881results about "Catalyst carriers" patented technology

The invention belongs to the technical field of chemical engineering, and particularly relates to a catalyst for sulfuric acid production. The samarium element is doped in the vanadium catalyst, so that the oxygen adsorption capacity of the vanadium catalyst is effectively improved, and the catalytic activity and low-temperature activity of the vanadium catalyst are improved; the modified diatomite and the mesoporous material are selected to jointly form the carrier, so that the dispersity of the active component on the catalyst can be improved, and the catalytic activity of the catalyst can be improved; diatomite is modified by adopting a dilute sulfuric acid solution under an ultrasonic condition, so that the specific surface area of the diatomite is increased, and the catalytic activity of the vanadium catalyst is improved; the vanadium catalyst is prepared by adopting an impregnation method, so that the problem of non-uniform dispersion of active components caused by a mixing and grinding method is effectively avoided, and the catalytic activity of the catalyst is further improved.

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 belongs to the technical field of catalysts, and particularly relates to a palladium catalyst for anthraquinone hydrogenation and a preparation method thereof.The preparation method comprises the following steps that hexadecyl trimethyl ammonium bromide serves as a main template agent, a small amount of polyethylene glycol is added, and a catalyst carrier with the high specific surface area is prepared; impregnating the catalyst carrier with a palladium salt solution; and drying, roasting and reducing the impregnated catalyst carrier to obtain the palladium catalyst for anthraquinone hydrogenation. The palladium catalyst for anthraquinone hydrogenation takes the prepared aluminum oxide with high specific surface area as a carrier, so that the catalytic efficiency is greatly improved. On one hand, the large aperture of the catalyst carrier can reduce diffusion resistance and is beneficial to transmission of reaction materials; and on the other hand, anthrahydroquinone generated by the reaction is more easily diffused from a larger hole, so that reduction of catalytic activity due to overlong retention time of anthrahydroquinone in the hole channel is avoided. Meanwhile, the large specific surface area of the catalyst carrier can enable the active components to be better dispersed, so that the hydrogenation efficiency is remarkably improved.

The invention is suitable for the technical field of photocatalyst preparation, and provides a modified tubular g-C3N4 loaded Ni-CoP photocatalyst and a preparation method thereof. The preparation method comprises the following steps: calcining a carbon nitride precursor in stages to obtain tubular carbon nitride, stirring the tubular carbon nitride with a cobalt and nickel-containing compound and an alkaline compound, washing and drying to obtain a precipitate, calcining, mixing and grinding with a phosphorus-containing compound, calcining again, and modifying the product with polydopamine and polypyrrole to obtain the composite material. The photocatalyst modified by the polydopamine and the polypyrrole and loaded with the Ni-CoP by taking the tubular g-C3N4 as the carrier is obtained. According to the invention, three-in-one synergistic integration of'carrier-modifier-cocatalyst 'is realized, the prepared photocatalyst still keeps tubular morphology and has a larger specific surface area, the requirements of anode oxygen evolution reaction (OER) on rapid charge separation and transmission can be met, meanwhile, the light absorption range is widened, the solar energy utilization rate is increased, and a foundation is laid for efficient OER reaction.

The invention discloses stable silicon dioxide microspheres as well as a preparation method and application thereof. Mixing a sodium silicate diluent and an organic acid aqueous solution to form colloidal particles, and carrying out a sol-gel reaction to obtain silica sol; the preparation method comprises the following steps: in an air environment, throwing silica sol into water under stirring to form microspheres, injecting inorganic acid into the water at the same time, then injecting a sodium silicate diluent for reaction, and then adjusting the pH value of the system to 6-7; and aging, washing, drying and roasting to obtain the silicon dioxide microspheres. The preparation method comprises the following steps: mixing a sodium silicate diluent and an organic acid aqueous solution by an acid mixing method, granulating by air to form microspheres, and finally injecting inorganic acid to quickly remove heat, reduce pressure drop and maintain the state of the microspheres, thereby obtaining the stable silicon dioxide microspheres. The porous silicon dioxide microsphere with larger surface area and pore volume is obtained, has better catalytic performance when being used as a catalytic oxidation carrier, and has the advantages of high conversion rate and high stability.

