US2025197750A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025197750-A1 |
| Application number | US-202519062171-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 25, 2025 |
| Priority date | Sep 1, 2022 |
| Publication date | Jun 19, 2025 |
| Grant date | — |
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A liquid fuel production system includes: a liquid fuel-synthesizing portion configured to advance a conversion reaction from a raw material gas containing at least hydrogen and a carbon oxide to a liquid fuel; a raw material gas-supplying portion configured to supply the raw material gas to the liquid fuel-synthesizing portion; and a raw material gas-circulating portion configured to resupply a remaining raw material gas, which contains the hydrogen and the carbon oxide that are unreacted, and an acidic by-product of the conversion reaction, from the liquid fuel-synthesizing portion to the raw material gas-supplying portion, wherein the raw material gas-supplying portion includes a mixing portion configured to mix an amine compound and the remaining raw material gas in the presence of water vapor, and a moisture-removing portion configured to remove a neutralized product of the amine compound and the acidic by-product together with condensed water of the water vapor.
Opening claim text (preview).
What is claimed is: 1 . A liquid fuel production system, comprising: a liquid fuel-synthesizing portion configured to advance a conversion reaction from a raw material gas containing at least hydrogen and a carbon oxide to a liquid fuel; a raw material gas-supplying portion configured to supply the raw material gas to the liquid fuel-synthesizing portion; and a raw material gas-circulating portion configured to resupply a remaining raw material gas, which contains the hydrogen and the carbon oxide that are unreacted, and an acidic by-product of the conversion reaction, from the liquid fuel-synthesizing portion to the raw material gas-supplying portion, wherein the raw material gas-supplying portion includes a mixing portion configured to mix an amine compound and the remaining raw material gas in the presence of water vapor, and a moisture-removing portion configured to remove a neutralized product of the amine compound and the acidic by-product together with condensed water of the water vapor. 2 . The liquid fuel production system according to claim 1 , wherein a neutralizing raw material gas containing the amine compound and the remaining raw material gas are mixed in the mixing portion. 3 . The liquid fuel production system according to claim 1 , wherein the raw material gas further contains nitrogen, and wherein the amine compound is ammonia produced from the hydrogen and the nitrogen in the liquid fuel-synthesizing portion. 4 . The liquid fuel production system according to claim 2 , further comprising a gas-capturing portion configured to capture carbon dioxide from air or a biogas, wherein a gas containing the carbon dioxide supplied from the gas-capturing portion is used as a constituent component for the neutralizing raw material gas. 5 . The liquid fuel production system according to claim 2 , wherein the liquid fuel-synthesizing portion includes a water vapor separation membrane configured to cause at least water vapor to permeate therethrough, and the liquid fuel-synthesizing portion separates a permeation-side gas, which is a gas that has permeated through the water vapor separation membrane from a non-permeation side thereof to a permeation side thereof, and which contains water vapor that is a by-product of the conversion reaction, and a non-permeation-side gas, which is a gas that has been free from permeating through the water vapor separation membrane, and which contains the liquid fuel, the hydrogen and the carbon oxide that are unreacted, and the acidic by-product, from each other, wherein the liquid fuel production system further comprises a sweeping gas-supplying portion configured to supply a sweeping gas, which is a gas that sweeps the permeation-side gas, and which contains an amine compound, to the permeation side of the liquid fuel-synthesizing portion, and wherein the permeation-side gas and the sweeping gas that have flowed out of the liquid fuel-synthesizing portion are supplied to the mixing portion. 6 . The liquid fuel production system according to claim 5 , wherein the sweeping gas further contains a carbon oxide and/or hydrogen. 7 . The liquid fuel production system according to claim 5 , wherein a concentration of the amine compound in the sweeping gas is 10 ppm or more. 8 . The liquid fuel production system according to claim 3 , wherein the liquid fuel-synthesizing portion includes a water vapor separation membrane configured to cause at least water vapor and ammonia to permeate therethrough, and the liquid fuel-synthesizing portion separates a permeation-side gas, which is a gas that has permeated through the water vapor separation membrane from a non-permeation side thereof to a permeation side thereof, and which contains water vapor that is a by-product of the conversion reaction and the ammonia, and a non-permeation-side gas, which is a gas that has been free from permeating through the water vapor separation membrane, and which contains the liquid fuel, the hydrogen and the carbon oxide that are unreacted, and the acidic by-product, from each other, wherein the liquid fuel production system further comprises a sweeping gas-supplying portion configured to supply a sweeping gas, which sweeps the permeation-side gas, to the permeation side of the liquid fuel-synthesizing portion, and wherein the permeation-side gas and the sweeping gas that have flowed out of the liquid fuel-synthesizing portion are supplied to the mixing portion. 9 . The liquid fuel production system according to claim 8 , wherein a concentration of the ammonia in a mixed gas of the permeation-side gas and the sweeping gas is 10 ppm or more. 10 . The liquid fuel production system according to claim 2 , wherein the liquid fuel-synthesizing portion includes a liquid fuel separation membrane configured to cause at least a liquid fuel to permeate therethrough, and the liquid fuel-synthesizing portion separates a permeation-side gas, which is a gas that has permeated through the liquid fuel separation membrane from a non-permeation side thereof to a permeation side thereof, and which contains the liquid fuel, and a non-permeation-side gas, which is a gas that has been free from permeating through the liquid fuel separation membrane, and which contains water vapor that is a by-product of the conversion reaction, the hydrogen and the carbon oxide that are unreacted, and the acidic by-product, from each other, wherein the liquid fuel production system further comprises a sweeping gas-supplying portion configured to supply a sweeping gas, which is a gas that sweeps the permeation-side gas, and which contains an amine compound, to the permeation side of the liquid fuel-synthesizing portion, and wherein the sweeping gas that has flowed out of the liquid fuel-synthesizing portion is supplied to the mixing portion. 11 . The liquid fuel production system according to claim 10 , wherein the sweeping gas further contains a carbon oxide and/or hydrogen. 12 . The liquid fuel production system according to claim 10 , wherein a concentration of the amine compound in the sweeping gas is 10 ppm or more. 13 . The liquid fuel production system according to claim 3 , wherein the liquid fuel-synthesizing portion includes a liquid fuel separation membrane configured to cause at least a liquid fuel and ammonia to permeate therethrough, and the liquid fuel-synthesizing portion separates a permeation-side gas, which is a gas that has permeated through the liquid fuel separation membrane from a non-permeation side thereof to a permeation side thereof, and which contains the liquid fuel and the ammonia, and a non-permeation-side gas, which is a gas that has been free from permeating through the liquid fuel separation membrane, and which contains water vapor that is a by-product of the conversion reaction, the hydrogen and the carbon oxide that are unreacted, and the acidic by-product, from each other, wherein the liquid fuel production system further comprises a sweeping gas-supplying portion configured to supply a sweeping gas, which sweeps the permeation-side gas, to the permeation side of the liquid fuel-synthesizing portion, and wherein the permeation-side gas and the sweeping gas that have flowed out of the liquid fuel-synthesizing portion are supplied to the mixing portion. 14 . The liquid fuel production system according to claim 13 , wherein a concentration of the ammonia in a mixed gas of the permeation-side gas and the sweeping gas is 10 ppm or more. 15 . The liquid fuel production system according to claim 2 , wherein the liquid fuel-synthesizing portion includes a first gas flow
by diffusion · CPC title
by dialysis · CPC title
containing NH3 only (possibly in combination with NH4 salts) · CPC title
of acid contaminants, e.g. acid gas removal · CPC title
Removal of contaminants · CPC title
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