Abstract: In some embodiments, the present invention relates to methods (processes) of syngas fermentation involving an integral gasification process, and to corresponding systems for carrying out or implementing such methods. In such methods and systems of the present invention, carbon dioxide (CO2) produced during the fermentation of syngas is directed into the gasifier (e.g., as a motive gas or component thereof) where it enhances carbon monoxide (CO) production and mitigates char production.

Abstract: The present invention integrates a gasification unit into a catalyst/absorber process for removing pollutants from the combustion product of a gas turbine. A small slipstream of syngas from the gasification unit is cleaned in an acid gas removal unit to remove H2S. The syngas is then processed in a shift unit where the carbon monoxide and any COS present in the syngas are converted into hydrogen and carbon dioxide. The shifted syngas, still containing trace amounts of H2S, is then processed in a zinc oxide bed, where the trace H2S is removed. The resultant stream is hydrogen and carbon dioxide rich, making it ideal for use in regenerating the catalyst/absorber system.