The invention relates to the technical field of high polymer materials, and discloses a preparation method and application of polystyrene-divinyl benzene composite microspheres, and an environment-friendly solvent system, such as a water-based or non-toxic organic solvent, is adopted to replace a traditional organic solvent. The solvent pollution risk can be reduced by using water-phase emulsion polymerization, meanwhile, the recovery and treatment of the solvent are simplified, the surfactant is optimized, the low-toxicity and environment-friendly surfactant is selected for emulsion stabilization, and chemical substances harmful to the environment and the human body are prevented from being used. By optimizing a polymerization process, accurately controlling the crosslinking degree and introducing a green solvent and an environment-friendly surface modification method, the improved polystyrene-divinyl benzene composite microsphere overcomes some defects (such as high cost, non-uniform particle size, difficulty in controlling the crosslinking degree and the like) in the prior art; in addition, the method has wider application potential in a plurality of fields (such as coatings, medicines and catalysis), and has better environmental protection property, health safety and the like.

The present invention discloses a layered metal hydroxide composite catalytic material, its preparation method and application. The composite catalytic material comprises a carrier carbon nanotube and a metal hydroxide loaded on the carbon nanotube, and the metal is iron, cobalt and nickel. Preparation method: (1) Dissolve nickel salt, cobalt salt, iron salt and urea in an alcohol solution, stir evenly, then add carbon nanotubes, and continue to stir evenly to obtain a mixed solution; (2) Carry out a solvothermal synthesis reaction on the mixed solution obtained in step (1), filter, wash and dry after the reaction is completed to obtain the layered metal hydroxide composite catalytic material. The carbon nanotubes are introduced into the layered metal hydroxide in this composite catalytic material, reducing the precipitation of metal ions, avoiding the aggregation of hydroxides, improving the stability and catalytic activity of the catalytic material, and being used for activating persulfate to degrade organic pollutants, realizing the efficient activation of persulfate so as to improve the degradation rate of pollutants.

The invention discloses a preparation method of a carbon shell confinement type nickel-bismuth-titanium composite catalyst and application of the carbon shell confinement type nickel-bismuth-titanium composite catalyst in high alcohol synthesis, and belongs to the technical field of catalysts. The preparation method of the carbon shell confinement type nickel-bismuth-titanium composite catalyst comprises the following steps: dissolving nickel salt, titanium dioxide and citric acid in water to form a homogeneous solution; adding bismuth salt into the homogeneous solution, and drying to obtain a precursor; and roasting the precursor to obtain the carbon shell confinement type nickel bismuth titanium composite catalyst. The carbon shell confinement type nickel-bismuth-titanium composite catalyst provided by the invention shows excellent catalytic performance in a reaction system for synthesizing high-carbon alcohol through carbon-carbon coupling of water-phase alcohol molecules. According to the catalyst, the high-carbon alcohol yield can reach 45.04% while high organic phase selectivity is maintained, and compared with a traditional nickel-bismuth-based catalyst, the high-carbon alcohol yield is remarkably improved.

The invention relates to the technical field of activated carbon regeneration preparation, in particular to a denitration and desulfurization activated carbon catalyst preparation control method and system.The method comprises the steps that activated carbon is added into prepared steeping liquor, and the metal ion concentration in the steeping liquor and the steeping liquor microcirculation flow rate in the loading process are collected in real time based on a preset time interval; acquiring a decline rate parameter Nd of metal ion concentration and a liquid flow rate change rate parameter Ls; according to the metal ion concentration decline rate parameter and the liquid flow rate change rate parameter, a load uniformity grading rule is established, and a load uniformity grading result is obtained.According to the method, the metal ion concentration decline rate and the liquid flow rate change rate are obtained, the load state of the activated carbon is evaluated based on the two kinds of dynamic parameters, and the two kinds of dynamic parameters are combined; whether an abnormal state of too fast adsorption, local saturation or mass transfer lag exists in the loading process or not can be accurately represented from two dimensions of adsorption rate and liquid phase mass transfer.

