1256 results about "Catalyst support" patented technology

The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.

The invention relates to the technical field of catalyst materials, and particularly discloses a high-stability hydrogenation catalyst and a preparation method thereof. The invention relates to a preparation method of a high-stability hydrogenation catalyst, which comprises the following steps: preparing a hollow porous microsphere as an inner core from amino-terminated hyperbranched polyaryletherketone and polyvinyl alcohol, and then coating the porous microsphere with a mesoporous silicon dioxide intermediate layer by a sol-gel method; and finally, forming an Mg-Al hydrotalcite layer on the outermost side through a coprecipitation method, dipping and modifying with La (NO3) 3 and Ce (NO3) 3 solutions to obtain a catalyst carrier, dipping the catalyst carrier in an active metal dipping solution, and drying to obtain the catalyst. The high-stability hydrogenation catalyst provided by the invention has excellent mechanical properties and more reaction active sites, has high catalytic activity and catalytic efficiency, and is relatively long in catalytic life.

The invention relates to the technical field of catalyst carriers, and discloses reticular porous spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an aluminum source, acid, a pore-forming agent, a surfactant and water to obtain pseudo sol; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the pseudo sol obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the reticular porous spherical alumina. The spherical aluminum oxide prepared by the method has abundant communicated reticular pore channels, is obviously distributed in mesopore and macropore ranges, is beneficial to obviously improving dispersion and loading of a catalyst in an aluminum oxide carrier and improving the performance of petroleum reforming and propane dehydrogenation, and has industrial production utilization value and commercial value.

The invention relates to the technical field of catalysts, and discloses a preparation method and application of a catalyst for preparing olefin through carbon dioxide hydrogenation. The preparation method comprises the following steps: fully dipping graphite in a mixed solution of dodecane and hexadecane, and taking out to obtain a catalyst carrier; and loading the Fe element and the Mg element into the catalyst carrier by adopting a method of co-precipitating and then roasting to obtain the catalyst for preparing olefin by hydrogenation of carbon dioxide. The catalyst prepared by the preparation method has high stability when being used in a reaction for preparing olefin through hydrogenation of carbon dioxide, can maintain high catalytic activity after long-term use, and has high olefin selectivity at the same time.

The invention discloses an electrocatalyst for biomass conversion and plastic degradation as well as a preparation method and application of the electrocatalyst. According to the catalyst, a carbon-based material serves as a catalyst carrier, multi-component metal and multi-component metal oxide are loaded to prepare the catalyst of a binary metal interface structure, and the catalyst is recorded as NM / TMOx / C, NM is one or more of precious metal Au, Ag, Ir, In, Pd, Pt, Ru and Rh, TM is one or more of transition metal Co, Cu, Mn, Ni, Fe and Ti, the loading amount of NM is 0.5 wt%-35 wt%, and the loading amount of TM is 1 wt%-30 wt%; the invention also provides a preparation method and an application method of the catalyst. The catalyst NM / TMO / C is high in reaction rate of electrocatalytic oxidation of biomass and plastic degradation under low potential, high in selectivity of corresponding multi-electron products, good in CO toxicity resistance, good in stability and high in repeatability.

The invention discloses a catalyst carrier and a preparation method and application thereof, and belongs to the technical field of catalyst carriers, the preparation method comprises the following steps: mixing alumina sol with a composite template agent, tin chloride and silica sol to obtain slurry; preparing carrier wet balls from the slurry, drying and roasting to obtain the catalyst carrier; the composite template agent comprises a surfactant and organic amine, the surfactant is a zwitterionic surfactant and a nonionic surfactant, and the organic amine is hexamethylenetetramine; the mass ratio of the surfactant to the organic amine is 1: (10-20); the mass ratio of the zwitterionic surfactant to the nonionic surfactant is 1: (1-2). According to the invention, the crushing strength reaches 71N / particle to 80N / particle, the specific surface area reaches 138 m < 2 > / g to 165 m < 2 > / g, the performance of the alumina catalytic carrier is greatly improved, and technical support is provided for long-term efficient and stable operation of a catalyst.

