227 results about "Efficient catalyst" patented technology

The invention relates to an electrode and a membrane electrode assembly for a zero-gap electrolyzer, a zero-gap electrolyzer, the use of a metal phthalocyanine, and a method for producing an electrode. An electrode (1, 1a, 1b) for a zero-gap electrolyzer (11) comprises a metal phthalocyanine (4). In this way, a particularly effective and cost-efficient catalyst can be provided.

The invention discloses a cobalt-copper bimetallic nitrogen-doped carbon catalyst, which is characterized in that CoCu-coated LNC, Co and Cu nanoparticles are anchored on a nitrogen-doped carbon carrier derived from lignin. Accordingly, the inventor also establishes a corresponding preparation method, and the catalyst is prepared by taking lignin as a carrier, cobalt-copper bimetal as an active component and dicyandiamide as a nitrogen source through one-pot pyrolysis. The method has the characteristics of simple and efficient process, high catalyst stability and activity, economy, high efficiency, environmental friendliness and the like. The method is used for preparing 2, 5-furandicarboxylic acid through thermal catalytic oxidation of 5-hydroxymethylfurfural, the yield of the target product FDCA almost reaches 100%, and the application prospect is wide.

The present invention discloses a class of nitrogen heterocycle-substituted hexa-dentate aminophenoxy rare earth complexes (I), a preparation method thereof, and an application thereof in the highly active catalytic ring-opening polymerization of lactones. The preparation method comprises the following steps: reacting a neutral ligand with a metal raw material compound in an organic medium, then adding an alcohol for reaction, and obtaining the target compound through filtration, concentration, and recrystallization. The nitrogen heterocycle-substituted hexa-dentate aminophenoxy rare earth complex of the present invention is a highly efficient catalyst for the ring-opening polymerization of lactones, and can be used for catalyzing the polymerization reaction of lactones such as lactide, and catalyzing the one-pot copolymerization of lactide and ε-caprolactone to obtain a multi-block copolymer. The nitrogen heterocycle-substituted hexa-dentate aminophenoxy rare earth complex of the present invention has good tolerance to impurities, has very high catalytic activity, and can obtain high molecular weight polyester materials. A has a structure shown in formula (II), (III), (IV) or (V); B has a structure shown in formula (VI) or (VII).

The invention discloses a hydrofining method for optimizing the chromatic value of a bio-based terephthalic acid product, and belongs to the technical field of terephthalic acid hydrofining. The special refining process suitable for the bio-based CTA is formed by optimizing the whole process of pretreatment, hydrogenation reaction and post-treatment. The process not only solves the problem that the bio-based raw material has many impurities, but also realizes the balance of environmental protection and economy through the green solvent (water), the efficient catalyst (Pd / C) and controllable parameter design, provides a feasible path for the industrial production of bio-based PTA, and promotes the transformation of the polyester industry to sustainable development. The method provided by the invention is high in impurity removal rate, can efficiently purify the bio-based CTA to obtain a product meeting the PTA standard, is mild in reaction condition, realizes low-energy-consumption and high-stability operation under efficient catalysis, is small in process pollution, and reduces the environmental load.

The invention discloses a low-pressure portable efficient hydrogen production device based on ammonia borane, which comprises a pressure-resistant and high-temperature-resistant cylindrical shell, an annular porous skeleton in which an efficient catalyst is embedded, a pluggable stirring module, a heating assembly, a gas exporting and purifying module, a safety monitoring assembly and the like, and relates to the technical field of hydrogen production equipment. According to the low-pressure portable efficient hydrogen production device based on ammonia borane, the shell has pressure-resistant and high-temperature-resistant performance, by adopting a special efficient catalyst, the pyrolysis reaction temperature of ammonia borane is reduced, the generation rate and yield of hydrogen are increased, efficient hydrogen production is achieved, the device is provided with a temperature sensor and a pressure safety valve, safety is guaranteed, and the device is suitable for popularization and application. The reaction product nitrogen boride can be utilized, key materials can be recycled and replaced regularly, the device is suitable for a robot with a body, a robot dog, an unmanned aerial vehicle, an emergency power supply and the like, hydrogen can be supplied integrally or in a distributed mode, and the problems that an existing hydrogen production device is low in efficiency, poor in portability, insufficient in safety and the like are effectively solved.

