52results about How to "Efficient catalytic oxidation" patented technology

The invention discloses a catalyst used for oxidation of elementary substance mercury in coal-fired flue gas. The catalyst can achieve efficient catalytic oxidation of the elementary substance mercury, and the catalyst adsorbing the mercury is prone to magnetic separation from fly ash so as to achieve cyclic utilization. The catalyst is characterized in that: the catalyst is formed by loading the surface of a carrier with an active component having good oxidation performance for the elementary substance mercury; the active component is CuCl2; and the carrier relates to magnetic bead particles. The invention also discloses a preparation method of the catalyst and an activation and regeneration method after the catalyst is deactivated. The magnetic bead particles in the fly ash are adopted as the carrier, modified by loading the surface of the carrier with the active catalytic component, and subjected to mercury control, so that economic benefit is good. In particular, the modified magnetic bead particles absorbing the mercury are liable to separate from the fly ash through a magnetic separation technology, and the mercury adsorbed on the surfaces of the magnetic bead particles are controlled in a centralized manner, thus avoiding secondary pollution of the mercury. In addition, regeneration and cyclic utilization of the modified magnetic beads are achieved, and the cost of mercury control is effectively reduced.

The invention discloses a multi-metal sulfide semiconductor photocatalytic material and a preparation method thereof. The preparation method comprises the following steps: dissolving soluble metal salt and sulfourea in distilled water to obtain a reaction precursor solution; atomizing the precursor solution by using an ultrasonic atomizer to generate aerosol which is rich in tiny droplets; driving the aerosol to enter a high-temperature tube furnace, reacting under a carrier gas to generate solid powder; collecting the solid powder by using the distilled water; drying the solid powder at 75 to 85 DEG C after the solid powder is washed and centrifuged to obtain the photocatalytic material. The prepared multi-metal sulfide material has the morphology of mesoporous microspheres, and can response to visible light and show photocatalytic activity; organic matters can be decomposed under the existence of a catalyst by utilizing the visible light; energy resources are saved; the multi-metal sulfide semiconductor photocatalytic material is worth of being popularized; the preparation method has the universality in the aspect of preparing the multi-metal sulfide material; the process is simple and feasible; and therefore, the preparation method is favorable for the large-scale generation and application in industry.

The invention belongs to the technical field of sewage processing, and concretely relates to a method for preparing an active carbon fiber (ACF)-loaded Co3O4 catalysis material. The method comprises the following steps: weighing a proper amount of active carbon fiber and placing the active carbon fiber in a nitric acid solution for immersion, taking ACF out and using distilled water for washing bymultiple times to a neutral state, after drying, adding Co(NO3)2.6H2O and Na(NO3)2 in a hexyl alcohol beaker, performing magnetic stirring to uniform mixing, transferring the material to a round-bottom flask, adding pre-treated active carbon fiber in the round-bottom flask, and after immersion for 10 h, performing oil-bath backflow heating. The method is used for preparing the Co3O4 / ACF catalyst,on one hand, absorption effect of the active carbon fiber is used, dye waste water is absorbed surrounding the active carbon fiber, on the other hand, the catalyst Co3O4 is loaded on the active carbon fiber, the catalyst has low dissolution rate and high-efficiency catalytic oxidation effect, and has good degradation effect on the high-concentration difficultly-degraded dye waste water.

The invention discloses a platinum nanoparticle loaded mesoporous zirconia nanotube composite material, a preparation method and application thereof in continuous treatment of organic waste gas. The preparation method includes: utilizing hydrothermal reaction, reflux, impregnation and calcining to generate platinum nanoparticle loaded mesoporous zirconia nanotube; well mixing the nanotube with H2O, graphene and L-ascorbic acid to synthesize graphene aerogel, and performing freeze-drying, surface carboxylation and surface modifying with a MOF material to obtain the composite material. The preparation method is simple in operation, and a circle including adsorption and catalysis of the organic waste gas can be formed; adsorption of MOF can increase momentary concentration of organic waste gas around a catalyst, so that reaction rate of the organic waste gas can be increased; the composite material prepared by the method has excellent performance in treating the organic waste gas and is highly conducive to industrial application.

