301 results about "Hydrogen synthesis" patented technology

The invention belongs to the technical field of quartz glass, and discloses a synthetic quartz glass hydrogen loading method, which comprises: carrying out a first-stage heat treatment on synthetic quartz glass in a hydrogen atmosphere, carrying out a second-stage heat treatment in a vacuum atmosphere, and finally carrying out a third-stage heat treatment in a hydrogen-containing atmosphere so as to obtain the hydrogen-containing synthetic quartz glass. The hydrogen loading method is simple in step, quartz hydrogen loading can be completed within a short time, and the concentration of hydrogen molecules in the synthetic quartz glass meets characteristic distribution, so that the obtained hydrogen-containing synthetic quartz glass has excellent refractive index uniformity and ultraviolet radiation resistance.

The invention discloses a catalyst for synthesizing low-carbon olefin through CO2 hydrogenation reaction as well as preparation and application of the catalyst. The catalyst comprises an active component A and a core-shell structure B (at) C, wherein the active component A is a metal oxide with catalytic activity for synthesizing low-carbon olefin through a CO2 hydrogenation reaction; in the core-shell structure B (at) C, B is an SAPO molecular sieve, and C is selected from one or more of B2O3, SiO2, Al2O3, TiO2, ZrO2, kaolin and montmorillonite. The catalyst is used for synthesizing low-carbon olefin through CO2 hydrogenation, and can obviously improve the CO2 conversion efficiency and reduce the CO selectivity.

The invention relates to the technical field of smelting, in particular to a preparation method of direct reduction iron. The preparation method of the direct reduced iron comprises the following steps: by taking high-temperature and high-pressure hydrogen-rich synthesis gas generated by gasifying a biomass raw material as reducing gas, reducing pellets containing medium-low-grade iron ores to obtain the direct reduced iron, the high-temperature and high-pressure hydrogen-rich synthesis gas comprises H2 and CO; when the molar fraction of H2 is 50% < = XH2lt; when the content is 65% and the molar fraction of CO is 30%-45%, the reduction reaction temperature is 900-950 DEG C; when the molar fraction of H2 is 65% < = XH2lt; when the molar fraction of CO is 90% and the molar fraction of CO is 5%-30%, the reduction reaction temperature is 850-900 DEG C; when the molar fraction XH2 of H2 is greater than or equal to 90%, the reduction reaction temperature is 800-850 DEG C; the method can realize direct reduction of hydrogen groups of medium-low-grade iron ores, and is low in energy consumption and less in carbon emission.

The invention discloses an energy storage configuration method and device for a renewable energy power generation and hydrogen production synthesis ammonia system, and the method comprises the steps: carrying out the modeling of each workshop section of the renewable energy power generation and hydrogen production synthesis ammonia system, and obtaining a workshop section model of each workshop section; determining a target function of the renewable energy power generation hydrogen production ammonia synthesis system; determining renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation hydrogen production synthesis ammonia system; determining the initial state of the renewable energy power generation hydrogen production synthesis ammonia system by utilizing the renewable energy power demand flexibility and the energy supply flexibility; and analyzing the flexibility of the renewable energy power generation and hydrogen production synthesis ammonia system in each interval based on the initial state, and configuring an energy storage device of the renewable energy power generation and hydrogen production synthesis ammonia system based on the analysis result of the flexibility. According to the method and the device, the evaluation precision of flexibility evaluation of the P2A system is improved, and the accuracy and the reliability of energy storage configuration are further improved.

