583 results about "Catalyst support" patented technology

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.

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 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 utility model relates to powder conveying technical field especially is concerned on a kind of catalyst carrier powder conveying equipment;Including the hopper of cone angle ≥70 °, the roughness Ra of the inner wall surface of hopper ≤0.4 μm, pneumatic flow-aiding ring is set in the height ≤1 / 3 cone height of hopper lower part and the height from discharge port, and the annular air cavity of pneumatic flow-aiding ring is connected outside gas source;Pneumatic flow-aiding ring circumferentially distributes first nozzle group and second nozzle group, and the jet direction of first nozzle group is inclined upwards along hopper inner wall, for fluidizing powder layer in advance;The jet direction of second nozzle group is inclined downwards along hopper inner wall, for promoting powder slip.

The invention discloses a method for preparing isostearic acid by hydrogenation of a bio-based carrier catalyst, and relates to the technical field of oleochemical engineering and catalyst preparation, and the method comprises the following steps: S1, preparing a bio-based supported catalyst; s2, taking isomerized oleic acid as a raw material, and carrying out catalytic hydrogenation reaction under the action of a catalyst; s3, separating a product obtained after the hydrogenation reaction to obtain isostearic acid; according to the method for preparing isostearic acid by hydrogenation of the bio-based carrier catalyst, oyster shells are selected as a catalyst carrier, and specific pretreatment and high-temperature firing are performed, so that waste biomass resources are converted into a high-specific-surface-area calcium oxide carrier with a natural nanoscale sheet-shaped superposed three-dimensional space structure; high-value utilization of waste resources is achieved, so that the effects that the cost of raw materials of the catalyst is remarkably reduced and the carrier is environmentally friendly are achieved, and the high-activity non-noble metal hydrogenation catalyst is obtained by adopting copper nitrate solution impregnation and combining with a loading mode of subsequent hydrogen reduction.

The present application provides a kind of waste oil transesterification reaction catalytic system, belong to biomass refining field.The preparation steps of catalyst include: in the solution containing Ni (NO3) 2 And Fe (NO3) 3 Carboxymethyl cellulose is added, then urea is added, reaction is carried out, and nano-porous NiFe2O4 is obtained, MgCl2 / ZnCl2 Solution and KOH / K2CO3 Solution are added to NiFe2O4 water dispersion, reaction is carried out, solid product is collected, calcination is carried out, and catalyst is obtained.Catalyst is added to waste oil to carry out catalytic reaction.The present application adopts carboxymethyl cellulose to regulate the crystal form, grain size and dispersity of catalyst carrier, and the obtained solid magnetic catalyst can improve the production efficiency of waste oil for preparing biodiesel.The catalyst has high active site, fast reaction rate, mild reaction condition, can reduce reaction energy consumption and production cost.The catalyst also has good magnetic property, is convenient for recovery.The catalyst has good stability, improves the controllability and stability of reaction.

The invention relates to a method for preparing dihydric alcohol by hydrogenolysis of polyhydric alcohol, the hydrogenolysis process of the polyhydric alcohol is carried out in the presence of a supported catalyst, the catalyst carrier is formed alumina, and the active component is Pt metal and an auxiliary agent A thereof; the auxiliary agent A is one or more than two of Mo, Fe, La, Ce, Sn, Zr, Zn, W, Al, Ga, Mn, Nd and Ta, and the loading capacity of the auxiliary agent A is 0.01%-15% by mass of Al2O3. Compared with the prior art, the selectivity of 1, 3-propylene glycol prepared by hydrogenolysis of glycerin and the like can be improved, the glycerin conversion rate can be increased, the reaction pressure window can be widened, and the stability can be improved.

The invention belongs to the technical field of anhydrous magnesium chloride production, and particularly relates to a preparation process of anhydrous magnesium chloride, which comprises the following steps: firstly, dissolving magnesium chloride hexahydrate in absolute ethyl alcohol to form a magnesium chloride ethanol aqueous solution, and then dehydrating the magnesium chloride ethanol aqueous solution by using a molecular sieve to obtain the magnesium chloride ethanol solution; carrying out secondary cooling, stirring crystallization, secondary solid-liquid separation and vacuum drying on the magnesium chloride ethanol solution to obtain high-purity anhydrous magnesium chloride; and recycling ethanol liquid obtained by solid-liquid separation and ethanol gas obtained by vacuum drying. The technical scheme provided by the invention is simple in process flow, low in energy consumption, low in equipment requirement, high in product yield and high in purity, and can be directly applied to the fields of electrolytic preparation of magnesium, catalyst carriers and the like.

