NOVELTY - The system has a sealable cartridge (100) comprising an evacuation port (174) through which gases e.g. nitrogen, are removed from the cartridge when the cartridge is sealed. A heating plenum (200) receives a portion of the cartridge to heat contents of the cartridge, and comprises a side entrance fluid port (210) to deliver heated fluid i.e. heated air, into the plenum. The fluid port is spaced from a sidewall (204) of the plenum, where the plenum directs the fluid outwardly and into contact with a set of elongated inner receptacles (112) when the cartridge is received within the plenum.    USE - System for recycling waste plastic that is utilized to generate cracked hydrocarbon material used as petroleum fuel, water, chlorine and bromine.    ADVANTAGE - The system provides dynamic, real-time process control, and allows a user to easily process commingled sources of mixed waste plastic that contain trace levels of non-plastic contamination. The system uses a controllable energy system and a vacuum with negative pressure to control a variable such as dwell time within a treatment chamber to completely control a recycling process. The system utilizes specific and controlled heating patterns to melt a plastic feedstock so as to remove gaseous forms of constituent components of the feedstock in phases. The cartridge can allow for rapid heating to a desired temperature, to improve energy efficiency of the system. The feedstock is melted and vaporized quickly as the heating plenum is maintained at high temperature without regard to a precise heating profile, and a vaporized material is removed from the cartridge and subsequently processed so as to separate the constituent components of the feedstock material. The cartridge and the heating plenum can perform rapid heating and vaporization of the plastic feedstock without separating individual constituent components from each other in the phases based on vaporization conditions within the cartridge.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for recycling plastic.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of a cartridge having a plastic feedstock placed in a heating plenum.    Sealable cartridge (100)    Elongated inner receptacles (112)    Evacuation port (174)    Heating plenum (200)    Sidewall of heating plenum (204)    Side entrance fluid port (210)