The invention provides a Ziegler-Natta catalyst silicon-magnesium composite carrier and a preparation method thereof, a continuous phase silicon solution is prepared by using a double template agent, the continuous phase silicon solution is mixed with a cross-linking agent and an initiator to obtain a dispersed phase, the dispersed phase is subjected to two-phase speed regulation mixing through a micro-fluidic chip to finally obtain double emulsion droplets, and then operations such as curing, template agent removal and acid etching are performed to obtain the Ziegler-Natta catalyst silicon-magnesium composite carrier. The preparation method comprises the following steps: preparing a spherical silicon dioxide carrier with more excellent performance, then carrying out magnesium source loading and post-treatment, and finally preparing the Ziegler-Natta catalyst silicon-magnesium composite carrier with monodispersity, hierarchical porous structure (micropore-mesopore-macropore), high loading rate and high mechanical strength, and is suitable for industrial-scale polypropylene catalyst production. The prepared catalyst carrier is more perfect in morphology and more uniform in particle size.

The invention relates to the field of environmental protection, and particularly discloses a metal oxide-loaded ozone catalyst and application thereof, by loading a metal oxide on a catalyst carrier, the material cost can be greatly reduced, the oxidation reaction efficiency can be improved through the synergistic effect between the carrier and active components, and meanwhile, the high activity of the catalyst is kept. Specifically, the service life of the catalyst can be effectively prolonged by using the porous ceramic as the carrier, and meanwhile, the COD removal effect can be effectively improved and the catalytic performance can be improved by using the characteristics of the metal oxide.

The invention relates to the technical field of catalysts, and particularly provides a methane dry reforming catalyst carrier, a catalyst and a preparation method, the carrier is composed of an alumina matrix, a cerium oxide and a lanthanum oxide doped in the alumina matrix, and an anionic surfactant, and the catalyst comprises the carrier and active metal nickel loaded on the surface of the carrier, the problems that a traditional ZrO2 or 3D-Ti-Ce-O carrier is high in cost and complex in process are solved through La / Ce coordinated regulation and control of oxygen vacancy concentration, improvement of metal dispersity by a surfactant and a low-cost coprecipitation process.

The invention discloses a preparation method and application of a carbon dioxide hydrogenation catalyst, and belongs to the field of hydrogenation catalysis. The vanadium slag is used as a raw material, a leaching solution containing silicon, chromium and vanadium is obtained through sodium salt roasting, an aluminum source is added to remove the silicon element, meanwhile, an ordered mesoporous carbon material is added, and silicon and aluminum elements are converted into an ordered mesoporous composite oxide which is used as a hydrogenation catalyst carrier; an indium salt, a cerium salt and a nickel salt are dissolved in ethanol and mixed with the carrier for isopyknic impregnation to obtain the hydrogenation catalyst; and carrying out chromium and vanadium separation on the silicon-removed leaching solution to obtain chromium sesquioxide and the all-vanadium redox flow battery electrolyte. The catalyst has a regular pore structure, ordered mesopores provide a confinement effect, dispersion and anchoring of active components are facilitated, and the activity of the catalyst is remarkably improved.

The invention provides a water-heat-resistant and acid-resistant catalyst for efficiently catalyzing polyol oxidation as well as a preparation method and application of the catalyst, and relates to the technical field of polyol oxidation catalysts. The hydrothermal-resistant and acid-resistant catalyst for efficiently catalyzing oxidation of polyol comprises a main active component, an auxiliary agent and a modified carrier, the main active component is at least one of Au, Pt and Pd; the auxiliary agent is at least one of Mn, Fe, Co, Ni, Cu, Sb and Bi; the carrier is at least one of SiO2, Al2O3, a TS-1 molecular sieve, a ZSM-5 molecular sieve and activated carbon. According to the invention, the activity and stability of the catalyst are enhanced by modifying the catalyst carrier and adding specific types of auxiliaries, so that the catalyst has excellent hydrothermal resistance and acid resistance. The raw materials of the catalyst are easy to obtain, the preparation process is simple, the reaction process is environment-friendly, and the catalyst is convenient to recycle, can be repeatedly used and shows a good industrial application prospect.

