Removing pollutants from flue gas in nonzeolitic catalytic cracking
Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system. Sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the system by introducing sufficient molecular oxygen into the catalyst regenerator to provide an atmosphere therein having a molecular oxygen concentration of at least 0.1 volume percent. Carbon monoxide in the regenerator flue gas reacts with oxygen in contact with a particulate carbon monoxide combustion promoter physically admixed with the cracking catalyst. Sulfur oxides in the regenerator flue gas react with silica-free alumina included as a discrete phase in the FCC catalyst to form a sulfur-containing solid in the catalyst, and forming hydrogen sulfide in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.
- Assignee:
- Chevron Research Co
- Patent Number(s):
- US 4204945
- OSTI ID:
- 5770153
- Resource Relation:
- Patent File Date: Filed date 10 Jul 1978
- Country of Publication:
- United States
- Language:
- English
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Process for removing pollutants from catalyst regenerator flue gas
Process for removing pollutants from nonzeolitic catalyst regenerator flue gas
Related Subjects
CARBON MONOXIDE
REMOVAL
FLUE GAS
DESULFURIZATION
SULFUR OXIDES
AIR POLLUTION CONTROL
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC CRACKING
HYDROCARBONS
REGENERATION
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
CRACKING
DECOMPOSITION
GASEOUS WASTES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
PYROLYSIS
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
WASTES
020800* - Petroleum- Waste Management