NOVELTY - The method involves contacting a carbonaceous feedstock (20) with heated inorganic heat carrier particles (18) at reaction conditions to pyrolyze the carbonaceous feedstock to form a product stream (26) comprising pygas, pyrolysis oil, and solids (32) that include char and cooled inorganic heat carrier particles, where the reaction conditions include reactor pressure of about 70 kilo pascal gauge. The solids are separated from the product stream at separation pressure of about 70 kilo pascal gauge. An oxygen-containing gas and solids are combined at combustion conditions.    USE - Method for facilitating a rapid thermal processing of carbonaceous material using higher operating pressures.    ADVANTAGE - The method enables enhancing the rapid thermal processing that can adequately support higher carbonaceous feedstock rates without increasing cost and complexity of shipping, installing and operating the rapid thermal process arrangement. The method ensures that carrier gas does not contain oxygen present, thus minimizing or preventing oxidation and combustion of the carbonaceous feedstock in a reactor. The method enables the inorganic particulate to enhance heat transfer in the reactor to mechanically ablate a surface of the reacting carbonaceous material. The method enables contacting the carbonaceous feedstock with the heated inorganic heat carrier particles at the reaction conditions effective to rapidly pyrolyze the carbonaceous feedstock to form the product stream.    DETAILED DESCRIPTION - The carbonaceous feedstock is a biomass. The heated inorganic heat carrier particle is heated sand. An INDEPENDENT CLAIM is also included for an apparatus for producing heat for rapid thermal processing of carbonaceous material.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an apparatus for facilitating a rapid thermal processing of carbonaceous material.    Inorganic heat carrier particles (18)    Carbonaceous feedstock (20)    Product stream (26)    Solid (32)    Fluidizing blower (38)