The invention discloses a nanometer platinum-nickel alloy and preparation and application thereof, and relates to the technical field of nanometer catalysts. Firstly, chloroplatinic acid and nickel chloride are mixed in proportion; then, PVP is added; after the pH of solution is adjusted, a reducing agent is added; and an alloy catalyst with uniform shape structure and size is obtained through strictly controlling the reaction temperature and the reaction time. The nanometer platinum-nickel alloy improves the metal activity and the electro-catalytic property through synergistic effect between metal platinum and metal nickel, reduces the use level of precious metal platinum, reduces the cost, is simple in preparation method, is mild and controllable, needs no higher temperature and harsh experiment conditions, is excellent in experiment stability, and is high in yield.

The invention relates to a preparation method of a catalytic oxidizer for meal pollutants in water. The preparation can efficiently and quickly catalyze and oxidize the metal pollutants such as arsenic, ferrum, manganese and hexavalent chromium in the water, and then is adsorbed and filtered in order to realize the purpose of removing the metal pollutants. The preparation method of the catalytic oxidizer for the metal pollutants in the water comprises the following steps: 1) powdering: powdering high-level zeolite to 200 to 325 meshes; 2) mixing: fully mixing 60 to 80% of powdered zeolite, 10 to 20% of iron oxide powder, and 10 to 20% of high-quality coal dust with 200 to 325 meshes, so as to obtain the mixed powder; 3) forming: transferring the mixed powder into a ball forming mill, spraying by 1 to 3% of modified starch solution in order to centrifugally roll the composite powder into spherical particles of 1 to 4mm; and 4) roasting: naturally drying the spherical particles of the composite powder, transferring in a kiln furnace to roast for 30 to 60 minutes at 100 to 120 DEG C, and then roasting for 120 to 150 minutes at high temperature of 600 to 700 DEG C.

The invention discloses an air purifier, and belongs to the field of purifiers. The air purifier comprises a hollow outer shell; the interior of the outer shell is provided with two separation plates in the vertical direction; the interior of the outer shell is divided into 3 chambers by the separation plates, the 3 chambers are respectively a first catalytic chamber, an absorption chamber and a second catalytic chamber, the first catalytic chamber and the second catalytic chamber are each internally filled with a catalyst, and the absorption chamber is internally filled with an absorbing liquid; two sides of the outer shell are provided with a plurality of gas inlet channels, the top end and the bottom end of the outer shell are each provided with a gas outlet channel, and the gas outlet channels communicate with the absorption chamber; an air filtration plate is arranged between one gas outlet channel and the absorption chamber, and each air filtration plate is provided with a gas entraining device. The air purifier has the characteristic of effectively removing NOx, COx and SOx in air.

The invention relates to preparation and application of a supported ruthenium catalyst with a crystal plane effect. The preparation method comprises the following steps: firstly, preparing a TiO2 carrier exposing a specific (001) crystal plane, then regulating and controlling the falling position of Ru on a TiO2 (001) crystal plane, and assembling and generating a Ru / TiO2 catalyst with a functionalized nano structure by utilizing strong interaction of Ru and the carrier. The prepared Ru / TiO2 catalyst can be applied to degradation of chlorinated aromatic hydrocarbon pollutants and has low-temperature high-efficiency catalytic oxidation reaction activity of chlorinated aromatic hydrocarbons. The catalyst prepared by the invention can realize high-efficiency catalytic degradation of the chlorinated aromatic hydrocarbons under the condition of low temperature (100-200 DEG C) by utilizing strong interaction of Ru and the TiO2 (001) crystal plane.

The invention discloses a method for utilizing mixed sludge for preparing a porous material to treat hydrogen sulfide contamination gas. The method comprises the steps of (1) uniformly mixing domestic sludge and electroplating sludge according to the mass ratio to obtain a mixed sludge particle; (2) filling the mixed sludge particle into a quartz crucible, putting the quartz crucible into a pyrolyzing furnace, and carrying out pyrolytic reaction under N2 atmosphere to obtain a pyrolyzed porous material; (3) filling the porous material into a reaction pipe, feeding hydrogen sulfide into the reaction pipe for carrying out desulfurization, enabling hydrogen sulfide to be selectively catalyzed and oxidized to elemental sulfur, and up-to-standard discharging tail gas after detection; (5) carrying out heating liquefying separation on the elemental sulfur in the reaction pipe, and recovering the elemental sulfur. According to the method, the sludge can be resourcefully utilized, the preparation method of a desulfurizing agent is reduced, the hydrogen sulfide contamination gas can be treated efficiently, the elemental sulfur can be recovered, and up-to-standard discharging is realized.