The invention relates to a design method of a stainless steel-based natural seawater electrolysis high-efficiency catalyst, a catalyst and application thereof, and the design method comprises the following steps: taking a stainless steel mesh as a carrier, and placing the carrier in a high-concentration alkaline solution; the stainless steel surface is subjected to oxidation treatment by applying long-time oxidation voltage to form an amorphous nickel-iron mixed oxide layer, the stainless steel with the oxidation layer formed on the surface is further soaked in a solution containing metal M salt, and nanoclusters loaded with the M salt of the stainless steel oxidation layer are formed through pulse electrodeposition; and the loading capacity and the cluster size of the nanocluster are regulated and controlled by changing the deposition current and the pulse frequency of pulse electrodeposition. Compared with the prior art, excellent seawater electrolysis anode catalysis corrosion resistance is achieved through commercial stainless steel surface modification treatment and precious metal nanocluster loading, and the stainless steel material subjected to modification treatment achieves long-term stable operation under the real seawater electrolysis industrial current density working condition.

The invention provides iron-manganese composite oxide modified biochar (FM-SBC) as well as a preparation method and application thereof, and relates to the technical field of modified biochar. The method comprises the following steps: drying, grinding, modifying, drying and pyrolyzing excess sludge of a secondary sedimentation tank of an urban sewage treatment plant, and modifying the excess sludge by using an iron-manganese composite oxide to obtain the iron-manganese composite oxide modified biochar. The iron-manganese composite oxide modified biochar can be used as an efficient catalyst of persulfate (PS), provides technical support for treatment of refractory organic wastewater by enhancing the catalytic effect and enhancing efficient degradation of refractory organic pollutants such as azo dyes, and is of great significance to sustainable development of the environment.

The invention discloses a Fe-N-C catalyst and application thereof in degradation of perfluorinated and polyfluoroalkyl substances, and belongs to the technical field of water treatment. The preparation method comprises the following steps: taking nitrogen-doped carbon derived from pine cones as a substrate, dissolving aminated pine cones, FeCl36H2O, sodium acetate and polyethylene glycol in ethylene glycol, reacting at 200 DEG C for 10 hours, putting in an inert gas atmosphere, and calcining at 900 DEG C for 2 hours; the Fe-N-C catalyst which simultaneously contains Fe nano particles (Fe NPs) and Fe-N single atoms (Fe SAs) and has different sizes and double sites is prepared. The catalyst and PMS are mixed and then added into water, and perfluoro and polyfluoroalkyl substances in the water can be degraded; the catalyst can activate PMS to promote formation of a non-free radical pathway, depends on a degradation mechanism of Fe (IV) = O and singlet oxygen (O), the degradation rate of PFOA within 2 hours reaches 90.5%, and the catalyst also shows relatively strong tolerance in different natural water bodies; a key thought is provided for designing the efficient catalyst, and a new technical direction is expected to be provided for environmental treatment of persistent organic pollutants such as PFOA.

The invention discloses an optimization method for preparing BTX through biomass catalytic pyrolysis based on automatic machine learning. The optimization method comprises the steps of data set construction, exploratory data analysis and feature engineering, automatic machine learning modeling and evaluation and interpretability analysis and application. According to the method, based on known biomass raw material characteristic parameters, catalyst characteristic parameters, pyrolysis parameters and product selectivity information in literatures, the selectivity of BTX preparation through biomass catalytic pyrolysis is predicted by utilizing an automatic machine learning technology, and a heuristic algorithm is coupled to realize catalyst screening; the problem that a traditional biomass catalytic pyrolysis experiment needs to adopt a trial-and-error method to carry out mass optimization and catalyst screening can be solved, and the method has the characteristics and advantages of reducing experiment cost, automatically screening an optimal model, reversely guiding process optimization, automatically screening a high-efficiency catalyst and the like, so that biomass directional pyrolysis can be efficiently assisted to prepare high-value chemicals.

