1329results about "Carbon monoxide" patented technology

The invention discloses a capacity configuration optimization method for preparing methanol by coupling wind-solar hydrogen production with biomass gasification, belongs to the field of methanol preparation, and develops a comprehensive optimization framework to evaluate the technical economic feasibility of renewable methanol production. According to the framework, renewable energy power generation, an energy storage technology, hydrogen production through water electrolysis and methanol synthesis are integrated together, so that a production system with cost effectiveness is constructed. And establishing an optimization model to determine the optimal investment and operation strategy of green methanol production. According to the model, investment and operation decisions of a plurality of system components are considered, and a series of decision variables are set. Through the solution of the optimization model, the problem of insufficient economic evaluation and comparison technology of synthesizing methanol from renewable energy sources is solved, a scientific basis is provided for a project in planning, design and decision-making stages, and the development of the field of synthesizing methanol from renewable energy sources is promoted.

An article for joule heating is described, including a three-dimensional substrate on and / or in which a pyrolyzate of a phenolic resin or polymer forms an electrically conductive carbon network. Such articles may be incorporated in structured materials applications, which may include support, sorbent, and or catalyst components. Also described are methods of fabricating such articles and structured materials, and apparatus comprising same, and methods of use of such articles and structured materials and apparatus for conducting material transformation processes requiring input of heat for their performance, such as CO2 adsorption, methane pyrolysis for hydrogen and carbon production, hydrogen-assisted conversion of CO2 to hydrocarbons, including catalytic conversion of CO2 to olefins, catalytic conversion of CO2 to propane (liquefied petroleum gas), and catalytic conversion of CO2 to renewable natural gas, reverse water gas shift reaction, steam ethane cracking, propane cracking, steam methane reforming, and dry methane reforming.

A method for Carbon Dioxide (CO2) production comprising producing super-heated steam, utilizing a small modular nuclear reactor power plant system, receiving Sodium Formate (HCOONa) into a first reaction chamber, the first reaction chamber receiving a first portion of the super-heated steam at a first temperature, decomposing the Sodium Formate (HCOONa) into Sodium Oxalate ((COO)2Na2) and Hydrogen (H2), receiving the Sodium Oxalate ((COO)2Na2) into a second reaction chamber, the second reaction chamber receiving a second portion of the super-heated steam at a second temperature, decomposing the Sodium Oxalate ((COO)2Na2) into Sodium Oxide (Na2O), Carbon Monoxide (CO), and Carbon Dioxide (CO2).

The invention discloses preparation of a high-performance carbon matrix embedded iron-based catalyst based on a metal organic framework precursor and application of the high-performance carbon matrix embedded iron-based catalyst in reverse water-gas shift reaction. In the preparation process, commercially available 1, 3, 5-trimesic acid iron (the chemical formula is C9H3FeO6, abbreviated as Fe-BTC) is selected as a raw material, pyrolysis treatment is carried out in an argon atmosphere, then air passivation is carried out, and finally the high-performance carbon matrix embedded iron-based catalyst based on the metal organic framework precursor is successfully prepared. The MOF-600 has excellent performance in many catalysts, the carbon dioxide production rate reaches 24.0 mmol CO.gcat <-1 >. S <-1 > at the temperature of 400 DEG C in a reverse water gas shift reaction, the performance is remarkably superior to that of an existing non-noble metal catalyst, and extremely high catalytic efficiency and application potential are shown.

The invention discloses a monatomic catalyst capable of retaining surface defects of a catalyst as well as a preparation method and application of the monatomic catalyst, and belongs to the field of catalysis. The monatomic catalyst comprises an active metal component, a doping element and a carrier, the carrier is a semiconductor material rich in surface defects. The preparation method adopts a light-induced migration-conversion strategy. The monatomic catalyst which is obtained by the preparation method and retains the surface defects of the semiconductor material is applied to the fields of photocatalysis, thermocatalysis and electrocatalysis, and shows excellent performance.