The present invention relates to the technical field of heavy oil hydrodesulfurization, and discloses a hydrodesulfurization catalyst preparation process, which comprises: adding deionized water, a nickel source, a molybdenum source and a dispersant into a reaction container, stirring to obtain a metal solution, pouring into a container filled with gamma-Al2O3, impregnating, drying, and roasting to obtain the hydrodesulfurization catalyst. The dispersing agent contains a large number of nitrogen atoms and a plurality of carboxyl groups and hydroxyl groups, has very strong coordination chelation performance on nickel and molybdenum, improves the dispersity of nickel and molybdenum precursors, enables the nickel and molybdenum precursors to be uniformly impregnated into a gamma-Al2O3 carrier, and nickel oxide and molybdenum oxide are uniformly distributed in the gamma-Al2O3 carrier after calcination, so that the nickel and molybdenum oxide-modified gamma-Al2O3 composite material is prepared. The obtained hydrodesulfurization catalyst can expose more nickel-molybdenum catalytic active centers, effectively catalyzes and removes sulfur-containing substances such as thiophenes in straight-run diesel oil, shows a higher desulfurization rate, and improves the quality of oil products.

The invention relates to the technical field of catalyst preparation, and discloses a preparation method and application of a ruthenium / cerium oxide composite nanofiber catalyst, and the preparation method comprises the following steps: (1) adding cerium salt and P123 into a mixed solution of DMF (Dimethyl Formamide) and an alcohol solvent according to a molar ratio of 1: (0.1-0.4), stirring and mixing, and carrying out hydrothermal reaction at 160-180 DEG C for 4-12 hours to obtain a spinning solution; (2) performing electrostatic spinning on the spinning solution to obtain a cerium fiber precursor; (3) pre-oxidizing the cerium fiber precursor, and then carrying out aerobic roasting to obtain a cerium oxide nanofiber carrier; and (4) dipping the cerium oxide nanofiber carrier in a ruthenium salt solution, drying, and performing hydrogen reduction to obtain the catalyst. According to the invention, the ruthenium / cerium oxide composite nanofiber catalyst with a unique cavity-containing nanofiber form is prepared by adopting an electrostatic spinning technology, and the ruthenium / cerium oxide composite nanofiber catalyst has good catalytic selectivity and stability in an ammonia decomposition reaction.

The invention discloses a supported noble metal catalyst for a wet catalytic oxidation reaction and a preparation process of the supported noble metal catalyst, and belongs to the technical field of catalysts for wastewater treatment. The noble metal catalyst comprises a modified titanium dioxide carrier, transition metal and noble metal, the transition metal and the noble metal are loaded on the modified titanium dioxide carrier, the modified titanium dioxide carrier is modified by adopting rare earth metal, the total loading amount of the noble metal and the transition metal is 0.5-0.7 wt%, and after the titanium dioxide carrier is subjected to rare earth modification, the noble metal and the transition metal are loaded on the modified titanium dioxide carrier. The titanium dioxide carrier transition metal forms stable chemical bonds, precipitation of the transition metal in the use process is reduced, and meanwhile, the transition metal and the noble metal are matched with each other, so that the catalytic activity of the noble metal catalyst is improved.

The invention discloses an argillaceous sandstone uranium ore leaching method and device based on a recyclable activation material, and relates to the technical field of uranium ore resource development. The preparation method of the recyclable activated material comprises the following steps: adding WS2 and Fe3O4 into an aqueous solution, uniformly stirring, adding a boron-containing compound, a fluorine-containing precursor aqueous solution and a nitrogen-oxygen-containing compound, uniformly stirring, heating, stirring for reaction, filtering, washing and drying to obtain a precursor; and calcining the precursor in a protective atmosphere to obtain F / O co-doped h-BN / WS2 / Fe3O4 which is used as a recoverable activation material. The obtained recoverable activated material has good catalytic performance, can be widely applied to preparation of a catalyst for leaching uranium from argillaceous sandstone uranium ore, and can generate strong turbulence, secondary circulation and near-wall shear force for high-viscosity ore pulp and efficiently excite the catalytic activity of a piezoelectric material in cooperation with the device provided by the invention.

