Systems and/or methods for producing synthetic hydrocarbons from biomass

A system configured for converting biomass to synthetic hydrocarbons, the system comprising:

• a biomass preparer configured to:
• sort and/or change a particle size, density, and/or dryness of a received biomass provided to the biomass preparer sufficiently for a resulting prepared biomass to have, on average, dimensions between approximately 0.5 and approximately 30 centimeters, a bulk density between approximately 0.2 and approximately 0.9 kilogram/liter, and/or a dryness between 0 and approximately 30 weight percent;
• and
• convey and/or store sufficient prepared biomass to operate a first thermal decomposer for at least 1 hour at approximately a nameplate input flow rate of the first thermal decomposer;
• the first thermal decomposer, wherein the first thermal decomposer is configured to convert prepared biomass into synthesis gas;
• a synthesis gas cleaner configured to produce cleaned synthesis gas from synthesis gas;
• a hydrocarbon synthesizer configured to produce synthetic hydrocarbons from synthesis gas and/or hydrogen-comprising gas;
• a mass and/or heat integrator configured to add natural gas, a hydrocarbon-comprising gas, and/or the hydrogen-comprising gas to a recycle mass coproduct of the hydrocarbon synthesizer for supply to the first thermal decomposer and/or a second thermal decomposer.