Abstract: The present disclosure relates to apparatus and processes for pyrolysis of feeds, such as plastic feeds. In at least one embodiment, a process includes introducing a plastic melt including a plastic component into a reactor via a nozzle coupled with the reactor. The process includes introducing a catalyst into the reactor via a first conduit coupling the reactor with a riser or a regenerator. The process includes pyrolyzing the plastic component to form a pyrolysis product. The process includes removing the pyrolysis product from the reactor via a second conduit disposed at a top ½ height of the reactor. The process includes removing the catalyst from the reactor via a third conduit disposed at a bottom ½ height of the reactor, wherein the catalyst removed from the reactor comprises ash.