The invention relates to a method for regulating and controlling grain sizes of copper and zinc components in a copper-based catalyst through cobalt modification and application of the method, and belongs to the technical field of methanol synthesis through CO2 hydrogenation. Based on the characteristic that oxalic acid forms a complex with metal ions in an ethanol system, the cobalt-modified copper-based catalyst is prepared by adopting an oxalic acid precipitation method. By changing preparation conditions such as cobalt addition amount, precipitation temperature, reaction time and the like, effective control on the specific surface area of the catalyst, grain sizes of copper and zinc components and a copper-zinc synergistic effect is realized, the performance of the catalyst in a reaction for synthesizing methanol through CO2 hydrogenation is remarkably optimized, the CO2 conversion rate and methanol selectivity are improved, and the production cost is reduced. The regulation and control of product selectivity and methanol space-time yield are realized. The catalyst is simple in preparation process, does not introduce impurities, and has a wide application prospect in the field of industrial CO2 resource utilization.

The invention discloses a green method for synthesizing hexamethylenediamine, which comprises the following steps: by taking adiponitrile and ethanol as solvents as raw materials and taking a porous cobalt-based catalyst and a solid base catalyst which are mixed according to a certain ratio as catalysts, reacting to obtain hexamethylenediamine at the reaction temperature of 70-90 DEG C under the reaction pressure of 2-5MPa H2 and the stirring rotating speed of 500-1000rpm. In the hydrogenation process, the two catalysts are mixed and added according to a certain proportion, and efficient conversion of adiponitrile and high selectivity of hexamethylenediamine can be realized under mild conditions. The catalyst used in the method is simple in preparation process, low in cost and easy to recover, the hexamethylenediamine synthesis process is green, and good economic benefits and application prospects are embodied. The method provided by the invention solves the problem that in the traditional process of synthesizing hexamethylenediamine through adiponitrile hydrogenation, inorganic alkali, such as sodium hydroxide, ammonia water and other strong corrosive additives, needs to be added, so that the conversion efficiency and selectivity are improved, the requirement on equipment is reduced, and meanwhile, the energy consumption of later separation is reduced.

The invention aims to solve the problems of poor activity and easy sintering of a copper-zinc catalyst in a reaction for synthesizing methanol through CO2 hydrogenation in the prior art, and provides a high-activity and stable copper-zinc catalyst for synthesizing methanol through CO2 hydrogenation and a preparation method of the high-activity and stable copper-zinc catalyst. The prepared modified copper-zinc catalyst is prepared by taking copper salt, zinc salt and a precipitant as raw materials, firstly preparing the copper-zinc catalyst through a coprecipitation method, then modifying the copper-zinc catalyst by taking a hydroxyl-rich carbon-containing compound as a carbon source and zirconium salt, and carbonizing. Compared with a copper-zinc catalyst prepared by a traditional coprecipitation method, the modified copper-zinc catalyst prepared by the preparation method disclosed by the invention can anchor zirconium nanoparticles by utilizing a surface hydrophobic carbon layer formed by carbonizing the hydroxyl-rich carbon-containing compound, so that the agglomeration of catalyst particles can be avoided, and more surface oxygen defects beneficial to catalysis are provided; furthermore, the catalytic reaction activity and stability can be improved.

The invention provides a silver-cobalt-silicon catalyst for synthesizing ethanol and ethylene glycol through catalytic hydrogenation of dimethyl oxalate and a preparation method of the silver-cobalt-silicon catalyst. The preparation method comprises the following steps: firstly, taking alkaline silica sol as a silicon source, taking soluble cobalt salt as a cobalt source, synthesizing a precursor of cobaltous silicate through an ammonia distillation method, then taking soluble silver salt as a silver source, and introducing a silver element into a cobaltous silicate layer through an impregnation method or the ammonia distillation method to prepare the silver-cobalt-silicon sphere catalyst through a synthesis method. The catalyst has high activity and high stability at a low reaction temperature. According to the novel silver-cobalt-silicon catalyst, the conversion rate of dimethyl oxalate can reach 99.9% in a wide temperature range, ethanol and ethylene glycol products with different proportions can be obtained at different temperatures, the total selectivity of ethanol and ethylene glycol reaches or exceeds 90%, and the novel silver-cobalt-silicon catalyst is suitable for producing ethanol and ethylene glycol products with different proportions according to different requirements.

