FCC processing with reduced CO2 emissions

A method for operating a fluid catalytic cracking reaction system, comprising:

• exposing a hydrocarbonaceous feed to a catalyst in a reactor under fluid catalytic cracking conditions comprising 20 wt % or more conversion of compounds in the hydrocarbonaceous feed with boiling points greater than 221° C. to compounds with boiling points of 221° C. or less to form one or more liquid products and coke associated with the catalyst, the hydrocarbonaceous feed comprising a T10 distillation point of 316° C. or more, a ratio of aliphatic sulfur to total sulfur of 0.15 or more, and a naphthenes to aromatics ratio of 1.0 or more;
• passing at least a portion of the catalyst and the associated coke into a regenerator;
• passing a supplemental fuel into the regenerator, a vessel associated with the regenerator, or a combination thereof, a ratio of an adjusted weight of the supplemental fuel to a weight of the associated coke being 0.01 or more;
• combusting, in the regenerator, the vessel associated with the regenerator, or the combination thereof, at least a portion of the associated coke and at least a portion of the supplemental fuel to form at least heated catalyst and CO2;
• and
• passing at least a portion of the heated catalyst into the reactor.

A method for operating a fluid catalytic cracking reaction system, comprising:

• exposing a hydrocarbonaceous feed to a catalyst in a reactor under fluid catalytic cracking conditions comprising 20 wt % or more conversion of compounds in the hydrocarbonaceous feed with boiling points greater than 221° C. to compounds with boiling points of 221° C. or less to form one or more liquid products and coke associated with the catalyst, the hydrocarbonaceous feed comprising 25 wt % or less of a bio-derived fraction;
• passing at least a portion of the catalyst and the associated coke into a regenerator;
• passing a supplemental fuel into the regenerator, a vessel associated with the regenerator, or a combination thereof, a ratio of an adjusted weight of the supplemental fuel to a weight of the associated coke being 0.01 or more;
• combusting, in the regenerator, the vessel associated with the regenerator, or the combination thereof, at least a portion of the associated coke and at least a portion of the supplemental fuel to form at least heated catalyst and CO2;
• and
• passing at least a portion of the heated catalyst into the reactor.