Abstract: A rotary retort system includes a pressurized furnace vessel configured to be operated within a desired elevated pressure range and within a desired elevated temperature range, and a rotary retort positioned within the pressurized furnace vessel and configured to be operated within the substantially the same elevated pressure range as the pressurized furnace vessel. The rotary retort is configured for mixing and advancing a material disposed therein.

Abstract: A process for the pyrolysis of at least one material includes: introducing the material into a pressurized rotary retort system, heating the material in the pressurized rotary retort system within a desired temperature range and within a desired pressure range for a desired period of time; and, advancing the heated and pressurized material from a first end to a second end of the pressurized rotary retort by rotating the pressurized retort about its longitudinal axis; where at least a quantity of the material is converted into one or more end products. Also the system generally includes: a pressurized rotary retort system configured for producing at least one gaseous product from pyrolysis of material, and having a pressurized furnace vessel and a retort positioned within the pressurized furnace vessel; and; a solids reactor system operatively connected to the rotary retort for receiving material from the pressurized rotary retort system.