Methods and fuel processing apparatuses for upgrading a pyrolysis oil stream and a hydrocarbon stream

A method for upgrading a pyrolysis oil stream and a hydrocarbon stream in a fluid catalytic cracking unit including a reaction zone, the method comprising the steps of:

• separately introducing the pyrolysis oil stream through a pyrolysis oil feed line and the hydrocarbon stream through a hydrocarbon feed line into a reaction zone to form a mixture of the pyrolysis oil stream and the hydrocarbon stream in the reaction zone, wherein the pyrolysis oil feed line includes a pyrolysis oil outlet into the reaction zone and the hydrocarbon feed line includes a hydrocarbon outlet into the reaction zone wherein the pyrolysis oil stream consists essentially of pyrolysis oil up to 35 wt % water;
• catalytically cracking the mixture of the pyrolysis oil stream and the hydrocarbon stream in the presence of a particulate cracking catalyst in the reaction zone;
• actively cooling and maintaining the pyrolysis oil stream at a temperature of less than or equal to about 80° C. in the pyrolysis oil feed line substantially up to the pyrolysis oil outlet into the reaction zone, wherein actively cooling and maintaining the pyrolysis oil stream comprises externally cooling the pyrolysis oil stream in the pyrolysis oil feed line with an external cooling medium that externally cools the pyrolysis oil feed line to thereby inhibit external heating of the pyrolysis oil stream through the pyrolysis oil feed line.