1331 results about "Carbon deposition" patented technology

The invention relates to the technical field of flue gas treatment, in particular to a sintering flue gas denitration and dust removal integrated post-CO removal method which is specifically completed through cooperation of a sintering flue gas treatment system, and the sintering flue gas treatment system comprises a GGH heat exchanger, a desulfurization reactor, a denitration dust remover and a CO reactor which are sequentially communicated through pipelines. The CO catalyst module is a transition metal oxide CO catalyst; the cleaning device is used for cleaning ash of the CO catalyst module; the ammonia gas is sprayed into the outlet of the desulfurization reactor, so that ammonia escape is reduced, poisoning of the CO catalyst module is reduced, the catalytic efficiency of the CO catalyst module is improved, and the service life of the CO catalyst module is prolonged; the CO catalyst module is regularly subjected to air blowing and back blowing in a closed area, so that impurities such as carbon deposition on the CO catalyst module are cleaned, more active sites are exposed, the service life of the CO catalyst module is prolonged, and the investment and operation cost is reduced by adopting a transition metal oxide CO catalyst.

The invention discloses a silicon carbon material, a preparation method thereof and a lithium ion battery. The preparation method of the silicon-carbon material comprises the following steps: S1, adding an alkaline reagent into a mixed solution containing a porous carbon-loaded silicon substrate, transition metal salt and a solvent, and drying to obtain a first precursor; s2, performing carbon deposition on the first precursor by adopting a chemical vapor deposition method, performing in-situ growth of a carbon nanotube, and then performing acid pickling and drying to obtain a second precursor; s3, performing silicon deposition on the second precursor by adopting a chemical vapor deposition method, and forming silicon nanoparticles and / or silicon nanowires in the carbon nanotubes in situ to obtain a third precursor; and S4, carrying out carbon coating on the third precursor to obtain the silicon carbon material. The silicon-carbon material is excellent in expansion inhibition performance and compressive strength and has excellent conductivity, and the lithium ion battery containing the silicon-carbon material can give consideration to excellent capacity performance, rate performance and cycle performance.

The invention discloses a silicon-carbon material, a preparation method and application thereof and a lithium ion battery. The preparation method of the silicon carbon material comprises the following steps: S1, performing carbonization treatment and activation treatment on a mixture of a carbon source and transition metal salt to obtain porous carbon; s2, performing carbon deposition on the porous carbon by adopting a chemical vapor deposition method, and growing a carbon nanotube in situ to obtain a first precursor; s3, performing silicon deposition on the first precursor by adopting a chemical vapor deposition method to obtain a second precursor; s4, carrying out carbon coating on the second precursor; and carrying out acid pickling and drying to obtain the silicon-carbon material. The silicon-carbon material is relatively good in conductivity and pressure resistance and excellent in expansion inhibition performance, and the prepared lithium ion battery can give consideration to excellent first effect, gram volume, rate capability and cycle performance.

The invention discloses a porous tubular methanol solid oxide fuel cell with a closed end, the fuel cell is a tubular solid oxide fuel cell (SOFC) stack, and the tubular SOFC stack comprises a plurality of tubular SOFC single cells; in the moving direction of fuel in the inner tube, the bottom end of the inner tube of the tubular SOFC single cell is open, the top end of the inner tube of the tubular SOFC single cell is closed, and a plurality of sections of closed areas and a plurality of sections of perforated areas are arranged on the tube wall of the inner tube and are sequentially and alternately arranged. According to the inner tube structure of the tubular SOFC single cell, the distribution uniformity of methanol on the surface of the anode of the solid oxide fuel cell can be effectively improved, so that the problem of serious carbon deposition caused by non-uniform distribution of methanol on the surface of the anode of the solid oxide fuel cell is effectively solved.

The invention provides a method for preparing a carbon nanotube with assistance of carbon dioxide, which is characterized in that methane is used as a carbon source, carbon dioxide is used as auxiliary gas, and the carbon nanotube is prepared under the action of a catalyst. Carbon deposition generated by using methane as carbon source gas is reduced by using carbon dioxide, and the quality and performance of single-wall, double-wall or three-wall carbon nanotubes are improved, so that application requirements are met.

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 provides a modeling method for SOFC electrode poisoning and performance degradation based on multiple factors, and belongs to the technical field of fuel cell numerical simulation. An SOFC three-dimensional geometric model is established, hypothesis conditions of the SOFC three-dimensional geometric model are established, physical parameters and boundary conditions of an SOFC are globally defined, physical field coupling setting is performed on a single cell geometric model of the SOFC, and the SOFC electrode poisoning and performance degradation modeling method based on multiple factors is established. Based on the Ni coarsening numerical model, the carbon deposition numerical model and the chromium poisoning numerical model, finally establishing a mathematical model of SOFC electrode poisoning and performance attenuation with multiple comprehensive factors; carrying out transient solution on different numerical models of the three-dimensional SOFC, and integrating the influence of various poisoning to obtain an SOFC electrode poisoning and performance attenuation rule; and based on the model, solving attenuation data of poisoning on electrochemical and mechanical properties of the SOFC to predict the residual service life of the SOFC.

