Process for catalytic hydrotreatment of a pyrolysis oil
View Patent ↗A process for catalytic hydrotreatment of a pyrolysis oil derived from lignocelluloses is provided.
1. In a process for treating a pyrolysis oil derived from a material comprising lignocellulose in which
a) a feed comprising the pyrolysis oil is subjected to a hydrodeoxygenation step in the presence of a catalyst comprising an active component on a catalyst carrier that is inert at the reaction conditions, to obtain a product stream comprising a partially deoxygenated pyrolysis oil;
b) separating the partially deoxygenated pyrolysis oil from the product stream obtained in a) thereby producing a separated partially deoxygenated pyrolysis oil;
the improvement comprising the further steps of
c) providing to a hydrogenation step at least a portion of the separated partially deoxygenated pyrolysis oil having an oxygen content of from 10 to 30 wt %;
d) hydrogenating, in the hydrogenation step, the separated partially deoxygenated pyrolysis oil from c) in the presence of a catalyst and a hydrocarbon feed derived from a mineral crude oil to obtain a hydrogenated product stream; and
e) separating at least one product fraction from the hydrogenated product stream obtained in d).
2. The process of claim 1 wherein the partially deoxygenated pyrolysis oil in step c) has an oxygen content (on dry basis) of at least 15 wt % and at most 17 wt %.
3. The process of claim 1 wherein the hydrocarbon feed has an initial boiling point of at least 220° C., as measured according to ASTM D-2887.
4. The process of claim 3 wherein the partially deoxygenated pyrolysis oil in step c) has an oxygen content (on dry basis) of at least 15 wt % and at most 17 wt %.
5. The process of claim 1 wherein the mineral crude oil is gas oil.
6. The process of claim 2 wherein the mineral crude oil is gas oil.
7. The process of claim 3 wherein the mineral crude oil is gas oil.
8. The process of claim 1 wherein the hydrogenation step is performed at a temperature ranging from 300° C. to 450° C.
9. The process of claim 2 wherein the hydrogenation step is performed at a temperature ranging from 300° C. to 450° C.
10. The process of claim 3 wherein the hydrogenation step is performed at a temperature ranging from 300° C. to 450° C.
11. The process of claim 5 wherein the hydrogenation step is performed at a temperature ranging from 300° C. to 450° C.
12. The process of claim 1 wherein the hydrogenation step is performed at a pressure ranging from 50 bars to 100 bars.
13. The process of claim 2 wherein the hydrogenation step is performed at a pressure ranging from 50 bars to 100 bars.
14. The process of claim 3 wherein the hydrogenation step is performed at a pressure ranging from 50 bars to 100 bars.
15. The process of claim 5 wherein the hydrogenation step is performed at a pressure ranging from 50 bars to 100 bars.
16. The process of claim 9 wherein the hydrogenation step is performed at a pressure ranging from 50 bars to 100 bars.
17. The process of claim 1 wherein the hydrogenation step (d) is performed in the presence of nickel, cobalt and/or molybdenum based catalyst.
18. The process of claim 2 wherein the hydrogenation step (d) is performed in the presence of nickel, cobalt and/or molybdenum based catalyst.
19. The process of claim 3 wherein the hydrogenation step (d) is performed in the presence of nickel, cobalt and/or molybdenum based catalyst.
20. The process of claim 16 wherein the hydrogenation step (d) is performed in the presence of nickel, cobalt and/or molybdenum based catalyst.
21. The process of claim 1 further comprising blending a product fraction obtained in step (e) with at least one fuel component other than the product fraction and/or an additive.
22. In a process for producing hydrocarbon products from biomass by pyrolyzing a biomass comprising lignocellulose to obtain a pyrolysis oil, subjecting the pyrolysis oil to a hydrodeoxygenation step in the presence of a catalyst comprising an active component on a catalyst carrier that is inert at the reaction conditions, to obtain a product stream comprising a partially deoxygenated pyrolysis oil;
separating the partially deoxygenated pyrolysis oil from the product stream thereby producing a separated partially deoxygenated pyrolysis oil;
the improvement comprising the further steps of providing to a hydrogenation step at least a portion of the separated partially deoxygenated pyrolysis oil having an oxygen content of from 10 to 30 wt %;
hydrogenating, in the hydrogenation step, said provided-separated partially deoxygenated pyrolysis oil in the presence of a catalyst and a hydrocarbon feed derived from a mineral crude oil to obtain a hydrogenated product stream;
separating at least one product fraction from the hydrogenated product stream; and
blending at least one product fraction obtained with at least another fuel compound and/or an additive thereby producing a biofuel.