6228results about "Electrolytic organic production" patented technology

The invention belongs to the technical field of electrolysis CO2 reduction, and discloses an electrocatalytic reduction system for preparing ethylene through electrochemical reduction of carbon dioxide and application of the electrocatalytic reduction system. The electrocatalytic reduction system comprises a cathode, an anode and an electrolyte, wherein the cathode is prepared by uniformly mixing and dispersing a copper-based catalyst, liquid micromolecular alcohols and a Nafion solution to obtain slurry and then spraying the obtained slurry onto carbon paper; the electrolyte is KOH electrolyte containing a sucrose additive. The copper catalytic reaction interface is regulated and controlled through sucrose molecules, the enrichment concentration of reactants near the reaction interface and key intermediates generated by catalyzing C2H4 is remarkably improved, generation of C2H4 through subsequent C-C coupling reaction is promoted, the yield of C2H4 is remarkably improved, meanwhile, the raw material cost is low, and wide application prospects are achieved.

Provided herein are systems and methods for electrochemical COx reduction and hydrogen oxidation reactions to promote the reduction of carbon oxides (COx). Embodiments of the systems and methods may be used to produce carbon monoxide (CO) and water. In various embodiments, a reaction between carbon dioxide (CO2) and hydrogen gas (H2) occurs at the anode of a CO2 reduction electrolyzer, promoting the production of reduction products (e.g., CO). In some embodiments, the methods may utilize a feed stream of H2 gas from various sources. In some embodiments, a water electrolyzer upstream of the COx reduction electrolyzer is a source of H2 gas. In some embodiments, the systems and methods include downstream integration processes and related apparatus. In some embodiments, the downstream integration processes include Fischer-Tropsch processes.

The carbon dioxide recovery system (1) comprises an electrolytic reduction device (2) that generates a producer gas by reducing carbon dioxide, and a carbon dioxide separation device (3) that separates the carbon dioxide from the processed gas. The carbon dioxide separation device is provided with a first gas diffusion electrode (51), a second gas diffusion electrode (52), a liquid chamber (53) formed between the first gas diffusion electrode and the second gas diffusion electrode (52), and is configured to be supplied with an electrolytic liquid containing a compound that adsorbs and desorbs protons in an oxidation-reduction reaction, a first chamber (54) separated from the liquid chamber by the first gas diffusion electrode and configured to be supplied with the producer gas, and a second chamber (55) separated from the liquid chamber by the second gas diffusion electrode and through which the carbon dioxide separated from the producer gas flow. The electrolytic reduction device uses the carbon dioxide separated from the processed gas in the carbon dioxide separation device as a part of an input material thereof.

The invention relates to the technical field of catalysts, and discloses a preparation method and application of a copper-based metal-organic framework catalytic material.The preparation method comprises the following steps that S1, cuprous salt, N, N '-bis (5-aminonicotinyl) naphthalimide and a solvent are mixed, and a mixture is obtained; s2, heating the mixture to a reaction temperature, carrying out a constant-temperature reaction, and cooling to obtain a crystal; and S3, washing and drying the crystal to obtain the copper-based metal-organic framework catalytic material. According to the preparation method of the copper-based metal-organic framework catalytic material provided by the invention, N, N '-bis (5-aminonicotinyl) naphthalimide is used as an organic ligand to prepare the copper-based metal framework Cu-PTD with N / O co-coordination, and the copper-based metal framework Cu-PTD has relatively strong electrocatalytic carbon dioxide reduction and electron transfer capabilities; and the catalyst has relatively high selectivity on electrocatalytic carbon dioxide reduction products.

The invention discloses a seed layer induced FeCoNiCuMo high-entropy alloy nanocage electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing and reacting iron, cobalt and nickel precursors to prepare a FeCoNi nanocage catalyst as a seed layer; adding copper salt and molybdate into the seed layer solution, carrying out ultrasonic mixing, adding a pH regulator and a reducing agent, carrying out ultrasonic treatment, putting the mixed solution into liquid nitrogen, cooling, carrying out primary nucleation, naturally unfreezing, standing for nucleation, cleaning, and freeze-drying to obtain the high-entropy alloy nanocage electrocatalyst. The catalyst is used for preparing urea through CO2 and NO3 <-> electro-catalysis, can effectively adjust the matching of CO2 and NO3 <-> reaction kinetics, and has extremely high Faraday efficiency and yield for synthesizing urea through C-N coupling.

