Process for controlling sulfur in a fermentation syngas feed stream
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United States of America Patent
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Dec 3, 2013
Grant Date -
May 5, 2011
app pub date -
Oct 28, 2010
filing date -
Oct 30, 2009
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Abstract
Ethanol and other liquid products are produced from biomass using gasification of the biomass to produce a syngas containing CO2, CO, H2 and sulfur or sulfur compounds that passes the syngas to a fermentation step for the conversion of the CO and CO2 and H2 to ethanol. Sulfur and sulfur compounds in the syngas are used to satisfy sulfur demanded by bacteria in the fermentation step. A sulfur control additive is added to the gasification to control syngas sulfur and sulfur compounds at a desired concentration to meet bacteria sulfur demand.
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