Selective oxidation using encapsulated catalytic metal

A method for reducing CO concentrations in regenerator flue gas from a fluid catalytic cracking process, comprising:

• exposing a feedstock to fluid catalytic cracking conditions in a reactor in the presence of a cracking catalyst and a small pore zeolite-encapsulated metal catalyst to produce one or more cracked products and spent cracking catalyst, comprising 0.01 wt % to 10 wt % of Ru, Rh, Pd, Os, Ir, Pt, Ni, Au, Ag, or combination thereof as a catalytic metal, at least 20 wt % of the catalytic metal being encapsulated in the zeolite;
• passing a catalyst mixture comprising spent cracking catalyst and at least a portion of the small pore zeolite-encapsulated metal catalyst into a regenerator;
• exposing the catalyst mixture to oxidizing conditions to form a regenerated catalyst mixture comprising regenerated cracking catalyst and the at least a portion of the small pore zeolite-encapsulated metal catalyst, the oxidizing conditions resulting in production of CO;
• oxidizing at least a portion of the CO in the presence of the at least a portion of the small pore zeolite-encapsulated metal catalyst to form CO2;
• and
• returning at least a portion of the regenerated catalyst mixture to the reactor,
• wherein the catalyst mixture comprises 0.001 wt % to 10 wt % of the small pore zeolite-encapsulated metal catalyst, or a combination thereof.

A system for performing fluid catalytic cracking, comprising:

• a fluid catalytic cracking reactor, the fluid catalytic cracking reactor comprising a riser and a stripper, the stripper comprising a stripper catalyst outlet and a cracked product outlet, the riser comprising a riser catalyst inlet;
• and
• a regenerator comprising a regenerator catalyst inlet, a regenerator catalyst outlet, an oxidizing gas inlet, and a flue gas outlet, the stripper catalyst outlet being in fluid communication with the regenerator catalyst inlet, the regenerator catalyst outlet being in fluid communication with the riser catalyst inlet, and
• a catalyst mixture within at least one of the fluid catalytic cracking reactor and the regenerator, the catalyst mixture comprising a cracking catalyst and 0.001 wt % to 1.0 wt % of a small pore zeolite-encapsulated metal catalyst, the small pore zeolite-encapsulated metal catalyst comprising 0.01 wt % to 10 wt % of Ru, Rh, Pd, Os, Ir, Pt, Ni, Ag, Au, or a combination thereof as an encapsulated metal.