31 results about "Catalyst degradation" patented technology

The present invention provides a catalyst regeneration apparatus and a catalyst regeneration method that can regenerate a degraded catalyst while suppressing a decrease in production efficiency during the production of a predetermined product. [Solution] A catalyst regeneration device for a reactor 3 that produces a predetermined product by catalytic action of catalysts in each reaction tube 2 using a plurality of reaction tubes 2, each filled with catalyst C, while continuing to introduce the raw material gas, the device comprises a catalyst degradation detection unit for detecting whether or not the catalyst C in each of the plurality of reaction tubes 2 has deteriorated, a regeneration gas supply unit 6 capable of supplying a predetermined regeneration gas to each reaction tube 2 for regenerating the deteriorated catalyst C, and a control unit 7 that controls the regeneration gas supply unit to supply regeneration gas to the reaction tube 2 having a catalyst C that has been detected to have deteriorated based on the detection results from the catalyst degradation detection unit.

The invention discloses an anti-reverse electrode, a preparation method thereof and a membrane electrode, and the preparation method of the anti-reverse electrode comprises the following steps: dispersing titanium oxide in isopropanol to obtain a first mixed solution; mixing the first mixed solution with a Nafion resin solution to obtain a second mixed solution, and performing vacuum drying on the second mixed solution to obtain a Nafion resin-titanium oxide compound; putting the Nafion resin-titanium oxide compound and a platinum-carbon catalyst into a ball-milling tank according to a preset proportion, and carrying out ball-milling treatment to obtain mixed slurry; a preset carrier is coated with the mixed slurry in a blade coating mode, an anti-reverse-pole catalyst layer is formed on the preset carrier, and the anti-reverse-pole electrode is obtained. The Nafion resin-titanium oxide compound is introduced, stable perfluorinated sulfonic acid resin and a pore network are constructed, an efficient transmission path can be provided for protons and gas, the influence of catalyst degradation and structure change on performance is reduced, and the overall efficiency of the battery is improved.

The invention discloses a method for preparing a confined iron-based porous carbon catalyst from a compound extracted from printing and dyeing alkali-decrement white mud and application of the confined iron-based porous carbon catalyst. The specific method is as follows: the printing and dyeing alkali-decrement white mud is uniformly dispersed in an organic solvent, filtrate containing terephthalic acid is extracted through oscillation and suction filtration, then ferric trichloride hexahydrate is dropped into the filtrate, and the filtrate is filtered to obtain the confined iron-based porous carbon catalyst. Performing stirring hydrolysis and hydrothermal reaction to synthesize an MIL-101 (Fe)-W precursor, and performing pyrolysis in an inert atmosphere to obtain the confined iron-based porous carbon catalyst Fe (at) C-W. The catalyst has a high specific surface area and a confinement structure, and the prepared catalyst can be used for activating hydrogen peroxide to degrade organic pollutants. The industrial waste is recycled, and the catalyst is high in degradation efficiency, suitable for a wide pH range and good in stability.

This invention discloses a membrane electrode testing method and apparatus. The method involves cycling the membrane electrode multiple times, with each cycle including an anolyte voltage cycle durability test and a reverse polarity resistance test, thereby achieving durability testing of the anolyte catalyst layer. The anolyte voltage cycle durability test primarily addresses the impact of vehicle start-stop processes on the membrane electrode; therefore, this method considers the anolyte catalyst degradation caused by start-stop cycles. The reverse polarity resistance test corresponds to hydrogen starvation conditions. In other words, this method and apparatus simultaneously consider both anolyte reverse polarity and anolyte catalyst degradation caused by start-stop cycles, enabling rapid testing of the membrane electrode's lifespan and durability based on the start-stop and reverse polarity processes occurring on the anode side, thus improving test accuracy.

A working machine, an oxidation catalyst degradation detection device, an oxidation catalyst degradation detection method, and an oxidation catalyst degradation detection program are provided, which enable a suitable detection of a degradation of an oxidation catalyst. A working machine includes a temperature detecting device for detecting a temperature between an oxidation catalyst and a filter, and a controller. The controller calculates an average of temperatures detected by the temperature detecting device in a regeneration processing of the filter, and calculates a degradation degree of the oxidation catalyst on the basis of the calculated average.