The invention discloses a high-efficiency catalyst and a preparation and application method thereof, and relates to the technical field of nano carbon material preparation, the high-efficiency catalyst comprises the following components: an organic metal compound containing iron, cobalt and nickel, a refractory metal organic compound, a cocatalyst and a functional auxiliary agent, the catalyst is used for preparing the carbon nanotube by a floating chemical vapor deposition method, a high-temperature plasma CVD method or a plasma arc method, all components of the catalyst are uniformly mixed through melting granulation, the defect that the proportion is difficult to accurately control due to independent feeding is avoided, meanwhile, powder feeding can be cracked and evaporated in the subsequent carbon nanotube preparation process, and the carbon nanotube preparation efficiency is improved. The catalyst with higher concentration is obtained, and the preparation efficiency of the single-walled carbon nanotube is remarkably improved.

The invention discloses tetragonal system germanium dioxide and a hydrothermal synthesis method thereof. According to the method, hexagonal crystal system germanium dioxide is taken as a raw material, a hydrothermal reaction is carried out in an acidic aqueous solution, and efficient conversion from a hexagonal crystal system to a tetragonal crystal system is realized by controlling the reaction temperature to be 120-240 DEG C, the reaction time to be 24-48 hours and the pH value to be 1-3. According to the preferable scheme, the raw materials are subjected to calcination pretreatment at the temperature of 500-600 DEG C, the yield of the tetragonal crystal phase can be remarkably increased, and the synthesis temperature can be reduced to 120 DEG C. According to the invention, stable synthesis of tetragonal system germanium dioxide is realized for the first time under the mild condition of 240 DEG C and below, and the technical problem that high-temperature transformation at 1000 DEG C or above is needed in the traditional method is solved. The tetragonal crystal system germanium dioxide prepared by the method is of a regular polyhedral structure, has the particle size of 400-500nm, and can be used as a high-efficiency catalyst for polyester synthesis. The process is energy-saving and environment-friendly, the total utilization rate of the raw materials is increased by recycling the waste liquid, and the process has remarkable industrial application value.

The invention discloses a Pt-based molecular sieve dehydrogenation catalyst as well as a preparation method and application thereof. According to the catalyst, a molecular sieve is used as a carrier, Pt is used as an active component, one of Fe, Co, Ni, Cu, Zn and the like is used as an auxiliary component, and one of Na, Mg, K, Ca and Cs is used as an alkali metal component. The preparation method comprises the following steps: firstly, carrying out thermal activation treatment on a carrier, then carrying out secondary ball milling treatment to improve the accessibility of metal particles and carrier defect sites, and further chemically inducing the carrier defect sites and the metal particles to form stable chemical bonds through high-energy mechanical force, so as to enhance the metal-carrier interaction. And stabilizing active metal sites through high-temperature oxidation and reduction treatment, thereby obtaining the dehydrogenation catalyst with high activity and high stability. According to the method, the use of a solvent is avoided, the synthesis steps are simplified, and the method is an environment-friendly, simple, economical and efficient catalyst synthesis method.

The invention relates to the technical field of high-valued utilization of solid wastes, and discloses a transition metal doped iron-containing solid waste catalytic material, a preparation method thereof and an application of the transition metal doped iron-containing solid waste catalytic material in degradation of PET (Polyethylene Terephthalate). The method comprises the following steps: carrying out physical screening or disc (ball) milling treatment on the iron-containing solid waste, then dissolving the iron-containing solid waste in organic acid, and heating and stirring to obtain turbid liquid; carrying out solid-liquid separation on the turbid liquid to obtain a solid; dissolving transition metal salt in water, adding the transition metal salt and the solid into a reaction container, adding oxalic acid, adjusting the pH value, and uniformly stirring and mixing; carrying out heating reaction on the mixed solution, and drying an obtained reaction product to obtain a precursor; and roasting the precursor to obtain the transition metal doped ferrite catalyst. The method for preparing the PET alcoholysis efficient catalyst from the iron-containing solid waste has the advantages of being low in raw material cost, high in catalytic efficiency, low in equipment requirement, easy to separate and recycle and the like, a brand new thought is provided for PET alcoholysis, the method has a large application prospect, and the catalytic material is suitable for industrialization.

