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ELECTROCHEMICAL PRODUCTION OF BUTANOL FROM CO2 and H2O

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ELECTROCHEMICAL PRODUCTION OF BUTANOL FROM CO2 and H2O ( electrochemical-production-butanol-from-co2-and-h2o )

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US 2012/0132538 A1 May 31,2012 output214may alsoincludeaportionofcatholyte.Generally, the second extractor 208 is suf?cient to provide a butanol product 216, i.e., the product of the tWo-stage process of system 200, and a butanol-lean portion 218 (i.e., a butanol lean/catholyte rich portion) from the second extractor 208 Whichmay beutiliZedforadditionalreactionsinthesecond cell204. [0044] Asdescribedherein,thepresentdisclosuremaybe implemented via a one-stage or a tWo-stage process. The one-stage process may result in a product stream including butanol With relatively larger amounts of one-, tWo-, and three-carbonproducts.The one-stageprocessmay beanelec trochemical process (e.g., driven by any electric poWer source) or a photochemical process, Which may occur on a photovoltaic solar panel. The tWo-stage process generally producesbutanolWithhighe?iciency. [0045] ReferringtoFIG.3,aHowdiagramofanexample method 300 for producing butanol from carbon dioxide and Water in a one-stage process is shoWn. The method (or pro cess)300generallycomprisesastep(orblock)302,astep(or block)304,astep(orblock)306,andastep(orblock)308. The method 300 may be implemented using the system 100. [0046] Inthestep302,Watermaybeintroducedtoa?rst compartment of an electrochemical cell. The ?rst compart ment may include an anode. Introducing carbon dioxide to a secondcompartmentoftheelectrochemicalcellmay beper formedinthestep304.The secondcompartmentmay include a solution of an electrolyte, a catalyst, and a cathode. In the step 306, an electric potential may be applied between the anode and the cathode in the electrochemical cell su?icient for the cathode to reduce the carbon dioxide to a product mixture.Separatingbutanolfromtheproductmixturemaybe performedinthestep308. [0047] ReferringtoFIG.4,aHowdiagramofanexample method 400 for producing butanol from carbon dioxide and Water in a tWo-stage process is shoWn. The method (or pro cess)400generallycomprisesastep(orblock)402,astep(or block)404,astep(orblock)406,astep(orblock)408,astep (orblock)410,andastep(orblock)412.Themethod400may beimplementedusingthesystem200. [0048] Inthestep402,Watermaybeintroducedtoa?rst compartment of a ?rst electrochemical cell. The ?rst com partment may include an anode. Introducing carbon dioxide to a second compartment ofthe ?rstelectrochemical cellmay be performed inthe step 404. The second compartment may include a solution of an electrolyte, a catalyst, and a cathode. Inthestep406,anelectricpotentialmay beappliedbetWeen the anode and the cathode in the ?rst electrochemical cell suf?cient for the cathode to reduce the carbon dioxide to an intermediateproductmixture.SeparatingatWo-carboninter mediate from the intermediate product mixture may be per formedinthestep408.Inthestep410,thetWo-carboninter mediatemay beintroducedtoasecondelectrochemicalcell. The second electrochemical cell may include an anode in a ?rst cell compartment and a cathode in a second cell com partment. The cathode may reduce the tWo-carbon interme diate to a product mixture. In the step 412, butanol may be separatedfromtheproductmixture. advantages.The formhereinbeforedescribedbeingmerely an explanatory embodiment thereof, itisthe intention ofthe folloWing claims to encompass and include such changes. What isclaimedis: 1.A methodforelectrochemicalproductionofbutanol, comprising: (A) introducing Water to a ?rst compartment of an electro chemical cell, said ?rst compartment including an anode; (B)introducingcarbondioxidetoasecondcompartmentof said electrochemical cell, said second compartment including a solution of an electrolyte, a catalyst, and a cathode; (C)applyinganelectricalpotentialbetWeensaidanodeand said cathode in said electrochemical cell su?icient for said cathode to reduce said carbon dioxide to a product mixture;and (D)separatingbutanolfromsaidproductmixture. 2.The method ofclaim 1,Wherein saidbutanol includes at least one of l-butanol or 2-butanol. 3. The method of claim 1, Wherein said product mixture includes butanol and at least one of formic acid, acetic acid, methanol,ethanol,acetone,orpropanol. 4.Themethodofclaim1,Whereinsaidsolutionofelectro lyteincludespotassiumchloride. 5. The method of claim 1, Where said catalyst includes at least one of imidaZole, pyridine, or a substituted variant of imidaZole or pyridine. 6.Themethodofclaim5,Whereinsaidcatalystincludesan approximately400mM concentrationofimidaZole. 7. The method of claim 1, Wherein said cathode includes a cathode material for reducing said carbon dioxide to said product mixture, said cathode material including stainless steel. 8.A methodforelectrochemicalproductionofbutanol, comprising: (A) introducing Water to a ?rst compartment of a ?rst electrochemical cel, said ?rst compartment including an anode; (B)introducingcarbondioxidetoasecondcompartmentof said?rstelectrochemicalcell,saidsecondcompartment including a solution of an electrolyte, a catalyst, and a cathode; (C)applyinganelectricalpotentialbetWeensaidanodeand said cathode in said ?rst electrochemical cell suf?cient for said cathode to reduce said carbon dioxide to an intermediateproductmixture; (D) separating a tWo-carbon intermediate from said inter mediateproductmixture; (E) introducing said tWo-carbon intermediate to a second electrochemical cell, Wherein (i) said second electro chemical cell including an anode in a ?rst cell compart ment and acathode ina second cellcompartment and (i) said cathode reducing said tWo-carbon intermediate to a productmixture;and (F)separatingbutanolfromsaidproductmixture. 9. The method of claim 8, Wherein said tWo-carbon inter [0049] Itisbelievedthatthepresentdisclosureandmanyof mediateincludesatleastoneofglyoxal,oxalicacid,glyoxy itsattendantadvantagesWillbeunderstoodbytheforegoing licacid,glycolicacid,aceticacid,oracetaldehyde. description, and itWill be apparent thatvarious changes may be made in the form, construction and arrangement of the components thereof Without departing from the scope and spiritofthedisclosureorWithoutsacri?cingallofitsmaterial trolyteincludespotassiumchloride. 10. The method of claim 9, Wherein said tWo-carbon inter mediate includes glyoxal. 11. The method of claim 8, Wherein said solution of elec

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