A process produces unsubstituted or at least monosubstituted α,ω-dicarboxylic acids or ketocarboxylic acids and unsubstituted or at least monosubstituted cycloalkanones by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or poly unsaturated cycloalkenes and unsubstituted or at least monosubstituted, saturated cycloaliphatic hydrocarbons in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.

The present invention relates to a process for preparing a carboxylic acid from a hydrolysable polymer containing the carboxylic acid, comprising at least the following process steps: i) depolymerizing the polymer by hydrolyzing the polymer in an aqueous hydrolysis solution to form a carboxylic acid salt and optionally at least one further monomer component of the polymer; ii) optionally removing other monomer components and any other soluble and / or insoluble impurities from the hydrolysate solution produced in process step i); iii) transferring the hydrolysate solution produced in process step ii) to the anode chamber of the electrolysis device; iv) electrolyzing in the anode chamber using the hydrolysate solution, the electrolyzing device having, in addition to the anode chamber, a cathode chamber filled with a liquid, by connecting the electrolyzing device to a voltage source, a current flowing through the electrolyzing device and ion exchange in the liquid between the anode chamber and the cathode chamber, whereby the liquid in the cathode chamber becomes alkaline, and the liquid in the anode chamber becomes alkaline; protons are formed in the anode chamber, so that carboxylate is protonated, and carboxylic acid is precipitated; and v) removing the formed carboxylic acid from at least part of the hydrolysate solution, in which vi) the liquid generated in the cathode chamber of the electrolysis device in the process step iv) is used as a component of the hydrolysate solution in step i).

The present disclosure relates to polymers synthesized from ionomers having an aromatic hydrocarbon-containing backbone and an amine-containing ionic or ionizable moiety with polystyrene. The linkage between the ionomer and the polystyrene is made through covalent bonds or linking moieties. Electrochemical cells having polymer electrolyte membranes composed of the combined polymers are also described.

The invention discloses a preparation method and application of amino-modified single-benzene-ring copper-based MOFs (metal organic frameworks), and the method comprises the following steps: dropwise adding a copper nitrate monohydrate solution into a diamino terephthalic acid solution, fully stirring to react, and centrifugally washing and drying the product to obtain the amino-modified single-benzene-ring copper-based MOFs. The amino-modified single-benzene-ring copper-based MOFs are used for electrocatalytic reduction of carbon dioxide. The prepared amino-modified single-benzene-ring copper-based MOFs have unique morphology, active sites can be exposed on the inner surface and the outer surface, the accessibility of the active sites is improved, and meanwhile the reaction mass transfer capacity is enhanced.

An atmospheric CO2 capture system includes a compartment housing a solid CO2 sorbent, an exchange fluid including a chemical component with selectivity towards CO2, and an electrochemical cell or mineralization reactor in fluid communication with the compartment, the system having a cycle including a first state of sorbing CO2 from incoming air onto the solid CO2 sorbent until a saturation point is reached; a second state of regenerating the sorbent by flooding the compartment with the exchange fluid to detach CO2 from the saturated sorbent and bind the detached CO2 to the chemical component; and a third state of regenerating the chemical component and utilizing the CO2 in the electrochemical cell or mineralization reactor.

An electrochemical reaction device 10 comprises: a first electrode 11; a second electrode 12; a first electrolysis unit 21 having the first electrode 11; a reaction unit 31; and a first connection path 41 connecting the first electrolysis unit 21 and the reaction unit 31. The first electrode 11 includes a first catalyst that promotes a reaction for reducing carbon dioxide to a first reduction product, and the second electrode 12 oxidizes a reduction product A of an oxidation-reduction substance to an oxide B. The first connection path 41 causes the first reduction product generated by the first electrolysis unit 21 to flow out to the reaction unit 31. The reaction unit 31 has a second catalyst for generating an organic substance by the first reduction product and the oxide B.

