79results about How to "Large saturated adsorption capacity" patented technology

The invention provides a high-property absorption and wave absorption type catalyst for VOCs (Volatile Organic Chemicals) catalytic oxidation. The high-property absorption and wave absorption type catalyst has a structural formula: a Cu-Mn-Ce / TiO2-molecular sieve or a CNDs-Cu-Mn-Ce / TiO2-molecular sieve, wherein CNDs serve as a modifier; Cu and Mn serve as catalytic activity components; Ce serves as a promoted catalytic metal; a TiO2-molecular sieve serves as a carrier. The invention further provides a preparation method of the catalyst. According to the catalyst and the preparation method of the catalyst provided by the invention, the treatment cost is greatly reduced and energy is utilized at maximum through the advantages of the combination of a plurality of materials, so that the relatively good VOCs catalytic oxidation effect can be realized under the microwave irradiation.

The invention discloses a simultaneous desulfation, denitration and mercury removal device, relating to mercury removal devices for flue gases of coal-fired power plants. The device is provided with a simulated flue gas generating unit, a plasma oxidation unit, an activated carbon adsorption unit and a flue gas ingredient detection unit, wherein pipes of the simulated flue gas generating unit, the plasma oxidation unit, the activated carbon adsorption unit and the flue gas ingredient detection unit are connected through rotary valves and Y-shaped three-way joints; the simulated flue gas generating unit is provided with a N2 cylinder, a CO2 cylinder, a SO2 cylinder, an O2 cylinder, a NO2 cylinder, a HCl cylinder, a NO cylinder, a mass flow controller, a Hg0 permeation tube and a thermostatic water bath; a gas washing bottle is arranged in the thermostatic water bath; the plasma oxidation unit is provided with a high-voltage power supply and a plasma reactor; the plasma reactor is provided with a quartz dual-dielectric layer; the activated carbon adsorption unit is provided with a thermostatic baking box and an adsorption reactor; and the detection unit is provided with a flue gas analysis unit and a Hg0 analysis unit.

The invention relates to preparation and application of a lignin or an aminolignin-modified magnetic nano-adsorbent. The magnetic nano-adsorbent is obtained by a one-step conversion of lignin and a raw material iron salt by a modified chemical coprecipitation method. The main method is to prepare surface-modified magnetic nanoparticles by dissolving lignin or amino-modified lignin in an alkaline precipitant and using the alkaline precipitant for coprecipitation. The synthesized magnetic nano-adsorbent has adsorption capacity for both anionic dyes and cationic dyes. Compared with other lignin-based adsorbents, the adsorption capacity is increased by about 2 to 5 times. At the same time, desorption can be achieved by adjusting of the pH, so that the adsorbent is recycled, and the dyes can berecovered. Lignin raw materials used in the adsorbent are industrial and agricultural waste materials, the materials are rich and low in price, the synthesis method is simple and efficient, and the adsorbent is economical and environmentally friendly, and has good application prospects.

The invention discloses a method for recovering rhenium from molybdenum smelting waste acid and belongs to the technical field of metal rhenium recovery and recycle. The method comprises 1, filtering molybdenum smelting waste acid, and treating the filtrate by a composite aminoethylene weak basic anion exchange resin column for adsorption until adsorption is saturated, and 2, carrying out desorption on the saturated anion exchange resin column, collecting the desorption liquid and carrying out evaporation crystallization to obtain ammonium perrhenate. The composite aminoethylene weak basic anion exchange resin has large saturation adsorption quantity. The desorption liquid has rhenium content 100 times or more that of waste acid. Compared with the existing extraction method and ion exchange method, the method provided by the invention has a high rhenium recovery rate of 98% or more. Through use of solubility difference of ammonium perrhenate, ammonium molybdate and ammonium sulfate, ammonium perrhenate is purified by evaporation crystallization and ammonium perrhenate purity is 99.9% or more. The method has a simple rhenium recovery process, is environmentally friendly, is convenient for operation and is suitable for large scale production.