The invention relates to the technical field of high polymer material recovery, in particular to a composite catalyst for preparing DMT through PET alcoholysis and a preparation method and application of the composite catalyst. The composite catalyst comprises a solid acid material which is obtained by carrying out proton transfer reaction on silica gel of which the surface is grafted with aluminum alkyl and perfluoroalkyl sulfonic acid of which the general formula is Rf-SO3H, wherein Rf is a perfluoroalkyl group with the carbon atom number of 1-10. Through the synergistic effect of the components, the composite catalyst shows excellent performance in the process of degrading PET (Polyethylene Terephthalate) by monohydric alcohol. When methanol is used as an alcoholysis agent, the yield of the main product dimethyl terephthalate (DMT) can reach 95% or above, the catalytic efficiency is high, the stability is good, an efficient catalyst is provided for industrialization of chemical recovery of PET, and the method has important economic and environmental values.

The invention discloses a preparation process of multi-metal doped phosphorus selenide. The preparation process comprises the following steps: step 1, preparing and mixing raw materials; 2, quartz tube pretreatment and raw material packaging; step 3, gradient calcination; the preparation method has the advantages that the composite metal phosphorus selenide (Fex (CoNiCuZn) 1-xPSe3) with gradient component distribution is prepared by regulating and controlling the molar ratio of Fe to Co, Ni to Cu to Zn (Fe: (Co + Ni + Cu + Zn) = 9: 1, 8: 2 and 7: 3) and combining a vacuum tube sealing high-temperature calcination process, the oxygen evolution reaction (OER) activity of the material is remarkably improved through the multi-metal synergistic effect and controllable lattice distortion optimization, and the composite metal phosphorus selenide can be used for preparing the composite metal phosphorus selenide (Fex (CoNiCuZn) 1-xPSe3) with gradient component distribution. The overpotential of the obtained catalyst under the current density of 10 mAcm <-2 > is as low as 322 mV and is close to commercial IrO2 (306 mV), the performance is excellent under the high current density of 100 mAcm <-2 >, the process is simple, the cost is low, the raw material cost is reduced by 90% or above compared with that of a noble metal catalyst, and a new strategy is provided for industrial application of the efficient OER catalyst.

The invention belongs to the field of catalytic materials, and particularly discloses a double noble metal supported molecular sieve catalyst for catalyzing oxygen to oxidize methane to prepare acetic acid. The preparation method comprises the following steps: mixing a chloroauric acid solution and another noble metal chloride solution as precursors with a molecular sieve, adjusting a certain pH value, stirring and aging at a proper water bath temperature for a certain time, and then filtering, drying and calcining to obtain the catalyst. According to the catalyst, a molecular sieve is used as a carrier, gold is used as an oxidation active center, carbon-carbon coupling is achieved with another precious metal, high-selectivity acetic acid preparation through methane pure oxygen direct oxidation can be achieved under the mild condition of 120-240 DEG C, and the selectivity reaches up to 97.2%. The catalyst preparation method adopted by the invention is simple in process, green and pollution-free, high in noble metal loading efficiency, low in price and easy for expanded production, and provides a thought for developing and preparing a high-efficiency catalyst for direct selective oxidation of methane under mild conditions.

This invention discloses a method for preparing bio-based polycarbonate, belonging to the field of polymer materials technology. This method introduces a highly efficient catalyst (nano-cerium oxide) into the polyisosorbate preparation system through specific steps, precise control of reactant ratios, pre-activation treatment, and the use of antioxidants, achieving the preparation of high-bio-based, high-hardness, and high-performance polyisosorbate. This method not only simplifies the traditional polycarbonate material preparation process and reduces production costs, but also improves the environmental friendliness and sustainability of the product, solving many problems faced by traditional polycarbonate materials in the current market.

The application provides a high-efficiency catalyst for cyclic carbonates, a preparation method and application thereof, and compared with the prior art, the catalyst is prepared from a monoamine-based polyether, a polyamine, a phenolic monomer and formaldehyde, an aminated intermediate is synthesized through a chemical grafting reaction, and then is reacted with an epoxy group quaternary ammonium salt to obtain a supported quaternary ammonium salt catalyst. The catalyst molecular structure comprises a quaternary ammonium salt group, a tertiary amine group, a hydroxyl group and an ether bond structure, can not only play a catalytic effect of the quaternary ammonium salt, but also has a certain complexing effect of oxygen atoms in the tertiary amine group, the hydroxyl group and the ether bond structure, can stabilize the ion pair of the quaternary ammonium salt catalyst, and ensure the catalytic effect of the catalyst. Moreover, the catalyst prepared in the application can be independently used for catalyzing preparation of cyclic carbonates, does not need a cocatalyst, and has high catalytic efficiency and good stability.

