1127 results about "Carbon deposition" patented technology

The invention belongs to the technical field of metallurgical process control, and discloses a multi-sensor fused intelligent control system and method for the titanium reduction process of fine iron powder. The method aims at solving the problem that local carbon deposition is difficult to monitor and inhibit in real time in a traditional process. The method comprises the following steps of: constructing an in-furnace reaction thermodynamic constraint diagram by acquiring in-furnace temperature distribution, gas component distribution, a furnace wall vibration signal and a local pressure signal, and dividing an in-furnace region into a plurality of reaction front subregions according to the in-furnace reaction thermodynamic constraint diagram; in each partition, the system constructs a carbon deposition triggering network based on vibration-pressure coupling, the carbon deposition triggering probability is accurately calculated, and then a targeted self-adaptive gas injection strategy is generated. By globally optimizing gas injection parameters, real-time inhibition of local carbon deposition and effective separation of titanium in the titanium reduction process of the fine iron powder are achieved. According to the invention, the agglomeration phenomenon of the fine iron powder is reduced, the smoothness of a gas channel is kept, and the titanium recovery rate and the product quality are improved.

The invention discloses a catalyst for hydrogen production through tar steam reforming and a preparation method and application thereof. The catalyst comprises a cobalt-magnesium-aluminum composite spinel carrier and an active component loaded on the cobalt-magnesium-aluminum composite spinel carrier, the active component comprises nickel and at least one metal additive selected from iron, zirconium and ruthenium. The preparation method mainly comprises the following steps: preparing the carrier by adopting a coprecipitation method, loading the active component by adopting an impregnation method, and drying and reducing to obtain the final catalyst. The catalyst is used for tar component steam reforming hydrogen production reaction, especially for treating raw materials containing phenol and water vapor at 600-700 DEG C, tar conversion can be efficiently catalyzed, product gas rich in hydrogen can be generated, hydrogen selectivity is high, and almost no methane is generated. The catalyst has the advantages of high activity, good stability, strong carbon deposition resistance and the like, and is suitable for purification and high-value utilization of biomass pyrolysis tar.

The invention discloses a preparation method of a mesoporous Zn-ZSM-5 molecular sieve for preparing aromatic hydrocarbon from methanol, and belongs to the technical field of synthesis of inorganic materials. Aiming at the problems that a conventional mesoporous Zn / ZSM-5 molecular sieve catalyst Zn blocks orifices, the mesoporous structure is disordered, the molecular sieve solid yield is low, a molecular sieve framework is seriously damaged and the like, the preparation method comprises the following steps: uniformly mixing zinc gluconate with an aluminum source, a silicon source and a template agent, putting the mixture into a closed reaction container, carrying out hydrothermal crystallization, and sequentially washing, drying and roasting to obtain the mesoporous Zn / ZSM-5 molecular sieve catalyst. The sodium type molecular sieve is obtained; the preparation method comprises the following steps: carrying out multiple ion exchange on a sodium type molecular sieve by using an ammonium chloride solution, and sequentially carrying out suction filtration, washing, drying and roasting to obtain the mesoporous Zn-ZSM-5 molecular sieve. According to the preparation method of the methanol-to-aromatic hydrocarbon Zn / ZSM-5 molecular sieve provided by the invention, the obtained molecular sieve is used in the methanol-to-aromatic hydrocarbon process, and has the characteristics of high carbon deposition resistance, high aromatic hydrocarbon selectivity, low Zn wastage rate and the like.

The invention relates to a self-heating catalysis propane partial oxidation reforming coupling tube type solid oxide fuel cell system and a preparation method of a catalyst and a carrier thereof. The system comprises a fuel cell tube and a honeycomb type catalyst carrier with the catalyst, the fuel cell tube comprises a cathode layer, an electrolyte tube and an anode layer; the anode layer is located on the inner wall of the electrolyte tube, and the cathode layer is located on the outer wall of the electrolyte tube; the honeycomb type catalyst carrier is mounted at a gas inlet end of a fuel cell tube and is communicated with an inner cavity of the fuel cell tube, the catalyst is a ruthenium-based active component, comprises RuO or metal Ru and is doped with CeO as a dispersing aid, the loading capacity of Ru is 0.5-5wt%, and the proportion of CeO is 0.5-3wt%. The method has the advantages that the mechanical stability is good, the influence of the anode reduction process on the starting time is eliminated, the influence of anode carbon deposition on the performance of the SOFC is reduced, and rapid heating and rapid power generation are realized.