The invention relates to a method for repairing heavy metal polluted soil based on a permeation absorption wall. The method specifically comprises the steps of: construction of the permeation absorption wall, soil leaching, heavy metal enrichment, regeneration of the permeation absorption wall, and heavy metal recovery. Compared with the prior art, the used permeation absorption wall is a movable assembled permeation absorption wall built by absorption bricks, which are produced through a forming process by adding a binding agent in such absorption materials as fly ash, clay and molecular sieves; the permeation absorption wall is spliced as cuboids with different specifications; and the method is combined with a chemical leaching method to exert the effects of leaching, absorption and heavy metal enrichment, can be used for a soil ectopia repair engineering technology, protects underground water, and shortens the soil repair treatment period. The method combines a physical method with a chemical method, is cheap in raw materials, easy to obtain the raw materials and low in operation cost, treats wastes by wastes, is short in soil treatment period, is obvious in energy saving advantages, and is broad in application prospect.

The invention discloses a modified polypropylene non-woven fabric, its preparation method and application. The preparation method comprises: impregnating a polypropylene non-woven fabric in a grafting solution containing a graft monomer, a crosslinking agent, a non-ionic surfactant and a photosensitizer, and initiating graft polymerization under ultraviolet irradiation, thus obtaining the modified polypropylene non-woven fabric, which can be widely used in adsorption separation treatments of dye wastewater, heavy metal ion wastewater, inorganic anion acid radical-containing chemical wastewater and the like as a filtering material. The modified polypropylene non-woven fabric provided by the invention has the characteristics of high mechanical strength, large water flux, and great saturated adsorption capacity. Meanwhile, after being subjected to a regeneration treatment in a cationic surfactant-containing ethanol solvent desorption solution, the adsorbed filtering material can be recycled.

The invention relates to a denitrification and VOC removing catalyst, and belongs to the field of environmental protection catalysts. According to the present invention, the Mo-V-W / TiO2-Al2O3 system is formed among various components of the catalyst, such that the functions of denitrification and VOC removing can be concurrently achieved under the effect of the active components such as Mo, V and W and the carrier TiO2-Al2O3, the structure of the tail gas filtration discharging equipment can be effectively simplified, and the environmental protection cost can be reduced; and the denitrification and VOC removing catalyst has the high dust interference resistance, and can provide the maximum filtration performance on the basis of no requirement of the frequent stopping-dust cleaning, such that the catalyst has advantages of uniform aging speed, strong filtration ability, and long service life.

The invention discloses an amino-functional ordered mesoporous carbon material and a preparation method and application thereof. The preparation method comprises the steps of carrying out concentrated nitric acid oxidation treatment on the ordered mesoporous carbon synthesized by soft template lines, and preparing the amino-functional ordered mesoporous carbon material under the action of a silane coupling agent. Through wet oxidation on the ordered mesoporous carbon, the concentration of hydroxyl groups in an ordered mesoporous carbon duct is remarkably improved. Through the organic silane coupling agent, silane groups containing amino can be uniformly grafted into the duct of ordered mesoporous carbon with ordered height and uniform pore size distribution. The technical problem that functional groups cannot be grafted directly caused by hydrophobicity and surface inertness of the ordered mesoporous carbon material is solved. Applied to Cr (VI) in an adsorption aqueous solution, the material has the advantages of being convenient to apply, and high in adsorption rate and adsorption volume.

The invention relates to a method for preparing a biomass absorbing agent capable of absorbing heavy metal ions in waste water efficiently and belongs to the fields of material preparation and waste water treatment. The method is characterized by comprising the steps of treating rice straw which is low in price and easy to obtain as raw materials, and conducting washing, drying, pulverization and screening. Firstly, the pretreatment is conducted through an acidic hydrogen peroxide solution, the method of conducting the heating and stirring in water bath is adopted for reaction, and the rice straw is filtered, washed to be neutral and dried. Then phosphoric acid or disodium hydrogen phosphate serves as the modifying agent, the straw which is obtained after the pretreatment is heated and stirred for reaction, after the reaction is ended, the straw is filtered, washed to be neutral and dried, and the needed heavy metal ion absorbing agent is obtained. The method has the advantages of being simple in preparation method, low in cost, free of secondary pollution and the like.