The invention discloses a synthesis method of a bifunctional MeOx / AZE catalyst and application of the bifunctional MeOx / AZE catalyst in catalyzing CO2 hydrogenation to synthesize high-density aviation fuel, MeOx in the catalyst is a composite metal oxide of metal Zr and auxiliary metal M, the content of Zr in the metal is 75.0-95.0 mol%, and the content of the auxiliary metal M is 5.0-25.0 mol%; the auxiliary metal M is one or more of Zn, Ga, Ce, La and In; aZE is an acidic molecular sieve. The synthesized catalyst shows excellent CO2 hydrogenation coupling performance, the polycyclic aromatic hydrocarbon is introduced in the CO2 hydrogenation reaction for functional coupling reaction, the conversion of CO2 is promoted, the coupling reaction with the polycyclic aromatic hydrocarbon is carried out, the alkyl-substituted polycyclic hydrocarbon compound is synthesized, the difficulty that high-density aviation fuel components cannot be synthesized through single CO2 hydrogenation is overcome, and the synthesis efficiency is improved. And the selectivity of the high-density aviation fuel component alkyl polycyclic hydrocarbon product with excellent performance is enhanced.

The invention relates to a system and a method for preparing hydrogen-rich synthesis gas by gasifying biogas residues by taking biogas as a composite gasifying agent, and relates to the technical field of solid waste treatment. Comprising a biomass gradient anaerobic fermenter, a solid-liquid separation device, a drying reactor, a gasification reactor, a condensing tower and a synthesis gas purifier, the biomass gradient anaerobic fermenter is communicated with the drying reactor through a solid-liquid separation device, biogas residues are conveyed to the drying reactor, the drying reactor and the biomass gradient anaerobic fermenter are communicated with the gasification reactor, and biogas and the biogas residues dried by the drying reactor are input into the gasification reactor for reaction; the gasification reactor is communicated with the condensing tower, a reaction product is conveyed into the condensing tower, the condensing tower is communicated with the synthesis gas purifier, and gas cooled by the condensing tower is purified by the synthesis gas purifier to obtain hydrogen-rich synthesis gas. According to the invention, the biogas is used as a composite gasifying agent to gasify the biogas residue, so that the yield of hydrogen is obviously improved.

The invention belongs to the technical field of organic synthesis catalysts, and particularly relates to a preparation method and application of a composite catalyst for synthesizing 1, 2-pentanediol through furfuryl alcohol hydrogenation. The preparation method comprises the following steps: preparing cerium nitrate, lanthanum nitrate, urea, a surfactant and water into an aqueous solution, dipping spherical gamma-Al2O3, and then sequentially carrying out hydrothermal reaction, drying and roasting to obtain CeO2-La2O3 / Al2O3; the preparation method comprises the following steps: preparing palladium chloride, ruthenium chloride, hydrochloric acid and water into an acidic solution, dipping CeO2-La2O3 / Al2O3, drying, roasting and performing hydrogen reduction in sequence, thereby obtaining the composite catalyst Pd-Ru-CeO2-La2O3 / Al2O3. The composite catalyst can be applied to preparation of 1, 2-pentanediol through furfuryl alcohol hydrogenation. By preparing the composite catalyst, the defects of the existing catalyst in the aspects of selectivity, stability and cost are overcome.

The invention discloses a flexible ammonia synthesis system capacity configuration optimization method based on wind-solar combined power generation. Comprising the following steps: constructing a wind-solar hydrogen production coupling ammonia synthesis system; determining flexible boundary parameters of modules for producing hydrogen by electrolyzing water, synthesizing ammonia and the like; building an energy mass flow model of the flexible system under variable working conditions by utilizing dynamic analogue simulation of coupling of water electrolysis hydrogen production and ammonia synthesis; and by taking the minimum leveling production cost as a target parameter, constructing a wind-solar hydrogen production coupling ammonia synthesis system capacity configuration optimization model, and solving a target function to obtain wind-solar installed capacity, energy storage, the scale of hydrogen storage equipment, rated power of an electrolytic bath and ammonia synthesis equipment, and the optimal leveling production cost of ammonia. The universal capacity configuration optimization method of the green ammonia synthesis system for the flexible process is realized, the leveling production cost of the green ammonia is reduced, and the method is suitable for guiding the construction, popularization and application of an actual industrial green ammonia synthesis system.