The application discloses preparation and application of a spatially separated BiVO4 material. The BiVO4 material is rapidly and accurately synthesized through a microwave hydrothermal method, and the synthesized BiVO4 material is used as a base material BiVO4. Light makes the base material BiVO4 generate photoelectrons and photoholes. Due to the crystal face effect of the base material BiVO4, the photoelectrons and photoholes are directionally transferred to the (0 1 0) reduction crystal face and the (1 1 0) oxidation crystal face of the base material BiVO4. Then, the spatially separated Pt and FeCoO x bipartite cocatalyst, and finally a composite Pt / BiVO4 / FeCoO x material with spatial separation is realized. x The composite Pt / BiVO4 / FeCoO x material can effectively mineralize diclofenac sodium to CO2, and then reduce the CO2 to methanol and ethanol to realize resource recycling. The application realizes selective loading of a bipartite cocatalyst and high-selectivity one-pot conversion of pollutants into recyclable resources, and provides a new idea for design and application of an efficient catalyst.

The application discloses a method for producing formaldehyde at low temperature, and belongs to the technical field of formaldehyde production. The method comprises the following steps: preparing a high-efficiency catalyst by taking iron nitrate nonahydrate, ammonium molybdate tetrahydrate and lithium hydride as raw materials; feeding mixed gas of methanol and air into a reactor filled with the high-efficiency catalyst under the condition that the temperature is 250-280 DEG C; and collecting gas at the outlet of the reactor to complete the method for producing formaldehyde at low temperature. The embedding of lithium can expand the crystal lattices of the catalytic products, thereby generating a large number of oxygen vacancies, enhancing the electron-donating capacity, and enabling the adsorption of p-formaldehyde to be quickly dissociated and the active sites to be quickly reduced at a relatively low temperature, so that the activity of subsequent catalysis is ensured. The plasma treatment can increase the surface area and the number of active sites of the high-efficiency catalyst, and further improve the catalytic activity. The method for producing formaldehyde at low temperature can improve the conversion rate of methanol and the yield of formaldehyde at a relatively low temperature, and is helpful to reduce energy consumption and reduce the volatilization of Mo.

The application belongs to the technical field of composite materials, and relates to a preparation method of a kind of red mud reinforced anaerobic digestion biogas residue biochar loaded coating reduced graphene oxide layer carbon nitride (CN@rGO / RCH) high-efficiency catalyst, which comprises: CN and GO are fully stirred and ultrasonically dispersed in deionized water, and the solid-liquid mixture is hydrothermally reacted at 160-200 DEG C for 12-24 hours to obtain CN@GO; CN@GO and RCH are fully mixed and dispersed in deionized water, and are placed in a gas bath constant-temperature oscillation box for ultrasonic oscillation; after centrifugal drying, pyrolysis is carried out at 700-900 DEG C in an inert gas for 2-4 hours, and after cooling to room temperature, the catalyst is obtained. The prepared catalyst is applied to activate persulfate to degrade tetracycline in water. The preparation process is simple, controllable and environmentally friendly, and by loading and coating carbon nitride with reduced graphene oxide layer after anaerobic high-temperature pyrolysis and hydrochloric acid modification of red mud reinforced anaerobic digestion biogas residue, the environmental hazard solid waste produced by anaerobic digestion is recycled and reused, and the purpose of rapidly degrading tetracycline in water is achieved.

The invention discloses a preparation method and application of a Beta molecular sieve catalyst rich in outer surface B acid, and solves the technical problem that the existing efficient catalyst is unstable in structure. The preparation method comprises the following steps: synthesizing the H-Beta carrier rich in the outer surface B acid: drying Beta zeolite raw powder without removing a template agent, then carrying out ion exchange for 2 hours by using an NH4Cl aqueous solution, washing a solid with water, drying, repeating the ion exchange process, and roasting the obtained ion exchange solid at 550 DEG C for 4 hours to obtain the H-Beta carrier rich in the outer surface B acid; and preparing the supported bifunctional catalyst: loading the metal Ir onto the H-Beta carrier rich in the B acid on the outer surface by an equivalent impregnation method. The Beta molecular sieve disclosed by the invention is rich in outer surface B acid, is used for a catalytic reaction for synthesizing high-density endothermic aviation fuel by converting polycycloalkane, provides higher reaction active site density and promotes diffusion of macromolecular cycloalkane.

