Reactive catalytic fast pyrolysis process and system

An integrated reactive catalytic biomass pyrolysis process comprising reacting in a single primary catalytic reactor

• (i) a biomass starting material with a moisture content of 15% of less by mass under pyrolysis conditions in the presence of
• (ii) a hydrodeoxygenation (HDO) catalyst added in direct contact with the biomass in the primary catalytic reactor and
• (iii) an external hydrogen gas feed to the single primary catalytic reactor of about 10 volume % to about 90 volume % hydrogen gas at a pressure of less than about 6 bar to form a stream comprising a pyrolysis product comprising a bio-oil.