Herein discussed is a method of producing carbon monoxide or hydrogen or both simultaneously comprising: (a) providing an electrochemical reactor having an anode, a cathode, and a mixed-conducting membrane between the anode and the cathode; (b) introducing a first stream to the anode, wherein the first stream comprises a hydrocarbon; and (c) introducing a second stream to the cathode, wherein the second stream comprises carbon dioxide or water or both, wherein carbon monoxide is generated from carbon dioxide electrochemically and hydrogen is generated from water electrochemically.

The invention discloses a bimetallic composite catalyst of copper and rare earth, a preparation method of the bimetallic composite catalyst and application of the bimetallic composite catalyst in electrochemical reduction of carbon dioxide. The preparation method of the bimetallic composite catalyst comprises the following steps: mixing copper salt and rare earth metal salt in water, adding ammonium carbonate and inorganic alkali into the mixture, stirring and reacting, and centrifuging, washing and drying the mixed solution to obtain a catalyst precursor; calcining the catalyst precursor to obtain the bimetallic composite catalyst, the Cu and rare earth bimetallic compound catalyst has the advantages of high current density, high selectivity, good system stability and long service life when being used for electrically reducing CO2. The catalyst has rich active sites, has a large surface area, can be fully contacted with an electrolyte and CO2, and can overcome the limitation of substance transfer. Selective output of methane or multi-carbon products is efficiently achieved by regulating and controlling the molar ratio of copper to rare earth elements, the partial current density of methane and the multi-carbon products reaches the industrialization level, and the catalytic effect is excellent.

The invention discloses a method for enhancing the performance of methane synthesis through CO2 microbial electrochemical conversion based on quorum sensing, which comprises the following steps: adding an exogenous quorum sensing signal molecule octanoyl-L-homoserine lactone C8-HSL into a cathode chamber of a microbial electrolysis cell MEC, firstly inoculating an aqueous solution containing anaerobic microorganisms into the cathode chamber, and domesticating; forming a cathode biological membrane on the cathode electrode as a biological cathode; and then under the conditions that the cathode liquid in the cathode chamber is subjected to aeration of high-purity CO2 and quorum sensing signal molecules are added, a direct-current power supply provides external voltage to carry out a reaction for synthesizing methane by electrochemical conversion of CO2. According to the method for improving the performance of synthesizing methane from CO2 by adding the exogenous quorum sensing signal molecules into the culture medium of the microbial electrosynthesis system, the addition of the signal molecules not only can promote the growth of a biological membrane, improve the stability of the biological membrane and shorten the starting time of a reactor system, but also can directionally regulate and control florae and improve the abundance of the florae; meanwhile, the methane yield of the system is improved.

A preparation method for Ni and Mn bimetallic electrocatalyst and its application in small molecule electrooxidation are provided. The method includes the following steps: cleaning a matrix to remove a surface oxide layer; dissolving nickel salt, manganese salt, terephthalic acid, salicylic acid, and urea into a mixed solution of ethanol, DMF, and water and transferring to a hydrothermal reaction kettle together with the treated matrix for a hydrothermal reaction; then, obtaining a NiMn-MOF / NF precursor by cooling, cleaning, and drying. Dissolving and stirring sodium borohydride and selenium powder and transferring the above solution to the hydrothermal reaction kettle for hydrothermal selenization reaction with NiMn-MOF / NF; then, obtaining a self-supporting NiMn-MOF-Se catalyst with uniform nanosheet structure by cooling and cleaning. The catalyst synthesis method is simple and controllable, with low cost, uniform catalyst morphology, and good conductivity, it can be directly used as an electrode.