The present invention discloses a preparation method for three-dimensional layered CoV2O6 micro-nano powder. According to the present invention, cobaltous nitrate hexahydrate or cobalt chloride hexahydrate, sodium hydroxide or hydrochloric acid, and vanadium pentoxide as raw materials; and steps of mixing, hydrothermal reaction, separation, washing, drying and the like are performed to obtain the three-dimensional layered CoV2O6 micro-nano powder. The three-dimensional layered CoV2O6 product prepared by the method of the present invention is black powder, wherein the three-dimensional layered CoV2O6 product belongs to a triclinic crystal system, and has advantages of large specific surface area (86.8 m<2> / g), high purity and good product quality. In addition, the three-dimensional layered CoV2O6 micro-nano powder prepared by the method of the present invention provides characteristics of fast adsorption rate and large saturated adsorption capacity for methylene blue trihydrate in solutions, wherein the saturated adsorption capacity is up to165.6 mg / g when the pH value of the solution is 1.0.

The invention discloses a preparation method and application of a magnetic hollow graphene-based composite microsphere material. The preparation method comprises the following steps: taking a polymer microsphere with positive charges as a template, and obtaining the magnetic hollow graphene-based composite microsphere material through a high-temperature heat treatment one-step method. The preparation method provided by the invention is simple and feasible and has no environment pollution, and industrial production is easy to realize; meanwhile, the prepared magnetic hollow graphene-based composite microsphere material has a relatively large specific surface area and a developed pore structure, and can be used for efficiently and rapidly adsorbing and separating dye molecules. The magnetic hollow graphene-based composite microsphere material prepared by the preparation method has a wide application prospect in the aspect of treating dye wastewater.

The invention relates to a preparation method of a kind of modified silicon gel absorbing agent used for protecting on-vehicle fuel batteries, which belongs to the branch of the non-metallic inorganic material technology and is applied to the field of gas absorption and separation. The preparation method uses 3-aminopropyl triethoxysilane as amino modifying agents, uses tetraethoxy silane as silicon gel precursors, and prepares and obtains modified silicon gel with uniformly decorated amino groups in a porous silicon gel framework through adding a certain number of amino modifying agents in the gel forming stage. The absorbing agent can be used for removing a trace amount of sulfur dioxide in the air, so cathodic catalysts of on-vehicle proton exchange membrane fuel batteries are protected from the poisoning effect of the sulfur dioxide. Compared with the prior art, the invention has the following advantages that: (1) the obtained absorbing agent has better capability for absorbing the trace amount of sulfur dioxide than active carbon fiber, the effect is shown through longer penetrating time and larger saturation adsorption capacity, in addition, the absorbing agent still has good absorbing capability when the humidity is lower; and (2) the obtained absorbing agent has simple and convenient preparation method, the operation is easy, the condition is mild, and the effects of energy saving and environment protection can be obtained.

The invention discloses hollow structure biomass activated carbon fiber and a preparation method thereof. Metaplexis japonica seed hair fiber with a hollow structure is adopted as an activated carbonfiber precursor, and wax removal, phosphoric acid activation, low-temperature pre-oxidation and high-temperature carbonization are performed to prepare the hollow structure biomass activated carbon fiber with the high hollow structure; the prepared hollow structure biomass activated carbon fiber has the characteristics of light weight and double surfaces of an inner layer and an outer layer; compared with solid fiber, the specific surface area is significantly increased; by performance testing, the hollow structure biomass activated carbon fiber prepared with the method has the specific surface area which reaches up to 1,882.003 m<2> / cm<3> and the average pore diameter being 3.056 nm, and has developed mesoporous distribution; and an XRD result shows that a graphite-like microcrystalline refined structure appears in the biomass activated carbon fiber.