The present invention discloses a titanium dioxide / manganese dioxide / carbon composite catalyst supported on a macroscopic carrier, a preparation method thereof and an application. The preparation process is as follows: titanium dioxide is added to deionized water, stirred, potassium permanganate is added, and stirring is continued; a carbon source is added, after stirring evenly, a macroscopic carrier is added, ultrasonic mixing is carried out, and reaction is carried out under water bath conditions. After the reaction is completed, it is cooled and dried to obtain the product. Compared with the existing formaldehyde removal materials, through the mutual synergistic effect among the components of the composite catalyst in the present invention, that is, the photo-thermal synergistic catalytic oxidation under light conditions and the adsorption / catalytic oxidation under dark conditions act together to mineralize formaldehyde into environmentally harmless water and carbon dioxide. In addition, the preparation method of the present invention has a simple operation process and low raw material prices. Combining the support on a macroscopic carrier and the synergistic effect among the composite catalysts, it has the characteristics of a wide range of applicable scenarios, convenient subsequent recovery, and all-weather formaldehyde removal, and has broad application prospects.

The application discloses a high-activity and high-stability catalyst for synthesizing methacrylonitrile and a preparation method and application thereof, and has the technical scheme that (1) manganese dioxide powder is added into an acid solution and placed in an oven, and the manganese dioxide powder is pickled at 120-150 DEG C for 10-24h; the pickling solution is filtered, washed, dried and calcined to obtain a pickling-treated catalyst carrier; (2) a ruthenium precursor is added into a solvent and fully dissolved to obtain a ruthenium solution; the pickling-treated catalyst carrier is added into the ruthenium solution and loaded under ultrasonic, and then the solution is filtered, washed, dried and calcined to obtain a ruthenium monatomic catalyst. The method is simple, the reaction condition is mild, the production cost is low, raw materials are easy to obtain, the conversion rate of methacrolein is high, the yield of methacrylonitrile is high, and the stability is good.

This invention discloses a method for modifying the support medium of a Pd catalyst and its application. The preparation method of the Pd catalyst includes reacting zirconium salt, organic ligands, and acid to obtain a support UiO-66-X; then loading Pd onto the support UiO-66-X and reducing it to obtain the catalyst Pd@UiO-66-X; the organic ligands include 2-nitroterephthalic acid, 2-methoxyterephthalic acid, 2-aminoterephthalic acid, and terephthalic acid, and X is selected from NO2, OMe, NH2, and H. This invention changes the surface electron cloud density of the supported Pd nanoparticles by changing the ligands (-NO2, -H, -OMe, -NH2) of the support UiO-66, resulting in different abilities to activate hydrogen, thereby regulating the dehydrogenation and hydrogenation reactions in the racemicization process of Pd catalysis. The synergistic effect of different ligands with Pd changes the racemicization catalytic activity.

The invention relates to the technical field of catalyst preparation and application, in particular to a normal-temperature conversion and absorption bifunctional catalyst and a preparation method thereof. The technical scheme adopted by the invention is as follows: the normal-temperature conversion and absorption bifunctional catalyst comprises the following components in parts by weight: 3-15% of transition metal oxide; the content of the gamma-Al2O3 is 75%-95%; 1-5% of an alkali metal oxide; the transition metal oxide is an oxide of one or more transition metals selected from cobalt, copper, nickel, manganese and iron; the alkali metal oxide is an oxide of one or more alkali metals of potassium, calcium, sodium and magnesium. The method has the advantages that the novel catalyst capable of converting and absorbing organic sulfur at normal temperature can be obtained by optimizing the types of the catalyst carrier, the auxiliaries and the active components and adjusting the composition proportion of the catalyst, and the requirements of simple production process and high desulfurization precision can be met.

The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.

The utility model belongs to the field of air purification, and relates to an air purification assembly and an air purifier. The air purification assembly comprises a primary filter screen layer, a graphene manganese-based filter screen layer and a graphene manganese-based purification screen layer which are stacked in sequence; the graphene manganese-based filter screen layer is a filter screen layer formed by a graphene manganese-based material, and the graphene manganese-based material comprises a porous framework, and graphene and a manganese-based catalyst which are loaded on the porous framework; the graphene manganese-based purification net layer comprises an elastic framework, a gap is formed in the elastic framework, the gap is filled with a purification material, and the purification material is a composite material of graphene, activated carbon and a manganese-based catalyst. The air purification assembly provided by the utility model can quickly adsorb and purify peculiar smell in air, simultaneously realizes a good antibacterial effect, prevents mould breeding, purifies the peculiar smell of pets, and ensures a healthy living space at the same time.