The invention belongs to the technical field of denitration catalysts, and discloses a CO-SCR denitration catalyst and a preparation method and application thereof. The preparation method comprises the following steps: (1) putting honeycomb cordierite into a muffle furnace for preliminary calcination to obtain a carrier; (2) immersing the carrier into a mixed solution containing an aluminum source and an alkaline nitrogen source for hydro-thermal treatment, taking out the carrier after hydro-thermal treatment, and washing and drying to obtain a surface modified carrier; (3) preparing a bottom layer coating solution containing catalyst powder and a first pore-forming agent; preparing a surface layer coating solution containing catalyst powder and a second pore forming agent; wherein the average particle size of the first pore-forming agent is larger than that of the second pore-forming agent; (4) immersing the surface modified carrier into the bottom layer coating liquid for coating, carrying out primary drying, then immersing the surface modified carrier into the surface layer coating liquid for coating, and carrying out drying treatment to obtain a catalyst precursor; and (5) calcining the catalyst precursor to obtain the CO-SCR denitration catalyst.

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 relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

To provide a technique to improve performance of a porous ceramic structure.SOLUTION: A porous ceramics structure comprises, as a principal component, a proton-conductive composite oxide and having multiple pores, the structure containing no binder, with a specific surface area exceeding 25 m2 / g and a compressive strength exceeding 30 N / mm2.SELECTED DRAWING: Figure 1

The present invention belongs to the field of industrial catalysts, and particularly relates to a silver catalyst, a preparation method thereof and an application. The method comprises the following steps: 1) impregnating an alumina support with an organic amine solution containing a silver compound; 2) leaching to remove the excess impregnating solution and centrifuging the separated solid particles of the alumina support; 3) impregnating the centrifuged solid particles with an alcohol solvent miscible with water; 4) leaching to remove the excess alcohol solvent and separating the solid particles of the alumina support; 5) heating and activating the obtained solid particles to prepare the silver catalyst. The difference in silver loading between the inside and outside of the silver catalyst prepared by the present invention is reduced, and the active component silver metal is more uniformly loaded on the support. When used in the reaction of ethylene oxidation to produce ethylene oxide, it has improved activity and stability.

The invention discloses a catalyst for dealkylation in a chlorine-containing environment as well as a preparation method and application of the catalyst, and belongs to the technical field of catalyst reaction. The catalyst comprises a carrier and an active component, wherein the carrier comprises ZrO2 and MgFeO4; the active component comprises an auxiliary agent and a noble metal component, the auxiliary agent comprises a V2O5-WO3 composite oxide and a CeO2-MnO2 composite oxide, and the noble metal component comprises at least three of rhodium, ruthenium, platinum, palladium and gold. The noble metal components grow in mesopores of the carrier in a confined manner, and the auxiliaries with dechlorination and catalytic oxidation functions are uniformly distributed on the surface of the carrier, so that a two-step catalytic strategy of dechlorination and oxidation of chlorine-containing waste gas is realized, the poisoning phenomenon of the catalyst is effectively avoided, and an excellent catalytic effect is formed. Moreover, the catalyst is stable in property, still keeps an excellent catalytic function after being used for a long time, and is higher in practicability and better in economical efficiency.

The invention provides a copper-nickel diatom modified indium-based catalyst and a preparation method thereof, and a method for catalyzing coal bed gas oxidation to prepare methanol. The catalyst is a copper-nickel diatom site loaded indium oxide nanotube, a carrier of the catalyst is the indium oxide nanotube, and an active source is a copper-nickel diatom site constructed by a specific photodeposition sequence. According to the method, methane in the coal bed gas can be converted into methanol, compared with the prior art, the methanol yield is higher, effective utilization of clean energy can be achieved, and the method has good application prospects.

