Methods for deoxygenating biomass-derived pyrolysis oil
AssigneeUop LLC
InventorTimothy A. Brandvold
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Abstract
Methods for deoxygenating a biomass-derived pyrolysis oil are provided. In an embodiment, a method comprises the steps of diluting the biomass-derived pyrolysis oil with a phenolic-containing diluent to form a diluted pyoil-phenolic feed. The diluted pyoil-phenolic feed is contacted with a deoxygenating catalyst in the presence of hydrogen at hydroprocessing conditions effective to form a low-oxygen biomass-derived pyrolysis oil effluent.
Claims20
A method for deoxygenating a biomass-derived pyrolysis oil, the method comprising the steps of:
- diluting the biomass-derived pyrolysis oil with a phenolic-containing diluent to form a diluted pyoil-phenolic feed;
- and
- contacting the diluted pyoil-phenolic feed with a deoxygenating catalyst in the presence of hydrogen at hydroprocessing conditions effective to form a low-oxygen biomass-derived pyrolysis oil effluent.
A method for deoxygenating a biomass-derived pyrolysis oil, the method comprising the steps of:
- combining a pyoil-containing stream that comprises the biomass-derived pyrolysis oil with a phenolic-containing diluent at a predetermined diluent ratio to form a diluted pyoil-phenolic feed stream, wherein the predetermined diluent ratio is defined by a diluent mass flow rate of the phenolic-containing diluent to a pyoil mass flow rate of the pyoil-containing stream;
- and
- introducing the diluted pyoil-phenolic feed stream and a hydrogen-containing gas stream to a reactor that contains a deoxygenating catalyst and that is operating at hydroprocessing conditions effective to form a low-oxygen biomass-derived pyrolysis oil effluent.
A method for deoxygenating a biomass-derived pyrolysis oil, the method comprising the steps of:
- separating a phenolic-containing diluent recycle stream from a low-oxygen biomass-derived pyrolysis oil effluent that was formed in a reactor that contains a deoxygenating catalyst and that is operating at hydroprocessing conditions effective for hydroprocessing the biomass-derived pyrolysis oil in the presence of hydrogen;
- combining the phenolic-containing diluent recycle stream with a pyoil-containing stream that comprises the biomass-derived pyrolysis oil at a predetermined recycle ratio to form a diluted pyoil-phenolic feed stream, wherein the predetermined recycle ratio is defined by a recycle diluent mass flow rate of the phenolic-containing diluent recycle stream to a pyoil mass flow rate of the pyoil-containing stream, wherein the predetermined recycle ratio is from about 1:10 to about 10:1;
- and
- introducing a hydrogen-containing gas stream and the diluted pyoil-phenolic feed stream to the reactor.
Dependencies are inferred from the claim text.