysts is to improve the diffusion characteristics.
- Research Organization:
- Haldor Topsoe Inc., Lyngby
- OSTI ID:
- 6827302
- Journal Information:
- Oil Gas J.; (United States), Vol. 84:49
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
COMPARATIVE EVALUATIONS
GAS OILS
HYDROCRACKING
MOLYBDENUM
CATALYTIC EFFECTS
NICKEL
CHEMICAL FEEDSTOCKS
CHEMICAL REACTORS
DENSITY
DIFFUSION
HYDROGENATION
PETROLEUM DISTILLATES
PRESSURE DROP
SHAPE
VISCOSITY
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PYROLYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
020400* - Petroleum- Processing