NOVELTY - The carbonaceous feed pyrolysis apparatus (12) comprises hot particle fluidized beds (14), and a positive displacement apparatus for transfer of hot particles between the beds. The fluidized beds contain a combustion zone and a pyrolysis zone. The positive displacement apparatus: is a screw feeder (22) driven by a variable speed drive motor or a constant speed drive motor; and includes a valve unit (20) placed between the combustion and pyrolysis zones so that hot particles flow from the combustion zone or zones to the pyrolysis zones while impeding the flow of gas in an opposite direction.    USE - The carbonaceous feed such as bio-mass pyrolysis apparatus is useful for producing bio-oil (claimed).    ADVANTAGE - The carbonaceous feed pyrolysis apparatus is capable of rapidly and energy-efficiently producing the bio-oil in an environmentally friendly manner with high quality and throughput and reduced power consumption and without the need for an external energy source, and provides the ideal circumstances for continuous regeneration of the pyrolysis catalyst as the catalyst particles.    DETAILED DESCRIPTION - The carbonaceous feed pyrolysis apparatus (12) comprises hot particle fluidized beds (14), and a positive displacement apparatus for transfer of hot particles between the beds. The fluidized beds contain a combustion zone and a pyrolysis zone. The positive displacement apparatus: is a screw feeder (22) driven by a variable speed drive motor or a constant speed drive motor; and includes a valve unit (20) placed between the combustion and pyrolysis zones so that hot particles flow from the combustion zone or zones to the pyrolysis zones while impeding the flow of gas in an opposite direction, a recycle duct for gas produced in the pyrolysis zone to the combustion zone for combustion of heating the hot particles, and a char separator after the pyrolysis fluidized bed, where char is captured. The hot particles in the fluidized beds are sand particles (16) and primarily catalyst particles that are zeolite particles and cracking catalyst particles. A combustion fluidized bed (18) includes fluidized bed nozzles, where the fluidizing gas is injected into the fluidized bed through nozzles at a base portion of the fluidized bed. The pyrolysis fluidized bed has a similar nozzle arrangement for the fluidizing gas. The nozzle arrangement permits removal of the hot particles from the base of the fluidized beds by the positive displacement apparatus with a smaller hold up volume as the hot particles drop past the nozzles for extraction. Air enters downwards or upwards through the nozzles into the fluidized beds. An INDEPENDENT CLAIM is included for a bio-oil production process.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a fluidized bed pyrolysis apparatus.    Pyrolysis apparatus (12)    Pyrolysis fluidized bed (14)    Hot sand (16)    Combustion fluidized bed (18)    Valve unit (20)    Screw feeder. (22)