The invention provides an aluminum-doped NiCoCe catalyst, a preparation method thereof and application of the aluminum-doped NiCoCe catalyst in low-temperature CO2 hydrogenation methane preparation reaction, the preparation method comprises the following steps: (1) dissolving nickel nitrate, cobalt nitrate, cerium nitrate, aluminum nitrate and an alkaline precipitator in deionized water, and fully stirring the solution at room temperature to obtain a solution A; (2) putting the solution A into a reaction kettle, and crystallizing the mother liquid at a constant temperature for a certain time to obtain a solid-liquid mixture B; (3) centrifuging and washing the solid-liquid mixture B in the step (2) to obtain a precipitate C; (4) drying the precipitate C in the step (3) to obtain a precursor D; and (5) reducing and passivating the precursor D in the step (4) to obtain the catalyst. The catalyst prepared by the invention effectively solves the problem of low CO2 conversion rate in low-temperature CO2 methanation reaction, lattice distortion is promoted by introducing the Al element, the migration ability of lattice oxygen is increased, and the formation of a large number of oxygen vacancies is beneficial to improving the oxidation-reduction property of the catalyst.

Disclosed are an alumina porous material and its preparation and application. The porous material has substantially orderly distributed spherical or quasi-spherical cavities inside, the cavities have an average diameter of 100-500 nm, and at least a part of adjacent cavities are connected through mesopores. The alumina porous material is suitable for being used as a support for preparing a heavy residue hydroprocessing catalyst, or as a support for catalysts used in other macromolecular catalytic processes.

The invention relates to the technical field of catalyst carriers, and particularly discloses a preparation method of a high-bulk-ratio double-peak pore-tooth spherical alumina carrier. The preparation method of the high-bulk-ratio bimodal pore-tooth spherical alumina carrier comprises the following steps: taking mesoporous pseudo-boehmite, macroporous pseudo-boehmite, a composite molding aid, a soft template pore-enlarging agent and a hard template pore-enlarging agent as raw materials, performing dry mixing for 10-20 minutes under the vacuum degree of-0.06 to-0.08 MPa, then adding a peptizing agent and deionized water, and performing stirring and kneading to obtain paste; and extruding the paste into strips, dicing, rounding, drying and roasting to obtain the alumina carrier. According to the preparation method disclosed by the invention, the tooth spherical alumina carrier with high bulk ratio and double-peak pores is obtained.

In view to the technical problems of low recovery rate of metal elements in metallurgical slag and the problem of inefficient recovery of residual heat of metallurgical slag generated by traditional technology, the present application provides a technology and method for preparing microporous-rich metallurgical slag particles based on carbon etching and efficiently recovering residual heat of metallurgical slag in coal gasification, mainly including four parts of granulation system, etching powder adhesion system, etching gasification system and screening separation system which are sequentially connected, and mainly through four steps of molten metallurgical slag granulation, etching powder adhesion, etching gasification reaction, screening and separation, the efficient recovery and utilization of residual heat of metallurgical slag and the high value conversion of metallurgical slag particle products are realized. The utilization value of metallurgical slag particles is increased by 10-15 times through the system.

The invention relates to a catalyst for preparing 1, 4-cyclohexanedimethanol (CHDM) by catalyzing dimethyl terephthalate (DMT) hydrogenation and a preparation method thereof, non-noble metals nickel (Ni) and copper (Cu) are used as active components, silicon dioxide is used as a carrier, ammonia water in a solution is evaporated out after ammonia water precipitation, and a catalyst sample is obtained. The active components mainly adopt metal Ni and Cu elements with relatively low price, compared with noble metals such as ruthenium, rhodium, platinum and the like, the use cost of the catalyst is greatly reduced, the bimetallic catalyst Ni-Cu-SiO2 is prepared by an ammonia distillation method, 1, 4-cyclohexanedimethanol can be prepared by catalyzing dimethyl terephthalate hydrogenation by a one-pot method, and the catalyst has a wide application prospect. The preparation cost of the catalyst is relatively low, the dispersity and stability of the catalyst are improved by adopting an ammonia distillation method, the CHDM is prepared by adopting a one-pot method, the energy consumption is further reduced, the reaction procedure is simplified, and the preparation method is simple and is easy to amplify to industrial production.