The invention belongs to the field of catalyst preparation, and particularly relates to a binder for catalyst forming and a preparation method and application thereof. The binder for forming the catalyst, provided by the invention, is prepared from the following raw materials in parts by weight: 0.5 to 2 parts of magnesium chloride, 1 to 2 parts of magnesium oxide, 0.5 to 2 parts of sodium carboxymethyl cellulose, 1 to 3 parts of ethylenediamine tetraacetic acid, 2 to 6 parts of nano-hydroxyapatite modified polyester, 1 to 3 parts of organic solvent and 10 to 35 parts of water. When the binder provided by the invention is applied to catalyst forming, on one hand, the problems that a conventional catalyst is poor in binding performance, and acid gas corrodes equipment and pollutes the environment in the roasting process can be solved; on the other hand, the surface acidity of the catalyst carrier can be reduced, a suitable reaction environment can be provided for some reactions needing to be carried out in an alkaline environment or reactions with acidic reactants and intermediates, and the selectivity and conversion rate of the reactions are improved.

The invention discloses a constant-temperature and constant-humidity spherical catalyst carrier preparation device and a preparation method thereof, and relates to the technical field of spherical catalyst carrier preparation.The constant-temperature and constant-humidity spherical catalyst carrier preparation device comprises a material mixing mechanism, a knife valve is installed at the lower end of the material mixing mechanism, and a single-head spiral blanking machine is installed below the knife valve; an internal mixer is installed below the single-head spiral blanking machine, a spiral extruder is installed at the lower end of the internal mixer, a blanking head is arranged below the end of the internal mixer and connected with a feeding port of the spiral extruder, and a grain cutting head is installed on the outer side of the end of the spiral extruder. According to the scheme, the problems that an existing spherical catalyst preparation device is dispersed in structure, a powder mixer, an internal mixer, an extruder and a rolling drum are independently arranged, the occupied area is large, time and labor are wasted in material transfer in the middle process, the production efficiency is affected, and loss in the material transfer process can be caused are solved.

The invention relates to the technical field of catalyst carrier detection, in particular to an intelligent catalyst structure detection system and method based on multi-dimensional AI vision, and the method comprises the following steps: carrying out upper part detection and lower part detection on a catalyst carrier; determining a detection mode of lower detection according to the carrier detection evaluation value; for the partially-blocked channel and the completely-blocked channel, determining whether the internal structure of the corresponding single channel is deformed or not according to the gray value distribution trend of the corresponding area in the lower projection image; for the normal channel, adjusting the illumination intensity of the parallel light source, and determining whether the normal channel is a slight dust deposition channel according to the average gray value and the infrared gray value of the lower projection image; and according to the gray level variation amplitude in the mobile lower part detection, determining grids in which a partially blocked channel and a completely blocked channel of which the channel types need to be judged for the second time are located, and adjusting the detection standard of the mobile lower part detection. The precision of the detection result is improved by performing upper detection and lower detection on the catalyst carrier.

The invention belongs to the technical field of electrocatalytic nitrate reduction catalysts, and particularly relates to a graded porous hollow carbon fiber catalyst with synergistic monatomic iron and ferric oxide clusters as well as a preparation method and application of the graded porous hollow carbon fiber catalyst. The preparation method specifically comprises the following steps: stirring polyacrylonitrile and polymethyl methacrylate in an organic solvent to obtain a spinning precursor solution; the preparation method comprises the following steps: taking ferrous sulfate heptahydrate and 1, 10-phenanthroline as ligands, and stirring in an organic solvent to obtain a metal organic ligand; the preparation method comprises the following steps: stirring a spinning precursor solution and a metal organic ligand, obtaining a metal precursor-loaded composite fiber through an electrostatic spinning technology, and then carrying out pre-oxidation and high-temperature pyrolysis to obtain the composite fiber. The prepared carbon fiber has good conductivity and a unique hollow hierarchical porous structure, transmission of reactants is greatly promoted while more active sites are exposed, the carbon fiber serves as a monatomic synergistic cluster catalyst carrier, rapid transmission of electrons is facilitated, and the electro-catalysis efficiency is effectively improved.