The invention relates to a series of nano-particle water purification materials, which take quartz sand or zeolite particle as a substrate, nanometer aluminum (iron) oxide or nanometer aluminum (iron) oxidized hydrogen oxide as a modified filtration coating, and can effectively and completely remove bacilli and virus from wastewater and sewage. The invention also relates to a preparation method of the nano-particle water purification materials. In the preparation method, acidic solution with 40 to100 meshes of quartz sand or 60 to120 meshes of clinoptilolite is poured into secondary deionized water, uniformly mixed and heated, nano-aluminum powder, aluminum nitride powder or iron powder is poured into the acidic solution and ultrasonically mixed and ethanol solution of ester is then poured into the mixed acidic solution, ultrasonically mixed again, filtrated and dried so as to gain nano-fibriform AlO(OH) or FeOOH which is the particle water purification materials of filtration coating which are further roasted so as to gain Gamma-Al2O3 or Fe2O3 which is the particle water purification materials of filtration coating. The nano-particle water purification materials of the invention have the advantages of strong removal ability, high cleanliness, great saturated adsorption capacity, etc.

The present invention discloses a manufacture and use method for an indoor organic polluting gas purificant. The method comprises the following steps: (1) waste pericarps and other vegetable cutins are collected, and residual pulps and other sundries are removed to get natural vegetable cutins and biological polymers; (2) the vegetable cutins are dried, crushed and filtered with a sieve of 10 to 200 eyes; (3) hydrochloric acid with the concentration of 0.5-6mol / l is added; then after the vegetable cutins with the hydrochloric acid are heated in a water bath for 0.5 to 6 hours, the cutins are flushed with water to be neutral, and a green purificant is got; (4) the green purificant is used absorb and treat organic pollutants in the indoor air; after the purificant is saturated, the purificant is heated under the temperature of 70 to 100 centigrade degrees for 0.5 to 2 hours to be regenerated and recycled. The purificant manufactured with the present invention is provided with the rapid and highly-efficient performance of absorbing the indoor organic pollutants. The absorption capacity reaches as high as 2.0g / g. Moreover, the purificant is free of the temperature, the humidity and co-existing organic pollutants and in particular applicable for purification of indoor compound pollutants. The purificant is cheap and easily obtainable, and can be recycled and regenerated.

The invention discloses a desulfurization wastewater dechlorination treatment method and desulfurization wastewater treatment equipment. The method comprises the following steps: A, firstly, adding anacid into the desulfurization wastewater to adjust the pH value to 0.5-4, and then stirring and mixing with a liquid resin; B, separating an obtained mixture in a separation chamber; C, enabling theseparated liquid resin to enter a liquid resin buffer tank, and enabling separated desulfurization wastewater to enter a next-stage reactor for further treatment; and D, repeating the steps A, B and Cin the treatment process, removing the liquid resin dissolved in the water in an air floatation oil removal device, taking the desulfurization wastewater treated through air floatation treatment andpH adjustment as reuse water, and conveying the liquid resin brought out by bubble floatation into the liquid resin buffer tank. The method has the advantages that the equipment investment is small, the operation cost is low, the produced water after chloride ion removal can meet the industrial water recycling requirement, no waste is generated in the treatment process, real-time adsorption and real-time regeneration are achieved in the reaction process, 100% removal of chloride ions can be achieved, the whole process is continuously operated, waiting and time delay are not needed, and the production efficiency is high.

The invention relates to a preparation method of a copper ion adsorbent based on a metal-organic framework material and discloses an inorganic-organic hybrid material for treating copper-containing wastewater and a preparation method thereof. The inorganic-organic hybrid material adsorbent is prepared by a post-synthetic modification method of a metal-organic framework. In comparison with other adsorption materials, the hybrid material has high adsorption capacity (42.70 mg / g). As a mercapto group is used as an adsorption site of the hybrid material, adsorption speed of metal ion is faster (15 min), and copper ion can be separated efficiently. In addition, the adsorbent has good stability and can be repeatedly used for at least 30 times. Thus, use cost is reduced.

