NOVELTY - Reactive catalytic biomass pyrolysis process comprises reacting a biomass starting material under pyrolysis conditions in the presence of a catalyst and a gas feed of 10-90 vol.% hydrogen gas in a pyrolysis reactor at a pressure of less than 6 bar to form a stream comprising a pyrolysis product.    USE - The reactive catalytic biomass pyrolysis process is useful for producing a hydrocarbon-rich bio-oil intermediate, which is useful to produce a biofuel including bio-diesel, bio-gasoline, bio-jet fuel.    ADVANTAGE - The process: exhibits a carbon conversion efficiency of greater than or equal to 20 wt.%, preferably 20-65 wt.%; provides regeneration and recycling of the catalyst (all claimed); can be carried out at low pressure, hence overcomes the pressure drop in the system; utilizes the catalyst, which exhibits improved catalytic activity, and produces low oxygen content (below 10 wt.%) in the bio-crude while minimizing over cracking and coke formation; provides the bio-crude intermediate, which exhibits improved quality and yield and thermal stability, and reduced total acid number, poly-aromatic hydrocarbons, ketones and carboxylic acids, and can be efficiently and easily upgraded into a finished biofuel; provides energy recovery in the liquid product; and is reliable and cost effective.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a catalytic biomass pyrolysis system, comprising: a reactor adapted for reacting a biomass with a catalyst and a gas stream with 10-90 vol.% hydrogen gas at a pressure of less than 6 bar under pyrolysis conditions to form a pyrolysis reaction stream; a separation unit that is in connection with the reactor and adapted to form a first stream comprising a solids fraction from the pyrolysis reaction stream and a second stream comprising vapors fraction from the pyrolysis reaction stream; and a condenser unit that is in communication with the separation unit and adapted to condense a mixture of bio-crude, water and/or another liquid from the vapors in the second stream to separate from a gas component of the second stream.