Maximizing syngas carbon utilization and conversion to biofuel

A process for optimizing syngas carbon utilization and syngas purity for subsequent syngas conversion into a downstream syngas conversion unit from a scrubbed syngas source comprising the steps of:

• a) feeding a scrubbed syngas into a purification unit comprising at least one absorption unit to partially remove CO2 from said scrubbed syngas, producing a clean syngas stream adjusted to optimal target carbon content and a CO2 rich stream, wherein the purification unit is an acid gas removal unit (AGR), wherein in said AGR,
• CO2 and sulfur species are absorbed from the scrubbed syngas in said at least one absorption unit using a selective solvent, producing a loaded solvent and a clean syngas stream;
• the loaded solvent is withdrawn through at least one recirculation loop;
• the loaded solvent is pre-flashed at an intermediate pressure to recover absorbed H2 and CO, producing a CO2 rich stream rich in H2 and CO and a flashed solvent stream;
• the flashed solvent is flashed at lower pressure to recover CO2, generating a non-flammable CO2 rich stream and a second flashed solvent;
• and
• the second flashed solvent is stripped in a first stripping unit to remove the sulfur species, producing a rich sulfur species stream and a clean solvent which is recycled back into the absorption unit;
• b) mixing the clean syngas stream with hydrogen producing a balanced syngas stream, wherein the balanced syngas stream meets a stoichiometric ratio requirement of the syngas conversion unit;
• and
• c) feeding said balanced syngas stream in said syngas conversion unit.