The invention provides a method for preparing a needle-sized nanometer iron oxide adsorbent. The method comprises the following steps: respectively dissolving inorganic iron salt and urea in a mixtureof glycerol and deionized water to obtain a mixed solution; stirring the mixed solution, ultrasonically dissolving the mixed solution, then transferring the material to a high-pressure reaction vessel with a polytetrafluoroethylene liner for a solvothermal reaction to form a precipitated product in the reaction vessel; and performing steps of washing centrifugation and drying to obtain the needle-sized nanometer iron oxide adsorbent. The needle-sized nanometer iron oxide adsorbent prepared by the invention has stable performance, has good adsorption capacity for anionic dyes such as Congo red, and can be used for efficiently treating the pollution problem of the organic pollutant Congo red in the water body; the organic solvent used in the preparation process is used with a small amount,and the harm to the environment is low; the treatment of the organic dye Congo red-polluted water body does not cause secondary pollution; the method is simple and easy to prepare, the preparation conditions are mild, the raw materials are cheap and easy to acquire, and the process cost is low.

The invention discloses a method for removing dissolved organic matter and heavy metal ions in electroplating waste water. The method involves a pH value regulation tank and a filler tower capable of effectively removing dissolved organic matter and heavy metal ions. Modified kieselguhr and activated carbon serve as double-layer filler of the filler tower, and after being adsorbed by the filler, electroplating waste water reaches the national emission standard. The method is an environment-friendly green waste water treatment process which is high in organic matter and metal heavy ion removal rate, low in one-time investment, easy to run and operate and low in production treatment cost.

The invention discloses a preparation method and an application of a mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent which can be used for solving the pollution problem of heavy metal Cr (VI) in water. The preparation method of the adsorbent comprises the steps as follows: inorganic iron salt, an amide precipitator and a mesoporous template agent are mixed and dissolved in pure water; the solution is subjected to a hydrothermal reaction after being sealed; a precipitate obtained after the reaction is filtered, washed and dried, and a precursor is obtained; the precursor is calcined and theadsorbent is obtained. The prepared efficient mesoporous hydroxyl-ferric oxide adsorbent has good adsorption capacity for Cr (VI), high saturation adsorption capacity, high adsorption rate and low equilibrium concentration. The raw materials used in the method are cheap, easy to obtain, green and environmentally friendly, the preparation method is simple and adopts mild conditions, and the prepared low-cost adsorbent which has excellent adsorptive performance for highly toxic pollutant Cr (VI) has important scientific significance and good application prospects.

The invention relates to a method for separating halogenated olefin impurities from 2-chloro-1,1,1,2-tetrafluoropropane. The method comprises the following steps: adding the 2-chloro-1,1,1,2-tetrafluoropropane containing the halogenated olefin impurities into an adsorbent and absorbing halogenated olefins; the solid adsorbent is a copper-modified high-silicon ZSM-5 molecular sieve adsorbent. The absorption method adopted by the invention has the advantages that the saturated adsorption quantity is large, the adsorption quantity of the adsorbent for the halogenated olefins reaches 0.8, the content of HCFO-1233xf in absorbed HCFC-244bb is less than 700 ppm, the purity of the HCFC-244bb reaches above 99.6 percent, and the like. In addition, the adsorbent adopted by the invention has the advantage of HF resistance and is suitable for industrial production equipment.

The invention relates to phosphoric acid modified silicon dioxide microspheres as well as a preparation method and application thereof. During preparation, firstly, 3-aminopropyl is introduced to the surfaces of the silicon dioxide microspheres, then phosphoric acid is grafted to the surfaces of the 3-aminopropyl functionalized silicon dioxide microspheres, and the silicon dioxide microsphere material with the surface modified with phosphoric acid is prepared. The material is simple in preparation process and mild in reaction condition, and is successfully applied to removal of oxyacid radical ion pollutants in water.