The invention discloses an alkaline earth metal modified aluminum oxide loaded nickel-based catalyst as well as preparation and application thereof. The alkaline earth metal modified aluminum oxide loaded nickel-based catalyst comprises a nanofiber-shaped gamma-Al2O3 carrier, Ni and alkaline earth metal oxide, wherein the Ni and the alkaline earth metal oxide are loaded on the carrier; the alkaline earth metal is at least one of Mg and Ca. The invention provides application of the alkaline earth metal modified aluminum oxide loaded nickel-based catalyst in a methane dry reforming reaction or a methane cracking reaction. The thermal stability and the carbon deposition resistance of the catalyst can be effectively improved, and the catalyst has good catalytic performance in a methane dry reforming reaction and a methane cracking reaction.

The invention belongs to the field of conductive aluminum oxide ceramic preparation, and particularly relates to a treatment method for performing carbon deposition infiltration on the surface of aluminum oxide ceramic to enable the aluminum oxide ceramic to have certain conductivity. According to the invention, wheat starch and corn starch are used as main raw materials and are converted into a volatile carbon source through a high-temperature carbonization process under the protection of inert gas; and placing the carbon source and aluminum oxide ceramic pre-subjected to conductive treatment in a high-temperature furnace protected by inert gas, and performing deposition carburizing treatment on the surface of the aluminum oxide ceramic at 800-900 DEG C to obtain the aluminum oxide conductive ceramic with certain conductivity. The method is low in raw material cost, low in sintering temperature of the related process, low in equipment investment, good in surface carburization uniformity of the aluminum oxide ceramic and stable in property.

The invention relates to a composite electrode material of an A-C core-shell structure, and belongs to the technical field of electrode materials. In the core-shell structure composite electrode material, A is any one element, two elements, three elements, four elements or five elements selected from Mn, Ni, Co, Fe, Cu, Zn, Ru, Pd and Rh; c is RE < x > Ce < 1-x > O < 2 >, and RE is any one element or two elements selected from La, Pr, Nd, Sm and Gd; x is the mole fraction of RE. By improving the interaction between the oxide and the core multi-component alloy and the synergistic effect between the elements, the structural stability and the carbon deposition resistance of the electrode material under the high-temperature condition are remarkably enhanced.

The invention discloses a preparation method and application of a monatomic catalyst for catalytic degradation of ethanethiol, and belongs to the technical field of organic sulfur pollutant treatment.The atomic-scale dispersion of Ce species is achieved through HY molecular sieve FAU type topological structure constraint and cerium loading capacity limitation, the catalyst shows atomic-scale active sites, and the catalytic degradation of ethanethiol is achieved. The conversion path of ethanethiol can be accurately regulated and controlled, and efficient degradation of ethanethiol is realized; the topological confinement effect guarantees the stability of the monatomic catalyst, and the HY molecular sieve pore channel restrains migration of Ce atoms and inhibits agglomeration of Ce metal, so that the monatomic catalyst shows good anti-sintering ability, and at the same time, sulfur poisoning and carbon deposition rate are slowed down.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention discloses a silicon-carbon negative electrode material, a preparation method thereof and a battery, and belongs to the technical field of negative electrode materials. The compaction density of the silicon-carbon negative electrode material is greater than or equal to 1.1 g / cm < 3 >, and the NLDFT total pore volume is less than or equal to 0.005 cm < 3 > / g; and in the NLDFT total pore volume of the silicon-carbon negative electrode material, the pore volume not exceeding 10% is provided by pores with the pore diameter not less than 50nm. The silicon-carbon negative electrode material has relatively high compaction density and first efficiency, and is beneficial to improving the volume energy density of the battery. The preparation method comprises the following steps: carrying out silicon deposition on a porous carbon raw material, carrying out high-pressure impregnation on a precursor obtained after primary carbon deposition by using an organic carbon source, and then carrying out secondary carbon deposition. The method is simple to operate, the silicon-carbon negative electrode material with relatively high compaction density can be prepared, and the prepared silicon-carbon negative electrode material can be further used for preparing a battery, so that the volume energy density of the battery is improved.