The invention provides a preparation method and application of a nitrile compound hydrogenation catalyst based on polypyrrole derived carbon fiber loaded metal nickel. The catalyst is formed by taking PPy-derived carbon fiber as a carrier and uniformly dispersing metallic nickel on the surface of the carrier through a loading process, and a PPy-derived carbon fiber precursor is prepared; the preparation method comprises the following steps: dissolving active nickel metal salt and a precipitator in water, adding PPy derived carbon fibers as a precursor, and carrying out hydrothermal stirring, centrifugal filtration and low-temperature drying; and carrying out high-temperature calcination to obtain the highly dispersed nickel-loaded PPy catalyst. The catalyst prepared by the method provided by the invention can be suitable for selective hydrogenation of nitrile compounds to synthesize amine compounds, especially for hydrogenation of adiponitrile or 6-aminocapronitrile to prepare hexamethylenediamine, and the catalyst takes PPy derived carbon fiber as a carrier; the rich nitrogen defects and pore structures of PPy are utilized to realize metal capture and high-stability dispersion, and the conductive property provided by the PPy derived carbon layer promotes electron transport, so that the activity of the catalyst is improved.

The invention provides an alkali metal modified catalyst as well as a preparation method and application thereof, alkali metal is used for modifying metal oxide with a spinel structure, the alkali metal affects the oxygen vacancy property in the spinel structure, non-dissociation adsorption of CO is promoted, formation of long-chain alpha-olefin and enhigher alcohol is facilitated, and the catalyst has the advantages of being simple in preparation process and low in cost. The catalyst is high in selectivity of long-chain olefin and high-carbon alcohol, high in CO conversion rate and low in selectivity of by-products (CH4 and the like). The preparation process of the alkali metal catalyst is simple, convenient and efficient, firstly, Prussian blue PB is synthesized, then PB serves as a template agent and reacts with other metal salts to synthesize nanocubic metal oxide MFe2O4, M can be Co, Mn, Zn, Mg and the like, and then dipping modification is conducted through alkaline metal. The alkali metal oxide prepared by the method disclosed by the invention is used as a catalyst, shows relatively excellent enol selectivity and reaction stability in a reaction for synthesizing enol through CO hydrogenation, and has a potential industrial application prospect.

The invention relates to a cooperative control method and device for a renewable energy water electrolysis hydrogen production and ammonia synthesis system, and the method comprises the steps: determining the corresponding full-day multi-period simulated hydrogen production power and full-day multi-period simulated ammonia production power according to the predicted power generation power corresponding to a target renewable energy water electrolysis hydrogen production and ammonia synthesis system; performing real-time monitoring on the target renewable energy source water electrolysis hydrogen production and ammonia synthesis system, and determining corresponding real-time power generation power and real-time hydrogen inventory of the target renewable energy source water electrolysis hydrogen production and ammonia synthesis system; performing real-time deviation correction adjustment on the full-day multi-period simulated hydrogen production power according to the real-time power generation power, and determining full-day multi-period real-time hydrogen production power; and performing real-time deviation correction adjustment on the full-day multi-period simulated ammonia production power according to the real-time hydrogen inventory, and determining the full-day multi-period real-time ammonia production power. According to the embodiment of the invention, multi-time-scale cooperative control optimization of the renewable energy water electrolysis hydrogen production ammonia synthesis system can be realized, the disposal rate of renewable energy is reduced, and the energy utilization rate and the system income and stability are improved.

