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METHODS AND SYSTEMS FOR DEOXYGENATING BIOMASS-DERIVED PYROLYSIS OIL WITH A RECYCLE COLUMN

United States Patent Application

20150159093
A1
View the Complete Application at the US Patent & Trademark Office
Methods and systems for deoxygenating a biomass-derived pyrolysis oil are provided. An exemplary method includes combining a biomass-derived pyrolysis oil stream with a heated low-molecular weight fraction low-oxygen-pyoil diluent recycle stream to form a heated diluted pyoil feed stream, which is contacted with a first deoxygenating catalyst in the presence of hydrogen at first hydroprocessing conditions effective to form a low-oxygen biomass-derived pyrolysis oil effluent. A low-molecular weight fraction low-oxygen-pyoil diluent recycle stream is formed by contacting the low-oxygen biomass-derived pyrolysis oil effluent with a fractionation column to separate a low molecular weight fraction low-oxygen-pyoil diluent recycle stream at a cutpoint of about 225.degree. C. or less. The low-molecular weight fraction low-oxygen-pyoil diluent recycle stream is then heated prior to combination with the biomass-derived pyrolysis oil stream.
Baird, Lance Awender (Prospect Heights, IL), Brandvold, Timothy A. (Arlington Heights, IL), Edirisinghe, Praneeth Dayanthe (Chicago, IL)
UOP LLC (Des Plaines IL)
14/ 101,842
December 10, 2013
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0001] This invention was made with Government support under DE-EE0002879 awarded by the U.S. Department of Energy. The Government has certain rights in this invention.