The invention discloses a preparation method and application of a carbon dioxide gas capture functional molecule modified nanogold catalyst. The preparation method comprises the following steps: synthesizing a modified molecule with a carbon dioxide gas capturing function through a chemical reaction; adding the modified molecules into an organic solvent, and uniformly mixing to obtain a solution; then adding a nanogold colloidal solution into the solution, uniformly stirring, and carrying out oil bath heating reaction; and after the reaction is completed, cooling to room temperature, carrying out suction filtration on the reaction liquid, respectively washing with ethanol and deionized water, and carrying out vacuum drying on the product to obtain the carbon dioxide gas capture functional molecule modified nanogold catalyst. In the electrocatalytic carbon dioxide reduction reaction process of the obtained catalyst, modification molecules are connected with the nanogold catalyst through chemical bonds, active sites of the nanogold catalyst are exposed, and meanwhile, an interface environment beneficial to the carbon dioxide reduction reaction can be provided; therefore, high activity, high selectivity and high stability of the molecular modified nanogold catalyst are realized.

To provide a methane manufacturing system that can reduce energy loss.SOLUTION: A system comprises a steam generating device 11 that generates steam, an electrolysis methanation device 12 that introduces a first gas mainly composed of carbon dioxide through a first pipe P1 and also introduces the steam generated in the steam generating device 11 through a second piping P2, causing electrolysis of the steam and the Sabatier reaction to produce a second gas mainly composed of methane and oxygen-containing steam that is steam containing oxygen, and sending the second gas to a third pipe P3 and the oxygen-containing steam to a fourth pipe P4. and a return pipe P5 that supplies the oxygen-containing steam sent to the fourth pipe P4 to at least one of the steam generating device 11 and the second pipe P2.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of organic electro-oxidation electrode materials, and particularly relates to a fullerene modified transition metal hydroxide nano array material as well as a preparation method and application thereof. A transition metal hydroxide nano array grows in situ on a current collector through solvothermal reaction, surface amino modification is achieved by means of grafting of a silane coupling agent with amino, and finally the transition metal hydroxide nano array material with the surface modified by fullerene is obtained through addition reaction of amino and fullerene carbon-carbon double bonds. The strong electron-withdrawing capability of the fullerene is beneficial to optimizing the surface electron structure of the material, so that the intrinsic catalytic activity is improved; meanwhile, fullerene can promote adsorption and enrichment of an organic substrate on the surface of the material through a conjugated pi bond, a hydrophobic effect and the like, so that the mass transfer efficiency is improved. Benefited from the lifting mechanism, the obtained nano array material has the advantages of high electrocatalytic activity and high mass transfer efficiency, and can be widely applied to a series of organic electrooxidation reactions.

The invention discloses a method for synthesizing 2, 3-dichloropyridine through electrochemical dechlorination, which comprises the following steps of: adopting a diaphragm electrolytic tank, taking a noble metal element modified material as a cathode, taking a chemical inert material as an anode, taking a solution containing 2, 3, 6-trichloropyridine as a catholyte, taking an aqueous solution of sulfuric acid or hydrochloric acid as an anolyte, and enabling current to pass through the solution containing 2, 3, 6-trichloropyridine from the anode to the cathode, the method comprises the following steps: preparing a solution containing 2, 3, 6-trichloropyridine, performing electrolytic reduction and dechlorination on the 2, 3, 6-trichloropyridine in the solution to obtain 2, 3-dichloropyridine, and recovering the 2, 3-dichloropyridine after electrolysis is finished. According to the method, the reaction temperature is reduced from 140 DEG C to room temperature or the reaction pressure is reduced from 3MPa to normal pressure; the use of hydrogen is avoided; and the yield of the target product is increased by 5-10%.

Hydrogenation reactions are catalyzed by driving charged particles (e.g., an electric current or particle beam) into and / or through a catalytic material so as to deliver energy for hydrogenation of one or more compounds chemisorbed by the catalytic material. The energy provided by the charged particles may be adjusted (e.g., based on a measured temperature and / or pressure associated with the reaction) to maintain a desired reaction temperature and / or prevent overheating of the reaction. In one example, hydrogen loading of the catalytic material (e.g., via electrolysis) enhances reaction rates. A wide variety of organic and inorganic reactants are contemplated for applications in food, energy production and storage (e.g., fossil-fuels, bio-fuels, petrochemicals, fuel cells), pharmaceuticals and other chemicals, as well as environmental applications (e.g., wastewater treatment, emissions reduction, carbon capture and sequestration).