The invention discloses a method and a system for synthesizing methanol through eluent reinforced carbon dioxide hydrogenation, which introduces eluent with selective solubility to water or methanol into a carbon dioxide hydrogenation reactor, thereby overcoming thermodynamic limitation and moving reaction equilibrium to a favorable direction. The system comprises a methanol synthesis unit, an eluent circulation unit and a product refining unit, the main body of the methanol synthesis unit is an eluent reinforced reactor which can be a one-section or multi-section reactor, and the eluent is introduced into the reactor or arranged among multiple sections of reaction units. According to the method, the high-heat-capacity eluent with the selective dissolving property on water or methanol is used for separating products in situ and removing reaction heat, so that the limitation of reaction balance is overcome, the conversion per pass of carbon dioxide is improved, the gas volume of a reaction outlet is reduced, the volume of a reactor is reduced, and heat management in the reactor is facilitated.

The utility model relates to the technical field of ignition of hydrogen chloride synthetic furnaces, in particular to an automatic ignition device of a hydrogen chloride synthetic furnace, which comprises the hydrogen chloride synthetic furnace, a chlorine buffer tank and a hydrogen buffer tank, a gas inlet sleeve is fixedly communicated with the bottom of the hydrogen chloride synthetic furnace, a gas inlet inner pipe is arranged in the gas inlet sleeve, and a quartz lamp holder is fixedly communicated with the top of the gas inlet inner pipe. A chlorine conveying pipeline is fixedly communicated between a top gas outlet of the chlorine buffer tank and a bottom gas inlet of the gas inlet sleeve, a hydrogen conveying pipeline is fixedly communicated between a top gas outlet of the hydrogen buffer tank and a lower gas inlet of the gas inlet sleeve, and an upper gas outlet of the hydrogen chloride synthesis furnace is fixedly communicated with a hydrogen chloride conveying pipeline; the lower part of the hydrogen chloride synthesis furnace is fixedly communicated with an ignition furnace tube. The device is reasonable and compact in structure and convenient to use, improves the success rate of ignition, reduces the occurrence rate of production accidents, realizes full automation of ignition of the hydrogen chloride synthetic furnace, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

The invention discloses a synthesis method and application of a novel high-performance atom dispersion hydrogenation catalytic material. Specifically, a novel high-performance atom dispersion hydrogenation catalytic material is synthesized from a catalytic active metal and a catalytic material carrier through an equivalent-volume impregnation method or an electrostatic adsorption method under a certain calcination condition, and the synthesis method is simple, reliable and suitable for industrial production. When the novel high-performance atom dispersion hydrogenation catalytic material is applied to coupling carbon capture and hydrogenation synthesis of methanol, an active metal center can be subjected to atom dispersion on a carrier by utilizing low metal loading capacity, adjustment of calcination temperature or electrostatic interaction, the methanol yield can reach 48% or above, the single-pass methanol conversion number reaches 12872, and the catalyst has a wide application prospect. According to the present invention, with the application of the catalyst, the catalytic activity and the noble metal atom utilization rate are significantly improved, the methanol yield can still be maintained at about 48% after the four cycles in the cycle application experiment, the single-pass methanol conversion number is stabilized between 12768 and 13441, the excellent cycle stability and the excellent catalytic activity are represented, and the high application value is provided.

The invention belongs to the technical field of synthesis of 2-methoxy-4-methylphenol, and particularly discloses a bimetallic-based catalyst for synthesizing 2-methoxy-4-methylphenol through vanillin hydrogenation as well as a preparation method and application of the bimetallic-based catalyst. Molybdenum carbide (alpha-MoC) is adopted as a carrier, cobalt and iron are loaded by an impregnation method to obtain the bimetallic-based catalyst, and the bimetallic catalyst can be used for obtaining a 2-methoxy-4-methylphenol product with high added value at high yield by taking vanillin as a raw material under mild reaction conditions. The method is short in synthesis process, low in cost, economical, effective, high in universality, environment-friendly, free of corrosion to equipment and high in product quality. The bimetallic-based catalyst not only has excellent catalytic hydrodeoxygenation performance on vanillin, but also has relatively high selectivity on 2-methoxy-4-methylphenol, and in addition, the bimetallic-based catalyst also has excellent cycle stability, wide market prospect and remarkable economic potential.

