Systems and methods for catalytic cracking of naphtha with co-feed of mixed waste plastic oil to produce light olefins

A process for producing light olefins and aromatics, the process comprising:

• providing a waste plastic pyrolysis oil having a first boiling point ranging from about 30 °C to about 250 °C;
• providing a hydrocarbon stream having a second boiling point ranging from about 30 °C to about 250 °C;
• combining the hydrocarbon stream with the waste plastic pyrolysis oil to provide a combined feed stream comprising from about 2 to about 20 wt. % of the waste plastic pyrolysis oil;
• and
• steam cracking the combined feed stream in a fluid catalytic cracking unit comprising a catalytic cracking catalyst with a HZSM-5 zeolite, to yield a hydrocarbon product stream comprising a mixture of gaseous C1-C4 olefins and liquid C5 and C5+ hydrocarbons.

A system for producing light olefins and aromatics, the system comprising:

• at least one guard bed configured to adsorb chlorine components from a waste plastic pyrolysis oil, wherein the waste plastic pyrolysis oil has a first boiling point ranging from about 30 °C to about 250 °C;
• a mixer configured to combine the waste pyrolysis oil with a hydrocarbon stream to provide a combined feed stream, wherein the hydrocarbon stream has a second boiling point ranging from about 30 °C to about 250 °C;
• and
• a catalytic cracking unit configured to crack the combined feed stream with steam to yield a hydrocarbon product stream containing a mixture of gaseous C1-C4 olefins and liquid C5 and C5+hydrocarbons, wherein the catalytic cracking unit comprises a catalyst comprising a HZSM-5 zeolite.