588results about "Carbon monoxide" patented technology

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.

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 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.

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.

The invention relates to the technical field of photocatalysts, in particular to a bismuth-defect bismuth oxybromide-sulfur-defect bismuth sulfide bromide heterojunction and a preparation method and application thereof in photocatalytic CO2 reduction, Bi (NO3) 3.5 H2O, thiourea, cetyltrimethylammonium bromide (CTAB) and the like are used as raw materials, and the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction is prepared through a two-step hydrothermal method. According to the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction, bismuth vacancies and sulfur vacancies are introduced, the visible light absorption range of the material is expanded through a proper amount of double vacancies, more electron capture centers are provided, and the separation efficiency of photo-induced electrons and the vacancies is improved, so that the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction has excellent performance of photocatalytic reduction of CO2, and the preparation method of the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction is suitable for large-scale production and application of the VBi-Bi4O5Br2 / VS-Bi19Br3S27 heterojunction. CO2 can be reduced into a single product CO, and the photoreduction efficiency of the carbon dioxide can be improved.

The invention provides a bismuth ferrite-graphite phase carbon nitride photocatalyst and a preparation method and application thereof, and relates to the technical field of photocatalysis, the preparation method comprises the following steps: dissolving a bismuth source and an iron source in a solvent, mixing with a mineralizing agent, and carrying out a hydrothermal synthesis reaction to obtain bismuth ferrite; performing first roasting treatment on the nitrogen-containing organic matter precursor to obtain graphite-phase carbon nitride; and mixing bismuth ferrite and graphite phase carbon nitride, and carrying out grinding treatment and second roasting treatment to obtain the bismuth ferrite-graphite phase carbon nitride photocatalyst. According to the preparation method, bismuth ferrite and graphite-phase carbon nitride which are prepared respectively are compounded, a Z-type heterojunction can be constructed at an interface of the bismuth ferrite and the graphite-phase carbon nitride, an internal electric field is formed, so that photo-induced electrons and holes are efficiently separated, compounding of the photo-induced electrons and the holes is effectively inhibited, and finally the oxidation-reduction capacity of the material is remarkably enhanced; therefore, the photocatalyst shows excellent photocatalytic performance, high selectivity and good cycle stability.

The invention discloses a copper oxide modified bismuth vanadate photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic reduction of carbon dioxide. The method comprises the following steps: synthesizing a BiVO4 monomer through a hydrothermal method, then mixing and stirring the BiVO4 monomer and a Cu-MOF precursor solution, carrying out electrostatic adsorption compounding, then carrying out calcination treatment to convert Cu-MOF into CuO, loading the CuO on the surface of BiVO4, forming a p-n heterojunction, and preparing the CuO / BiVO4 composite photocatalyst. According to the catalyst, separation of photon-generated carriers is effectively promoted by constructing a heterojunction, the CO2 adsorption and activation capacity is enhanced, and the CO2 photocatalytic reduction performance is remarkably improved; experiments show that the CO yield of the prepared catalyst reaches 36.77 [mu] mol.g <-1 >. H <-1 > in a reaction for 5 hours, which is about 5.7 times that of pure BiVO4, and the catalyst has good stability; the method is simple in process, low in cost and suitable for efficient photocatalytic reduction of CO2 to prepare fuel.

The invention discloses a carbon dioxide catalytic decomposition material which is characterized in that the main effective component of the carbon dioxide catalytic decomposition material is biomass activated carbon / Rh2O3 / NiO phase. The material provided by the invention can more efficiently and stably realize the treatment of decomposing and converting carbon dioxide into carbon monoxide, so that the material is more beneficial to large-scale production and preparation.

The present invention provides a method for producing carbon monoxide, which includes a step of generating carbon monoxide by a decomposition reaction of a raw material of at least one of formic acid or a formic acid alkyl ester in the presence of a solid acid catalyst. The solid acid catalyst has a BET specific surface area of 590 m 2 / g or less.

