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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
Embodiments of a method for producing bio-oil include hydrothermal liquefaction of a biomass (e.g., a lignocellulosic biomass) feedstock to provide a process stream comprising crude oil and an aqueous fraction. The process stream is catalytically upgraded by contact with a sulfided-ruthenium catalyst, in the absence of added hydrogen, at a temperature and pressure effective to reduce an oxygen content of the crude oil, reduce a nitrogen content of the crude oil, reduce a total acid number of the crude oil, increase a H:C mole ratio of the crude oil, reduce a density of the crude oil, reduce a moisture content of the crude oil, reduce viscosity of the crude oil, or any combination thereof, thereby producing an upgraded oil and an upgraded aqueous fraction, which are subsequently separated. The catalytic upgrading process may be a plug-flow process and/or may be performed at or near liquefaction conditions.
Hart, Todd R. (Kennewick, WA), Elliott, Douglas C. (Richland, WA), Schmidt, Andrew J. (Richland, WA), Hallen, Richard T. (Richland, WA)
Battelle Memorial Institute
15/ 195,553
June 28, 2016
ACKNOWLEDGMENT OF GOVERNMENT SUPPORT [0001] This invention was made with government support under DE-AC0576RL01830 awarded by the U.S. Department of Energy. The government has certain rights in the invention.