The application relates to the technical field of laser cleaning, in particular to a laser cleaning workstation which comprises a clamping mechanism and a cleaning mechanism, the cleaning mechanism is installed on the side of the clamping mechanism, the clamping mechanism comprises a rack, a support frame is fixedly connected to the top of the rack, a motor is installed on the back of the support frame, a rotating shaft is installed at the output end of the motor, a rotating disc is fixedly connected to the end, away from the motor, of the rotating shaft, a clamping assembly is installed on the front of the rotating disc, an elastic clamping block is installed in the clamping assembly, and an arc plate is arranged in the elastic clamping block. The application can effectively reduce pollution emission, improve the reliability of welding quality and the one-time welding qualification rate, save time and manpower cost. The laser cleaning machine can be applied to rust removal, paint removal, oil removal, oxide film removal and cleaning of black ash, carbon deposition and oil stains and other pollutants on the surface of parts after welding on various metal surfaces.

The invention discloses a nickel-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst synthesis. The nickel-based catalyst is prepared by an equivalent-volume impregnation method, a mechanochemical method and a deposition-precipitation method, the operation is simple, the cost is low, and the used raw materials are few; the method for regulating and controlling the selectivity of the prepared nickel-based catalyst to C4 olefin is simple and easy to implement, and the waterproof performance is good. According to the nickel-based catalyst, niobium oxide is used as a carrier, nickel is loaded on the niobium oxide carrier to catalyze heterogeneous ethylene oligomerization reaction, no co-catalyst is needed, the dispersity of loaded metal is effectively increased, carbon deposition and blockage are not prone to occurring in the reaction process, and the catalytic stability of the nickel-based catalyst for catalyzing the ethylene oligomerization reaction is improved.

The invention relates to high-pore-volume nitrogen-doped activated carbon for capturing carbon dioxide and a preparation method of the high-pore-volume nitrogen-doped activated carbon, and belongs to the technical field of activated carbon. In order to solve the problem that high nitrogen content and high pore volume of nitrogen-doped activated carbon are not matched, the invention provides a preparation method of high-pore-volume nitrogen-doped activated carbon for carbon dioxide capture. In the preparation process of the activated carbon, an activating medium composed of a carbon source and an activating agent and a nitrogen-containing precursor are respectively laid in different mutually isolated areas in a crucible, so that the carbon deposition effect of the nitrogen-containing precursor is weakened, the high pore volume of the activated carbon is maintained, the nitrogen content of the activated carbon is improved, and the high CO2 adsorption capacity and the high CO2 / N2 adsorption selectivity are obtained at the same time. When the high-pore-volume nitrogen-doped activated carbon prepared by the method is applied to the field of industrial CO2 trapping, high CO2 adsorption capacity can be obtained, and high CO2 purity in desorbed gas can be guaranteed.

The application discloses a hydrodesulfurization catalyst and a preparation method and application thereof. The hydrodesulfurization catalyst comprises a carrier and a second active metal component; the carrier comprises a first active metal nitride, a first active metal carbide, boron oxide and aluminum oxide; wherein the molar ratio of the first active metal nitride to the first active metal carbide, in terms of the first active metal, is 1:0.15-0.25. The hydrodesulfurization catalyst has the characteristics of good macromolecular diffusion performance, strong desulfurization capacity and good carbon deposition resistance. The hydrodesulfurization catalyst is particularly suitable for a residual oil hydrodesulfurization treatment process and has good desulfurization activity and stability.