The invention discloses a lanthanum-doped CuMgAl catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the lanthanum-doped CuMgAl catalyst comprises the following steps: adding a copper salt, a magnesium salt, an aluminum salt and a lanthanum salt into water to obtain a first solution; adding a precipitator into water to obtain a second solution; adding the second solution into the first solution to adjust the pH value to 10.5 to obtain a mixed solution, stirring the mixed solution to generate a co-precipitation reaction, after the reaction is completed, carrying out aging treatment to promote growth and structure ordering of layered double hydroxide crystals, and then carrying out calcination treatment to convert a layered double hydroxide precursor into an oxide, thereby obtaining the layered double hydroxide. And the lanthanum-doped CuMgAl catalyst is obtained. The lanthanum-doped CuMgAl catalyst prepared by the preparation method disclosed by the invention has excellent activity and stability.

The invention relates to the technical field of catalysts, in particular to a plasma silver nanocluster coated mesoporous molecular sieve TS-1 photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1, synthesizing mesoporous molecular sieve TS-1 powder; and 2, mixing the mesoporous molecular sieve TS-1 and CH3OH to prepare a suspension, injecting an AgNO3 aqueous solution into the suspension, and carrying out ultraviolet irradiation, filtration, washing and freeze drying to obtain the plasma silver nanocluster coated mesoporous molecular sieve TS-1 photocatalyst. The obtained electron-rich Ag cluster / mTS-1 shows an Ag-Ag coordination number (CN = 2.0 + / -0.1) lower than that of a mesoporous molecular sieve TS-1 (CN = 2.9 + / -0.2) loaded with Ag nanoparticles, so that the electron-rich Ag cluster / mTS-1 has higher CO2 adsorption and activation performance. In addition, the silver nanoclusters are firmly anchored on the surface of the mesoporous molecular sieve TS-1, so that the mesoporous molecular sieve TS-1 has high stability, and therefore, the mesoporous molecular sieve TS-1 shows high-stability CO2-to-CO photocatalytic conversion activity under simulated sunlight irradiation, and the yield of CO within 4 hours is 350 [mu] mol g <-1 >.

The invention provides a system and a method for co-production of synthesis gas with adjustable and controllable hydrogen-carbon ratio through carbonate reduction refining. The system comprises a hydrogen supply unit, a carbonate feeding unit and a carbonate fluidization hydrogenation reactor, the carbonate fluidization hydrogenation reactor comprises a first reaction chamber, a second reaction chamber and a cyclone separation unit; according to the system and the method for co-producing the synthesis gas with the adjustable hydrogen-carbon ratio through carbonate reduction refining, the reaction intensity of the first reaction cavity and the second reaction cavity of the carbonate fluidization hydrogenation reactor is adjusted and controlled, so that the hydrogen-carbon ratio in the product synthesis gas at the synthesis gas discharge hole can be accurately controlled; and proper reaction raw materials are directly provided for chemical synthesis of a series of subsequent high-added-value carbon derivatives.

The invention relates to a method for preparing carbon monoxide by reverse water gas shift, which comprises the following steps: under the catalytic action of a supported catalyst, carrying out reverse water gas shift reaction, carrying out pressure swing adsorption treatment on mixed gas generated in the reaction process, and desorbing to obtain carbon monoxide. By coupling the reverse water gas shift reaction and the pressure swing adsorption process and exerting the synergistic effect of the reverse water gas shift reaction and the pressure swing adsorption process, efficient and rapid separation of carbon monoxide is realized, the reverse water gas shift reaction is promoted to be carried out in the forward direction, the reaction requirement of reverse water gas shift is reduced, the reverse water gas shift reaction is carried out under relatively mild conditions, and the reaction efficiency is improved. The long-period efficient conversion of carbon dioxide is realized, and the conversion rate of carbon dioxide and the selectivity of carbon monoxide are further improved.