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 provides a high-selectivity anti-carbon-deposition CO oxidation catalyst and a preparation method thereof. The CO oxidation catalyst comprises a carrier, an active component loaded on the surface and / or in the carrier, and an auxiliary agent, wherein the active component comprises a noble metal element, and the auxiliary agent comprises a non-noble metal element; by taking the total mass of the carrier as 100%, the content of the auxiliary agent is less than 10%, preferably 3-6%; the total mass of the carrier and the auxiliary agent is 100%, and the content of the active component is less than 1.5%, preferably 0.5-1.5%. The CO oxidation catalyst disclosed by the invention has the characteristics of NOx resistance, carbon deposition resistance, difficulty in oxidizing NO, high CO catalytic combustion activity and the like, and has excellent CO catalytic combustion performance, especially the performance of catalytic combustion of steel sintering flue gas CO.

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 provides a supported catalyst, a preparation method thereof and application of the supported catalyst in a dry reforming reaction of methane and carbon dioxide under a catalytic high-pressure condition, and relates to the technical field of catalysts and synthesis gas preparation through methane reforming. The supported catalyst provided by the invention comprises a MgAl2O4 carrier and metal components supported on the surface of the MgAl2O4 carrier, the metal components comprise Au particles and transition metal dispersed on the surfaces of the Au particles, and the transition metal is Ni or Co. According to the supported catalyst provided by the invention, Au particles are used as dispersed metals of active metals Ni and Co, Ni and Co are highly dispersed on the surfaces of the Au particles to form a highly dispersed catalyst, and the overall area of the active metals is effectively reduced. The supported catalyst is used for catalyzing a high-pressure methane-carbon dioxide dry reforming reaction, has anti-carbon deposition and anti-sintering performance under a high-pressure harsh condition, and can realize long-period stable operation of the reaction.

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.

According to the method for preparing the synthesis gas through the rare earth modified all-solid-state electrolytic tank, rare earth oxide particles are anchored on a porous SFM framework by dipping the rare earth oxide nano catalyst, so that the catalytic activity of the material is greatly improved, active sites participating in the reaction are increased, the electrochemical reduction reaction is facilitated, and the yield of the synthesis gas is increased. And continuous and controllable preparation of components of the synthesis gas is realized. According to the invention, the preparation process of a traditional dipping mode is simplified, the problem of cathode stability of the solid oxide electrolytic tank during high-temperature operation is solved, meanwhile, rare earth resources are reasonably utilized, the production cost is reduced, and the defects of carbon deposition during traditional cathode operation, need of adding a protective atmosphere to prevent oxidation and the like are avoided.

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 invention relates to the field of polyolefin catalytic aromatization, and discloses a low-temperature polyolefin aromatization method based on a zeolite-encapsulated metal catalyst, which comprises the following steps: heating and melting a zeolite-encapsulated metal catalyst as a lower bed layer and a mixture of polyolefin plastic and a lamellar ZSM-5 molecular sieve as an upper bed layer to carry out aromatization reaction; the zeolite encapsulated metal catalyst comprises a matrix and metal encapsulated in the matrix, and the matrix is an HZSM-5 molecular sieve. By designing a double-bed series catalytic route, polyolefin is firstly converted into low-carbon olefin, and then olefin aromatization reaction is performed, so that the reaction temperature and the content of heavy aromatic hydrocarbon are reduced; according to the catalyst for catalyzing the olefin aromatization reaction in the lower bed layer, the metal nanoparticles are encapsulated in zeolite crystals, the pore channel confinement effect is exerted to avoid generation of a large-size carbon deposition precursor, the diffusion speed of reactants and product molecules is adjusted to inhibit a deep reaction, a stable catalytic system is formed, and the catalytic activity of the catalyst is improved. The aromatic hydrocarbon yield and the service life of the catalyst can be 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 discloses a silicon-carbon composite material, a preparation method and application thereof and a lithium ion battery. The preparation method of the silicon-carbon composite material comprises the following steps: S1, carrying out silicon deposition on pre-lithiated porous carbon by adopting a chemical vapor deposition method to obtain a first precursor; s2, coating the surface of the first precursor with a passivation layer to obtain a second precursor; s3, adding an alkaline reagent into a mixed solution containing the second precursor, transition metal salt and a solvent, and drying to obtain a third precursor; s4, performing carbon deposition on the third precursor by adopting a chemical vapor deposition method to obtain a fourth precursor; and S5, carrying out polymerization reaction on slurry containing the fourth precursor, a phenolic compound and an aldehyde compound, drying and then carrying out carbonization treatment. The silicon-carbon composite material is relatively good in conductivity and mechanical strength and excellent in expansion inhibition performance, and the obtained lithium ion battery can give consideration to excellent first effect, gram volume, rate capability and cycle performance.