The invention belongs to the technical field of degradation of rhodamine B by a cobalt-based catalyst, and particularly relates to experimental equipment and a method for degrading rhodamine B by a biomass charcoal modified cobalt-based catalyst. The experimental equipment comprises a catalyst preparation mechanism; the catalyst preparation mechanism is placed at the left end of the table top, and the catalyst preparation mechanism is used for preparing cobalt-based catalysts with different lignin addition amounts; the catalyst preparation mechanism is arranged at the right end of the table top, the solution preparation and adsorption mechanism is arranged at the right end of the catalyst preparation mechanism, the solution preparation and adsorption mechanism is placed at the right end of the table top, and the solution preparation and adsorption mechanism is used for preparing an RhB solution and a PMS solution. The experiment can be more coherent, and multiple complex procedures of the experiment are reduced, so that the experiment speed is increased, and meanwhile, experiment substances can be displayed more clearly.

The invention relates to the technical field of sewage treatment, in particular to a method for degrading organic pollutants by coupling a low-temperature plasma with a nano-catalyst, which comprises the following steps: preparing an MCIN magnetic iron-carbon-based nano-catalyst, respectively dissolving ferric chloride hexahydrate and fumaric acid in ultrapure water, mixing and stirring, carrying out hydrothermal reaction to generate an MIL-88A precursor, and preparing the MCIN magnetic iron-carbon-based nano-catalyst. And carrying out high-temperature calcination in a nitrogen atmosphere to obtain the MCIN catalyst. By preparing the nano-catalyst which has the characteristics of low cost and easy separation and can efficiently utilize active oxygen species and applying the nano-catalyst to a low-temperature plasma-catalyst coupling system, on one hand, the active oxygen species generated by plasma can be more efficiently utilized to realize efficient removal of refractory organic pollutants in wastewater; on the other hand, secondary pollution caused by the fact that a conventional catalyst is difficult to separate is avoided, in addition, the adopted iron-carbon-based catalyst is low in cost, and a coupling system of the plasma and the catalyst is further optimized.

The invention discloses a catalyst for photodegradation of polyurethane, a degradation method, a preparation method and a recovery method. The invention provides a degradation method of polyurethane. The degradation method comprises the following step: irradiating a mixture of a catalyst, a solvent and polyurethane with light. According to the degradation method disclosed by the invention, the polyurethane material can be rapidly degraded in a heterogeneous phase, the time required for degrading the polyurethane material is greatly shortened, the treatment requirement of the polyurethane material is reduced, a bulk material can be directly degraded without disassembling, crushing and dissolving processes, and the material does not need to be crushed into powder and then degraded; and moreover, the conversion rate of waste polyurethane is high, and degradation products only comprise polyhydric alcohols and corresponding organic amines, and are high in purity and easy to separate.

Catalyst regeneration equipment for regenerating a catalyst that has been degraded due to a catalytic action, while a predetermined source gas is being continuously introduced, in a reactor including a plurality of reaction tubes each being filled with the catalyst, the reactor generating a predetermined product through the catalytic action of the catalyst in each of the plurality of reaction tubes, the catalyst regeneration equipment including: a catalyst degradation detection unit configured to detect presence or absence of degradation of the catalyst in every one of the plurality of reaction tubes; a regeneration gas supply unit capable of supplying a predetermined regeneration gas for regenerating a degraded catalyst to every one of the plurality of reaction tubes; and a controller configured to control the regeneration gas supply unit to supply the regeneration gas to a reaction tube including the catalyst in which the degradation has been detected, based on a detection result by the catalyst degradation detection unit.