The invention belongs to the technical field of tail gas combustion catalyst, and especially relates to a liquid nitrogen washed tail gas high temperature catalytic combustion catalyst, and a preparation method and applications thereof. The liquid nitrogen washed tail gas high temperature catalytic combustion catalyst possesses a stable structure and large specific surface area; after 5h of roasting aging of the catalyst at 1000 DEG C in the air, the specific surface area is still larger than 40m<2> / g. The catalyst is capable of realizing stable high efficiency reaction of liquid nitrogen washed tail gas catalytic combustion at 800 DEG C for longer than 10000h, liquid nitrogen washed tail gas catalytic combustion efficiency is extremely high, liquid nitrogen washed tail gas CO concentration can be reduced to be lower than 50ppm, CH4 concentration can be reduced to be lower than 300ppm, H2 can be removed completely, and energy saving emission reducing effect is obvious.

The invention discloses a method of utilizing a waste and old cathode material to prepare a demercuration catalyst and an application of the demercuration catalyst. The method comprises following steps: (1) removing aluminum from a waste and old cathode material to obtain an aluminum-free cathode material; (2) subjecting the aluminum-free cathode material obtained in the step (1) to a heat treatment under the protection of inert gas to obtain a metal oxide-carbon composite catalyst; and (3) grinding the metal oxide-carbon composite catalyst obtained in the step (2), heating the composite catalyst in a reducing gas to activate the composite catalyst, and cooling the composite catalyst to obtain the demercuration catalyst. The invention also provides an application of the demercuration catalyst. A waste and old ternary cathode material is taken as the raw material to prepare the demercuration catalyst; the wastes are converted into valuable resources; the cyclic utilization of resourcesis realized; the cost of the demercuration catalyst raw materials is low, and the economic value is high. The provided demercuration catalyst has high demercuration efficiency; the catalytic oxidationefficiency can reach 90% or more, and the economic benefits can be increased prominently.

Efficient catalytic oxidation of α-isophorone to prepare oxoisophorone. The invention relates to a method for preparing oxoisophorone by catalytically oxidizing α-isophorone. The method is to use dirhodium complex Rh2(esp)2 as a catalyst under solvent-free conditions, and tert-butyl peroxidation Hydrogen aqueous solution (T‑HYDRO) is an oxidizing agent that catalyzes the oxidation of α‑isophorone.

The invention discloses a tin-nanoparticle modified oxygenated vacancy tin trioxide nanosheet composite photocatalytic material. The photocatalytic material is based on hydrothermal synthesis of the nanosheet tin trioxide, in situ reduction in a hydrogen atmosphere produces the oxygenated vacancy tin trioxide, and the metal tin modification forms a Schottky junction on its surface. The tin trioxide nanosheet has a diameter of 300-500 nanometre and a thickness of about 20 nanometre; the tin nanoparticles have a diameter of 50-200 nanometre. The photocatalytic material disclosed is combined withthe properties of the Schottky junction and the oxygenated vacancy. On the one hand, the high-quality conductivity of the metal and the metal / semiconductor Schottky junction promote the separation and transport of carriers; on the other hand, oxygen vacancies can capture photogenerated charges and broaden the photoresponse range by reducing a semiconductor band gap. The photocatalyst disclosed has high activity for oxidative degradation of organic pollutants under visible lights, the preparation method thereof is simple, the cost is low, and the industrial application has broad prospects.

The invention belongs to the technical field of sewage processing, and concretely relates to a method for preparing an active carbon fiber (ACF)-loaded Co3O4 catalysis material. The method comprises the following steps: weighing a proper amount of active carbon fiber and placing the active carbon fiber in a nitric acid solution for immersion, taking ACF out and using distilled water for washing bymultiple times to a neutral state, after drying, adding Co(NO3)2.6H2O and Na(NO3)2 in a hexyl alcohol beaker, performing magnetic stirring to uniform mixing, transferring the material to a round-bottom flask, adding pre-treated active carbon fiber in the round-bottom flask, and after immersion for 10 h, performing oil-bath backflow heating. The method is used for preparing the Co3O4 / ACF catalyst,on one hand, absorption effect of the active carbon fiber is used, dye waste water is absorbed surrounding the active carbon fiber, on the other hand, the catalyst Co3O4 is loaded on the active carbon fiber, the catalyst has low dissolution rate and high-efficiency catalytic oxidation effect, and has good degradation effect on the high-concentration difficultly-degraded dye waste water.