The invention belongs to the technical field of coal ethylene glycol, and particularly relates to a process and a device for finely removing impurities from carbon monoxide after cryogenic separation of synthesis gas, the device comprises an impurity removal device, the impurity removal device comprises a desulfurization tank, a dechlorination tank and a decarbonylation tank which are sequentially connected in series, or an adsorption tower which is sequentially filled with desulfurization, dechlorination and decarbonylation adsorbents; the impurity removal device is arranged to remove trace hydrogen sulfide, hydrogen chloride, carbonyl iron and carbonyl nickel in CO after cryogenic separation, so that ppb-level removal of impurities in CO is realized, poisoning of a downstream dimethyl oxalate (DMO) synthesis catalyst is avoided, the service life of the catalyst is prolonged, the production cost of an enterprise is reduced, and the operation stability of the device is improved.

This application provides a method for recycling polystyrene. Under light irradiation, polystyrene and an oxidant undergo an oxidative depolymerization reaction in the presence of graphite-phase carbon nitride to generate oxidation products. The oxidant is selected from oxygen or air. The method provided in this application utilizes graphite-phase carbon nitride as a catalyst to recover polystyrene, achieving high-value-added conversion of polystyrene with high conversion rate and high selectivity. The oxidation products include high-value-added chemical products benzoic acid, acetophenone, and benzaldehyde, as well as the byproduct CO. x The yield can reach over 95%, and the total selectivity of the oxidation products for high-value-added chemical products benzoic acid, acetophenone, and benzaldehyde can reach over 75%. The catalyst used in this application is highly stable, inexpensive, easy to synthesize, and easy to recover and separate. The method provided in this application is simple, safe, has a high reaction rate, and low reaction cost, making it an environmentally friendly method for recovering polystyrene.

The invention relates to the technical field of hydrogen production through methane cracking, in particular to a sea urchin-shaped composite catalyst, a preparation method thereof and application of the sea urchin-shaped composite catalyst in hydrogen production through methane cracking. The obtained sea-urchin-shaped composite catalyst has a sea-urchin-shaped appearance, can efficiently catalyze methane cracking to produce hydrogen, simultaneously captures CO2 produced by vapour gasification carbon deposition in a catalyst regeneration process to generate CaCO3, promotes the gasification hydrogen production of the carbon deposition and strengthens the removal effect of the carbon deposition, and the generated CaCO3 can also be converted into CO in situ, so that the catalyst has a good application prospect. The obtained catalyst has good anti-sintering performance and excellent recycling performance.

A gas production apparatus includes: a separator configured to separate and capture a separated gas including carbon dioxide as a main component from an exhaust gas of exhaust gas equipment; reactors which are downstream of the separator, each of the reactors: (i) containing a reductant configured to contact the separated gas to produce carbon monoxide through a reduction reaction of carbon dioxide; (ii) being configured to separate at least some oxygen atoms split off from carbon dioxide in the reduction reaction; and (iii) having a reducing agent containing a metal oxide configured to reduce carbon dioxide as the reductant; a reducer configured to supply a reducing gas containing a reducing substance configured to reduce the reducing agent oxidized by contact with carbon dioxide; a pressure regulator configured to regulate a pressure of the separated gas; and a flow regulator configured to regulate a flow rate of the separated gas.

The present application relates to a kind of Nb2O5 / W 18 O 49 Heterojunction nanofiber photocatalyst and its preparation method and application belong to photocatalytic material technical field. Its preparation method is first prepared Nb2O5 electrostatic spinning precursor solution, and Nb2O5 precursor web felt is obtained by electrostatic spinning technology;Then high-temperature calcination is obtained in air Nb2O5 nanofiber photocatalyst. Again, W 18 O 49 Precursor solution is prepared by hot solvent method, and W 18 O 49 It is successfully prepared Nb2O5 / W 18 O 49 Heterojunction nanofiber photocatalyst. The catalyst shows enhanced CO2 reduction activity and CO selectivity under the irradiation of ultraviolet visible light. The composite nanofiber photocatalyst provided by the application is simple, green and environmentally friendly, has high photocatalytic activity, good stability and repeatability, and has wide application market prospect.