The invention discloses a preparation method and a preparation system of a silicon-carbon negative electrode material, and the method comprises the following steps: conveying a porous carbon raw material into a deposition furnace, introducing inert gas to replace air in the deposition furnace, and vacuumizing the deposition furnace; raising the temperature of a deposition furnace to 300-800 DEG C, mixing inert gas with the preheated silicon source gas, and introducing the mixture into the deposition furnace for chemical vapor deposition to obtain a silicon-carbon composite material precursor; raising the temperature of a buffer furnace to 300-800 DEG C, conveying the precursor into the buffer furnace, and carrying out chemical vapor deposition by utilizing residual silicon source gas in the buffer furnace; carrying out gas-solid separation on the material in the buffer furnace, conveying the solid to a cladding furnace, detecting the gas, and detecting the content lt of the silicon source gas; and (2) adding 0.2 mg / L of the silicon-carbon composite material into the coating furnace, introducing coating gas into the coating furnace, and performing carbon deposition coating to obtain the silicon-carbon composite material. The preparation system disclosed by the invention is a continuous preparation system, so that the production efficiency is greatly improved, and the requirements of large-scale production are met.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for preparing 5-methylfurfural by using 2-methylfuran. The special solid acid catalyst is used for replacing traditional phosphorus oxychloride, hydrogen chloride and phosphorus-containing wastewater are eliminated from the source, and the sulfolane is used for replacing DMF (Dimethyl Formamide), so that solvent residues in the product are reduced. The solid catalyst SO4 < 2-> is modified to form a strong Bronsted acid site (-SO3H) which cooperates with Ce < 3 + > / Ce < 4 + > redox to inhibit carbon deposition, selectively activate 2-methylfuran alpha-C and inhibit side reactions, so that the selectivity and yield of a target product are improved. Na2CO3 neutralization is replaced by electrochemical neutralization, salt slag solid waste is eliminated, and environmental pollution is reduced. After the organic phase is dried and dewatered through a molecular sieve, most of the solvent is removed through rotary evaporation, and the residual crude product is subjected to centrifugal molecular distillation, so that unreacted raw materials and trace impurities are effectively removed, and the product purity is remarkably improved.

The application discloses a preformed methane reforming catalyst and a preparation method thereof. The catalyst comprises a nickel-active alumina first functional component, a cerium oxide nanocluster second functional component and an alumina inert phase. The preparation method comprises preforming an inert phase pretreatment, hydrothermal treatment, calcination and reduction. The preformed inert phase after pretreatment is used as a carrier, which greatly improves the catalyst strength, pertinently weakens the metal-carrier interaction, avoids bed layer temperature drop and carbon deposition caused by local high strength reaction, and improves the operation stability. The first functional component with a layered structure and the second functional component rich in oxygen vacancies further improve the catalyst activity and stability, and the performance indicators are overall superior to those of the existing catalyst products. The preparation method is simple and easy to implement, has no special requirements on equipment, and is conducive to the popularization and application in the fields of methane steam reforming and methane dry reforming.

The invention belongs to the technical field of industrial combustion safety control, and provides a double-channel industrial furnace gas combustion safety interlocking control system which comprises a gas / air flow ratio dynamic monitoring module, a flue CO concentration online detection module, a double-channel data conflict arbitration processor and a visual human-computer interface. Aiming at the prominent problems of incomplete combustion of coal gas, carbon deposition, detonation risk and the like which are easy to occur under the working condition of accelerated temperature rise, the system integrates visual double-insurance safety control of dynamic calculation of a flow ratio and real-time analysis of tail gas components, and all-directional safety protection in the combustion process is realized through a multi-parameter cooperative monitoring and intelligent interlocking mechanism; the detonation risk is obviously reduced; meanwhile, the air-fuel ratio fluctuation is accurately controlled within the range of + / -5%, and the carbon deposition phenomenon is effectively reduced; and remarkable economic benefits are created while reliable operation of equipment is guaranteed.