The invention discloses a method for synthesizing sustainable aviation kerosene through CO2 hydrogenation in biogas. The method comprises the following steps: taking Fe / Mn-CaO as a CO2 adsorption separating agent, taking NiMoGa ternary liquid metal as a catalyst for methane decarbonization hydrogen production, and taking a metal oxide-molecular sieve as a catalyst for synthesizing aryl aviation kerosene through CO2 hydrogenation. According to the metal oxide-molecular sieve catalyst for synthesizing the aromatic sustainable aviation kerosene through CO2 hydrogenation, a metal oxide (ABO3) with a perovskite structure is synthesized through a sol-gel method, and the metal oxide (ABO3) is physically mixed with a molecular sieve; a in ABO3 is lanthanum, and a B element comprises iron, chromium, cobalt or nickel; the molecular sieve contains ZSM-5 (Zeolite Socony Mobil-5), ZSM-11 (Zeolite Socony According to the oxide catalyst disclosed by the invention, a polydentate chelate is formed by metal nitrate and citric acid, and a special perovskite structure can be formed through simple drying and roasting, so that the oxide catalyst has excellent carburization resistance, and a formed oxygen-containing intermediate is diffused into a zeolite molecular sieve to form aromatic aviation kerosene; the preparation of aryl aviation kerosene from bio-based CO2 hydrogenation is realized.

A process for producing hydrogen comprising the steps of reforming a hydrocarbon feedstock to form a synthesis gas; subjecting the synthesis gas to one or more stages of water gas shift to convert carbon monoxide to carbon dioxide and form a hydrogen-enriched synthesis gas; and treating the hydrogen-enriched synthesis gas to form a purified hydrogen product and tail gas stream containing methane, wherein at least a portion of the tail gas stream is treated by subjecting it to partial oxidation or autothermal reforming to form a partially-oxidised or reformed tail gas, followed by of water gas shift of the partially-oxidised or reformed tail gas to form a hydrogen-enriched tail gas, and a step of carbon dioxide removal from the hydrogen-enriched tail gas to form a hydrogen stream and a carbon dioxide stream, wherein the carbon dioxide stream is recovered and a portion of the hydrogen stream is a fuel.

The present invention relates to a production process for synthesizing hexamethylenediamine by catalytic hydrogenation of adiponitrile. The process comprises the following steps: 1) preparing a catalyst precursor; 2) calcining the catalyst precursor to obtain a catalyst; 3) catalytic hydrogenation of adiponitrile under the condition of the catalyst to synthesize crude hexamethylenediamine; 4) separating hexamethylenediamine from the discharge of a fluidized bed reactor containing crude hexamethylenediamine. The present invention uses Ni(NO3)2 and / or Mg(NO3)2 as main raw materials, doped with transition metal oxides, and then performs ultrasonic adsorption using Al2O3 as a catalyst carrier to load Ni(NO3)2 and / or Mg(NO3)2 and transition metal oxides on Al2O3, and obtains a catalyst through high-temperature calcination. The doping of transition metal oxides can improve the basicity of the catalyst, eliminating the need to add a strong basic co-catalyst in the catalytic reaction stage, reducing by-product formation. Moreover, it increases the specific surface area of the catalyst, thereby reducing the adsorption of the reaction product hexamethylenediamine on the catalyst, extending the service life of the catalyst, and saving the energy consumption for catalyst regeneration.