The invention provides a mineral treatment system and a mineral treatment method.The mineral treatment system comprises a heating device and an electric heating assembly, the heating device comprises a heating part and an electric heating assembly, the heating part comprises a containing cavity used for containing a blocky structure containing SiO2, MgO and C, the electric heating assembly heats the blocky structure containing SiO2, MgO and C in a resistance heating mode, and the heating part is used for heating the blocky structure containing SiO2, MgO and C; carrying out a reaction until the real-time temperature of the blocky structure is greater than a first preset temperature to form SiC, gaseous Mg and gaseous CO; and the cooling part is provided with a cooling cavity, and the cooling cavity communicates with the containing cavity, so that gaseous Mg and CO in the containing cavity enter the cooling cavity to be cooled, and gaseous CO and solid Mg are formed. The problem that in the prior art, the added value of silicon dioxide and magnesium compounds obtained by treating serpentine through a wet treatment process is low is solved.

There are provided systems and methods for using fuel rich partial oxidation to produce an end product from waste gases, such as flare gas. Lambda sensor modifications and other control parameters that provide closed-loop mixture control at extremely fuel-rich operating conditions utilizing feed-forward and feedback approaches, physics-based engine models, novel use of a lambda sensor (02-based sensor), sensors with intermittent contact with the gas stream. In an embodiment the system and method use air-breathing engines having control systems, control parameters, sensors and input / output (I / O) for the fuel rich (ER of 1.2 and greater), partial oxidation of the flare gas to form syngas. In embodiments the syngas is further converted into an end product. In an embodiment the end product is methanol.

This invention discloses a cesium zirconate chloride / acid-modified carbon nitride heterojunction photocatalyst, its preparation method, and its application. Belonging to the field of photocatalytic materials technology, the cesium zirconate chloride / acid-modified carbon nitride heterojunction photocatalyst contains 10%-50% cesium zirconate chloride by molar percentage. The preparation method includes: adding zirconium chloride and tubular graphitic carbon nitride to hydrochloric acid and mixing them evenly to obtain precursor A; dissolving cesium chloride in hydrochloric acid to obtain precursor B; rapidly injecting precursor B into precursor A to rapidly generate a precipitate, which is then purified with methanol to obtain the target product. This invention improves the photocatalytic CO2 photoreduction efficiency by introducing an acid-modified carbon nitride and cesium zirconate chloride composite heterojunction structure. The tubular g-C3N4 can increase the specific surface area of ​​the material, providing more surface active sites; the surface protonation of acid-modified g-C3N4 can increase the polarization degree of g-C3N4, thereby significantly improving the photocatalytic performance and achieving the purpose of improving the photocatalytic activity of the composite material.

This invention discloses a NiAlEu-LDHs photocatalyst, its preparation method, and its application in catalytic CO2 synthesis of syngas, belonging to the field of catalyst preparation technology. The NiAlEu-LDHs photocatalyst is a europium-doped layered double hydroxide prepared by a hydrothermal reaction using nickel, aluminum, and europium sources, possessing a multi-level nanoflower-like structure assembled from nanosheets. The preparation method includes the following steps: a one-step hydrothermal method is used to dissolve the nickel, aluminum, and europium sources, along with urea and ammonium fluoride, in deionized water; the solution is then transferred to a polytetrafluoroethylene-lined autoclave for hydrothermal reaction. This invention introduces europium through a one-step hydrothermal method, constructing a europium-doped nanoflower-like NiAlEu-LDHs photocatalyst. In production applications, this invention's preparation method is simple and novel, with low synthesis cost, easy mass production, and significant application value.

