SYSTEMS AND PROCESSES FOR PRODUCING LIQUID TRANSPORTATION FUELS
Disclosed in the application include systems and processes for producing a liquid transportation fuel product using a carbon-containing feedstock.
1 . A system for converting a carbon-containing feedstock into a liquid transportation fuel product, the system comprising
an air-blown producer gas reactor operable to convert the carbon-containing feedstock into a producer gas comprising H 2 , CO, CO 2 , and N 2 , with substoichiometeric amounts of H 2 and CO (less than 2:1 molar ratio of H 2 to CO);
a processing unit, wherein the processing unit comprises a Fischer-Tropsch (F-T) reactor, and a cracker,
wherein the F-T reactor is fluidly coupled to a source of feed gas and operable to convert at least a portion of the feed gas into a FTS product, wherein the FTS product comprises the liquid transportation fuel product and a first residue, and
wherein the cracker is fluidly coupled to the F-T reactor and operable to catalytically crack at least a portion of the first residue to produce an additional amount of the liquid transportation fuel product and a second residue; and
a product upgrading unit, wherein the product upgrading unit is operable to produce an additional amount of the liquid transportation fuel product from a product gas.
2 . The system of claim 1 , wherein the carbon-containing feedstock comprises at least one feedstock selected from the group consisting of a ligno-cellulosic biomass solid, a biomass derived oil, a biomass derived gas, and a fossil-fuel derived carbonaceous feedstock.
3 . The system of claim 1 , wherein the F-T reactor is fluidly coupled to the air-blown producer gas reactor, wherein the feed gas to the F-T reactor comprises the producer gas.
4 . The system of claim 1 , wherein the product gas comprises at least a portion of the first residue or at least a portion of the second residue.
5 . The system of claim 1 comprising a hard-wax trap, wherein the hard-wax trap is fluidly coupled to the F-T reactor and the cracker, wherein at least a portion of the first residue and/or at least a portion of the second residue is delivered to the hard-wax trap, wherein the hard-wax trap is operable to separate an additional amount of the liquid transportation fuel product and a mixture from a hard-wax product.
6 . The system of claim 5 , wherein the product gas comprises the mixture.
7 . The system of claim 1 , wherein the system comprises more than one processing unit, wherein the feed gas of the F-T reactor of at least one of the processing units comprises the producer gas from the air-blown producer gas reactor, wherein the feed gas of the F-T reactor of at least one of the processing units comprises at least a portion of the FTS product generated in another F-T reactor of the system.
8 . The system of claim 7 , wherein the more than one processing unit are fluidly coupled in series.
9 . The system of claim 1 comprising a soft-wax trap, wherein the soft-wax trap is fluidly coupled to the F-T reactor, wherein the soft wax trap is operable to separate an additional amount of the liquid transportation fuel product from the feed gas.
10 . The system of claim 1 comprises a gas preheater, wherein the gas preheater is fluidly coupled to the F-T reactor, wherein the gas preheater is operable to preheat the feed gas.
11 . The system of claim 10 , wherein at least one of the more than one processing unit comprises a soft-wax trap, wherein the soft-wax trap is fluidly coupled between the gas preheater and the F-T reactor, wherein the soft-wax trap is operable to separate an additional amount of the liquid transportation fuel product from the preheated feed gas.
12 . The system of claim 1 , wherein the product upgrading unit comprises at least one apparatus selected from the group consisting of a condenser, a hydrogenation apparatus, a distillation apparatus, an isomerization apparatus, a molecular-sieve polishing apparatus, an activated-carbon polishing apparatus, and a hydrogen membrane.
13 . The system of claim 1 , wherein the product upgrading unit generates a third residue.
14 . The system of claim 13 , wherein the product upgrading unit is fluidly coupled to the F-T reactor, wherein the third residue is delivered to the F-T reactor for further processing.
15 . The system of claim 1 , wherein at least one of the F-T reactors comprises a catalyst, wherein the catalyst is operable to catalyze a Fischer-Tropsch Synthesis (FTS) reaction.
16 . The system of claim 15 , wherein the catalyst comprises iron.
17 . The system of claim 15 , wherein the catalyst is promoted by a Group 1 metal.
18 . The system of claim 15 , wherein the catalyst is operable to catalyze a water-gas-shift (WGS) reaction between water (H 2 O) and carbon monoxide (CO).
19 . The system of claim 1 , wherein at least one of the crackers in the processing unit or in the product upgrade unit comprises a cracking catalyst.
20 . The system of claim 19 , wherein the cracking catalyst comprises a zeolite that can catalytically crack at least one composition selected from the group consisting of a wax and an aromatized light olefin.
21 .- 31 . (canceled)