PROCESS FOR CONTROLLING SULFUR IN A FERMENTATION SYNGAS FEED STREAM

  • US 20110104770A1
  • Filed: 10/28/2010
  • Published: 05/05/2011
  • Est. Priority Date: 10/30/2009
  • Status: Active Grant
First Claim
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1. A process for producing liquid products from biomass generated syngas using microorganisms having metabolic processes that utilize sulfur in limited amounts, the method comprising:

  • a) charging a biomass feed containing sulfur compounds to a gasification unit;

    b) heating the biomass feed in an oxygen controlled atmosphere within the gasification unit to produce a residue, gaseous sulfur or sulfur compounds, and syngas containing at least one of CO or a mixture of CO2 and H2;

    c) removing the residue from the gasification unit;

    d) collecting gaseous sulfur or sulfur compounds with the syngas from the gasification unit to a produce sulfur containing syngas and passing at least a portion of the sulfur containing syngas to a bioreactor;

    e) contacting the sulfur containing syngas in the bioreactor with microorganisms to convert at least a portion of the syngas components to the liquid products and to provide sulfur to the microorganisms;

    and,g) recovering a fermentation liquid from the bioreactor containing the liquid products.

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