The invention provides a nano indium oxide catalyst for selective regulation and control of a methanol product synthesized by CO2 hydrogenation, a preparation method and application thereof, and the preparation method comprises the following steps: S1, completely dissolving an indium precursor in a reaction medium, and then heating, stirring and refluxing for a period of time to obtain a mixed solution; s2, after the mixed solution is cooled, washing and centrifuging for multiple times to obtain a solid product; and S3, drying the solid product in a drying oven to obtain the nano indium oxide catalyst. The nano indium oxide catalyst with a controllable particle size and an average particle size of 5 nm-30 nm is prepared by adopting a method of heating, refluxing and decomposing an indium precursor by adopting an organic solvent, can stably operate under a high-temperature condition, is applied to a fixed bed reaction for synthesizing methanol through CO2 hydrogenation, and has the advantages that the yield is high; the catalyst has high CO2 conversion rate and adjustable methanol selectivity.

The present invention relates to a method and device for purifying and storing industrial crude hydrogen based on catalytic hydrogenation of gamma-butyrolactone, wherein the purification and storage method comprises: 2 The crude hydrogen is introduced into γ-butyrolactone for catalytic reaction, so that the hydrogen is stored in the molecules of 1,4-butanediol, realizing one-step separation and purification of crude hydrogen and catalytic hydrogen storage. Compared with the prior art, the present invention can realize one-step separation and purification of crude hydrogen and catalytic hydrogen storage, and can avoid CO and CO 2 The reaction temperature of side reactions such as hydrogenation to synthesize methanol is reduced, thereby obtaining high hydrogen storage efficiency and selectivity; when hydrogen is needed, high-purity hydrogen can be removed from 1,4-butanediol by a catalytic method; compared with traditional multi-step crude hydrogen purification methods such as water vapor shift-pressure swing adsorption-chemical absorption, the process reported in the present invention is short, efficient and low-cost.

The invention discloses a preparation method and application of a high-performance hexamethylenediamine synthesis catalyst, and belongs to the technical field of new materials. A nickel-based hexabasic alloy is prepared from 10%-30% of Ni, 20%-30% of Fe, 0.5%-3% of Mo, 0.5%-3% of Cr, 0.5%-3% of Mn and 50%-60% of Al through a vacuum melting method, the nickel-based hexabasic alloy is physically crushed into alloy powder, then the porous nickel-based catalyst is prepared through a dealloying method, iron plays a role in reducing the cost, the selectivity is improved through the microelement molybdenum, the mechanical strength is improved through the chromium, and the catalytic activity is improved through the manganese. The catalyst has the characteristics of simple preparation process, low preparation cost and the like, has more excellent reaction activity, target selectivity and stability in the reaction of synthesizing hexamethylenediamine through hydrogenation of adiponitrile compared with an industrial catalyst, and shows good economic benefits and application prospects.

The utility model relates to the technical field of steam utilization of hydrogen chloride synthetic furnaces, in particular to a device for improving steam yield and reducing discharge, which comprises a hydrogen chloride synthetic furnace, a steam flash tank, a sewage sampling cooler and a water collecting tank. The hydrogen chloride synthetic furnace is communicated with a hydrogen chloride inlet pipeline, a chlorine inlet pipeline, a hydrogen inlet pipeline, a steam conveying pipeline, a hot water pipeline and a pure water inlet pipeline, the steam flash tank is communicated with a medium-pressure steam output pipeline, and a condensate pipeline is communicated between the steam flash tank and the pollution discharge sampling cooler; a sewage collection pipeline is communicated between the sewage discharge sampling cooler and the water collection tank, a three-way valve is mounted on the medium-pressure steam output pipeline, and an upper port of the three-way valve is communicated with a low-pressure steam output pipeline. The device is reasonable and compact in structure and convenient to use, improves the yield of the byproduct steam of the hydrogen chloride synthesis furnace, reduces the production cost and the adverse effect of steam discharge on the field environment and personnel inspection, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

