Hybrid plant for liquid fuel production

摘要

A hybrid plant and method for producing liquid fuel product from hydrogen and carbon monoxide containing streams produced by gasifying solid carbonaceous feedstock and steam reforming of light fossil fuels. When a gasification unit in the hybrid plant is operating at reduced capacity or is not operational, oxygen that would have been used in the gasification unit is diverted to a light fossil fuel conversion unit containing an autothermal reformer to increase H2-rich syngas flow to a liquid fuel production unit and maintain liquid fuel production at near nameplate capacity.

主权项

1. A method of operating a hybrid plant, where a gasification unit in the hybrid plant is operating at less than its design capacity or is not operational, comprising:
a) increasing a light fossil fuel feed to a light fossil fuel conversion unit of the hybrid plant; b) increasing oxygen input to an autothermal reformer in said fossil fuel conversion unit by diverting at least a portion of oxygen that would have been fed to said gasification unit, conditioned on the autothermal reformer temperature and exiting volumetric gas flow not to exceed a design value; c) decreasing said light fossil fuel conversion unit steam to carbon ratio, and d) producing a liquid fuel product at a production rate between 70% to 110% of the hybrid plant design production rate.