The invention provides a catalyst for methane and carbon dioxide dry reforming reaction as well as a preparation method and application thereof, and relates to the technical field of catalyst preparation. The catalyst for the methane and carbon dioxide dry reforming reaction is prepared by the following steps: taking boric acid, nickel nitrate, magnesium nitrate and aluminum nitrate as raw materials, dissolving the raw materials in water, and stirring until the raw materials are clear and transparent to obtain a mixed solution; adding an ammonia water solution into the mixed solution and stirring to obtain a precipitate mixture; placing the precipitate mixture in a hydrothermal reactor for hydrothermal reaction, and obtaining a catalyst precursor after the hydrothermal reaction is finished; filtering, washing and drying the catalyst precursor to obtain a dried product; and the dried product is calcined and cooled, and the Ni-B / MgAl2O4 catalyst is obtained. The catalyst prepared by the method provided by the invention can overcome inactivation caused by easy generation of carbon deposition in the existing Ni catalyst, and provides high methane and carbon dioxide dry reforming reaction activity and stability at the same time.

The invention relates to a method for synthesizing mesitylene by gas-phase non-hydroisomerization of unsym-trimethylbenzene, which comprises the following step of: contacting the unsym-trimethylbenzene with a catalyst under a gas-phase non-hydroisomerization reaction condition in the presence of the catalyst, wherein the catalyst is an EWT structure molecular sieve, the total pore volume of the EWT structure molecular sieve is 0.20-0.51 cm < 3 >. G <-1 >, and the mesoporous volume is 0.11-0.37 cm < 3 >. G <-1 >. According to the method disclosed by the invention, the EWT structure molecular sieve with an ultra-large pore channel structure is adopted as the catalyst, and when the catalyst is used for synthesizing mesitylene through unsym-trimethylbenzene gas-phase non-hydroisomerization, the distribution conditions of raw materials and products are improved, the conversion rate of unsym-trimethylbenzene and the selectivity and the mass yield of mesitylene are improved, heavy component carbon deposition is slowed down, and the yield of mesitylene is improved. The service life of the catalyst is prolonged.

The present invention provides a hydrogenation catalyst, and a preparation method therefor and a use thereof. The catalyst of the present invention comprises an active component and a carrier, wherein the active component is composed of Ni, Mo, and P, and the carrier is a composite oxide comprising magnesium oxide, aluminum oxide, and silicon oxide; and on the basis of the weight of the catalyst, the mass ratio of Ni to Mo in the active component is 1.1-5, preferably 1.9-2.3, and Ni is calculated as NiO and Mo is calculated as MoO3. The active component of the catalyst of the present invention contains a high content of nickel. When used for the second-stage hydrogenation of cracked gasoline, the catalyst can be suitable for treating a raw material having a higher diene content, shows relatively strong monoolefin saturation performance and desulfurization and denitrification activity, can effectively inhibit carbon deposition, and has high stability. Therefore, the catalyst of the present invention is particularly suitable for use in industrial production of the second-stage hydrogenation of cracked gasoline or a fraction thereof.

The application discloses a cold plasma microbubble and biomass supercritical water gasification hydrogen production system and method, and belongs to the field of biomass hydrogen production. The system comprises a raw material processing unit, a cold plasma pre-activation unit, a high-pressure subcritical pretreatment unit, a supercritical gasification reaction unit, a gas-liquid separation unit, a hydrogen gas purification unit, a waste heat recovery unit and a circulating water treatment unit. After being pulped, the raw material is modified by the cold plasma pre-activation unit to improve the activity, and then enters the supercritical reactor with a built-in catalytic bed through the high-pressure subcritical pretreatment unit containing plasma microbubble generated active species to complete the gasification. After the product gas-liquid separation, the hydrogen-containing gas is purified to obtain high-purity hydrogen gas, the liquid phase water is purified and reused, the waste heat is recovered to supply system energy consumption, and the circulating water is treated to discharge crystalline salt to prevent salt analysis. The application realizes the deep cooperation of cold plasma and supercritical water gasification, improves the gasification efficiency and hydrogen production selectivity, reduces the energy consumption, tar and carbon deposition, guarantees the stable operation of the system, reduces the comprehensive cost, and is suitable for the industrialization of biomass hydrogen production.

