Process for regenerating catalyst from a fluidized catalytic process at high pressure

A process for regenerating catalyst from a fluidized catalytic process comprising:

• providing an oxygen stream and a preheated carbon dioxide recycle stream;
• mixing said oxygen stream and said preheated carbon dioxide recycle stream to provide a carbon dioxide rich oxidation stream;
• separating said carbon dioxide rich oxidation stream into a first portion and a second portion;
• passing the first portion of said carbon dioxide rich oxidation stream to a regenerator unit to provide a carbon dioxide rich flue gas stream;
• passing the second portion of said carbon dioxide rich oxidation stream to heat recovery section to provide a partially cooled carbon dioxide rich flue gas stream and a steam stream;
• reacting one or more of a sulfur-containing compound, a nitrogen-containing compound, or both in said partially cooled carbon dioxide rich flue gas stream with a reactant in a decontamination reactor to form a reactor effluent stream comprising reactant salt;
• filtering the reactor effluent stream to remove the reactant salt and catalyst fines to produce a filtered reactor effluent stream;
• compressing said filtered reactor effluent stream to provide a compressed filtered reactor effluent stream;
• and
• recycling said compressed filtered reactor effluent stream to said regenerator unit.