The invention provides an organic waste gas photo-catalytic oxidation device and belongs to the field of organic waste gas treatment equipment. The device comprises a shell and a microwave generator,wherein a gas inlet and a gas outlet are formed in the shell; the microwave generator is used for forming a microwave electromagnetic field inside the shell; catalyst net plates are arranged on both the gas inlet and the gas outlet of the shell; and an ultraviolet lamp tube and a photocatalyst plate are arranged inside the shell. With the combination of three techniques of microwaves, ultravioletlight and photocatalysts, VOC (Volatile Organic Compound) molecules can be efficiently catalyzed and oxidized, a hydroxyl photo-catalytic oxidation effect achieved after the photocatalyst is radiatedwith ultraviolet light is better than a conventional ultraviolet light photolysis effect, the VOC treatment efficiency is improved by twice or greater, and the service life is effectively prolonged by5 times.

The invention discloses a catalytic oxidation deodorization process. The process comprises the following steps: (1) mixing ozone with high pressure water by using a jet mixer, wherein the pressure ofthe high pressure water is 2.5-4kg / cm<2>; (2) treating the odor of jetted mixed liquid, obtained in the step (1), by taking hematite slag as a catalyst under the conditions that the pH value is 3-5 and the temperature is 15-25 DEG C; (3) carrying out gas-liquid separation on the odor treated in the step (2). The catalytic oxidation deodorization device comprises a high pressure injector head, an ozonator, the jet mixer, an oxidation reaction tower and a gas-liquid separator, wherein the oxidation reaction tower is internally filled with the hematite slag. According to the process and the device, the ozone is mixed with the high pressure water, so that gaseous ozone molecules and liquid water are fully mixed with each other, are activated, and collide with each other; therefore, the reaction contact area is enlarged, and deodorization is more efficient.

The invention discloses a monolithic catalyst having a macroporous cerium-manganese oxide skeleton and a preparation method thereof. According to the catalyst, a diesel engine particle catcher (DPF) with honeycomb ducts is used as a carrier, a macroporous cerium-manganese oxide skeleton layer is directly arranged on a cerium-manganese oxide nanoparticle coating on the surfaces of the honeycomb ducts, and the macroporous cerium-manganese oxide skeleton is provided with hollow holes which are communicated with one another. According to the invention, the macroporous cerium-manganese oxide skeleton layer is directly arranged on the cerium-manganese oxide nanoparticle coating, so that the macroporous cerium-manganese oxide skeleton layer can be fixed in a honeycomb duct without using an adhesive, and the temperature of catalytic oxidation of soot particles can be effectively reduced. The raw materials of the catalyst are cheap and easy to obtain, the preparation scheme is simple and easy to implement, large-scale industrial popularization is facilitated, and the catalyst has great industrial application prospects.

The invention relates to a permeable reactive barrier and a method for repairing polluted underground water by the permeable reactive barrier. The structure mainly comprises slow oxygen release layers and catalytic oxidation layers, wherein a slow oxygen release layer is laid from the bottom, then a catalytic oxidation layer is laid; the layers are similarly laid in an alternative manner until the permeable reactive wall body is higher than the top of the saturated aquifer; the main components of the slow oxygen release layer are CaO2 powder, attapulgite powder and coarse sand; and the main components of the catalytic oxidation layer are attapulgite powder and a catalytic oxidation catalyst. The permeable reactive barrier and the remediation method thereof provided by the invention have good chemical catalytic degradation performance, the in-situ remediation effect is improved, and efficient and stable remediation of polluted underground water can be realized.