The invention discloses a dispatching method and system based on a distributed diesel generator and a virtual power plant, and relates to the technical field of power systems and energy internet. Comprising the steps that a local control unit establishes an operation constraint model containing a nonlinear fuel efficiency and carbon deposition risk model, and generates a health recommendation domain; the cloud end generates a triple scheduling instruction packet containing reference power, offset bandwidth and weight vectors in combination with power grid constraints; identifying the impedance of a grid-connected point on line at the edge side, and carrying out asymmetric compression correction on the bandwidth based on the voltage sensitivity under a weak grid; and the local unit performs rolling optimization solution under the double constraints of the corrected instruction and the local model, and switches to the anti-carbon deposition autonomous mode containing dummy load input when the communication is interrupted and the carbon deposition risk is high. According to the invention, through cloud-side-end cooperation and hierarchical closed-loop correction, the conflict between the weak network voltage out-of-limit risk and the low-load carbon deposition of the unit is effectively solved, and the safety and the performability of scheduling are improved.

The invention discloses a self-correction method for carbon deposition of a nitrogen-oxygen sensor, relates to the technical field of motor vehicle exhaust emission monitoring, and solves the problems that an existing solution for carbon deposition of the nitrogen-oxygen sensor causes irreversible damage to the nitrogen-oxygen sensor and the compensation error limitation is small. The method comprises the following steps: acquiring driving parameters and real-time NOx concentration of a vehicle, inputting the driving parameters into a constructed driving parameter-NOx concentration related neural network model to obtain predicted NOx concentration, obtaining a difference between the real-time NOx concentration and the predicted NOx concentration to obtain a NOx concentration deviation value, and calculating the NOx concentration deviation value according to the calculated NOx concentration deviation value. And a NOx concentration correction strategy is triggered according to the NOx concentration deviation value to obtain a NOx concentration correction value, and when preset engine parameter conditions are met, the fuel injection quantity is controlled according to the NOx concentration correction value. The phenomenon of insufficient combustion of the engine is reduced, the carbon deposition generation rate is reduced, and the requirement for frequent disassembly and cleaning of the sensor due to carbon deposition failure is avoided.

The invention provides an anti-carbon-deposition Ni-based catalyst and a preparation method and application thereof, and relates to the technical field of catalysts.The preparation method comprises the following steps that nickel salt, metal auxiliaries and aluminum salt are mixed and dissolved and then react through a solvothermal method to obtain a precursor, and the precursor is calcined and reduced to obtain the anti-carbon-deposition Ni-based catalyst; wherein the metal additive comprises at least one of alkaline earth metal and rare earth element. Alkaline earth metal and rare earth elements are added in situ to regulate alkaline sites, so that dispersion of nickel can be improved, catalytic activity of the catalyst can be improved, adsorption and dissociation of CO2 can be enhanced due to proper alkalinity, carbon deposition can be reduced, and stability of the catalyst can be improved.

The invention provides a silicate nanotube photo-thermal composite catalyst with CeO2-ZrO2 compositely coated with Ni as well as a preparation method and application of the silicate nanotube photo-thermal composite catalyst, and belongs to the technical field of energy materials. The catalyst takes a layered silicate nanotube as a carrier, is loaded with an active component Ni, and is coated with a CeO2-ZrO2 composite shell layer. The preparation method comprises the steps that firstly, a Ni-PSNTs precursor is synthesized through microwave hydrothermal synthesis, then Ce-Zr hydroxide is deposited in an ethanol solvent, ZrO2 / CeO2 layers are stacked alternately through an atomic layer deposition method, H2 / N2 pulse reduction is conducted after calcination, and the target catalyst is obtained. The methane conversion efficiency and stability are obviously improved. The problems that a traditional catalyst is low in activity, poor in carbon deposition resistance and low in photo-thermal efficiency are solved, and the catalyst is suitable for the fields of efficient conversion of fossil energy and the like.