The invention relates to an SCR (Selective Catalytic Reduction) denitration catalyst carrier and a preparation method and application thereof, and the preparation method comprises the following steps: (1) crushing a waste FCC (Fluid Catalytic Cracking) catalyst, performing roasting treatment, and performing dry ball milling after roasting to obtain powder; (2) adding the powder into a mixed acid solution for pickling treatment, wherein the mixed acid comprises inorganic acid and organic acid; (3) filtering and washing the material subjected to acid pickling treatment to obtain a solid, and drying and roasting the solid to obtain molecular sieve carrier powder; and (4) mixing the carrier powder with TiO2 by a sol-gel method to prepare a composite carrier, namely the SCR denitration catalyst carrier. The waste FCC catalyst is used as a raw material to prepare the SCR denitration catalyst carrier, and the carrier has the advantages of low heavy metal content, high active component content, good water resistance and the like.

The invention discloses a preparation method of a modified red-mud-based chlorobenzene catalyst, which comprises the following steps: taking solid waste red mud as a main component, adding a certain amount of acid for dissolving, dropwise adding alkali liquor to enable the pH value of red mud suspension to reach 8-9, washing to be neutral, drying, grinding, passing through a molecular sieve, and roasting to obtain red-mud-based catalyst carrier powder; the red-mud-based catalyst carrier powder is mixed with a nitrate solution, it is guaranteed that the active component loading content in the mixed solution is 10-20%, and a filter cake loaded with the active component is roasted and then ground to obtain the red-mud-based catalyst. According to the method, the solid waste red mud is subjected to resource utilization, the red mud is modified into the efficient and low-cost catalyst to be applied to catalytic oxidation of volatile organic compounds, volatile organic compound waste gas is eliminated, the atmospheric environment quality is improved, waste is turned into wealth, and pollution is treated with waste.

Provided here are methods for producing a shaped metal-supported catalyst. One such method includes the steps of mixing a support hydroxide with an aqueous mixture of an active metal compound to form a malleable mixture of an active metal incorporated support hydroxide, passing the malleable mixture through a molding device to produce a shaped metal-supported wet catalyst; and drying and calcining the shaped metal-supported wet catalyst. The support hydroxide contains one or more of aluminium hydroxide, silica hydroxide, zirconia hydroxide, cerium hydroxide, titanium hydroxide, lanthanum hydroxide, gallium hydroxide, or niobium hydroxide. The active metal compound can be one or more of vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, technetium, and rhenium.

The invention discloses a green continuous production process of electrolytic manganese dioxide, which comprises the following steps: mixing a manganese-containing raw material and sulfuric acid according to a mass ratio of 1: (1.2-1.5), and then carrying out acid leaching at 80-90 DEG C for 2-3 hours to improve the manganese leaching rate to 91-98%; 10-15% hydrogen peroxide oxidation is combined with accurate regulation and control and flocculent precipitation of pH 5-6, so that the iron impurity residue is less than or equal to 5 ppm; in the electrolysis process, sulfuric acid is continuously supplemented to maintain the concentration of 150-180 g / L, the titanium-based lead dioxide anode and the stainless steel cathode are matched, and the current efficiency is 88-91.5%; and carrying out three-stage countercurrent washing and drying at 120-130 DEG C on the product to obtain the electrolytic manganese dioxide with the purity of more than or equal to 93%. The process provided by the invention is suitable for resource utilization of low-grade pyrolusite, and the obtained product is mainly used in the fields of lithium-manganese battery positive electrode materials, magnetic materials and catalyst carriers.

The invention discloses a shell type supported Ni-based catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts. The method comprises the following steps: improving a vacuum drum impregnator, and heating and stirring nickel salt, a surfactant, deionized water and a peptizing aid to obtain impregnation liquid; pumping the impregnation liquid into a spraying disc of a vacuum drum impregnator, placing the catalyst carrier in the vacuum drum impregnator, and performing spraying impregnation to obtain a primary impregnation catalyst precursor; drying, aging and roasting the primary impregnation catalyst precursor to obtain a primary impregnation catalyst; and repeatedly spraying, drying, aging and roasting for a plurality of times after dipping the catalyst for one time to obtain the shell-type supported Ni-based catalyst. The shell-type supported Ni-based catalyst is used for hydrogenation reaction of 3-hydroxypropionaldehyde, and under the same reaction efficiency, the loading equivalent of the catalyst is lower, that is, the catalyst has higher mass space velocity, mild reaction conditions, higher raw material conversion rate and higher product selectivity.