This application relates to the field of hydrosilylation, and in particular to a highly efficient catalyst for hydrosilylation reactions and its preparation method. This application provides a method for preparing a microcapsule-form catalyst, which first modifies methyl-terminated hydroxyl silicone oil with silazane, and then forms a microcapsule coating system with paraffin, thereby improving the release performance of the microcapsule coating system, so that the catalyst has low reactivity in the early stage of release, thereby improving the uniformity of the reaction process inside the silicone rubber, and thus improving the transparency and overall strength of the silicone rubber.

The invention discloses efficient antibacterial nano magnesium oxide and a preparation method thereof, and relates to the technical field of inorganic nano powder synthesizing.The method comprises the steps that industrial magnesium sulfate heptahydrate, urea and a surfactant are mixed, a magnesium carbonate intermediate is synthesized through a hydrothermal precipitation reaction, and then nano magnesium oxide powder is prepared through high-temperature calcination of a muffle furnace. The antibacterial rate of the nano magnesium oxide prepared by controlling the morphology to staphylococcus aureus reaches up to 99.11%, and the nano magnesium oxide has great potential in the field of antibacterial materials. Meanwhile, the nano magnesium oxide with high specific surface area is also widely applied to the fields of inorganic flame retardants, heavy metal adsorption materials, high-efficiency catalysts and the like. The process is based on low-cost bulk raw materials, has the advantages of being simple in process, green and environment-friendly (production waste liquid is converted into agricultural ammonium sulfate), controllable in morphology and the like, and provides a breakthrough technical scheme for large-scale industrial production of nano magnesium oxide.

The invention discloses a high-efficiency catalyst for producing PET (polyethylene terephthalate) as well as a preparation method and application of the high-efficiency catalyst, and belongs to the technical field of catalysts. The preparation method comprises the following steps: S1, in an inert atmosphere, mixing tetrabutyl titanate and tetraethyl silicate, and carrying out a heating reaction I to form a titanium-silicon composite intermediate; s2, phenyl phosphonic acid and polyphosphonic acid ligands are added into the titanium-silicon composite intermediate obtained in the step S1, the pH is adjusted to 4.0-5.0, a heating reaction II is conducted, and a ligand modified titanium-silicon compound is obtained; s3, ethylene glycol is added into the ligand modified titanium-silicon compound obtained in the step S2, reflux is conducted for 3-5 hours at the temperature of 125-140 DEG C, filtering and drying are conducted after cooling is conducted to the normal temperature, and the efficient catalyst for producing PET is obtained. By constructing a system of the titanium-silicon composite carrier and the phosphonic acid ligand, efficient and stable catalysis of the titanium catalyst in a regenerated material system is achieved, and high polymerization activity can still be kept under low-purity rBHET.

The invention provides a high-valued utilization method and device for residual liquid in a rectifying tower in the production process of 1, 4-cyclohexanedimethanol, and relates to the technical field of by-product purification, and the method comprises the following steps: adding residual liquid in a CHDM rectifying tower, a catalyst and methanol into a methanol alcoholysis tank for alcoholysis reaction; introducing the alcoholysis solution into a scraper evaporator for distillation separation, and conveying a product into a gas-liquid separation tank to obtain an alcoholysis concentrated solution; and introducing the alcoholysis concentrated solution into an alcoholysis solution recovery tower for vacuum rectification, and condensing to obtain a crude product CHDM. According to the method, a methanol alcoholysis process is innovatively adopted, the CHDM rectifying tower kettle residual liquid is efficiently converted into high-value products such as CHDM, MHMCC and DMCD, and the products can be directly recycled to an existing CHDM rectifying system; through a designed methanol and tower kettle residual liquid recycling system, efficient utilization of raw materials and emission reduction of wastes are realized; a high-efficiency catalyst is adopted, so that conversion can be realized under mild conditions; and the catalyst can be used together with a device, and can be directly connected to the existing CHDM rectification device without modifying the original device.

