36 results about "Catalytic particle" patented technology

The invention discloses a plasma hydrodynamic cavitation aeration coupled piezoelectric catalysis organic wastewater treatment system and method. The system comprises a wastewater tank, a water pump, a Venturi tube hydrodynamic cavitator, a catalytic oxidation reactor, a piezoelectric particle separator, a piezoelectric catalytic particle bin, a low-temperature plasma generator and an air pump. By coupling piezoelectric catalysis, pressure pulsation mechanical energy generated by hydrodynamic cavitation is converted into chemical energy for driving the piezoelectric effect, on one hand, pollutants are directly oxidized, and on the other hand, plasma by-product H2O2 is efficiently converted into. OH with strong oxidizing property, so that cooperation with plasma advanced oxidation is formed, and the pollutant removal efficiency is improved. The pollutant degradation energy efficiency and the energy utilization rate of the system are greatly improved. Meanwhile, the system realizes efficient recovery and cyclic utilization of the magnetic piezoelectric catalytic particles through the magnetic separation type piezoelectric particle separator, so that secondary pollution of the catalyst is fundamentally avoided.

The invention discloses a width gradient tungsten disulfide nanobelt, a preparation method thereof and an application of the width gradient tungsten disulfide nanobelt in a self-driven photoelectric detector, a Ni film is deposited on a substrate and is annealed to form catalytic particles, and a chemical vapor deposition system is utilized to accurately control the temperature gradient between tungsten trioxide in a central temperature zone and a growth substrate in a downstream temperature zone, so that the width gradient tungsten disulfide nanobelt is obtained. And the solid sulfur source is propelled at a constant rate, the dynamic change of the sulfur / tungsten atomic ratio in the reaction environment is regulated and controlled, and a growth mode is guided to be converted from a gas-liquid-solid mechanism to a gas-solid mechanism, so that controllable preparation of the tungsten disulfide nanobelt with the width continuously and progressively decreased in the axial direction is realized. The width of the nanobelt gradually changes from 150-500 nm to 50-120 nm, the length of the nanobelt reaches 3-12 [mu] m, and the nanobelt has an armchair edge and a 3R phase stacking structure. A self-driven photoelectric detector constructed based on the nanobelt realizes high-sensitivity detection of 532 nm laser under zero bias voltage, the responsivity reaches 5.04 A / W, the detectivity reaches 3.23 * 10 < 12 > Jones, and the nanobelt shows important application value in the fields of optical signal detection, optical switches and wireless optical communication.

The invention relates to a Pt-Pd composite electrode and a preparation method and application thereof. The preparation method comprises the following steps: placing a conductive substrate in an electro-deposition liquid, taking the conductive substrate as a working electrode, sequentially carrying out first electro-deposition and second electro-deposition, and forming a Pt-Pd composite catalyst layer on the surface of the conductive substrate to prepare the Pt-Pd composite electrode, the electro-deposition liquid comprises a platinum source, a palladium source and a supporting electrolyte. The Pt-Pd composite electrode is prepared through cooperation of Pt and Pb, the structural stability of the electrode is remarkably improved, meanwhile, layer-by-layer growth of catalytic particles is achieved in the mode that first electrodeposition and second electrodeposition are combined, it is guaranteed that catalytic active sites are fully exposed, it is also guaranteed that the binding force between a plating layer and a substrate is extremely high, and the service life of the plating layer is prolonged. The electrode is used for electrochemically synthesizing ammonia, has relatively high Faraday efficiency, is particularly suitable for long-term operation under high current density, and has a good industrial application prospect.

The invention belongs to the technical field of catalysts, and particularly relates to a monolithic carbon monoxide adsorption catalyst and a preparation method thereof. The monolithic carbon monoxide adsorption catalyst is loaded with metal catalytic particles, and the metal catalytic particles comprise copper particles, manganese particles and cerium particles; a carrier of the integral carbon monoxide adsorption catalyst is coated with gamma-aluminum oxide, and the catalyst is also loaded with lanthanum oxide. The monolithic carbon monoxide catalyst provided by the invention is relatively high in sulfur resistance and water resistance.