The application discloses a N2O decomposition catalyst taking waste and old rare earth-based denitration catalyst as raw material and a preparation method thereof, and the catalyst is prepared from the waste and old rare earth-based denitration catalyst, diatomite and kaolin as a N2O decomposition catalyst carrier, and a nickel-lanthanum composite oxide (NiLaO x ) as a catalytically active component. The waste and old rare earth-based denitration catalyst, diatomite and kaolin are prepared into the carrier through crushing, batching and calcining processes, a nickel-lanthanum composite oxide precursor is configured into a colloidal solution, then the carrier is immersed in the nickel-lanthanum composite oxide precursor colloidal solution, and the N2O decomposition catalyst is obtained through drying and calcining. The catalyst not only realizes harmless disposal of the waste and old rare earth-based denitration catalyst, but also uses the waste and old rare earth-based denitration catalyst as a high-value resource for N2O decomposition, and the catalyst has high N2O decomposition activity and strong stability.

The invention belongs to the technical field of catalyst carrier drying, and particularly relates to a spherical catalyst carrier drying device which comprises a shell, a conveying frame is fixedly arranged in the shell, a mesh belt is arranged in the conveying frame, and the outer surface of the mesh belt is jointly divided into a plurality of spreading areas through a plurality of transverse isolating bars and two longitudinal isolating bars. A plurality of air supply assemblies are arranged on the upper side and the lower side of the loading section of the mesh belt, and lifting mechanisms are arranged on the left side and the right side of the mesh belt. The lower air supply assembly is driven by the lifting mechanism to move upwards and get close through the variable-pitch guide assembly, the local air supply strength is improved under the condition that the air source pressure is not increased, a carrier staying at a mesh belt hole end opening can be blown out upwards, mesh hole blocking is avoided, evaporation of free water on the surface of the carrier and discharging of water vapor can be accelerated, and the service life of the carrier is prolonged. Meanwhile, local stacked carriers are scattered in combination with strong wind rolling, material layer uniformity is always guaranteed, full penetration of hot air is guaranteed, and the drying rate is greatly increased.

The present invention relates to a sulfuration type hydrocracking catalyst and a preparation method and application thereof, and relates to the technical field of catalysts, the preparation method of the sulfuration type hydrocracking catalyst comprises the following steps: mixing a Y molecular sieve, amorphous silica-alumina, macroporous pseudo-boehmite, microporous pseudo-boehmite and sesbania powder, and spraying a nitric acid aqueous solution, sequentially rolling to obtain an extrudable paste, extruding into strips, drying and roasting to prepare a catalyst carrier; soluble tungsten salt and soluble nickel salt are dissolved in water to prepare a uniform solution, and steeping liquor is obtained. The invention provides a sulfuration type hydrocracking catalyst which is completely sulfurized and has fully exposed active sites, and a preparation method thereof. The sulfuration type hydrocracking catalyst is used in the field of distillate hydrocracking. The catalyst adopts a mild vulcanization method, the vulcanization process does not pass through a metal oxidation state, sulfur-containing tail gas is not generated, and the preparation method is simple, low in cost and environment-friendly, meets the green development requirement and is suitable for industrial amplification application.

A catalyst support structure may include a base material and a metal oxide support structure. The metal oxide support structure may be formed by loading a first concentration of precursors of a metal oxide onto the base material using incipient wetness impregnation (IWI) to form the catalyst support structure, performing a first calcination process on the catalyst support structure at a first temperature to produce first structures of the metal oxide, loading a second concentration of precursors of the metal oxide onto the catalyst support structure using IWI to at least partially cover the first structures of the metal oxide, and performing a second calcination process on the catalyst support structure at a second temperature lower than the first temperature to produce second structures of the metal oxide.