Processes and systems for producing hydrocarbon fuels having high carbon conversion efficiency

A system for producing a hydrocarbon-based fuels, the system comprising:

• a biomass feedstock processing unit configured to remove waste from a feedstock to produce a processed feedstock;
• a gasification unit in communication with the biomass feedstock processing unit, wherein the gasification unit is configured to convert the processed feedstock into syngas comprising carbon dioxide, carbon monoxide, and hydrogen;
• a reactor downstream from the gasification unit, wherein the reactor is operated at suitable conditions to promote conversion of portions of the syngas to produce a proper ratio of hydrogen to CO;
• a scrubber in communication with the reactor, wherein the scrubber removes carbon dioxide from the syngas to produce a purified syngas having a hydrogen to carbon monoxide ratio of at least 1.5:1;
• a Fischer Tropsch reactor for receiving the purified syngas, wherein the Fischer Tropsch reactor converts the purified syngas into Fischer-Tropsch liquids, water, and tail gas;
• an electrolysis unit configured to receive the water from the Fischer Tropsch reactor, wherein the electrolysis unit converts the water into an oxygen stream and a hydrogen stream;
• and
• a reverse water-gas shift reactor, wherein a portion of the carbon dioxide removed from the syngas in the scrubber is recycled to the reverse water-gas shift reactor;
• wherein a portion of the oxygen stream is recycled to the gasification unit, the reactor, or combinations thereof;
• and
• wherein the system achieves at least 90% carbon conversion of the processed feedstock.