The invention relates to the technical field of printed circuit boards, and discloses a process method for optimizing a copper lattice to improve the binding force of a plating layer, which comprises the following steps of: glue residue removal treatment: carrying out glue residue removal treatment on a drilled printed circuit board to form a roughened structure on the surface of a hole wall; activating treatment: adsorbing palladium catalytic particles on the coarsened pore wall surface to form a uniformly distributed catalytic center; and chemical copper deposition: immersing the activated plate in a chemical copper solution, controlling the reaction temperature to be 41-45 DEG C, maintaining the concentration of copper ions, alkali and a reducing agent through automatic compensation and liquid mixing, and depositing on the hole wall to form an initial copper layer. The technological method for optimizing the copper lattice to improve the coating binding force aims at solving the problems that in high-density interconnection and high-speed and high-frequency printed circuit board manufacturing, due to the fact that a traditional chemical copper plating technology lacks dynamic regulation and control capacity, the coating binding force is insufficient, the lattice structure is loose, and uniformity is poor.

The invention discloses a flue gas denitration agent which comprises the following components in percentage by weight: 30%-50% of organic amine, 45%-60% of polyol, 1%-5% of bio-oil, 0.2%-0.5% of an emulsifier, 0.1%-0.2% of a nanoparticle catalyst and 0.05%-0.1% of a bactericide, and relates to the technical field of flue gas treatment. According to the flue gas denitration agent and the denitration process thereof, various components such as organic amine, polyol, bio-oil, an emulsifier, a nanoparticle catalyst and a bactericide are compounded, all the components have a synergistic effect and give full play to respective advantages, the organic amine serves as a reducing agent to provide a nitrogen source, the polyol plays a role in dispersion and stabilization, and the bio-oil has a synergistic effect. The bio-oil improves the local cracking temperature and promotes the denitration reaction, the emulsifier enables all the components to form a uniform microemulsion structure, the nanoparticle catalyst provides more active sites and improves the reaction rate, the bactericide guarantees the storage stability of the denitration agent, the nano catalytic particles serve as the core, a multi-layer distributed microemulsion structure is formed, and the denitration effect is improved. And uniform distribution of liquid drops in the spraying process is ensured.

A process for fabricating a circuit board uses a catalytic dielectric core having catalytic particles, a foil top surface, and a thin foil bottom surface with a foil backing of sufficient thickness to absorb heat from a laser drilling operation to prevent the penetration of the thin foil bottom surface during laser drilling. A sequence of steps including a laser drilling step, removing the foil backing step, electroless plating step, patterned resist step, electroplating step, resist strip step, tin plate step, and copper etch step are performed, which provide dot vias of fine linewidth and resolution.

This invention discloses a method for preparing a magnetic nanofiber tubular membrane based on the antifouling function of separable magnetic particles, comprising the following steps: 1) thoroughly mixing equal volumes of iron salt solution and fumaric acid solution and then subjecting the mixture to ultrasonic treatment, followed by a hydrothermal reaction; 2) thoroughly mixing the solid product obtained in step 1) with a sulfiding agent-ethanol solution at a certain mass ratio, and then continuing the hydrothermal reaction to obtain Fe3S4 magnetic catalytic particles; 3) weaving polyester fibers into a braided tube and nesting it on axially stacked magnetic tubes to form a magnetic braided tube; 4) dissolving the fiber-forming polymer in a solvent to obtain a uniform and stable spinning solution; using the magnetic braided tube obtained in step 3) as a receiver, the spinning solution obtained in step 4) is spun into a magnetic nanofiber tubular membrane using electrospinning technology; 6) loading the magnetic catalytic particles obtained in step 2) onto the surface of the membrane obtained in step 5), thereby obtaining the Fe3S4 / magnetic nanofiber tubular membrane.