The invention comprises a catalyst device (1) for hydrogen isotope exchange analysis, wherein the catalyst device (1) consists of a catalyst carrier (10) and a catalyst material (20) applied to a surface (12) of the carrier (10), wherein at least the carrier surface (12) consists of an inorganic material and the catalyst material is sputtered or electrodeposited on at least a part of the surface (12) of the carrier (10). The invention further pertains to a sample vessel (100) for hydrogen isotope exchange analysis, wherein the sample vessel (100) contains one or more catalyst devices (1) according to the invention, wherein a maximum outer diameter (D) of the catalyst device (1) is smaller than a minimum inner diameter (101) of an opening of the sample vessel (100) or of the sample vessel (100) itself. The invention also foresees a method of hydrogen isotope analysis employing the sample vessel (100) and the use of the catalyst device (1) in a method of hydrogen isotope analysis.

The application belongs to the technical field of solid waste resource recycling and treatment in petrochemical industry, and particularly discloses a method for recovering vanadium and molybdenum from waste petrochemical catalysts. The method directly mixes granular waste petrochemical catalysts with an activating agent, and then performs short-time calcination in a microwave environment to obtain calcined slag. The calcined slag is directly treated by a low-speed stirring water immersion process, and after solid-liquid separation, leaching liquor containing rare metals vanadium and molybdenum and leaching slag which can be directly used as a catalyst carrier raw material are obtained. The method can realize rapid recovery of rare metals such as vanadium and molybdenum in waste petrochemical catalysts, has short recovery and treatment time, high recovery rate, and the waste catalysts after recovery and treatment have high alumina content and can be directly used as catalyst carrier raw materials.

This application relates to catalyst systems and methods of making and using the same. Methods of making a catalyst system are provided that include contacting at least one aromatic hydrocarbon, at least one activator, at least one catalyst having a Group 3 to Group 12 metal atom or a lanthanide metal atom, and at least one catalyst support to form a first mixture. The methods include reducing the amount of aromatic hydrocarbon in the first mixture to form a second mixture having 1.5 wt% or less of aromatic hydrocarbon, based on the total weight of the second mixture. The methods can further include adding a saturated hydrocarbon to the second mixture to form a third mixture.

The application relates to the technical field of platinum catalysts, and particularly discloses an anti-yellowing platinum catalyst capable of prolonging the curing time and a preparation method thereof. The platinum catalyst comprises a platinum metal compound, an alkenyl-containing siloxane compound, an alkaline metal salt, an organic solvent and a catalyst carrier; wherein the mass ratio of the platinum metal compound, the alkenyl-containing siloxane compound, the alkaline metal salt and the organic solvent is 1:(8-20):(1.2-3):(6-20). The platinum catalyst has the advantages of being capable of prolonging the curing time and having the anti-yellowing performance, and has a wide application scenario.

This invention belongs to the field of catalyst technology, specifically relating to a modified activated carbon material for catalyst support and its preparation method. The preparation method of the modified activated carbon material for catalyst support includes the following steps: adding pretreated activated carbon and a thiol-containing silane coupling agent to an ethanol-water solution, stirring and reacting, then adding functionalized onion carbon and a catalyst to continue the reaction, filtering, washing, and drying to obtain activated carbon loaded with onion carbon; under the action of an acidic catalyst, reacting the onion carbon-loaded activated carbon and N-hydroxyethylimine diacetic acid in N,N-dimethylformamide to obtain the modified activated carbon material. The modified activated carbon material prepared by this invention, when used as a catalyst support, exhibits excellent active material immobilization effect and long-term stability, which is beneficial for improving catalytic conversion rate.

This invention discloses a copper-based catalyst supported on macroporous alumina, its preparation, and its application. The macroporous alumina-supported copper-based catalyst comprises a macroporous alumina support and copper oxide and lanthanum oxide supported on its surface. The macroporous alumina-supported copper-based catalyst is particulate with a specific surface area of ​​250-500 μm. 2 / g, pore volume 1.0~2.0 cm³ 3 The copper-based catalyst supported on macroporous alumina has an average pore size of 16-30 nm. The content of each component in the catalyst, expressed as a mass percentage, is as follows: macroporous alumina support 79%-98.9%, copper oxide 0.1%-6%, and lanthanum oxide 1%-15%. The macroporous alumina-supported copper-based catalyst of this invention exhibits high catalytic activity and selectivity for higher alcohols in the ethanol-to-higher alcohol reaction, particularly showing higher selectivity for C6-C10 fatty alcohols.