The invention relates to an alkylated crown ether synthesis method which comprises the following steps: dissolving a benzo crown ether substrate in a solvent, adding a carbon supported Rh catalyst, and uniformly stirring; under a stirring condition, introducing hydrogen, and carrying out a hydrogenation reaction; and filtering, recovering the carbon supported Rh catalyst, and evaporating to remove the solvent to obtain the alkylated crown ether. Compared with the prior art, hydrogenation of the benzocrown ether substrate is carried out based on the carbon-supported Rh catalyst, and the method has the advantages of low reaction temperature, moderate pressure and rapid reaction, and is suitable for a large-scale production process. Meanwhile, the carbon carrier can be conveniently removed through incineration, chemical recovery of active metal is facilitated, and reduction of the synthesis cost is facilitated.

The invention discloses a petal-shaped aluminum oxide material and a preparation method and application thereof, and belongs to the technical field of nanomaterials, and the preparation method comprises the following steps: dissolving sodium aluminate in water to obtain a sodium aluminate solution, adding a surfactant for dispersion, then quickly adding ethyl acetate to reduce the concentration of hydroxyl in the solution, and stirring to obtain the petal-shaped aluminum oxide material. The preparation method comprises the following steps: adding sodium aluminate into a reaction kettle to promote hydrolytic equilibrium of the sodium aluminate to move towards the direction of generating aluminum hydroxide, promoting generation of the aluminum hydroxide, filtering out aluminum oxide, washing, drying, and finally roasting in an air or nitrogen atmosphere to obtain the petal-shaped aluminum oxide material. The surface of the petal-shaped aluminum oxide material prepared by the method is in a regular petal shape, the petals are mutually stacked to form a regular pore structure, the BET specific surface area of the petal-shaped aluminum oxide material is 448m < 2 > / g, the pore diameter is concentrated, and the pore channel structure has relatively high uniformity, so that the petal-shaped aluminum oxide material shows better selectivity and stability; the catalyst can be applied to the fields of petrochemical engineering, environment-friendly catalysis, energy catalysis, gas adsorption or water treatment and the like.

The invention relates to the technical field of high-temperature desulfurization, and provides an inhibitor for removing SO2 and dioxin from high-temperature flue gas and a preparation method thereof.The inhibitor is prepared from, by weight, 48-52 parts of composite adsorbent and 49-51 parts of desulfurizing agent; and 4-10 parts of a catalyst. The catalyst provided by the invention solves the limitation that similar catalysts on the market are poor in high-temperature stability and can oxidize SO2 into SO3, and the inhibitor for removing SO2 and dioxin from high-temperature flue gas is formed by matching the catalyst with the composite adsorbent and the desulfurizing agent, so that the inhibitor has the effect of efficiently removing SO2 and dioxin from high-temperature flue gas.

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 and application of an eight-membered ring aluminum-rich mordenite nanosheet. The preparation method comprises the following steps: respectively weighing a silicon source, inorganic alkali, an aluminum source, a template agent Te, water and a metal additive Me according to a molar ratio of 1: (0.1-0.3): (0.02-0.08): (0.1-0.3): (10-40): (0.01-0.1); mixing and stirring the raw materials in an ice-water bath to prepare initial gel; putting the initial gel into a hydrothermal reaction kettle, carrying out hydrothermal crystallization in a drying box, and then centrifuging, filtering and drying to obtain a sodium mordenite molecular sieve; roasting the sodium mordenite molecular sieve to remove the organic template agent; carrying out ammonium ion exchange on the roasted mordenite molecular sieve in a water bath kettle to obtain an ammonium type mordenite molecular sieve; carrying out roasting treatment on the ammonium type mordenite molecular sieve to obtain a hydrogen type octatomic ring aluminum-rich mordenite nanosheet; the eight-membered ring aluminum-rich mordenite nanosheet prepared by the preparation method disclosed by the invention can exert excellent performance in a reaction for preparing acetic acid or methyl acetate through carbonylation of methanol or dimethyl ether.