NOVELTY - Pyrolysis reactor comprises: a horizontal, rotatable reactor drum (114) comprising an annular wall disposed around a horizontal axis, where the annular wall is permeable to particulate material; a rotation drive connected to the rotatable reactor drum and configured to rotate the rotatable reactor drum about the horizontal axis; a feed conduit (104) configured to transport pyrolyzable matter from a source of pyrolyzable matter into the rotatable reactor drum; and a reaction chamber (112) in which the rotatable reactor drum and at least a portion of the feed conduit are housed.    USE - The pyrolysis reactor is useful in pyrolysis system for integrated pyrolysis of pyrolyzable matter containing biomass, and hydrodeoxygenation of organic pyrolysis products to form a drop-in bio-fuel (all claimed), liquid fuels and/or value-added chemicals.    ADVANTAGE - The pyrolysis reactor: has substantially reduced size, decreased pressure drop inside of the reaction chamber, simplified processing system, and reduced processing cost, relative to other pyrolysis reactors; increases the heating rate and energy transfer efficiencies between the pyrolysis reactants and the heat transfer material, and increases catalysis reaction rates and decreases the number of bed modules necessary for large system capacity, thus improving the overall processing efficiency and product yield; and minimizes abrasive wear on catalyst particles and thus increases the life time of the catalyst.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a system for the pyrolysis of a pyrolyzable matter, comprising a pyrolysis reactor comprising: the horizontal, rotatable reactor drum; the rotation drive; the feed conduit; the reaction chamber; the source of pyrolyzable matter, where the source comprises particulate pyrolyzable matter and is configured to deliver the particulate pyrolyzable matter to the feed conduit; and heat transfer particles disposed within the rotatable reactor drum, where the annular wall of the rotatable reactor drum is substantially impermeable to the particulate pyrolyzable matter;    (2) a method (m1) for pyrolyzing pyrolyzable matter, comprising: delivering particulate pyrolyzable matter into a horizontally rotating reactor drum having disposed heat transfer particles, where the rotating reactor drum comprises an annular wall that is substantially impermeable to the particulate pyrolyzable matter being delivered and to the heat transfer particles; and horizontally rotating the rotatable rotating reactor drum containing the resulting mixture of particulate pyrolyzable matter and heat transfer particles for a time, and at a temperature, sufficient to result in the pyrolysis of the particulate pyrolyzable matter to form a mixture of pyrolysis products comprising solid char particles and a vapor-phase comprising condensable organic molecules and non-condensable molecules, where the annular wall of the rotating reactor drum is substantially permeable to the solid char particles, so that the solid char particles exit the rotating reactor drum through the annular wall;    (3) a method (m2) for integrated pyrolysis of pyrolyzable matter and hydrodeoxygenation of organic pyrolysis products, comprising: pyrolyzing the pyrolyzable matter in the pyrolysis reactor in the presence of hydrogen and pyrolysis and hydrogenation catalysts, so that oxygenated organic pyrolysis product molecules undergo hydrogenation reactions in the pyrolysis reactor; separating solid pyrolysis products from vapor-phase products comprising pyrolysis and hydrogenation products; and hydrodeoxygenating the separated vapor-phase products in the presence of hydrogen and a hydrodeoxygenation catalyst in a hydrodeoxygenation reactor; and    (4) a drop-in bio-fuel obtained by the method (m2), has a water content of less than 0.2 wt.% and an oxygen content of less than 2 wt.%.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the rotating fluidized-bed fast pyrolysis reactor.    Feed conduit (104)    Reaction chamber (112)    Horizontal, rotatable reactor drum (114)    Annular space (119)    Product collection chamber (132)