The application discloses a kind of photo-thermal synergic self-heating carbon capture and in-situ conversion method and device, it is related to flue gas carbon dioxide capture and resource utilization technical field, wherein the method includes: the flue gas containing carbon dioxide is passed into the adsorption tower equipped with core-shell type photo-thermal adsorption catalytic particles, and carbon dioxide is adsorbed by particle core layer at normal temperature;After core layer adsorption saturation, adsorption tower is switched to closed cycle, and the light focusing system is started to focus sunlight, so that shell layer photo-thermal material generates plasmonic resonance effect and forms local high temperature, drives core layer to desorb carbon dioxide;Desorbed carbon dioxide and hydrogen occur hydrogenation reaction on the surface of shell layer catalyst, and in-situ generate liquid formic acid and release reaction heat;Relies on the heat to build self-heating cycle, auxiliary adsorbent is completely regenerated, collects tower bottom liquid formic acid, equipment is switched back to adsorption mode, and complete single-tower complete working cycle.The application realizes carbon dioxide adsorption in-situ conversion by photo-thermal coupling self-heating cycle, and reduces regeneration energy consumption.

The invention discloses an aquatic feed processing waste gas treatment device coupled with spraying and catalytic ozonation, and belongs to the technical field of feed processing, the aquatic feed processing waste gas treatment device comprises at least two catalytic oxidation towers, the two catalytic oxidation towers are arranged in series along a waste gas conveying direction; the induced draft fan is arranged at the downstream of the last-stage catalytic oxidation tower; wherein a wet treatment area and a dry treatment area are sequentially arranged in the catalytic oxidation tower in the waste gas conveying direction; a spraying pipeline and a first ozone injection pipeline are arranged in the wet treatment area; and at least one group of catalytic oxidation components and a second ozone injection pipeline are fixedly arranged in the dry treatment region along the waste gas conveying direction. The device adopts a wet spray oxidation and dry ozone catalysis two-stage coupling process, effectively deals with complex working conditions of aquatic feed waste gas, physically isolates a mixing cavity from a catalytic oxidation cavity, fully pre-mixes ozone and waste gas, periodically sucks by a piston, forcibly pushes mixed gas to penetrate catalytic particles, remarkably strengthens gas-solid mass transfer and improves catalytic efficiency.

The invention belongs to the technical field of carriers, and particularly relates to a catalyst for preparing low-carbon olefin from CO2 as well as a preparation method and application of the catalyst. Based on a new idea of carbon dioxide capture-conversion coupling, a series of bifunctional catalytic particles K / BayFeO3 (y = 0.6-1.2) with an oxygen carrying function are constructed through potassium / barium coordination and barium regulation strategies. Rich oxygen vacancies on the surface promote CO2 adsorption and dissociation, and the catalytic activity is improved; the strong electron donating performance under K / Ba synergism promotes conversion of intermediate species to olefin, inhibits excessive hydrogenation, and reduces methane. The selectivity of low-carbon olefin C2 =-C4 = is 57% or above, and the alkane ratio O / P is 7.36 or above. The K / BayFeO3 prepared by the method takes perovskite as a structural framework, is excellent in stability and is not inactivated after being continuously used for more than 500 hours, and the catalytic performance is in a stable increasing trend along with the prolonging of the reaction time.

The invention relates to the technical field of fire coal aids, in particular to a composite fire coal aid as well as a preparation method and application thereof in pulverized coal combustion. The composite fire coal additive is prepared from the following components in percentage by mass: 9-22% of a transition metal salt composite solution, 10-16% of an organic polymer surfactant, 5-12% of an alkaline buffer and chelating agent synergistic system, 2-7% of nanoscale active catalytic particles and the balance of deionized water, the prepared composite fire coal additive is atomized and sprayed on the surfaces of coal particles according to 0.4-0.9% of the mass of coal, and then the coal is fed into a gasification furnace for combustion gasification reaction. According to the invention, the activation energy of coal combustion can be obviously reduced, the combustion reaction rate can be accelerated, the coal can be more quickly and fully combusted in the gasification furnace, the combustion efficiency of the coal is improved, and the combustion rate of the coal can be improved by 8-15% compared with the combustion rate of the coal without using the auxiliary agent, so that the output of combustible gas is increased, and the energy conversion efficiency of the gasification furnace is improved.