The invention provides a Ce-doped Cu and Zn-Al layered bimetallic oxide catalyst for reverse water gas shift and a preparation method thereof, the catalyst is composed of ZnO, Al2O3, CuO and CeO2, and the mass ratio of ZnO to Al2O3 to CuO to CeO2 is (71-78): (12-15): (5-6): (2-11). According to the preparation method, CeO2 is selected to be doped in layered bimetallic oxide (LDO) formed by calcining Cu-LDH, and compared with TiO2 doping, it is found that CeO2 has a more remarkable catalytic effect compared with TiO2, and the prepared catalyst has excellent stability and can maintain high activity under long-time testing; and the catalyst has CO yield close to equilibrium yield under the condition of relatively low catalytic temperature (450 DEG C), has excellent industrial implementation conversion prospect, and is simple in process steps and suitable for continuous production.

The application provides a reverse water gas shift catalyst, a preparation method and application thereof, and the reverse water gas shift catalyst prepared by the preparation method has excellent catalytic activity and high CO selectivity in a reverse water gas shift reaction. The preparation method comprises the following steps: contacting a precipitating salt solution with a precipitant aqueous solution and performing co-precipitation, and simultaneously controlling the reaction temperature to be 40-80 DEG C and the pH to be 6-8; optionally performing aging after the co-precipitation is completed; filtering the obtained precipitate to obtain a filter cake, washing the filter cake, then drying the filter cake, and calcining the filter cake at 300-500 DEG C to obtain the reverse water gas shift catalyst; wherein the precipitating salt solution is a mixed aqueous solution of a soluble salt of divalent metal ions and a soluble salt of trivalent metal ions, the divalent metal ions are selected from divalent ions of Mg and / or Zn, and the trivalent metal ions are selected from trivalent ions of Al, In and / or Ga.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a manganese ferrite / bismuth tungstate heterojunction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) dissolving sodium tungstate dihydrate, bismuth nitrate pentahydrate and hexadecyl trimethyl ammonium bromide in deionized water, and obtaining bismuth tungstate by using a hydrothermal method; 2) dissolving ferric chloride hexahydrate and manganese chloride tetrahydrate in water, then adding a sodium hydroxide solution, and obtaining manganese ferrite by using a hydrothermal method; and 3) dissolving bismuth tungstate and manganese ferrite into a sodium hydroxide solution, stirring, and drying to obtain the manganese ferrite / bismuth tungstate heterojunction photocatalyst. The formation of the heterojunction can greatly improve the activity of the manganese ferrite / bismuth tungstate in photocatalytic reduction of carbon dioxide.

An integrated energy system comprising a power plant including at least one nuclear reactor and an electrical power generation system a syngas generation system operably coupled to the power plant, the syngas generation system comprising a first reaction chamber configured to receive Sodium Formate (HCOONa), and a second reaction chamber configured to receive Sodium Oxalate ((COO)2Na2), and a methanol generation system operably coupled to the syngas generation system.

The invention discloses a COFs (Covalent Organic Frameworks)-based photocatalytic material with an improved structure as well as a preparation method and application of the COFs-based photocatalytic material. The covalent organic framework-based photocatalytic material with the anti-protein structure is obtained by taking silicon dioxide photonic crystal microbeads as a template and 4, 4 '-biphenyl dinitrile as a template, carrying out in-situ polymerization on the 4, 4'-biphenyl dinitrile in confinement pores in the silicon dioxide photonic crystal microbeads and then etching silicon dioxide. The preparation method comprises the following steps: (1) adding a catalyst into a 4, 4 '-biphenyl dinitrile monomer, then adding silicon dioxide photonic crystal microbeads, and carrying out a polymerization reaction; and (2) etching the silicon dioxide to obtain the covalent organic framework-based photocatalytic material with the inverse opal structure. The COFs material and the inverse opal structure are combined, so that the photocatalytic activity of the material is remarkably enhanced, and efficient and selective conversion of CO2 is promoted.