The application provides a bismuth oxide carbonate photocatalyst and a preparation method and application thereof, the bismuth oxide carbonate photocatalyst is prepared through a hydrothermal auxiliary co-precipitation strategy, has high efficient catalytic degradation performance on organic dyes under visible light conditions, and can be suitable for degradation of pollutants in complex water bodies; and the halogen element introduced in the application can obviously enhance the photocatalytic performance of the bismuth oxide carbonate photocatalyst on degradation of organic pollutants, can eliminate the organic pollutants in water bodies at an extremely fast speed, and has a wide applicable prospect in the field of wastewater treatment.

The invention relates to the technical field of unsymmetrical dimethylhydrazine degradation, and provides nitrogen-doped graphene oxide and application of the nitrogen-doped graphene oxide in activation of unsymmetrical dimethylhydrazine in a PDS degradation environment in order to solve the problem of how to efficiently activate PDS to degrade unsymmetrical dimethylhydrazine. The preparation method comprises the following steps: step 1, putting a graphene oxide solution into a beaker, weighing urea, putting the graphene oxide solution and the urea into the beaker, uniformly stirring with a glass rod, and pouring into a porcelain boat; and 2, putting the porcelain boat into a tubular furnace, introducing nitrogen to exhaust oxygen in the boat, carrying out heat treatment, naturally cooling, and taking out the porcelain boat to obtain a fired material, namely the nitrogen-doped graphene oxide, and further grinding the nitrogen-doped graphene oxide into powder. The nitrogen-doped graphene oxide is combined with PDS, and the nitrogen-doped graphene oxide is used for preparing a UDMH degradation material. According to the prepared catalyst, the degradation rate is greatly increased, the degradation rate is increased along with increase of the adding amount, and the degradation rate of the catalyst with the concentration being 0.4 g / L is the highest and is 97.18%.

This invention relates to a method for preparing and applying a metal atom-supported reduced graphene oxide catalyst, specifically a method for preparing and applying a metal atom-supported reduced graphene oxide catalyst. The invention aims to address the technical problems of high energy consumption, high cost, and easy secondary pollution associated with existing catalysts for the degradation of organic pollutants. This invention involves in-situ growth of transition metals on the GO surface to dope the ZIF-8 precursor, effectively improving the interfacial bonding between the precursor and the carbon support, and preventing the loss or migration of active components during subsequent pyrolysis. During pyrolysis and carbonization, the M-ZIF-8 precursor decomposes to form a nitrogen-containing carbon framework, and the transition metal species are supported on the reduced graphene oxide support in an atomically dispersed or highly dispersed form. The resulting catalyst possesses abundant active sites and excellent electron transport properties, and can be applied in electrocatalysis and the degradation of organic pollutants.

Disclosed in the present invention are a method for preparing a double-anion catalyst and the use thereof in the catalytic degradation of a polyurethane material. The method comprises: dissolving a metal salt in deionized water to prepare a metal salt solution; taking a nitrogen heterocyclic compound containing hydroxyl or amino as a substrate in a reactor, adding the metal salt solution in a dropwise manner into the reactor, and performing condensation reflux at 60°C-150°C for 1-8 h; adding an amine compound in a dropwise manner, reacting the mixture after the dropwise addition has finished, and performing a vacuum filtration treatment after the reaction has finished, so as to obtain a filtrate; and evaporating the filtrate and drying the product to obtain a double-anion catalyst. The basic physical properties, such as hydroxyl value, amine value and viscosity, of a recovered polyol obtained via degradation by means of the catalyst of the present invention are substantially equivalent to those of the raw material polyol, and the recovered polyol can partially replace the raw material polyol for preparing a flexible polyurethane foam.

This invention proposes an AOP water-catalyst degradation and separation food purification machine, belonging to the field of food purification machines. The invention includes a purification machine component, a draining component installed vertically within the purification machine component, a circulation component located at the rear of the purification machine component for circulation, and a drainage component for drainage. The purification machine component includes: a purification chamber; a vertical partition fixed in the middle of the purification chamber; and horizontal support plates welded to the left and right sides of the vertical partition, the horizontal support plates dividing the purification chamber into a cleaning chamber and a return water chamber. The draining component includes: a drain basket body located above the horizontal support plates; and the drainage component. This invention, through the drainage component, simultaneously pushes the entire drain basket body upwards during drainage. When the drain basket body is removed, the water level in the cleaning chamber simultaneously decreases, thereby preventing wastewater from splashing out when the drain basket body is removed.

