Method and system for producing alternative liquid fuels or chemicals
View Patent ↗A method and system for the production of valuable chemicals or alternative liquid fuels via an integrated biomass conversion and upgrading process is disclosed. The process integrates three subcomponent processes, capturing the desirable attributes of each: zoned partial oxidation, alcohol production, and gas-to-liquids reformation. The method and system may include reacting gasification intermediates—e.g., syngas from zoned partial oxidation, with bioprocessing intermediates—e.g., aqueous ethanol from alcohol production in a reactive separation to produce a product(s) of higher alcohols, liquid hydrocarbons, or a combination of these. The product(s) can be split into two (or more) boiling point fractions by the same reactive separations unit operation. The resulting product(s) are valuable for a variety of applications, including potentially as alternative (non-fossil-based) liquid transportation fuels.
1. A method for converting hydrocarbon-containing materials into valuable chemicals, the method comprising:
producing a syngas intermediate comprising hydrogen and CO by zoned partial oxidation and/or gasification of at least a portion of a hydrocarbon-containing material input;
introducing the syngas intermediate into a reactive separation unit;
producing in an alcohol generation unit an alcohol intermediate comprising at least one or more alcohols or aqueous mixtures containing one or more alcohols;
introducing the alcohol intermediate into the reactive separation unit; and
chemically reforming the syngas intermediate and the alcohol intermediate in the reactive separation unit to produce at least one product selected from the group consisting of saturated hydrocarbons, higher alcohols, and mixtures thereof.
2. The method of claim 1 , wherein the zoned partial oxidation and/or gasification is performed using a molten metal system.
3. The method of claim 1 , wherein the zoned partial oxidation and/or gasification is performed using a fluidized bed system.
4. The method of claim 1 , wherein the hydrocarbon-containing material input includes a combination of biomass and other hydrocarbon-containing materials.
5. The method of claim 1 , wherein the alcohol intermediate is produced by fermentation of biomass.
6. The method of claim 1 , further comprising:
introducing at least a portion of bulk solids into the zoned partial oxidation unit, the bulk solids including solid matter greater than l mm in size.
7. The method of claim 6 , further comprising:
subjecting the hydrocarbon-containing material input to a thermal or pyrolysis pretreatment in a first zone in the zoned partial oxidation unit, the thermal or pyrolysis pretreatment resulting in tars, gases, char, or other solid residuals; and
processing the resultant tars, gases, chars, or other solid residuals in one or more subsequent zones in the zoned partial oxidation unit to produce the syngas.
8. The method of claim 1 , further comprising:
gasification processing of supplemental inputs in a zoned partial oxidation unit, the supplemental inputs comprising at least one material selected from the group consisting of: (i) solid byproduct derived from fermentation of biomass after first subjecting an aqueous slurry, fermentation intermediate to coarse solid-liquid separation;
(ii) hydrocarbon-containing materials at least partially derived from biomass; (iii) hydrocarbon-containing materials from available waste or other byproduct streams or inventories; (iv) one or more carbon-rich materials; (v) one or more hydrogen-rich materials; and (vi) combinations thereof.
9. The method of claim 8 , further comprising:
recombining the syngas intermediate streams generated in the zoned partial oxidation unit so as to achieve a desired H 2 /CO ratio in the syngas prior to chemically reforming; and
adjusting the rate or composition of the syngas intermediate introduced into the reactive separation unit and adjusting the rate or composition of the supplemental inputs in the zoned partial oxidation unit using feedback control to achieve a final desired product composition.
10. A method for converting hydrocarbon-containing materials into valuable chemicals, the method comprising:
feeding a stream of materials into an alcohol generation unit to produce a first stream of alcohol-containing aqueous intermediate;
subjecting the first stream to primary separations processing in a primary separations unit to remove a mixture of water and solids and to produce a resultant stream of aqueous alcohol;
feeding one or more non-fermentable solid streams into a zoned partial oxidation unit;
introducing a first co-feed stream into the zoned partial oxidation unit, the first co-feed stream comprising a carbon-rich or hydrogen-rich stream;
introducing a second co-feed stream into the zoned partial oxidation unit, the second co-feed stream comprising an oxidant relative to the conditions in the zoned partial oxidation unit;
carrying out one or more processes selected from the group consisting of devolatilization, pyrolysis, and partial oxidation in the zoned partial oxidation unit;
yielding at least one of a hydrogen-rich syngas intermediate output and a CO-rich syngas intermediate output from the zoned partial oxidation unit;
combining or recombining the at least one of hydrogen-rich syngas intermediate output and the CO-rich syngas intermediate output to produce a combined syngas stream;
concurrently introducing the combined syngas stream and the resultant stream of aqueous alcohol into a reactive separation unit, the reactive separation unit subjecting the combined syngas stream and the resultant stream of aqueous alcohol to gas-to-liquid reformation reactions; and
producing a product stream comprising at least one component selected from the group consisting of a higher alcohol liquid, an aliphatic liquid hydrocarbon, and mixtures thereof.
11. The method of claim 10 , wherein the first stream of alcohol-containing aqueous intermediate is a bioethanol-water intermediate.
12. The method of claim 10 , wherein the removed mixture of water and solids is processed into dried distiller's grains, and the water is recovered, treated and recycled for further fermentation or process uses.
13. The method of claim 10 , wherein the gas-to-liquid reformation reaction(s) in the reactive separation unit are accomplished by a process selected from staged reaction and distillation or reactive distillation.
14. The method of claim 10 , wherein zoned partial oxidation is carried out using a process selected from fluidized-bed gasification or molten-metal gasification.
15. The method of claim 10 , wherein the one or more non-fermentable solids fed into the zoned partial oxidation unit includes additional biomass.
16. The method of claim 15 , wherein the additional biomass comprises non-fermentable fractions comprised of one or more components selected from the group consisting of cellulosic material, lignin, byproducts or wastes of pulp or paper processing, and mixtures thereof.
17. The method of claim 10 , further comprising:
producing a hydrogen-rich syngas intermediate output and a CO-rich syngas intermediate output from the zoned partial oxidation unit;
recombining the hydrogen-rich syngas intermediate output and the CO-rich syngas intermediate output to produce a combined syngas stream of desired composition prior to introducing the combined syngas stream into the reactive separation unit.