Process for separating a carbon dioxide product stream from a flue gas stream

A process for separating a carbon dioxide product stream from a flue gas stream comprising:

• passing a stream of carbon dioxide and oxygen to a regenerator to regenerate a catalyst stream and produce a flue gas stream comprising carbon oxides, sulfur oxides, and/or nitrogen oxides, catalyst fines, oxygen, and water;
• transferring heat from said flue gas stream to a water stream in a heat recovery unit to form a steam stream;
• removing at least one of the sulfur oxides, nitrogen oxides, and catalyst fines from said flue gas stream in a decontamination unit to form a reactor effluent flue gas stream;
• transferring heat from said reactor effluent flue gas stream to provide a cooled flue gas stream;
• removing water from said cooled flue gas stream in a separator to provide a partially dehydrated flue gas stream;
• taking a carbon dioxide recycle stream from said partially dehydrated flue gas stream;
• and
• removing water from said partially dehydrated flue gas stream to provide a dehydrated flue gas stream;
• and
• separating said dehydrated flue gas stream into an oxygen rich stream and a carbon dioxide product stream.

A process for separating a carbon dioxide product stream from a flue gas stream comprising:

• passing a stream of carbon dioxide and oxygen to a regenerator to regenerate a catalyst stream and produce a flue gas stream comprising carbon oxides, sulfur oxides, and/or nitrogen oxides, catalyst fines, oxygen, and water;
• transferring heat from said flue gas stream to a water stream in a heat recovery unit to form a steam stream;
• removing at least one of the sulfur oxides, nitrogen oxides, and catalyst fines from said flue gas stream in a decontamination unit;
• removing water from said flue gas stream in a dehydration unit;
• separating said flue gas stream into an oxygen rich stream and a carbon dioxide product stream in a cryogenic fractionation column;
• passing said oxygen rich stream to a pressure swing absorption (PSA) unit;
• separating said oxygen rich stream into a purified oxygen stream and a PSA tail gas stream;
• and
• recycling said PSA tail gas stream to the cryogenic fractionation column.