Gasification of torrefied textiles and fossil fuels

A method for making one or more olefins, said method comprising:

• (a) cracking a cracker stream in a cracking furnace to provide a first olefin-containing effluent exiting the cracking furnace at a first coil outlet temperature (COT1);
• (b) subsequent to step (a), adding a stream comprising a recycle content pyrolysis oil composition (r-pyoil) to said cracker stream to form a combined cracker stream;
• and
• (c) cracking said combined cracker stream in said cracking unit to provide a second olefin-containing effluent exiting the cracking furnace at a second coil outlet temperature (COT2),
• wherein, when said r-pyoil is heavier than said cracker stream, COT2 is equal to or less than COT1,
• wherein, when said r-pyoil is lighter than said cracker stream, COT2 is greater than or equal to COT1.

A method for making one or more olefins, comprising:

• (a) cracking a cracker stream in a cracking furnace at a first hydrocarbon mass flow rate (MF1);
• (b) subsequent to step (a), adding r-pyoil to said cracker stream to form a combined cracker stream having a second hydrocarbon mass flow rate (MF2) that is higher than MF1;
• and
• (c) cracking said combined cracker stream at MF2 in said cracking unit to obtain an olefin-containing effluent comprising ethylene and propylene, said olefin-containing effluent having a combined output of ethylene and propylene that same as or higher than the output of ethylene and propylene obtained by cracking said cracker stream at MF1.