The utility model discloses an organic waste gas treatment combustion heat recovery device, which relates to the technical field of organic waste gas, and comprises a heating bin, a rotating motor and a spiral pipe, the top of the heating bin is provided with the rotating motor, the output end of the rotating motor is connected with a rotating shaft, and the outer side of the heating bin is sleeved with the spiral pipe. A shell is arranged on the outer side of the spiral pipe, an air inlet pipe is arranged at one end of the spiral pipe, a pump body is installed on one side of the heating bin, a conveying pipe is connected to one side of the pump body, a water bin is connected to one end of the conveying pipe, a preheating bin is arranged in the water bin, and a control motor is installed at the top of the preheating bin; waste gas generated after combustion is conveyed into the spiral pipe in the shell through the gas inlet pipe and conveyed into the heating bin through the water inlet pipe, water in the heating bin is heated, and therefore on one hand, hot water can preheat catalytic particles and can clean waste gas treatment equipment, and practicability is improved.

Procedures for treating NO x and soot-containing engine exhaust stream, comprising: the contacting of the engine exhaust stream with an oxidation catalyst comprising at least one platinum group metal selected from platinum, palladium or a combination of platinum and palladium, wherein the platinum group metal is applied to a high surface area primer component selected from aluminum oxide, zeolite, silicon dioxide, non-zeolite silicon dioxide-aluminum oxide, cerium oxide, zirconia, titanium dioxide or a mixed or compound oxide containing both cerium oxide and zirconia, wherein the oxidation catalyst is adapted to release a gas stream having a NO to NO2 ratio of 4:1 to 1:3 per volume; the contacting of the gas stream in the presence of a reducing agent with a flow monolith with a first SCR catalyst composition loading and a first volume to generate an intermediate gas stream; the contacting of the intermediate gas stream with a closely coupled catalytic particulate filter with a second SCR catalyst composition loading and a second volume, wherein the second volume is at least twice the first volume, in order to capture some of the soot and produce a clean gas stream; the oxidation of the soot component at a soot oxidation temperature to renew the catalytic particulate filter; Heating the catalytic tightly coupled flow monolith to an SCR start-up temperature before the catalytic particulate filter is heated to an SCR start-up temperature; and Maintaining, under low load conditions, the soot oxidation temperature of the catalytic particulate filter for a longer period of time, compared to a catalytic particulate filter with a volume equal to the combined first and second volumes.

The invention discloses a tail gas catalytic treatment device, a processing method thereof and a fuel cell dehydrogenation system, and relates to the technical field of tail gas treatment. The tail gas catalytic treatment device comprises a catalytic module; the catalytic module comprises a plurality of catalytic honeycomb carrier layers sequentially arranged in the preset exhaust direction and catalytic particle layers located between every two adjacent catalytic honeycomb carrier layers. The catalytic module is of a sandwich type segmented structure formed by a catalytic honeycomb carrier layer and a catalytic particle layer, tail gas alternately flows through the catalytic honeycomb carrier layer and the catalytic particle layer, the advantages of the two catalytic structures can be fully played, and high mass transfer efficiency and high catalytic efficiency are achieved. According to the multi-layer catalytic layer, when the concentration of the to-be-treated component suddenly rises, the reaction load is distributed to each catalytic layer, so that the load amplification of a single catalytic layer can be reduced, each catalytic layer can operate in a safe operation interval, and the conversion rate of the to-be-treated component in the tail gas is ensured.

