Fluidized bed combustion process

Patent · Tue Apr 21 04:00:00 EDT 1992

OSTI ID:5191272

Green, G J; Yan, T Y

This patent describes an FCC catalyst regeneration process for regenerating coke and nitrogen containing catalyst in an FCC regenerator with a regeneration gas comprising oxygen to form hot regenerated catalyst and flue gas. It comprises adding the spent FCC catalyst to a dense bed regeneration zone, operating at dense bed regeneration zone, operating at dense bed catalyst regeneration conditions including a superficial gas velocity of from 0.05 to 4 ft/s. with a relatively reducing atmosphere to partially regenerate the catalyst; adding at least a majority of the regeneration gas to a dilute phase combustion zone underneath, and in open communication with, the dense bed zone the dilute phase combustion zone operating at dilute phase catalyst regeneration conditions including a superficial gas velocity of from 15 to 50 ft/s. to complete the regeneration of the catalyst and produce flue gas containing NO{sub x}; discharging the produced flue gas up into the reducing atmosphere of the dense bed combustion zone; withdrawing hot regenerated catalyst from a portion of the lower, dilute phase combustion zone and recycling at least a portion of this catalyst to an FCC reactor; and withdrawing flue gas with a reduced NO{sub x} content from the top of the dense bed.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): A; US 5106799
• Application Number: PPN: US 7-646911
• OSTI ID: 5191272
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
02 PETROLEUM
020400 -- Petroleum-- Processing
020800 -- Petroleum-- Waste Management
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COKE
COMBUSTION
CONTROL
CRACKING
DECOMPOSITION
DENITRIFICATION
ELEMENTS
ENERGY SOURCES
FLUE GAS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
GASEOUS WASTES
MATERIALS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
PYROLYSIS
RECYCLING
THERMOCHEMICAL PROCESSES
WASTES