The invention provides a biomass gasification coupling iron ore powder reduction device and method with CO2 circulation, and relates to the technical field of direct reduction of iron from biomass gasification products. The biomass gasification coupling iron ore powder reduction device with CO2 circulation comprises a biomass gasification reaction device and a circulating fluidized bed reduction reaction device. The method comprises a method of a biomass gasification reaction device and a method of a circulating fluidized bed reduction reaction device. Through structural arrangement and application of the biomass gasification reaction device and the circulating fluidized bed reduction reaction device, CO2 gas circulation, zero carbon emission and high-purity iron raw material efficient utilization preparation can be achieved; the preparation method is simple and easy to operate, green and environment-friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

The invention discloses an iron oxide-iron cluster catalyst for a reverse water gas shift reaction and preparation of the iron oxide-iron cluster catalyst. The catalyst is a double-site material Fe2O3-Fe4 / C of carbon-loaded iron oxide particles and iron clusters. The preparation method comprises the following steps: firstly, synthesizing an NH2-MIL-88B (Fe) material through a solvothermal method, then grinding and uniformly mixing the NH2-MIL-88B (Fe) material with KCl, feeding the mixture into a tubular furnace for high-temperature calcination, and washing after cooling to obtain the MOFs-derived double-site catalyst, namely Fe2O3-Fe4 / C. The MOFs-derived Fe2O3-Fe4 / C double-site catalyst prepared by the invention is low in cost and simple and convenient in process, and when the MOFs-derived Fe2O3-Fe4 / C double-site catalyst is applied to a low-temperature catalytic reverse water-gas shift reaction, the CO2 conversion rate and the CO space-time yield are greatly improved, and the industrial application potential is huge.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a graphite-phase carbon nitride / iron-doped bismuth oxychloride heterojunction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, putting urea into a crucible with a cover, and calcining in air by utilizing a thermal polymerization method to obtain graphite-phase carbon nitride; then uniformly dispersing the graphite phase carbon nitride into a mannitol solution in which bismuth nitrate pentahydrate is dissolved, then adding ferric nitrate nonahydrate and potassium chloride into the solution, and obtaining the graphite phase carbon nitride / iron-doped bismuth oxychloride heterojunction photocatalyst by utilizing a hydrothermal method. The formation of the heterojunction can greatly improve the activity of the graphite-phase carbon nitride in photocatalytic reduction of carbon dioxide.

A method of reducing carbon dioxide, with a catalyst including silver, copper, and melamine, where the catalyst includes 1-20 wt. % silver based on a weight of the copper, where particles of the catalyst have a polygonal shape and an average size of 0.5-3 μm, and where the copper and the silver form a complex with the melamine.

A process for the production of carbon monoxide is described. The process involves the electrochemical desorption of carbon dioxide and oxygen from a solution containing a metal bicarbonate and the formation of carbon monoxide from the carbon dioxide. The carbon monoxide produced can be used in a process for the formation of syngas.

The invention relates to a combustion optimization and cryogenic separation-based carbon dioxide enrichment and hydrogen production synergy process for a combined device, which is characterized in that regeneration of a spent catalyst in a catalytic cracking device is changed into pure oxygen incomplete combustion, and circulating carbon dioxide is used for stabilizing fluidization and controlling tail combustion. And after the regenerated flue gas is subjected to deep purification and cryogenic separation, the part rich in carbon monoxide is fed into a medium-temperature change reactor of the steam hydrocarbon reforming device for hydrogen production, so that resource upgrading of catalytic coke is realized. And compressing and cooling the part rich in carbon dioxide to obtain about 98% of liquid phase product for subsequent application. According to the catalytic cracking device, only the regenerator needs to be adjusted, the deep purification and compression cryogenic separation unit is additionally arranged, the hydrogen production device can improve the treatment capacity of the medium-temperature change reactor, implementation is convenient, and the catalytic cracking device is suitable for new and old devices. The invention further relates to a system for carbon dioxide enrichment and hydrogen production synergy of the integrated device based on combustion optimization and cryogenic separation.