The invention discloses a monolithic foamed nickel catalyst, a preparation method of the monolithic foamed nickel catalyst and efficient application of the monolithic foamed nickel catalyst in methane dry reforming, and relates to a strategy of in-situ construction of a Ni interface active site monolithic catalyst by taking porous foamed metal as a substrate. The reaction rate of methane dry reforming is improved by utilizing excellent thermal conductivity and abundant three-dimensional channels of a foamed nickel structured metal material, and adverse effects of sintering, carbon deposition and the like on active sites caused by methane cracking and carbon monoxide cracking are balanced; the monolithic catalyst prepared by the invention is applied to a methane dry reforming reaction with a certain concentration, under the conditions that the pressure is 0.1-1 MPa, the mass space velocity is 10000-50000 mL.gcat <-1 >. H <-1 >, CH4: CO2: N2 is 1: 1: 3 and the temperature is 650-700 DEG C, the CO2 conversion rate exceeds 85%, the CH4 conversion rate exceeds 75%, and the monolithic catalyst is expected to be applied to an industrial methane dry reforming process.

The invention discloses a composite catalyst for recovering monophenol from waste fan blades as well as a preparation method and application of the composite catalyst. The catalyst is prepared by taking a beta molecular sieve as a carrier and CeO2-Fe2O3 bimetallic oxide as an active component through a coprecipitation-calcination method. By changing the proportion of Ce < 2 + > / Fe < 3 + >, precise regulation and control of intermetallic interaction can be realized, and the content of active oxygen species and acid sites on the surface of the catalyst is remarkably increased. Meanwhile, due to the ordered macroporous structure of the beta molecular sieve, the shape selectivity of reactants is enhanced, the monophenol yield is remarkably increased, and the problem of carbon deposition in the catalysis process is effectively inhibited. The catalyst has high specific surface area, excellent catalytic activity and cycling stability, and can realize efficient catalytic conversion of waste fan blades within 450-650 DEG C. The process is simple and convenient to operate, low in energy consumption and high in monophenol yield, has both environmental and economic benefits, and provides a new strategy for resource utilization of fan blades.

The invention provides a composite catalyst for supercritical water gasification hydrogen production and a preparation method and application thereof, and relates to the technical field of organic solid waste recycling, the composite catalyst comprises a carrier, an active component and an auxiliary agent; the carrier is prepared from a ZrO2 mesoporous material co-doped with Ce and La; the active component comprises Ni-Co bimetallic nanoparticles, and the Ni-Co bimetallic nanoparticles are subjected to vulcanization treatment to form a core-shell structure in which Ni-Co metal is wrapped by sulfur; and the auxiliary agent comprises MoO3. According to the composite catalyst, a Ce-La-ZrO2 mesoporous material serves as a carrier, Ni-Co bimetallic nanoparticles serve as an active component, a core-shell structure (NiCo at S) is formed after vulcanization treatment, the surface of the core-shell structure is covered with a layer of sulfur atoms, carbon deposition can be effectively inhibited, the chlorine poisoning resistance of the catalyst is enhanced through the added MoO3 auxiliary, and the service life of the catalyst is prolonged.

The invention discloses an SOFC (solid oxide fuel cell) natural gas reforming hydrogen production system, a using method thereof and a power generation system, and relates to the technical field of SOFC stacks, the SOFC natural gas reforming hydrogen production system comprises an injection mixer, a reforming hydrogen production device, a water vapor input pipeline and a natural gas input pipeline, the injection mixer and the reforming hydrogen production device are connected in sequence, and the water vapor input pipeline and the natural gas input pipeline are respectively communicated with the injection mixer; natural gas and water are conveyed into the injection mixer through the natural gas input pipeline and the water vapor input pipeline respectively, are mixed in the injection mixer and then are discharged into the reforming hydrogen production device; comprising an SOFC electric pile, and the SOFC electric pile is communicated with a gas outlet of a reforming hydrogen production device through a pipeline; deionized water enters a water vapor generator to become high-pressure water vapor, the high-pressure water vapor enters an injection mixer according to a certain molar ratio, natural gas with a certain molar ratio is injected, mixed gas with a stable water-carbon ratio is generated, then the mixed gas enters a reforming hydrogen production device for reforming hydrogen production, reformed gas of H2 and CO is generated, and then the reformed gas enters an SOFC electric pile for power generation. The water-carbon ratio can be accurately controlled, the service life is long, the power generation efficiency is high, and carbon deposition is not prone to occurring.