The invention provides a coil pipe heat exchange system, a heat exchange method and a solid hydrogen storage and desorption system.The coil pipe heat exchange system comprises a coil pipe heat exchange structure, the inner wall of the coil pipe heat exchange structure is used for making contact with the outer wall of a solid hydrogen storage device, and the coil pipe heat exchange structure sequentially comprises a hydrogen-oxygen reaction area, a heat exchange area and a tail gas heat exchange area in the fluid flowing direction; the hydrogen-oxygen reaction zone and the heat exchange zone are filled with mixed bed layers, and the mixed bed layers comprise hydrogen-oxygen reaction catalytic particles and high-thermal-conductivity particles; the space proportion of the hydrogen-oxygen reaction catalytic particles and the high-thermal-conductivity particles in the mixed bed layer is configured based on the hydrogen concentration parameter in the inlet gas of the solid hydrogen storage device; wherein the volume ratio of the high-thermal-conductivity particles in the inlet area of the mixed bed layer is configured to be increased along with the increase of the hydrogen concentration. The hydrogen-oxygen reaction uniformly occurs along the tube pass, the solid hydrogen storage device is uniformly heated in the axial direction and the radial direction, the temperature difference of the hydrogen storage alloy bed layer is small, and thermal stress is reduced; according to the embodiment of the invention, filling of catalytic particles is reduced, and the cost is saved.

The invention belongs to the technical field of carbon dioxide resource utilization, and particularly relates to a doped hydrotalcite-derived composite metal oxide catalyst (M / CuMgFe) and a preparation method and application thereof. The doped hydrotalcite-derived composite metal oxide catalyst comprises catalytic particles and a hydrophobic layer coated on the surfaces of the catalytic particles, and the catalytic particles comprise a magnesium-iron hydrotalcite-like carrier and copper loaded on the magnesium-iron hydrotalcite-like carrier. The doped hydrotalcite-derived composite metal oxide catalyst provided by the invention can significantly improve the conversion rate of carbon monoxide preparation through carbon dioxide hydrogenation inversion at a low temperature.

The invention discloses a composite adsorption filler for sewage deodorization and purification and a preparation method thereof, belongs to the technical field of sewage treatment filter materials, and aims to solve the technical problem that the purification performance and the mechanical performance of a composite adsorption filter material for sewage treatment in the prior art need to be further improved. According to the composite filter material prepared by the preparation method disclosed by the invention, the quaternized silica skeleton particles, the N-S-P doped porous hard carbon particles and the multi-metal oxide adsorption catalytic particles are synergistically constructed, so that the material forms a systematic functional network in the aspects of a microcosmic pore channel structure, interface charge regulation and control and multivalent reaction sites; according to the structural system, rapid adsorption, directional migration and efficient conversion of pollutants can be achieved at the same time, a continuous multi-stage purification path is constructed, and in addition, the composite structure endows the material with good mechanical stability and chemical tolerance, so that the material keeps stable purification capacity in long-term operation.

The invention discloses a preparation method and application of an adhesive with a catalytic water dissociation function, and belongs to the field of new energy, the preparation method of the adhesive with the catalytic water dissociation function comprises the following steps: S1, fully stirring acrylic acid, methyl acrylate, N, N-methylenebisacrylamide, an emulsifier and pure water, raising the temperature to 40-60 DEG C, and stirring for 20-30 minutes; the preparation method comprises the following steps: S1, dissolving an initiator into pure water to obtain a solution A, dissolving a metal ion compound into pure water to obtain a solution B, and S3, dropwise adding the solution A and the solution B into the monomer solution in a slow and continuous dropwise adding manner for 0.5-2 hours, heating to 50-75 DEG C, and reacting for 1-5 hours to obtain the adhesive with the catalytic water dissociation function. According to the prepared adhesive, through internal active catalytic particles, the activation energy barrier of water molecule dissociation is remarkably reduced, the dissociation efficiency of water in the electrolytic hydrogen production process is improved, and then the hydrogen production energy efficiency is improved.

A particulate filter, a gasoline engine emission treatment system comprising the particulate filter and a method for treating an exhaust from a gasoline engine, wherein the particulate filter comprises: a substrate, comprising a plurality of porous walls extending longitudinally to form a plurality of parallel channels extending from an inlet end to an outlet end, wherein a quantity of the channels are inlet channels that are open at the inlet end and closed at the outlet end, and a quantity of channels are outlet channels that are closed at the inlet end and open at the outlet end; an in-wall TWC coating in the inlet channels and the outlet channels, comprising a platinum group metal component, an alumina-based refractory metal oxide and an oxygen storage component, and wherein the in-wall TWC coating is free of any individual zirconium species and barium species.

