NOVELTY - Converting (I) a solid biomass material (112) comprises: mixing a solid biomass material with a fluid to form a fluidized biomass stream; and propagating the fluidized biomass stream into a riser reactor via at least one delivery aperture, where the solid biomass material has a particle size distribution with a mean particle size diameter and the delivery aperture has a diameter greater than or equal to 3 times the mean particle size diameter of the particle size distribution of the solid biomass material.    USE - The process is useful for converting solid biomass material (claimed) in to a biofuel and/or biochemical component.    ADVANTAGE - The process is simple and requires minimum processing steps to convert solid biomass material.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) converting a solid biomass material comprising feeding the solid biomass material into a riser reactor via the delivery aperture, where the solid biomass material has a particle size distribution with a mean particle size diameter, and the delivery aperture has a diameter greater than or equal to 3 the mean particle size diameter of the particle size distribution of the solid biomass material, and contacting the solid biomass material with a catalytic cracking catalyst at greater than or equal to 400 degrees C in the riser reactor to produce at least one product; and    (2) configuring an existing fluidized catalytic cracking unit comprising the riser reactor to convert the solid biomass material, comprising replacing at least one existing feedstock distributors comprising delivery apertures having a first diameter with at least one new feedstock distributors comprising delivery apertures having a second diameter, where the second diameter is larger than the first diameter and the second diameter is greater than or equal to 3 times the mean particle size diameter of the particle size distribution of the solid biomass material to be fed into the new feedstock distributors.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the process.    Feed nozzle (102)    Inner tube (104)    Outer tube (108)    Annular conduit (110)    Solid biomass material (112)