This invention belongs to the field of peak-shaving technology for thermal power units, specifically a deep peak-shaving method for thermal power units that combines electrolytic hydrogen production with ammonia synthesis and energy storage. It integrates an electrolytic hydrogen production with ammonia synthesis and energy storage system, an energy comprehensive utilization system, and a collaborative control system to form a closed-loop peak-shaving system: during off-peak periods, excess electricity from the thermal power unit is collected; during peak periods, the stored ammonia is used to supplement the unit's energy through coal-ammonia co-firing, while oxygen is utilized for oxygen-enriched combustion to enhance peak-shaving and stable combustion capabilities. The synthesized ammonia can also replace purchased ammonia for flue gas denitrification. Through the collaborative control system, the operation of each link is coordinated, achieving efficient energy conversion and precise control. This invention significantly improves the deep peak-shaving and peak-response capabilities of thermal power units, substantially reduces carbon and pollutant emissions, optimizes energy utilization efficiency, extends equipment lifespan, and provides strong support for the green transformation of coal-fired power and the stable operation of new power systems.

The present invention belongs to the technical field of heterogeneous catalysts, and particularly relates to a nickel-based sulfur-resistant catalyst for selective hydrogenation of propyne to propylene, a preparation method and an application thereof. A nickel-based sulfur-resistant catalyst for selective hydrogenation of propyne to propylene, the catalyst is composed of a main active component, a first co-metal, a second co-metal and a composite carrier, the main active component is nickel, accounting for 0.5% to 5.0% of the mass of the composite carrier; the first co-metal accounts for 0.5% to 5.0% of the mass of the composite carrier based on the total mass of metal atoms; the second co-metal accounts for 0.5% to 5.0% of the mass of the composite carrier based on the total mass of metal atoms. The catalyst prepared by the method has the advantages of small active metal nickel grains, high specific surface area, good sulfur resistance, etc., and can show excellent conversion rate and propylene selectivity in the reaction of selective hydrogenation of propyne to propylene.

The invention discloses a method for preparing three-dimensional graphene foam from organic silicon waste liquid, the three-dimensional graphene foam and application, and the preparation method comprises the following steps: (1) preheating and evaporating the organic silicon waste liquid to obtain organic silicon waste liquid steam, and mixing the organic silicon waste liquid steam with water vapor to obtain organic silicon waste liquid steam; then hydrolyzing in an inert atmosphere with a carrier gas flow rate of 100-1000 sccm, cooling, filtering to obtain synthesis gas, and passing the synthesis gas through an alkaline substance to obtain purified synthesis gas; (2) introducing the purified synthesis gas into a reaction furnace, carrying out a chemical vapor deposition reaction by taking foamed nickel as a substrate to obtain a three-dimensional graphene foam initial product and hydrogen-rich synthesis gas, and then preparing the hydrogen-rich synthesis gas on the surface of the three-dimensional graphene foam initial product according to the dosage per unit area of 0.2-1.0 mL / cm < 2 >, an anisole solution proppant of polymethyl methacrylate with the mass content of 5%-10% is coated, and then the three-dimensional graphene foam is obtained through acid etching. The three-dimensional graphene foam prepared by the method has excellent conductivity, is suitable for the field of functional materials such as electromagnetic shielding materials, and has a good industrial application prospect.

The application relates to a preparation and application of a molybdenum and indium co-modified cobalt-based catalyst for carbon dioxide hydrogenation synthesis of low-carbon alcohol, belonging to the field of catalysis. Co is used as an active component, In and Mo components are introduced, an alkali metal K additive is introduced, an In and Mo co-modified Co-based oxide precursor is created by adopting a sol-gel method, the precursor is reduced by hydrogen, and is further activated by CO2+H2, so that the In and Mo co-modified Co2C catalyst is obtained; the catalyst is used in a reaction of carbon dioxide hydrogenation for preparing low-carbon alcohol, under the condition that the reaction temperature is 340 DEG C and the reaction pressure is 3 MPa, the carbon dioxide conversion rate is more than 35%, and the low-carbon alcohol selectivity is close to 20%.