The invention belongs to the technical field of carriers, and particularly relates to low-methane-yield oxygen carrying-catalysis bifunctional particles as well as a preparation method and application thereof. Based on a new idea of carbon dioxide capture-conversion coupling, a series of bifunctional catalytic particles K / AFeO3 (A = Mg, Ca and Sr) with an oxygen carrying function are constructed through K / A synergy and A regulation strategies. The catalyst can promote conversion of intermediate species to olefins, inhibit excessive hydrogenation, and reduce methane and CO. The selectivity of low-carbon olefin C2 =-C5 = is 64% or above, and the average selectivity of CH4 is 1t; and the CH4 selectivity of K / CaFeO3 can be as low as 19.61%, especially K / CaFeO3. The K / AFeO3 prepared by the invention takes perovskite as a structural framework, the stability is excellent, and the catalytic performance is in a stable increasing trend along with the prolonging of the reaction time.

This invention discloses a periclump biocarrier for virus enrichment and elimination in aquaculture wastewater and its preparation method. The periclump biocarrier has a core-shell structure, with a core consisting of a signal layer loaded with catalytic particles, and an outer shell consisting of a support layer. The signal layer is a gel dispersed with cyclic diguanosine monophosphate, the catalytic particles are nanocarriers loaded with sodium percarbonate and potassium ferrocyanide, and the support layer is a porous polymer. This invention optimizes the virus enrichment capacity of biofilms and enhances in-situ elimination efficiency by integrating signal molecule regulation and free radical synergistic inactivation mechanisms. This periclump biocarrier not only improves the targeting and response speed of virus treatment but also overcomes the environmental risks and cost bottlenecks of traditional methods, providing an innovative solution for the safe management of aquaculture water bodies, and can achieve a virus inactivation rate of ≥99.9%.

The invention relates to a bubble-free electrochemical laundry detergent and a preparation method thereof, and relates to the technical field of cleaning. The laundry detergent disclosed by the invention is prepared from various raw materials such as zirconium oxychloride and terephthalic acid according to specific parts by weight through unique process steps such as preparation and mixing of metal-organic framework catalytic particles with special structures, biodegradable ionic liquid electrolyte and a multifunctional composite additive. The prepared laundry detergent has the advantages of being efficient, clean, environmentally friendly, safe, multifunctional and the like, convenient rinsing is achieved by means of bubble-free design, all the components cooperate to guarantee stability, the preparation process is scientific and rigorous, it is guaranteed that the product performance is excellent, stable and reliable, and the requirement of the market for novel laundry detergents is met.

A catalyzed particulate filter is a filter that is arranged in an exhaust passage of an engine and captures particulate matter in exhaust gas, and includes a support that is porous, and a catalytic layer provided on a wall surface of the support, and the catalytic layer has a density of 2.0 g / cm3 or higher.

To provide a technique capable of improving air permeability of a catalyst layer.SOLUTION: First, a catalytic ink is prepared by mixing catalytic particles, solvents and ionomers (S1). Next, the catalytic ink is applied to the surfaces of the electrolytic membrane (S2). Thereafter, the catalytic ink applied to the electrolytic membrane is dried (S3). Thus, a catalyst layer is formed on the surface of the electrolyte membrane. The diameters of the catalytic particles are not less than 50nm and not more than 300nm. The dried catalyst layer has aggregated portions in which a plurality of catalyst particles are aggregated, and void portions formed between the aggregated portions. This void portion can improve the gas permeability of the catalyst layer.SELECTED DRAWING: Figure 3

