PROCESS FOR HYDRODEOXYGENATION AND PROCESS FOR UPGRADING OF PYROLYSIS OIL RESULTING FROM BIOMASS, WHICH ARE CAPABLE OF OPERATING CONTINUOUSLY
First Claim
1. A process for the catalytic hydrodeoxygenation (HDO) of biomass pyrolysis oil and/or of the ligneous organic phase resulting from the phase separation of biomass pyrolysis oil to which water has been added, comprising a plurality of catalytic beds arranged in series and distributed in one or more reactors which is/are equipped with means for controlling the temperature, and characterized by:
- the injection of the pyrolysis oil at the top of the 1st catalytic bed,the fractional injection of the hydrogen;
the 1st injection of hydrogen is carried out at the top of the 1st catalytic bed,the other injection or injections of H2 being carried out between 2 catalytic beds and being chosen so that the difference between 2 successive H2 injection temperatures does not exceed 50°
C., Δ
Tmax≦
50°
C., with Δ
Tmax=[rank (n+1) H2 injection temperature]−
[rank (n) H2 injection temperature],the separation of the liquid effluents at the outlet of the final catalytic bed into a liquid phase and an organic phase, it being possible for a portion of the organic phase optionally to be recycled in the reactor, for example to be reinjected with the pyrolysis oil,preferably, the amount of hydrogen injected into a bed is equal to the stoichiometric amount necessary to achieve a target Δ
T in this bed,and/or, preferably, the amount of hydrogen injected at the top of the 1st bed is such that the water of the pyrolysis oil is not evaporated.
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Accused Products
Abstract
The invention relates to a process for hydrodeoxygenation (HDO) of pyrolysis oil and also to a process for upgrading of pyrolysis oil implementing said HDO process, and also to processing of the aqueous phase resulting from the HDO by steam pre-reforming and then steam reforming.
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Citations
12 Claims
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1. A process for the catalytic hydrodeoxygenation (HDO) of biomass pyrolysis oil and/or of the ligneous organic phase resulting from the phase separation of biomass pyrolysis oil to which water has been added, comprising a plurality of catalytic beds arranged in series and distributed in one or more reactors which is/are equipped with means for controlling the temperature, and characterized by:
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the injection of the pyrolysis oil at the top of the 1st catalytic bed, the fractional injection of the hydrogen; the 1st injection of hydrogen is carried out at the top of the 1st catalytic bed, the other injection or injections of H2 being carried out between 2 catalytic beds and being chosen so that the difference between 2 successive H2 injection temperatures does not exceed 50°
C., Δ
Tmax≦
50°
C., with Δ
Tmax=[rank (n+1) H2 injection temperature]−
[rank (n) H2 injection temperature],the separation of the liquid effluents at the outlet of the final catalytic bed into a liquid phase and an organic phase, it being possible for a portion of the organic phase optionally to be recycled in the reactor, for example to be reinjected with the pyrolysis oil, preferably, the amount of hydrogen injected into a bed is equal to the stoichiometric amount necessary to achieve a target Δ
T in this bed,and/or, preferably, the amount of hydrogen injected at the top of the 1st bed is such that the water of the pyrolysis oil is not evaporated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for upgrading pyrolysis oil and/or the ligneous organic phase resulting from the phase separation of biomass pyrolysis oil to which water has been added to give liquid fuels, comprising the following stages:
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extensive or total HDO of pyrolysis oil and/or of the ligneous organic phase resulting from the phase separation of biomass pyrolysis oil to which water has been added, according to the HDO process as defined above (1st stage), followed by separation of the liquid effluent obtained into a light aqueous fraction and a heavy organic fraction; prereforming the “
light”
aqueous fraction and treating the “
light”
aqueous fraction in an SMR unit in order to produce hydrogen;hydrotreating said “
heavy”
organic fraction resulting from the HDO, optionally in combination with conventional refinery fuel bases.
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Specification