The invention relates to a preparation method and application of a sandwich-structured gas diffusion electrode, and belongs to the fields of electrochemical catalysis, carbon dioxide utilization and renewable energy sources. According to the preparation method, a catalyst layer, a cation layer and a protective layer are prepared on a gas diffusion substrate in a layered manner; the catalytic layer, the cation layer and the protective layer respectively play roles in catalyzing CO2 reduction, adjusting the microenvironment, preventing cation leakage and the like. When applied, the sandwich-structured gas diffusion electrode GDE prepared by the method can be assembled on electrochemical carbon dioxide reduction modules such as a flow battery and a membrane electrode assembly (MEA) to carry out electrochemical reduction reaction of CO2, has high activity and high stability, and can avoid adding inorganic alkali metal cations into catholyte to inhibit hydrogen evolution side reaction. Based on the invention, GDE can be prepared through a microenvironment engineering means, and the performance of the electrochemical reduction reaction of carbon dioxide is improved.

The invention relates to the technical field of electrochemical carbon dioxide reduction reaction catalysts, and discloses a preparation method and application of a mixed ionomer modified cuprous oxide catalyst, a hydrophobic ionomer and a proton exchange ionomer are used for performing surface modification on cuprous oxide powder, an effective hydrophobic structure is constructed on a Cu2O active site in a physical coating form, and the cuprous oxide modified cuprous oxide catalyst is prepared. A stable and controllable hydrophobic gas-liquid-solid three-phase reaction micro-interface is formed, so that the problems of low C-2 Faraday efficiency, poor selectivity, serious competitive hydrogen evolution reaction, carbonate deposition and the like in the existing process of preparing a C-2 product by electrocatalytic carbon dioxide reduction are solved, and the industrial current density (gt; and the method has the advantages of simple process flow, low price, high product selectivity and the like.

A process produces aliphatic monocarboxylic acids and α,ω-dicarboxylic acids or α,ω-dicarboxylic monoesters by electrochemical oxidation of unsubstituted or at least monosubstituted, monounsaturated or polyunsaturated fatty acids or fatty acid esters in the presence of an inorganic or organic nitrate salt in an electrolysis cell in a reaction medium in the presence of oxygen.

The invention relates to the technical field of organic chemistry and environmental science, in particular to a fluorine-philic and hydrophobic functional monomer, a synthesis method and application thereof, a fluorine-containing compound detection electrode based on the functional monomer and a preparation method of the fluorine-containing compound detection electrode. The chemical structure of the fluorine-philic and hydrophobic functional monomer comprises pyrrole-3-carboxylic acid and fluorine telomer alcohol bonded with the pyrrole-3-carboxylic acid. A long fluorocarbon chain is introduced into a basic functional monomer, so that the fluorine affinity and hydrophobicity of the monomer to a fluorine-containing compound are remarkably improved. Therefore, a derivative pyrrole-3-carboxylic acid of pyrrole is used as a basic functional monomer, and the fluorine telomeric alcohol is bonded on the pyrrole-3-carboxylic acid, so that a novel functional monomer with fluorine-philic and hydrophobic functions is synthesized. The functional monomer realizes specific capture of fluorine-containing organic matter molecules by simultaneously utilizing amido with affinity to perfluorinated compounds in a pyrrole ring and unique fluorine-fluorine interaction force. A perfluorinated compound detection method established based on the functional monomer can avoid interference caused by a sample matrix.

The invention provides a preparation method of a copper-iron bimetallic monatomic catalyst taking cerium oxide as a substrate, which comprises the following steps: firstly, preparing a cerium oxide precursor by a hydrothermal method, then introducing oxygen vacancies into the precursor by Joule heating, and finally inducing metal atoms to be anchored on the surface of cerium oxide by a wet chemical impregnation and high-temperature calcination method, thereby obtaining the copper-iron bimetallic monatomic catalyst taking cerium oxide as the substrate. The prepared catalyst is used for synthesizing urea through electrocatalytic reduction of nitrate radicals, and the urea yield is excellent. The invention provides an effective way for development of an electrocatalytic reduction and urea C-N coupling system, and has application potential in the aspect of producing high-value chemical urea while solving nitrate pollution.