The invention discloses a preparation method of a nano-porous CeO2 catalyst, and the preparation method of the nano-porous CeO2 catalyst comprises the following steps: S1, adding a cerium source into deionized water, and dissolving to obtain a cerium-containing aqueous solution; s2, adding a mixed solvent into the obtained cerium-containing aqueous solution, and uniformly stirring to obtain a mixed solution; s3, putting the obtained mixed solution into a reaction kettle for hydrothermal reaction, after the reaction is finished, centrifugally washing to obtain a solid substance, and then sequentially drying, conventionally grinding and calcining the obtained solid substance at high temperature to obtain the nano-porous CeO2 catalyst. The invention also provides a nano-porous CeO2 catalyst, and an application of the nano-porous CeO2 catalyst. Compared with the prior art, the preparation method of the nano-porous CeO2 catalyst has the advantages that the operation is simple, and the prepared nano-porous CeO2 catalyst has a good catalytic conversion effect on VOCs (Volatile Organic Compounds) and the like.

The invention provides a ruthenium-based carbon dioxide hydrogenation catalyst based on MoS2 as well as a preparation method and application of the ruthenium-based carbon dioxide hydrogenation catalyst. The carbon dioxide hydrogenation catalyst comprises silicon dioxide, ruthenium and molybdenum disulfide, and the ruthenium and the molybdenum disulfide are loaded on the silicon dioxide. Therefore, in the carbon dioxide hydrogenation catalyst, the molybdenum disulfide is used as an auxiliary agent, so that the generation of methane (CH4) can be remarkably inhibited while a high CO2 conversion rate is maintained, the reversion of a product from CH4 leading to carbon monoxide (CO) leading is realized, and the inherent core defects that an existing Ru-based CO2 hydrogenation catalyst is too high in methanation activity, low in CO selectivity and difficult to consider activity-selectivity at the same time are overcome.

The invention belongs to the technical field of catalysts, and particularly relates to a metal-covalent organic framework photocatalyst for photocatalytic CO2 reduction as well as a preparation method and application of the metal-covalent organic framework photocatalyst. According to the invention, a novel covalent organic framework material with symmetrical metal ion coordination is firstly synthesized, and the covalent organic framework material is found to have obviously higher performance for photocatalytic CO2 reduction compared with a single COF (Covalent Organic Framework). The invention further designs and synthesizes a covalent organic framework material with asymmetric metal ion coordination, and finds that the photocatalytic CO2 reduction performance of the covalent organic framework material is far better than that of a covalent organic framework material with symmetric coordination, so that an original solution can be provided for designing a new generation of high-performance and low-cost artificial photosynthesis catalyst.

This invention discloses a method for preparing a nitrogen-doped titanium dioxide and carbon hollow sphere heterojunction photocatalyst, comprising the following steps: 1) preparing a carbon hollow sphere core-shell structure sample based on melamine-formaldehyde nanospheres; 2) preparing a TiO2@carbon core-shell structure sample using the carbon hollow sphere core-shell structure and tetrabutyl titanate as the reaction system; 3) using a one-step method to simultaneously dope nitrogen into the TiO2@carbon core-shell structure to form an N-TiO2@N-doped carbon hollow sphere heterojunction. This invention provides a method for preparing a nitrogen-doped titanium dioxide@carbon hollow sphere heterojunction photocatalyst and its application. This method achieves uniform nitrogen doping and effective composite of TiO2 and carbon hollow spheres through specific steps, and the prepared photocatalyst exhibits excellent photocatalytic performance under both visible and ultraviolet light.

The invention discloses an Ag / Cu2O / Bi2WO6 heterojunction photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The Ag / Cu2O / Bi2WO6 heterojunction photocatalyst is prepared from the following components in percentage by mass: 10 to 30 percent of Cu2O. Bi2WO6 is prepared through solvothermal reaction, then Ag is generated in situ through a heating and stirring method, finally, the Ag / Cu2O / Bi2WO6 heterojunction photocatalyst is synthesized through heating and stirring, and the Ag / Cu2O / Bi2WO6 heterojunction photocatalyst can be applied to the field of photocatalytic reduction of CO2. Compared with an existing photocatalyst, the Ag / Cu2O / Bi2WO6 heterojunction has good yield and stability, and a strong built-in electric field at the heterojunction interface can accelerate separation and transfer of carriers and enhance adsorption and activation of CO2, so that the activity of photocatalytic reduction of CO2 is enhanced.