The invention relates to a preparation method of an ion-imprinted blended membrane. The method comprises steps as follows: (1) synthesis of a macromolecular chain transfer agent: the macromolecular chain transfer agent is synthesized from methyl methacrylate and an RAFT reagent in a preset proportion of a thermal initiator; (2) synthesis of an amphiphilic block functional copolymer: the amphiphilic block functional copolymer is synthesized from 4-vinylpyridine, the thermal initiator and the macromolecular chain transfer agent synthesized in the step (1); (3) synthesis of a template ion-high-polymer complex; (4) membrane casting: the template ion-high-polymer complex in the step (3) and a membrane matrix are dissolved in a solvent in a preset proportion and stirred for preset time to be uniformly mixed, a membrane casting solution is obtained, and membrane casting is performed after bubbles are removed from the membrane casting solution; (5) elution. In the membrane forming process, a hydrophilic block can rapidly move to the surface of the membrane, the condition of difficulty in elution due to too deep embedding of template ions by PVDF (polyvinylidene fluoride) can be avoided, more binding sites are produced on the surface of the membrane, and the adsorption selectivity and the adsorption capacity of the ion-imprinted blended membrane are increased.

The invention discloses a purification and ventilation system for a sterile workshop. The purification and ventilation system for the sterile workshop comprises a housing, an air inlet port, a first filter device, a sterilization device, an air inducing device, a second filter device and an air outlet device, wherein the first filter device comprises a first filter cavity, an air guide device anda first filter layer; the air guide device comprises a plurality of air guide plates; a plurality of bulges are arranged on each air guide plate; the sterilization device comprises a sterilization cavity, a sterilization pipe and an ultraviolet lamp; the air inducing device comprises an air inducing chamber, an air inducing fan and a heat dissipator; the second filter device comprises a second filter cavity, as well as an aluminum alloy filter screen, a honeycomb activated carbon filter screen and a cold catalyst filter screen which are sequentially arranged in the second filter cavity; and the air outlet device comprises an air outlet port, an air outlet cavity, a negative-ion generator and a micro-fan. The invention provides a purification and ventilation system for a sterile workshop, solves the problems that sterilization and disinfection cannot be carried out on the interior of a workshop, bacteria are easily bred in the workshop, and adverse influence is brought to personnel health and production, in the prior art, and improves the effects of purification, and sterilization and disinfection for the sterile workshop.

The invention relates to a nicotine adsorbent and a preparation method thereof. The nicotine adsorbent is prepared by mixing mordenite raw powder and attapulgite powder in proportion and granulating the mixture. The preparation method comprises steps as follows: mixing of powdery materials: the mordenite raw powder and the attapulgite powder are uniformly added to a stirrer in the weight ratio being 4: (1-1.5) and stirred and mixed for 1.5-2.5 hours in the mixing stirrer; forming and granulation: a plurality of seeds are put in a granulator, the powdery materials are continuously added to the granulator, meanwhile, water mist is sprayed, the seeds grow to be adsorbent granules, and when the adsorbent granules reach predetermined specifications, the granules roll out of a discharge port of the granulator and conveyed to a vibrating sieving machine to be sieved; the water consumption in the whole forming and granulating processes doesn't exceed 35% of the weight of the powdery materials. The nicotine adsorbent has high nicotine adsorption capability, adsorption speed, saturated adsorbing capacity and adsorption rate and can realize thorough adsorption; the preparation method of the adsorbent is simple, convenient and low in production cost.

The invention discloses a method for acquiring isoparaffin from long-carbon-chain mixed n-alkanes and isoparaffin. The method includes steps of absorbing and separating raw materials to be separated through a first absorption separation zone, a second absorption separation zone and a third absorption separation zone, and acquiring isoparaffin, wherein the raw material to be separated is a mixed liquid of n-alkanes and isoparaffin containing 8-22 carbon atoms; the carbon atom intercepted by the first absorption separation zone is 8-14 n-alkanes, the carbon atom intercepted by the second absorption separation zone is 15-18 n-alkanes, and the carbon atom intercepted by the third absorption separation zone is 19-22 n-alkanes. The method has significant absorbing effect, and can completely absorb the of n-alkanes from the complex long-carbon-chain mixed n-alkanes and isoparaffin containing 8-22 carbon atoms, and acquire high-purity isoparaffin; besides, the method is low in cost of absorbing process and easy to realize the industrial production.