The invention discloses a fuel oil carbon deposition inhibitor and a manufacturing method thereof, gasoline and a preparation method thereof, and belongs to the technical field of engine fuel oil additives, the fuel oil carbon deposition inhibitor comprises: a catalytic core, the catalytic core is inert nanoparticles having catalytic cracking ability to a carbon deposition precursor; the catalyst comprises a catalytic core and a dual-response shell, the dual-response shell wraps the catalytic core, the dual-response shell is a polymer and at least comprises a thermosensitive unit, a piezoelectric unit and an anchoring unit, and the anchoring unit is provided with an anchoring functional group grafted or adsorbed to the metal surface. The technical problems that in an existing fuel oil detergent technology, targeting is not high, the utilization rate of effective components is low, and active and long-acting protection cannot be achieved in a key area are solved. Accurate, active and long-acting inhibition of oil nozzle carbon deposition is realized by providing the piezoelectric-thermoelectric dual response core-shell structure catalytic particles.

This invention relates to a method for preparing a low-temperature denitrification catalyst using industrial by-products. The method involves mixing and grinding industrial solid waste vanadium-titanium smelting slag and coking plant dust, which is then used as a catalyst carrier. Metal ions from by-products such as electroplating sludge and electrolytic cation mud are precipitated and enriched using an acidic solution, and then used as catalytic particle elements. These particles are impregnated into the solid waste carrier, enriching the catalyst's catalytic performance and improving its efficiency. Under low-temperature conditions, CO in flue gas is directly used to reduce nitrogen oxides, achieving low manufacturing costs and low operating consumption. This method enables the reuse of industrial solid waste and by-products, reducing the environmental harm caused by the release of heavy metal pollutants. Compared to NH3-SCR denitrification technology, this technology eliminates the need to purchase liquid ammonia, ammonia water, or urea as reducing agents, reducing flue gas denitrification costs. It also solves problems associated with ammonia reducing agents, such as equipment corrosion, high storage and usage risks, inaccurate metering of reducing agents, and the potential formation of ammonium sulfate.

The invention discloses a boiler pickling wastewater treatment catalytic oxidation device which comprises a reactor, a reaction cavity and an upper cover, the upper cover is detachably and hermetically connected with the reaction cavity, wastewater converges and collides through an expansion section and a contraction section at a Y-shaped bifurcation to form turbulent flow, and the turbulent flow intensity is greatly improved compared with that of a traditional straight channel; meanwhile, the zigzag structure prolongs the flowing path of wastewater in the cavity, ensures that the wastewater fully reacts with the catalyst, improves the degradation efficiency of organic pollutants, continuously washes the surfaces of catalytic particles by turbulent flow, can peel off an oxidation product layer, prevents catalytic active sites from being covered, and maintains the long-term efficient activity of the catalyst; after a catalyst is added into the medicine storage space through the injection port, the sliding plate can be driven to slide by pushing the push button, so that the catalyst accurately falls into the placing groove of the reaction frame through the medicine adding groove, shutdown for uncovering is not needed, the spring reset design of the positioning piece ensures automatic and accurate reset of the sliding plate, and the sealing strip is matched with the rubber pad to realize reliable sealing after compensation.

The invention discloses a mesoporous silicate-based monatomic catalyst and a preparation method and application of porous ceramic of a derivative of the mesoporous silicate-based monatomic catalyst. According to the method disclosed by the invention, on the basis of the structural advantages of layered silicate, a high-density and uniformly dispersed monatomic active center precursor is firstly constructed on the surface of the layered silicate through a two-step strategy of anchoring and ceramization, and then the layered silicate is converted into the monolithic catalyst with a stable ceramic skeleton and a hierarchical porous structure through molding and controllable sintering. According to the method provided by the invention, an extremely strong range limiting effect is provided for metal single atoms, migration and agglomeration at high temperature and in the use process are effectively prevented, the leaching rate of cobalt is reduced, the stability of the catalyst is remarkably improved, and the service life of the catalyst is prolonged. Besides, the method can also be used for preparing catalytic particles or devices with determined macroscopic shapes and sizes, and the catalytic particles or devices can be directly put into fluidized beds, microreactors and other devices for use, so that the catalyst is stable and easy to reuse.