The invention relates to a preparation method of a copper-doped carbon nitride nano composite material and application of the copper-doped carbon nitride nano composite material in electrocatalytic carbon dioxide reduction. The preparation method comprises the following steps: firstly, preparing a carbon nitride precursor, taking salt of metal copper as a source of the metal copper to obtain a copper-doped carbon nitride nano composite material, and applying the copper-doped carbon nitride nano composite material to electrocatalytic reduction of carbon dioxide to obtain ethanol. Results show that in a wide voltage range, the catalytic performance of the catalyst is obviously improved, which is mainly characterized in that lamellar graphite carbon nitride is used as a substrate, existence of pyridine nitrogen is beneficial to activation of carbon dioxide to generate CO *, copper in a monatomic form can promote a C-C coupling process, and then a multi-carbon product ethanol is generated; and the lamellar morphology can utilize catalytic active sites to the greatest extent, so that the catalytic performance is greatly improved.

The invention relates to an electrode and a membrane electrode assembly for a zero-gap electrolyzer, a zero-gap electrolyzer, the use of a metal phthalocyanine, and a method for producing an electrode. An electrode (1, 1a, 1b) for a zero-gap electrolyzer (11) comprises a metal phthalocyanine (4). In this way, a particularly effective and cost-efficient catalyst can be provided.

The invention discloses a method for producing ethanol through electrocatalytic reduction of carbon dioxide and membrane coupling, and belongs to the technical field of electrochemical reduction and membrane separation coupling. After the alcohol-permeable membrane is arranged in the electrolytic tank, the selectivity of the alcohol-permeable membrane is utilized to separate the liquid-phase product ethanol and remove the product, so that the chemical equilibrium can be promoted to proceed forwards, the electrochemical reaction is promoted, the selectivity and the overall conversion efficiency of the reaction are improved, and the high-purity ethanol can be obtained; the device for preparing ethanol through electroreduction is scientific and reasonable in structure, safe and convenient to use, low in cost and short in treatment flow, and the selectivity of ethanol in the reaction process and the collection process is improved.

Carbon oxide electrolyzers may be characterized by: (a) a membrane electrode assembly (MEA) comprising a cathode layer, an anode layer, and one or more polymeric electrolyte layers between and in contact with the cathode layer and the anode layer; (b) a porous transport layer (PTL) proximate the anode layer, and (c) optionally, a microporous layer (MPL) disposed between the MEA and the PTL.

The invention provides a copper-nickel alloy catalytic electrode and a preparation method and application thereof. The copper-nickel alloy catalytic electrode comprises a foamed nickel substrate and a copper-nickel alloy vertically loaded on the surface of the foamed nickel substrate, the molecular formula of the copper-nickel alloy is Cu < 0.81 > Ni < 0.19 >, and the copper-nickel alloy is of a dendritic nanostructure. The preparation method comprises the following steps: adding copper sulfate, nickel sulfate and ammonium sulfate into water, and uniformly stirring to obtain an electrolyte; taking a foamed nickel substrate as a working electrode, taking a saturated silver-silver chloride electrode as a reference electrode, taking a platinum sheet or a graphite rod electrode as a counter electrode, and applying constant current density to the working electrode to obtain a preset electrode; and alternately cleaning the preset electrode by using ethanol and distilled water, and carrying out vacuum drying to obtain the copper-nickel alloy catalytic electrode. According to the prepared copper-nickel alloy catalytic electrode, the copper-nickel alloy is in a dendritic morphology, has abundant active sites and a high specific surface area, and has excellent catalytic activity and stability in hydrogen preparation by coupling hydrogen evolution reaction for synthesizing adipic acid through electro-catalysis of cyclohexanone.