The invention discloses a preparation method of a hydrogen fuel cell catalyst carrier. The preparation method comprises the following steps: 1) preparing a nitrogen-doped porous carbon core layer; 2) coating a CeO2 shell layer with the nitrogen-doped porous carbon core layer prepared in the step 1) to obtain a nitrogen-doped porous carbon CeO2 core-shell carrier; and 3) loading a Pt catalyst on the nitrogen-doped porous carbon CeO2 core-shell carrier in the step 2) to obtain the hydrogen fuel cell catalyst carrier. Through the collaborative design of nitrogen-doped porous carbon core layer anchoring, CeO2 shell layer blocking and mild hydrogen reduction loading, the Pt particle size is stably controlled within the range of 2-3 nm, Pt particle aggregation and curing are remarkably inhibited, the long-term activity stability of the catalyst is greatly improved, the particle size increase amount after 1000-hour operation and the 1000-hour activity attenuation rate (%) are remarkably reduced, and the catalyst has good application prospects. The technical problems that a traditional carbon-based carrier Pt is poor in dispersity and rapid in activity attenuation are solved.

This invention relates to rare-earth single-atom doped alumina-supported platinum cluster catalysts, their preparation methods, and applications. The catalyst comprises a catalyst support and platinum nanoclusters dispersed on the catalyst support. The catalyst support is an alumina support doped with rare-earth elements in single-atom form. The preparation method includes the following steps: Step 1: preparing a rare-earth-aluminum composite metal oxide precursor; Step 2: preparing a catalyst support; Step 3: loading platinum onto the catalyst support; Step 4: activating the platinum-supported catalyst support. The catalyst is applied in the dehydrogenation reaction of cycloalkane. This invention, by precisely doping rare-earth elements into the alumina lattice in single-atom form, constructs stable rare-earth-oxygen active sites within the lattice, significantly promoting the migration and diffusion of hydrogen atoms from the platinum clusters to the support surface, thereby greatly enhancing the hydrogen spillover effect, improving the utilization efficiency of active hydrogen, and achieving precise control over complex reaction pathways.

An eggshell catalyst support has a porous support structure that is impregnated with an active metal catalyst. The metal catalyst is heterogeneously distributed so that the catalyst is concentrated at or near the exterior surface of the porous support structure. The catalyst may be concentrated by impregnating the support structure using a molten metal catalyst to contact bulk catalyst supports. A relatively smaller volume of molten catalyst relative to the pore volume of the support may be utilized to concentrate the catalyst in a band near the exterior surface of the supports. The viscosity of the molten metal catalyst may be adjusted to control the depth of the metal catalyst within the porous supports.

The invention discloses nanoscale Ti2O3, a preparation method and application of the nanoscale Ti2O3 as a catalyst carrier, and belongs to the technical field of nano material preparation. According to the invention, a solid-phase synthesis method is utilized, nano titanium powder and nano titanium dioxide are used as raw materials, and the nano-scale Ti2O3 brownish black powder with uniform particle size distribution is controllably synthesized. Meanwhile, a series of noble metal supported catalysts are synthesized by taking the catalyst as a catalyst carrier. According to the invention, rapid synthesis of nanoscale Ti2O3 is realized, and the particle size of the prepared sample is uniform and is about 300nm. The preparation method has the characteristics of high efficiency, rapidness, low equipment requirement, simplicity, easiness in repetition, high product purity and capability of realizing large-scale synthesis. Meanwhile, the prepared nanoscale Ti2O3 is small in size and uniform, so that a catalyst prepared by taking the nanoscale Ti2O3 as a carrier has relatively good dispersity, shows excellent electrocatalytic activity, can be prepared into catalyst slurry with relatively high uniformity, and is suitable for the fields of electrochemical catalysis and energy conversion.

The invention discloses a preparation method and application of an oligomeric vanadium (V)-based catalyst for preparing acetic acid through selective catalytic oxidation of ethyl acetate. A series of V-doped catalysts are prepared by taking an oxide as a carrier and V precursors with different masses through an impregnation method. The catalyst carrier comprises TiO2 (titanium dioxide), gamma-Al2O3 (aluminum oxide), SiO2 (silicon dioxide), CeO2 (cerium dioxide) and ZrO2 ( The mass range of the V element is 0.5 to 10.0 weight percent, preferably 2.0 weight percent. Precise regulation and control of different VOx aggregation state structures are realized by screening carriers and controlling V loading capacity. The catalyst is simple in preparation process and has good selective catalytic performance on ester VOCs (such as ethyl acetate), the conversion rate of ethyl acetate can reach 20% while the selectivity of acetic acid reaches up to 93%, and the catalyst can stably and continuously run for 300 h.