The invention discloses a method and a system for synthesizing CO through conversion of CO2 promoted by an electric field, a mixed gas of CO2 and H2 is used as a raw material gas, and a metal rod which is connected with a direct-current power supply and applies a direct-current electric field to a catalyst is arranged; the raw material gas is subjected to a catalytic reaction under the action of a catalyst and a direct-current electric field to generate CO and H2O. According to the method, the activity of the catalyst is improved by utilizing the electric field, so that the conversion rate of CO2 and the selectivity of CO in the RWGS reaction are improved; the electric field intensity can be changed by changing an input current value, so that the catalyst activity is regulated; not only is CO2 emission reduced, but also CO2 resource utilization for preparation of high-value chemicals is realized. A catalyst bed layer of the system is arranged between two electrode plates connected with a direct-current high-voltage power supply, the two electrode plates are connected through a metal rod, an electric field is applied to the catalyst bed layer, current flows on the catalyst bed layer, the activity of the catalyst bed layer in a reactor is promoted to be improved by utilizing the electric field, and CO2 can be effectively promoted to be converted into CO.

The invention discloses a reverse shift catalyst capable of inhibiting methanation side reaction under the process condition of higher pressure and a preparation method of the reverse shift catalyst, the catalyst comprises the following effective component: iron accounting for 40-80% (weight percentage) of the total amount of the catalyst in terms of Fe2O3, an auxiliary agent for inhibiting methanation side reaction is added, and the preparation method of the catalyst is a mixing and kneading method. According to the present invention, the auxiliary agent for inhibiting the methanation side reaction is added under the reverse transformation process condition, such that the methane generation amount of the catalyst under the reverse transformation high pressure process condition is significantly reduced, the selectivity of the CO2 reverse transformation reaction is improved, the hydrogen consumption is reduced, and the new requirement of the national green dual-carbon development is met.

A process can be used for the treatment of an offgas stream, which is formed in a plant for the production of aluminum by electrolytic reduction of aluminum oxide in a melt, using at least one anode composed of a carbon-containing material. The offgas stream contains carbon oxides due to the reduction of the aluminum oxide by the carbon. At least a substream of the carbon oxides contained in the offgas stream is reacted with hydrogen or mixed with a hydrogen stream and is subsequently passed to a use. After purification and conditioning of the offgas stream in a device, an enrichment, for example with carbon monoxide, can subsequently be carried out in a reactor and the synthesis gas obtained in this way can be fed to a chemical or biotechnological plant for the synthesis of chemicals of value.

The application relates to the technical field of catalyst preparation, in particular to an in-situ formed FeO x / Fe3C catalyst as well as a preparation method and application thereof. The FeO x / Fe3C catalyst provided by the application is a heterogeneous composite structure composed of surface iron oxide (FeO x ) and bulk iron carbide (Fe3C), breaks through the limitation of only focusing on a single phase, systematically reveals the dynamic structure evolution law from the surface to the bulk, and clarifies the internal correlation with the reaction mechanism. Based on the synergistic circulation mechanism from the surface to the bulk, the FeO x / Fe3C catalyst exhibits excellent catalytic performance and stability in the reverse water gas shift reaction, which is superior to most of the catalyst systems reported at present.

A hydrogen production system for producing a hydrogen gas product includes a geologic hydrogen source configured to provide a feedstock comprising hydrogen, nitrogen, and helium and purification equipment comprising two or more of: a pressure swing adsorption (PSA) device; a guard bed; a separation membrane; a reactive membrane; or a cryogenic separation device. The purification equipment is configured to receive the feedstock from the geologic hydrogen source and produce a hydrogen gas product, and production of the hydrogen gas product exhibits a carbon intensity score less than 3.0 kg CO2 eq / kg H2.