The invention relates to the technical field of biosensors and especially relates to an electrode material for an ascorbic acid sensor, a biosensor, a manufacturing method and an application of the biosensor. The manufacturing method comprises the following steps: carrying out surface oxidation on foamed nickel subjected to surface deoiling treatment through a hydrothermal oxidation method; preparing and acquiring a Ni@NiO composite material; and modifying the surface of the Ni@NiO composite material of an oxidized carbon nanotube through an electronic injection method to obtain a Ni@NiO composite material / carbon nanotube, and loading ascorbic acid oxidase on the surface of the Ni@NiO composite material / carbon nanotube to prepare the electrode material for detecting an ascorbic acid. In addition, the electrode material, a reference electrode and a counter electrode form the biosensor, the ascorbic acid can be detected by adopting an electrochemical method, and the biosensor has high sensitivity and a low detection limit on ascorbic acid detection, and is short in response time and high in selectivity.

The invention discloses an air purification method. The air purification method comprises two steps of catalytic oxidation and liquid phase absorption. According to the step of catalytic oxidation, the following reaction is completed through a catalyst: 2NO+O2=2NO22CO+O2=2CO2CO+NO=CO2+1 / 2N2. The catalyst is composed of 28-36% of Al2O3, 20-28% of Fe3O4, 15-19% of CeO2, 14-16% of ZrO2 and 11-13% of Bi2O3. According to the liquid phase absorption, the following reaction is completed through an absorption liquid: 3NO2+H2O=2HNO3+NONO+NO2+H2O=2HNO2. The absorption liquid is composed of 82-92% of trihydroxymethyl aminomethane and 8-18% of hydrochloric acid. Concentration of trihydroxymethyl aminomethane is 0.1 mol / L. Concentration of hydrochloric acid is 0.1 mol / L. The air purification method has the characteristic of effectively removing NOX and COX in the air.

The invention relates to a preparation method and application of a titanium-based nano-sheet composite catalyst. The preparation method comprises the following steps: taking tetrabutyl titanate as a titanium source and regulating and controlling hydrothermal synthesis conditions to prepare a TiO2 nano-sheet carrier capable of preferentially exposing a (001) crystal surface; loading manganese and cerium metal oxide active components to prepare the titanium-based nano-sheet composite catalyst. According to the catalyst prepared by the invention, the (001) crystal surface, which is preferentiallyexposed, of a TiO2 nano-sheet, and the manganese and cerium metal oxide active components have a strong mutual effect, and efficient catalytic oxidation on chlorinated aromatic hydrocarbon can be realized.

The invention belongs to the field of organic synthesis, and in particular relates to a nitrogen-oxygen free radical-containing tertiary arylbenzene (triazine) tricarboxylic acid copper complex and its application in the preparation of menadione. The nitrogen-oxygen-containing free radical tertiary arylbenzene (triazine) tricarboxylic acid copper complex has a structural formula as shown in formula I, wherein X is C or N; R 1 for ‑H, ‑CH 3 ,-C 2 h 5 or-OCH 3 , R 1 Can be at any position on the aromatic ring; R 2 and R 3 for ‑H, ‑CH 3 or-Cl,R 2 and R 3 Can be the same or different. The compound has a novel structure and can be used as a stable and highly active heterogeneous copper catalyst to efficiently catalyze the oxidation of methylnaphthalene and the synthesis of menadione. It can avoid the use of strong oxidants such as chromic acid and hydrogen peroxide. The reaction conditions are mild and the yield is high. , can be recycled and reused, the reaction is cost-effective and has broad application prospects.

The invention discloses a method for using mixed sludge to prepare porous materials for treating hydrogen sulfide polluted gas. The steps are: (1) Mix domestic sludge and electroplating sludge evenly according to the mass ratio to obtain mixed sludge particles; ( 2) Put the mixed sludge particles into a quartz crucible and put it into the pyrolysis furnace. 2 The pyrolysis reaction is carried out in an atmosphere to obtain the pyrolyzed porous material; (3) Put the porous material into the reaction tube, pass hydrogen sulfide gas into the reaction tube to perform the desulfurization reaction, so that the hydrogen sulfide is selectively catalytically oxidized into elemental substances Sulfur, the tail gas meets the emission standards after being tested; (5) The elemental sulfur in the reaction tube is heated, liquefied and separated to recover elemental sulfur. This method can not only recycle sludge and reduce the cost of desulfurization agent preparation, but also efficiently process hydrogen sulfide polluting gas, recover sulfur elements, and achieve emission standards.

