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Removal of hydrogen sulfide as ammonium sulfate from hydropyrolysis product vapors

United States Patent

March 14, 2017
View the Complete Patent at the US Patent & Trademark Office
A system and method for processing biomass into hydrocarbon fuels that includes processing a biomass in a hydropyrolysis reactor resulting in hydrocarbon fuels and a process vapor stream and cooling the process vapor stream to a condensation temperature resulting in an aqueous stream. The aqueous stream is sent to a catalytic reactor where it is oxidized to obtain a product stream containing ammonia and ammonium sulfate. A resulting cooled product vapor stream includes non-condensable process vapors comprising H.sub.2, CH.sub.4, CO, CO.sub.2, ammonia and hydrogen sulfide.
Marker; Terry L. (Palos Heights, IL), Felix; Larry G. (Pelham, AL), Linck; Martin B. (Grayslake, IL), Roberts; Michael J. (Itasca, IL)
Gas Technology Institute (Des Plaines, IL)
14/ 512,841
October 13, 2014
GOVERNMENT LICENSE RIGHTS This invention was made with government support under Contract No. DE-EE0002873awarded by the U.S. Department of Energy. The government has certain rights in the invention.