Methods, systems, and devices for continuous fuel production are provided. Some embodiments may utilize two pyrolysis platforms, which may utilize biomass as a feedstock. One platform may generally utilize a high temperature pyrolysis process that may generate at least hydrogen and carbon monoxide. This high temperature gas stream may be fed into a lower temperature fast pyrolysis stream as a cover gas. The hot cover gas may react with the fast pyrolysis vapors hydrotreating while the vapors may still be hot and the molecules may still be small. The reacted product may then be distilled on the cool down. This may provide a rapid continuous process for the production of liquid fuels from biomass or other compounds that include carbon-oxygen-hydrogen (C—O—H) compounds.