The present disclosure provides a catalytic material having a catalyst supported by a support of the hibonite type. The catalytic materials include a first catalytic material comprising an oxidative coupling methane catalyst for oxidative coupling of methane and a second selective oxidation catalytic material comprising a selective oxidation catalyst that preferentially oxidizes hydrogen and carbon monoxide relative to methane. Also provided are systems comprising the first and second catalytic materials for performing OCM reactions using a low temperature feed gas mixture, and methods of making C2 + compounds using the same.

The invention discloses a preparation method of a pseudo-boehmite catalyst carrier, and relates to the technical field of preparation of catalyst carriers. The preparation method comprises the following steps: dissolving aluminum hydroxide in a sodium hydroxide solution to obtain a reaction solution; introducing compressed carbon dioxide into the reaction liquid to generate pseudo-boehmite slurry, and carrying out filter pressing to obtain a first pseudo-boehmite wet cake; mixing the first pseudo-boehmite wet cake with industrial nitric acid, and performing aging treatment to obtain alumina gel; adding a sodium metaaluminate solution into the alumina gel to adjust the pH value, adding a composite template agent, stirring, and carrying out filter pressing again to obtain a second pseudo-boehmite wet cake; and washing, calcining and crushing the second pseudo-boehmite wet cake to obtain the pseudo-boehmite catalyst carrier. According to the preparation method provided by the invention, the structural performance of the pseudo-boehmite catalyst carrier is improved, the pseudo-boehmite catalyst carrier is of a double-pore distribution structure, and the pseudo-boehmite catalyst carrier can be suitable for various catalytic reactions related to environmental governance and repair and has the advantages of simple preparation process, low cost, excellent product structural performance and the like.

This invention discloses a method and system for converting waste plastics into hydrogen based on microwave pretreatment and solar photocatalytic reforming, belonging to the field of solid waste resource utilization and clean energy technology. The method includes: mixing waste plastics with water for microwave pretreatment to destroy their macromolecular structure and generate a liquid-phase product rich in small-molecule organic matter; performing solid-liquid separation on the liquid-phase product; and conveying the separated liquid to a flat-plate photocatalytic reactor for photocatalytic reforming under sunlight irradiation and the action of a catalyst supported on a 3D-printed substrate to produce hydrogen and high-value chemicals. The system includes a microwave pretreatment unit, a filtration unit, and a flat-plate photocatalytic reaction unit connected in sequence. This invention achieves efficient, low-carbon, and high-value conversion of waste plastics through the synergy of microwave pretreatment and solar photocatalytic reforming, effectively overcoming the problems of high energy consumption, poor product selectivity, and low photocatalytic efficiency in existing technologies.

The invention provides a catalyst carrier and a catalyst containing the same. The catalyst is obtained by mixing alkali metal salt, a cyclodextrin compound, a reinforcing agent and water, molding and roasting. When the catalyst is subsequently used for propylene dimerization, the selectivity of a target product is high, the conversion rate of raw material propylene is high, and the catalyst has better strength performance.

A high specific surface area mesoporous alumina material with a surface rich in hydroxyl groups is produced by dissolving an aluminum source in an anhydrous organic alcohol solvent containing organic carboxylic acids, slowly and uniformly adding an aqueous ethanol solution to form an alumina sol, drying to obtain an alumina gel, and then treating with high-temperature steam at 400–650°C to obtain a material with... c Mesoporous alumina materials with Al2O3 crystal phase structure, well-developed mesoporous channel structure, high specific surface area and pore volume, and containing 5.0-10.0 mmol / g aluminum hydroxyl groups on the surface of mesoporous pore walls are suitable as catalyst supports for dehydrogenation reactions. The highly uniform loading of metal Pt active components significantly improves the low-temperature reaction activity, selectivity and stability of the catalyst for efficient dehydrogenation of liquid organic hydrogen supports.

The application discloses a sludge-based activated carbon loaded monatomic catalyst, a preparation method thereof and application thereof in activating peracetic acid to degrade organic pollutants in water. The catalyst comprises a nitrogen-doped sludge activated carbon porous carrier in a graphene appearance and Fe monatomic atoms loaded on the nitrogen-doped sludge activated carbon porous carrier, wherein the Fe monatomic atoms have 2Fe-N4 and Fe2N6 double coordination structures. The preparation method comprises the following steps: S1, after wastewater sludge is dried, crushed, sieved, mixed with a ZnCl2 solution, and then solid-liquid separation is performed to obtain the solid, the solid is dried, first pyrolysis is performed in an inert atmosphere, acid washing purification is performed, and water washing is performed, a sludge-based porous activated carbon is obtained; S2, the sludge-based porous activated carbon, melamine and Fe(NO3)3.9H2O are uniformly mixed in a solvent, and then dried to obtain a precursor solid; and S3, the precursor solid is subjected to second pyrolysis in an inert atmosphere, acid etching, water washing and drying.