The invention relates to a preparation method of modified steel slag for removing arsenic from water body. The preparation method comprises the following steps: cleaning the steel slag, and drying thesteel slag until the weight of the steel slag is constant for standby use; adding the steel slag which is dried to the constant weight into a culture solution comprising iron oxidizing bacteria, performing erosion soaking, and obtaining modified steel slag. The preparation method has the beneficial effects that the modified steel slag prepared by the invention has the characteristics that the modification method is simple, the cost is low, raw materials are easy to obtain, and the effect for removing arsenic from water is apparent; compared with the original steel slag, the adsorption capacity of the modified material for the arsenic is increased by 32.2 to 41.3 percent; in addition, the adsorption effect is little influenced by the temperature, the adsorbed arsenic cannot be desorbed inneutral water after the saturated adsorption, the modified steel slag is high in arsenic removal efficiency and high in saturated adsorption capacity, the material is stable after the adsorption, thesecondary pollution is avoided, and the recycling of solid waste is realized.

The invention discloses a hollow octahedral NaP molecular sieve and a synthesis method thereof, and belongs to the technical field of inorganic chemistry. The method comprises the following steps: preparing a reaction mixture solution from various idle or waste molecular sieves, sodium hydroxide and distilled water as raw materials, stirring at room temperature, transferring to a high-pressure reaction kettle, filling into a homogeneous reactor, crystallizing at 140-200 DEG C at the rotating speed of 15r / min, filtering, washing, drying and calcining to directly obtain the hollow octahedral NaP molecular sieve. The molecular sieve is a hollow octahedral molecular sieve (4-6 [mu] m) formed by stacking flaky NaP molecular sieves (300-600 nm), the shell thickness is 500-700 nm, and the molecular sieve has hierarchical pore characteristics and comprises octahedral core hollow macropores, mesopores formed by stacking the NaP molecular sieves on the shell and micropores of the NaP molecular sieves. The preparation process is simplified, special generation equipment and process requirements are avoided, the requirement of'green chemistry 'is met, and industrial production is facilitated.

The invention discloses a simultaneous desulfation, denitration and mercury removal device, relating to mercury removal devices for flue gases of coal-fired power plants. The device is provided with a simulated flue gas generating unit, a plasma oxidation unit, an activated carbon adsorption unit and a flue gas ingredient detection unit, wherein pipes of the simulated flue gas generating unit, the plasma oxidation unit, the activated carbon adsorption unit and the flue gas ingredient detection unit are connected through rotary valves and Y-shaped three-way joints; the simulated flue gas generating unit is provided with a N2 cylinder, a CO2 cylinder, a SO2 cylinder, an O2 cylinder, a NO2 cylinder, a HCl cylinder, a NO cylinder, a mass flow controller, a Hg0 permeation tube and a thermostatic water bath; a gas washing bottle is arranged in the thermostatic water bath; the plasma oxidation unit is provided with a high-voltage power supply and a plasma reactor; the plasma reactor is provided with a quartz dual-dielectric layer; the activated carbon adsorption unit is provided with a thermostatic baking box and an adsorption reactor; and the detection unit is provided with a flue gas analysis unit and a Hg0 analysis unit.

The invention relates to a preparation method for a formaldehyde adsorbent, and belongs to the technical field of the air purification. The preparation method comprises the following steps: uniformlymixing a MOR molecular sieve and manganese sulfate water solution, placing in a muffle furnace for roasting, naturally cooling to a room temperature, to obtain MnO2-MOR; placing the prepared MnO2-MORin copper nitrate and performing ion exchange, to obtain a product of the formaldehyde adsorbent. The preparation method is capable of enabling the MnO2 to be placed in pore channels of the MOR molecular sieve by using a method of directly roasting, and substituting sodium ions by copper ions through an ion exchange method, and enabling the copper ions to be placed in the pore channels of the molecular sieve, thereby improving a formaldehyde adsorption rate. Compared with the existing formaldehyde adsorbent, the adsorbent is stronger in formaldehyde adsorption, large in saturation adsorption quantity, complete in adsorption, and simple in preparation process, and secondary release cannot be generated.