The application discloses a method for preparing an ozone catalyst by using iron oxide scale waste residues as raw materials and application thereof. By using the iron oxide scale waste residues as the ozone catalyst, various organic pollutants in water can be efficiently degraded, and the method has good industrial application value. It is found through experiments that the IOS waste residues without any treatment can be directly used as the ozone catalyst, or the IOS waste residues can be treated by means of bagging, ball milling and briquetting, urea doping and the like, and high-efficiency O3 catalysts can be obtained, the catalysts can efficiently catalyze low-concentration O3, and the effective degradation of high-concentration tetracycline in water can be realized within 12 min, and the degradation rate is 90%. The iron oxide scale block and the IOS waste residues doped with urea have the best activity, good stability and easy recycling. The above results show that the solid waste, the iron oxide scale, which is inevitably produced in the steel production process, is used as the high-efficiency catalyst of O3, the problem of resource utilization of the iron oxide scale waste residues is properly solved, and a kind of ozone water treatment technology with good industrial application prospect is developed.

The invention relates to the technical field of brine sewage treatment, and discloses an inferior brine refining preparation method based on oxidation-adsorption coupling, which comprises the following steps: adding an efficient CuO / Al2O3 catalyst according to 0.5-1.5% of the volume of brine under the accurate control of the pH value of 2.5-3.0, and adding sodium chlorite according to the molar ratio of 3: 1-5: 1 to realize the specific deep oxidation of I <->; and carrying out targeted enrichment on the generated I2 by using a high-capacity adsorbent. According to the combined process, the iodine concentration of effluent is stably lower than 0.1 mg / L, and the catalyst can be recycled for more than or equal to 50 times. Comparison data proves that the iodine residue is up to 0.85 mg / L when no catalyst exists, and iodine removal is not thorough due to the fact that the oxidizing agent is insufficient. According to the efficient iodine removal method, the deposition of iodine in the ionic membrane electrolytic bath is fundamentally avoided, the expensive ionic membrane is effectively protected, the service life of the ionic membrane is prolonged by more than 30%, the energy consumption of the system is reduced by about 15%, and the brine recycling efficiency and the economic benefit are remarkably improved.

The invention discloses a catalyst combination method for simultaneously removing CO and NOx in flue gas, which is characterized in that two reaction systems are arranged in a flue gas purification device, the flue gas enters the flue gas purification device, ammonia spraying operation is carried out, oxidation reaction is carried out on the upper layer of the flue gas purification device, and CO in the flue gas is oxidized into CO2 and part of NO is oxidized into NO2 under the catalytic action of an oxidation catalyst Co1-xNix / Al2O3; according to the method, CO and NOx in the flue gas are removed at the same time, NH3-SCR reaction is carried out on the lower layer of the flue gas purification device, and under the catalytic action of a NOx selective reduction catalyst, blown ammonia gas and NOx in the flue gas are converted into N2 and H2O, so that CO and NOx in the flue gas are removed at the same time. The flue gas purification device is utilized to realize efficient and synergistic removal of CO and NOx, and has the characteristics of high efficiency, simple catalyst preparation, convenience in engineering application and the like.

The invention belongs to the field of environmental functional materials, particularly relates to an efficient catalyst based on industrial solid waste recycling, and provides an iron-nitrogen co-doped biochar catalyst based on papermaking sludge recycling and a preparation method thereof.The preparation method comprises the two steps that 1, after blended sludge and composite ferric salt ML are subjected to ultrasonic blending in water, a hydrothermal reaction is completed, and an iron-nitrogen co-doped biochar catalyst is obtained; carrying out post-treatment to construct a carbonaceous precursor; and (2) calcining and pyrolyzing the carbonaceous precursor and a nitrogen source in an inert atmosphere to obtain the iron-nitrogen co-doped sludge-based biochar catalyst. According to the method disclosed by the invention, the dual goal of treating pollution by waste is achieved, and experimental results show that the prepared biochar has a high specific surface area and a rich pore structure, and can be used for quickly and efficiently activating PMS, generating persistent free radicals and quickly degrading residual pollutant trichlorophenol (TCP) in a water body.