The invention belongs to the technical field of carbon monoxide catalysts prepared through CO2 thermocatalytic hydrogenation, and provides a high-entropy oxide catalyst based on precursor valence engineering and a preparation method and application thereof. The catalyst is a CuZnMgNiCo-O high-entropy oxide with a rock salt crystal structure, Co exists in a Co < 3 + > / Co < 2 + > mixed valence state form, and the catalyst is prepared from Co2O3 through mechanical ball milling and a high-temperature solid phase method. According to the method, high-concentration oxygen vacancies are successfully constructed in situ in the catalyst, the ratio of Co < 3 + > to Co < 2 + > is optimized, and a rich HEO / Co3O4 phase interface is formed. The prepared catalyst shows excellent performance far superior to that of a CoO derivative catalyst in a reverse water gas shift reaction, has high CO2 conversion rate, CO selectivity close to 99%, apparent activation energy as low as 43 kJ / mol and excellent thermal stability, and provides a high-performance and easily-prepared catalytic material for efficient resource utilization of CO2.

The invention discloses a composite catalyst for anchoring coordinated copper anion micromolecules (preferably [Cu (BCA)] <->) in a cationic covalent organic framework (preferably EBCOF) skeleton pore channel through an ion exchange strategy, and a preparation method and application thereof. According to the catalyst, a directional electron transmission channel composed of a COF framework-ionic bond-anion copper complex is constructed in a COF body, the catalyst is used for CO2 reduction reaction under the conditions of visible light irradiation and triethanolamine as a sacrificial agent, high selectivity is shown for C2 products, the ethane generation activity is improved by about 2.62 times compared with a control sample not subjected to ion exchange treatment, and the selectivity of the catalyst is greatly improved. And the activity retention rate is not less than 90% after circulation for 5 times. The method is simple in process and mild in condition.

The application discloses a cement-chemicals co-production system and a control method thereof, and belongs to the technical field of carbon emission reduction and resource utilization in the cement industry. The system comprises a water electrolysis hydrogen production unit, a microwave-assisted hydrogen calcination unit, a cement clinker sintering unit, a synthetic gas purification unit, a synthetic gas proportioning unit, a chemical synthesis unit, a waste heat recovery unit and an automatic control and data monitoring unit. The microwave-assisted hydrogen calcination technology is used to decompose calcium carbonate into CO synthesis gas, oxygen by-product of water electrolysis is used for oxygen-enriched combustion, combined with accurate proportioning of synthetic gas and DCS and artificial intelligence collaborative control, the collaborative production of cement clinker and high-value chemicals is realized. The application reduces the carbon emission of the system by more than 70% compared with the traditional process, reduces the comprehensive energy consumption by more than 30%, the thermal efficiency is greater than or equal to 85%, the synthetic gas conversion rate is greater than or equal to 80%, and the carbon resource utilization rate and production stability are significantly improved, and the application has outstanding economic and environmental benefits.

The application belongs to the technical field of photocatalytic materials, and particularly relates to a semi-metal carbon nitride / metal organic framework MIL-53Fe heterojunction photocatalyst, a preparation method and application thereof. The mass ratio of the semi-metal carbon nitride and the metal organic framework MIL-53Fe is 1:10-3:10. The preparation method comprises the following steps: dissolving sodium tricyanomethanide and 1-butyl-3-methyl imidazole chloride in deionized water, and obtaining the semi-metal carbon nitride by using a thermal polymerization method; dissolving iron chloride hexahydrate and 1,4-benzenedicarboxylic acid in dimethylformamide, and then adding the semi-metal carbon nitride, and obtaining the semi-metal carbon nitride / metal organic framework MIL-53Fe heterojunction photocatalyst by using a hydrothermal method. The formation of the heterojunction can greatly improve the photocatalytic reduction activity of the semi-metal carbon nitride / metal organic framework MIL-53Fe on carbon dioxide.