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 invention discloses a solid oxide electrolytic tank for high-temperature electrolysis of carbon dioxide and a preparation method. The electrolytic tank comprises a solid electrolyte substrate, an isolation layer located on one side of the solid electrolyte substrate, a cathode located on the isolation layer and an anode located on the other side of the solid electrolyte substrate. And the material of the solid electrolyte substrate is La < 0.9 > Sr < 0.1 > Ga < 0.8 > Mg < 0.2 > O < 3 > (LSGM). And the material of the isolating layer is Ce < 0.8 > Sm < 0.2 > O < 1.9 > (SDC). The cathode material is a compound composed of Sr2Fe1. 5Mo0. 5O6 (SFM) and Ce0. 8Sm0. 2O1. 9 (SDC), and La0. 8Sr0. 2Cr0. 5Mn0. 5O3 (LSCM) nano particles or CuO nano particles are attached to the cathode material. The anode material is a compound composed of La < 0.7 > Sr < 0.3 > Co < 0.2 > Fe < 0.8 > O < 3 > (LSCF) and Ce < 0.8 > Sm < 0.2 > O < 1.9 > (SDC). The nanoparticles can effectively increase the specific surface area of an electrode, generate additional active sites, provide enough reaction interfaces and gas diffusion channels, effectively promote the reduction reaction of CO2, and contribute to reducing the local carbon concentration and reducing the occurrence rate of carbon deposition.

The invention discloses a high-rate silicon-carbon composite negative electrode material and a preparation method thereof, and belongs to the technical field of new energy materials and electrochemistry. The preparation method comprises the following steps: performing oxidation layer reconstruction on photovoltaic silicon waste to obtain a two-dimensional Si / SiOx composite material, then mixing the two-dimensional Si / SiOx composite material with metal salt, and performing spray drying granulation and CVD sectional carbon deposition to realize in-situ growth and carbon coating of carbon nanotubes CNTs, thereby obtaining the high-rate silicon-carbon composite negative electrode material. According to the invention, the in-situ grown carbon nanotubes and the silicon-based material form a good conductive network and closer carbon shell coating, Si-C bonds are formed, a multi-dimensional conductive network is constructed, excellent electron / ion conductivity of the composite material is ensured, a reconstructed oxide layer inhibits volume expansion of silicon, pulverization and failure of the material are prevented, and the performance of the composite material is improved. In-situ growth CNTs are interspersed around silicon to buffer the interface stress of the silicon. The prepared composite material has excellent multiplying power and cycle performance, has kilogram-level production capacity, and shows a wide application prospect in the field of electrochemical materials.

The invention belongs to the technical field of molecular sieve catalyst preparation, and particularly relates to a Ni-based silicalite-1 molecular sieve as well as a preparation method and application thereof. According to the method, the Ni-based silicalite-1 molecular sieve is prepared under the assistance of ethanol, so that the Ni nanoparticles can be effectively and uniformly anchored in the pore channels of the molecular sieve in a dispersed manner, the problem of relatively poor metal dispersity in a traditional impregnation method and a deposition-precipitation method is solved, high dispersion of the Ni nanoparticles is realized, and the interaction between the Ni nanoparticles and the silicalite-1 is enhanced. According to the Ni-based silicaltie-1 molecular sieve provided by the invention, the size of Ni nanoparticles is relatively small, the pore channel confinement effect of the silicaltie-1 molecular sieve on metal Ni is beneficial to enhancing the metal-carrier interaction between Ni active species and the molecular sieve, and the Ni-based silicaltie-1 molecular sieve shows relatively good sintering resistance and carbon deposition resistance in a catalytic methane dry reforming reaction.

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 discloses a preparation method and application of a methane dry reforming catalyst prepared through ethanol plasma modification, particularly relates to a catalyst for converting two main greenhouse gases of CO2 and CH4 into synthesis gas with the ratio of CO to H2 being 1, and belongs to the field of waste gas treatment technologies and environment-friendly catalytic environments. The preparation method comprises the following steps: firstly, adding a proper amount of H2O into metered Ni (NO3) 2.6 H2O (the mass percent of an active component Ni in the catalyst is 10%) to dissolve the Ni (NO3) 2.6 H2O to obtain a transparent solution; adding the weighed and metered MCM-41 molecular sieve carrier into the obtained transparent solution, uniformly stirring to obtain mixed slurry, and dipping for 45 minutes; drying in a water bath in a constant-temperature heating magnetic stirrer at 80 DEG C, taking out, and drying in a drying oven at 110 DEG C for 12 hours; and putting the obtained product into a radio frequency plasma processing area for activation, the discharge power of the plasma is 200W, the processing atmosphere is EA, and the Ni / M-P (EA) catalyst is obtained. The Ni / M-P (EA) catalyst prepared by the invention has excellent catalytic activity, stability and carbon deposition resistance, and the preparation method is simple in process, easy to operate, short in time consumption and low in cost.