# US 2026/0249235 A1 · Integration of ethanol production with co2 compression and dehydration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0249235 A1 - Document ID: US20260249235A1 - Status: Published application - Kind: A1 - Application number: 19/544,149 - Filed: 2026-02-19 - Published: 2026-08-27 - Earliest claimed: 2025-02-26 - Assignees: POET Research, Inc. - Applicants: POET Research, Inc. - Inventors: David Charles Carlson - Web page: https://patentgrep.com/patent/US20260249235A1 ## CPC - B01D 53/18: Absorbing units; Liquid distributors therefor (B01D3/16, B01D3/26, B01D3/30 take precedence; packing elements B01J19/30, B01J19/32) - B01D 53/263: {by absorption} - C12F 3/04: Recovery of volatile fermentation products from carbon dioxide - C12P 7/06: Ethanol, i.e. non-beverage - B01D 2252/2023: Glycols, diols or their derivatives - B01D 2256/22: Carbon dioxide - B01D 2257/704: Solvents not covered by groups B01D2257/702 - B01D2257/7027 - B01D 2257/80: Water - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C12F: RECOVERY OF BY-PRODUCTS OF FERMENTED SOLUTIONS (removal of yeast from wine or sparkling wine C12G1/08); DENATURED ALCOHOL; PREPARATION THEREOF - C12P: FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {(brewing of beer C12C; producing vinegar C12J; producing specific peptides or proteins C07K; producing enzymes C12N9/00; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification C12N15/00; measuring or testing processes involving enzymes or microorganisms C12Q; measuring or testing processes involving nucleic acid amplification reactions C12Q1/6844; fermentation processes to form a food composition, A21 or A23; compounds in general, see the relevant compound class, e.g. C01, C07)} ## Abstract Systems and methods of integrating gas from a fermentation system with a carbon dioxide compression and dehydration system. ## Claims ### Claim 1 A method comprising: supplying a feed gas to a carbon dioxide compression and dehydration process, wherein the feed gas comprises carbon dioxide, ethanol, and moisture, wherein the feed gas is derived from fermenting a fermentable composition; and separating a liquid from the carbon dioxide compression and dehydration process, wherein the liquid comprises ethanol, wherein the ethanol is present in an amount of at least 10% by weight of the liquid. ### Claim 2 (depends on 1) The method of claim 1, wherein the ethanol is present in an amount of at least 20% by weight of the liquid. ### Claim 3 (depends on 1) The method of claim 1, wherein the ethanol is present in an amount of at least 30% by weight of the liquid. ### Claim 4 (depends on 1) The method of claim 1, wherein the ethanol is present in an amount of at least 70% by weight of the liquid. ### Claim 5 (depends on 1) The method of claim 1, wherein the ethanol is present in an amount of at least 90% by weight of the liquid. ### Claim 6 (depends on 1) The method of claim 1, wherein separating a liquid from the carbon dioxide compression and refrigeration-based dehydration process comprises: compressing the feed gas to form a compressed gas having a pressure of at least 300 psig; cooling the compressed gas to condense at least a portion of water and ethanol present in the compressed gas to form the liquid, and separating the liquid from the compressed gas. ### Claim 7 (depends on 1) The method of claim 1, wherein the feed gas comprises raw gas or scrubbed gas. ### Claim 8 A method comprising: supplying a feed gas to a carbon dioxide compression and refrigeration-based dehydration process, wherein the feed gas comprises carbon dioxide, ethanol, and moisture, wherein the feed gas is derived from fermenting a fermentable composition, wherein the feed gas has a concentration of ethanol of more than 0.2 mole percent; compressing the feed gas, or a gas derived from the feed gas, to form a compressed gas having a pressure of at least 500 psig; and supplying the compressed gas to a refrigeration-based dehydration system. ### Claim 9 (depends on 8) The method of claim 8, further comprising separating a liquid from the refrigeration-based dehydration system and/or downstream from the refrigeration-based dehydration system, wherein the liquid comprises ethanol. ### Claim 10 (depends on 8) The method of claim 8, wherein the feed gas has a concentration of ethanol of more than 1 mole percent. ### Claim 11 (depends on 8) The method of claim 8, wherein the feed gas has a concentration of ethanol of more than 2 mole percent. ### Claim 12 (depends on 1) The method of claim 1, wherein the feed gas comprises raw gas or scrubbed gas. ### Claim 13 A method comprising: supplying a raw gas to a carbon dioxide scrubbing process to form a scrubbed gas, wherein the raw gas comprises carbon dioxide, ethanol, and moisture, wherein the raw gas is derived from fermenting a fermentable composition, and wherein the scrubbed gas comprises a target ethanol concentration; supplying the scrubbed gas to a carbon dioxide compression and refrigeration-based dehydration process, compressing the scrubbed gas, or a gas derived from the scrubbed gas, to form a compressed gas, supplying the compressed gas to a refrigeration-based dehydration system, wherein the compressed gas comprises ethanol, and wherein the target ethanol concentration is based on a thermodynamic hydrate inhibitor (THI) value of the ethanol in the compressed gas. ### Claim 14 (depends on 13) The method of claim 13, wherein the scrubbing process comprises supplying the raw gas to a water contacting column with a mass ratio of fresh water to carbon dioxide of less than 0.3. ### Claim 15 (depends on 13) The method of claim 13, wherein the scrubbing process comprises supplying the raw gas to a water contacting column with a mass ratio of fresh water to carbon dioxide of less than 0.2. ### Claim 16 (depends on 13) The method of claim 13, wherein the scrubbing process comprises supplying the raw gas to a water contacting column with a mass ratio of fresh water to carbon dioxide of less than 0.1. ### Claim 17 (depends on 13) The method of claim 13, further comprising separating a liquid from the refrigeration-based dehydration system and/or downstream from the refrigeration-based dehydration system, wherein the liquid comprises ethanol. ### Claim 18 (depends on 13) The method of claim 13, further comprising separating a liquid from the scrubbing process, wherein the liquid comprises ethanol.