The invention relates to a sulfur-containing organic waste gas catalytic oxidation catalyst and a preparation method thereof. The surface of a honeycomb carrier is coated with an aluminum oxide-titanium oxide composite coating, then the honeycomb carrier is soaked in composite slurry, and the composite slurry is prepared after an SSZ-13 molecular sieve loads an active component. According to the catalyst, sulfur-containing organic matters in waste gas can be efficiently converted into sulfur dioxide, the SO2 selectivity is high, and the adverse effect of organic sulfides on the subsequent technological process is avoided.

The invention belongs to the field of organic synthesis, and particularly relates to a mesitylene biaryl (triazine) tricarboxylic acid copper complex containing nitrogen oxygen radicals, and application thereof in preparing menadione. The mesitylene biaryl (triazine) tricarboxylic acid copper complex containing the nitrogen oxygen radicals has the structural formula as shown in the formula I, wherein X is C or N; R1 is -H, -CH3, -C2H5 or -OCH3 and can be at any position on an aromatic ring; R2 and R3 are -H, -CH3 or Cl, and can be the same or different. The complex is novel in structure, can be used as a stable heterogeneous copper catalyst with high activity, is capable of high-efficiently catalyzing and oxidizing methylnaphthalene so as to synthesize the menadione, can be free of using chromic acid, hydrogen peroxide and other strong oxidants, and is mild in reaction conditions, high in yield, recyclable, economic and high-efficiency in reaction, and broad in application prospect.

The invention discloses a heat recycling system and method for VOCs. The system comprises a microwave catalytic combustion device, one end of an air inlet channel is connected with a VOCs air source, the other end is connected with a shell side inlet of a first heat exchanger, a shell side outlet is connected with an air inlet of the microwave catalytic combustion device, an air outlet is connected with a pipe side inlet of the first heat exchanger, a pipe side outlet of the first heat exchanger is connected with a pipe side inlet of a second heat exchanger, a pipe side outlet of the second heat exchanger is connected with a tail gas absorption device, a fresh air device is connected with a shell side inlet of the second heat exchanger, and a shell side outlet is connected with a heat supply pipe network. By means of the microwave catalytic combustion device, VOCs waste gas can be subjected to efficient catalytic oxidation and mineralization, and the degradation and mineralization rate of the VOCs is effectively increased; the first heat exchanger is arranged, preheating of inlet air of the microwave catalytic combustion device is achieved, the temperature rising speed of a catalyst bed layer is increased, the temperature rising time of the catalyst bed layer is shortened, the VOCs waste gas degradation effect is improved, and heat recovery of the VOCs subjected to catalytic oxidation is achieved.

The invention discloses a composite photocatalytic material of tin nanoparticle-modified tritin tetraoxide nanosheets with oxygen vacancies. The in-situ reduction under the atmosphere obtains tritin tetroxide with oxygen vacancies, and the metal tin is modified to form a Schottky junction on its surface. The diameter of the tin trioxide nanosheets is 300-500nm and the thickness is about 20nm; the diameter of the tin nanoparticles is 50-200nm. The photocatalytic material disclosed in the present invention combines the properties of Schottky junction and oxygen vacancies. On the one hand, the high-quality electrical conductivity of metals and metal / semiconductor Schottky junctions promote the separation and transport of carriers; on the other hand, oxygen vacancies can capture Photogenerated charges and widened the photoresponse range by lowering the semiconductor bandgap. The photocatalyst disclosed by the invention has high activity for oxidative degradation of organic pollutants under visible light, and the preparation method is simple, the cost is low, and the industrial application prospect is broad.

The invention relates to a method for preparing a VOCs catalyst by using iron-containing solid waste and catalytic oxidation of volatile organic compounds by using the catalyst. The novel catalyst forthe efficient catalytic oxidation of VOCs is prepared by using mixed powder of the iron-containing solid waste and organic matter as a carrier material of the catalyst, loading metal (one of Mn, Fe,Ni, Ce and V) oxide active components and doping an auxiliary agent (one of nitrates of Fe, Co and Ce and CaCO3). The catalyst simultaneously loaded with manganese and doped with cerium has the best catalytic activity.