The application relates to the technical field of integrated carbon dioxide capture and hydrogenation conversion, and discloses a calcium-based bifunctional material for integrated carbon capture-hydrogenation conversion as well as a preparation method and application thereof. The calcium-based bifunctional material for integrated carbon capture-hydrogenation conversion and the preparation method. The calcium-based bifunctional material is mainly composed of an adsorbent matrix and a catalyst matrix, the adsorbent matrix, the catalyst matrix and a dispersing agent are mixed by selecting appropriate calcium precursors, adsorbent supports and RWGS catalysts, and then the mixture is subjected to water bath heating, stirring, drying and calcination to obtain the calcium-based bifunctional material for integrated carbon capture-hydrogenation conversion. Under the working condition of normal pressure and 650 DEG C, compared with traditional calcium-based CO2 adsorbents and hydrogenation conversion catalysts, the calcium-based bifunctional material has higher CO2 adsorption capacity, CO2 conversion rate and better cycle stability in the ICCU-RWGS reaction.

The present application belongs to the field of combustible gas, and particularly relates to a composite catalyst, a preparation method thereof, and a method for preparing combustible gas. The preparation method of the composite catalyst comprises the following steps: dissolving humic acid in deionized water to obtain a humic acid aqueous solution, then adjusting the humic acid aqueous solution to be acidic, and finally adding ammonium bicarbonate, zinc chloride and aluminum nitrate into the humic acid aqueous solution and reacting for a period of time at a certain temperature to obtain a solution of the composite catalyst. The method for preparing combustible gas comprises the following steps: dissolving the above-mentioned solution of the composite catalyst in methanol to obtain a mixture, and gasifying the methanol reforming gas into combustible gas. After the composite catalyst aqueous solution and the methanol are mixed, the composite catalyst can be taken away by gasification while performing catalysis in the methanol reforming process, so that the problem of carbon deposition in the equipment is avoided, the efficient catalysis of the equipment is ensured, and the maintenance cost in the later period is reduced.

The invention discloses low-carbon cement, a production method thereof and a low-carbon cement production system, and the production method comprises the following steps: reacting and calcining a cement raw material in the presence of an iron catalyst and a carbon-containing solid to obtain the low-carbon cement. According to the scheme, through an innovative reaction mechanism, an iron catalyst and a carbon-containing solid are introduced into a cement clinker calcination system, direct reaction of calcium carbonate and carbon is realized under specific conditions by utilizing the catalytic action of iron and the reducibility of carbon, and meanwhile, energy gas such as carbon monoxide is generated, so that low-carbon and resource utilization of cement production is realized.

This disclosure relates to systems and methods for valorization of carbon monoxide tail gas streams for chemical production lines. A disclosed system includes a chemical production line with a separator to remove a product gas from a tail gas that includes carbon monoxide, separators to remove a second product gas from the tail gas, and electrolyzer systems to convert carbon monoxide in the tail gas to other useful chemicals including the second product gas. The electrolyzer products are recycled back to one or more separation stages.

The invention discloses a device and a method for preparing high-pressure CO through pressurization dehydrogenation and demethanization of a nitrogen throttling expansion CO pump, and belongs to the technical field of chemical cryogenic separation. The specific structure is as follows: purified gas from the upstream is cooled by a first heat exchanger, a stripping tower reboiler and a second heat exchanger in sequence and then enters a hydrogen-rich gas flash tank; a liquid phase at the bottom of the hydrogen-rich gas flash tank enters a stripping tower for continuous separation; a liquid phase at the bottom of the stripping tower enters a demethanizing tower for demethanizing treatment; a gas phase at the top of the demethanization tower is completely condensed by a demethanization tower condenser and then enters a demethanization tower separation tank, a liquid phase at the bottom of the separation tank is pressurized by a CO liquid pump and then is reheated by a second heat exchanger and a first heat exchanger in sequence, and a high-pressure CO product is obtained and discharged out of the cold box. The nitrogen circulation compressor provides nitrogen circulation refrigeration for the cold box, one part of circulation nitrogen provides cold energy for the demethanizer condenser after being pre-cooled and throttled and then flows back to the nitrogen circulation compressor, and the other part of circulation nitrogen is expanded and refrigerated through the nitrogen expansion machine and provides additional cold energy supplement for the cold box.