A printed ceramic catalyst support for a catalytic membrane and method of forming the same. The support includes a plurality of printed ceramic layers, wherein each printed ceramic layer includes a hexagonal grid having a plurality of hexagonal openings, and wherein adjacent printed ceramic layers are offset from each other such that the hexagonal openings of adjacent printed ceramic layers are misaligned; and a plurality of printed ceramic posts that connect adjacent printed ceramic layers.

A catalyst for the direct synthesis of acetic acid and ethanol from CO2 via a non-hydrogenation route, its preparation method, and its application are disclosed. This invention belongs to the field of catalyst technology and overcomes the shortcomings of existing acetic acid synthesis technologies. The solution involves using TiO2 nanotubes as the catalyst support, and the active component being a single metal Co or Pd, or a bimetallic composition of Co and Pd, with a loading of 3-7%. wt The catalyst is prepared by first using a hydrothermal method to prepare TiO2 nanotubes, and then using the TiO2 nanotubes as a carrier, impregnating, drying, and calcining to obtain the catalyst. When applied to a dual-channel fixed-bed step-by-step continuous reactor, the catalyst enables the one-step conversion of CO2 to ethanol and acetic acid via a non-hydrogenation route at low temperature and atmospheric pressure, avoiding the problem of insufficient hydrogen source in the CO2 hydrogenation route. The process of this invention is short, the conditions are mild, it does not require a high-energy-consuming syngas production step, the product composition is simple, and the subsequent separation energy consumption is low.

To promote heat radiation of a cable for supplying electric power to an electric heating type catalyst device.SOLUTION: The vehicle includes the engine 20 located in the engine room 110, the EHC50 that defines the flow passage of the exhaust gas together with the exhaust gas pipe 40 in the engine room 110 and supports the catalytic converter on the catalytic converter support that generates heat by being energized, and the third EHC50 cable 82 that connects the power supply device 70 for supplying power to the EHC50 and the 2EHC, and at least a part of the third 2EHC cable 82 is located on the upward direction side with respect to the 28A of the upper end surface of the head cover 28 of the engine 20.SELECTED DRAWING: Figure 1

The invention provides a supported composite catalyst for production of N-methyl o-fluoroaniline, a carrier is Al2O3, and active components are K2CO3, MgO and Cu. The invention discloses a preparation method of a supported composite catalyst. The preparation method comprises the following steps: step 1, dissolving potassium carbonate and magnesium nitrate with preset mass in absolute ethyl alcohol to obtain primary steeping liquor; dissolving cupric acetate in absolute ethyl alcohol to obtain a secondary steeping liquor; step 2, adding Al2O3 into the primary steeping liquor to be fully infiltrated, and drying to obtain a first precursor; step 3, adding the first precursor into the secondary impregnation liquid for full infiltration, and drying to obtain a second precursor; step 4, performing high-temperature roasting on the second precursor, and then cooling the second precursor to room temperature to obtain a K2CO3-MgO-CuO / Al2O3 intermediate; 5, the K2CO3-MgO-CuO / Al2O3 intermediate is subjected to hydrogen reduction at the high temperature, K2CO3-MgO-Cu / Al2O3 is obtained, and the supported composite catalyst is obtained. The catalyst provided by the invention can significantly increase the reaction speed, has less side reactions, and has high stability.

This invention discloses a honeycomb catalyst-supported sodium borohydride hydrogen production reaction chamber, belonging to the field of hydrogen production technology. The hydrogen production reaction chamber of this invention includes a reaction tank, a catalyst support mechanism, a solution distribution mechanism, and a temperature control mechanism. The reaction tank constructs an internal reaction space. The catalyst support mechanism houses catalyst units arranged in a honeycomb polygonal array, with each catalyst unit carrying the active catalyst component. The solution distribution mechanism is located in the upper space of the reaction tank, spraying sodium borohydride solution onto the catalyst units axially above the catalyst support mechanism. The temperature control mechanism controls the reaction temperature within the reaction tank between 30℃ and 80℃, with fluctuations controlled within ±2℃. This invention, by constructing a highly structured reaction field environment and controlling the reaction temperature through structural physics and precise closed-loop control, eliminates the "channeling" phenomenon and catalyst pulverization and loss problems of traditional sodium borohydride hydrogen production, greatly enhancing the gas-liquid-solid three-phase mass transfer efficiency.