The present invention aims to provide a method for producing olefins using waste plastic raw materials, which enables sufficient catalyst regeneration while suppressing catalyst degradation. [Solution] A method for producing olefins, comprising: a thermal decomposition step of thermally decomposing a waste plastic raw material containing polyolefin to obtain a hydrocarbon flow; a crude olefin production step of supplying the hydrocarbon flow to a catalytic cracking apparatus that decomposes hydrocarbons by contacting a catalyst containing zeolite with hydrocarbons to obtain crude olefins; a separation step of separating olefins having 2 to 4 carbon atoms from the crude olefins; a hot air generation step of generating hot air containing oxygen gas using a hot air generator; and a catalyst regeneration step of supplying the hot air to a catalyst regeneration apparatus that regenerates a catalyst by heating, regenerating the catalyst used in the crude olefin production step with the hot air, and returning the regenerated catalyst to the catalytic cracking apparatus.

The current invention describes the synthesis of heterogeneous composite comprising laponite and heptamolybdate by wetness impregnation method. Different experimental settings were used to carry out the synthesis, including the heptamolybdate ammonium dose (1.5, 1 or 0.5 g), ion exchanger dose tetrabutyl ammonium bromide (0.5, 0.25 or 0.125g), reaction duration (12 or 24h) and calcination temperature (200, 300 and 400 °C) for 2 hours. The optimal synthesis composition of the laponite / molybdate (Lap-Mo) is as follows: 5 g of Lap + 0.5 g of TBA + 1.5 g of heptamolybdate ammonium with reaction duration of 24 h and a calcination temperature of 300 °C for 2 hours under air. The laponite / molybdate composite have been used in an AOP to degrade MB dye in presence of H2O2 as an oxidant under visible light radiation. The AOP experiment have been optimized using RSM based on BBD. Under the optimum conditions: contact time=72 min, [H2O2 / Lap-Mo] wt% ratio= 1.24, dye concentration= 20.95 mg.L-1 pH= 8.3 reaching a 99% of degradation rate. The Lap-Mo catalyst degradation efficiency was also tested for other dyes such as safranin T (ST) and rhodamine B (RhB) as cationic dyes and methyl orange (MO) as anionic dye. Indeed, they exhibits a highly degradation rate equal to 96, 90 and 89% for ST, RhB and MO, respectively. Advantageously, the invention intends to promote, profitably, and efficiently dye degradation using the laponite / molybdate composite. Furthermore, the potential of the invention falls within the framework of improving wastewater treatment and paves the way to more areas of application in multiple industries.

A preparation method of a dual-anion catalyst, and a use of the dual-anion catalyst in catalytic degradation of a polyurethane material are provided. The preparation method includes: dissolving a metal salt in deionized water to produce a metal salt solution; adding a nitrogen-containing heterocyclic compound with hydroxyl or amino as a substrate to a reactor, adding the metal salt solution dropwise to the reactor, and conducting condensation reflux at 60° C. to 150° C. for 1 h to 8 h; adding an amine compound dropwise, and conducting a reaction; after the reaction is completed, conducting vacuum filtration to produce a filtrate; and subjecting the filtrate to evaporation, and oven-drying a resulting product to produce the dual-anion catalyst. A recovered polyol obtained through the degradation with the catalyst exhibits basically the same fundamental physical properties such as hydroxyl value, amine value, and viscosity to a virgin polyol.

This invention provides a catalyst degradation diagnosis device and method that eliminates the need for floating-point calculations, enabling catalyst degradation diagnosis through simple calculations. The catalyst degradation diagnosis device includes: a catalyst disposed in the exhaust passage of an internal combustion engine; an upstream oxygen concentration detection unit disposed upstream of the catalyst; a downstream oxygen concentration detection unit disposed downstream of the catalyst; an upstream determination counting unit that counts the number of upstream determinations; and a downstream determination counting unit that counts the number of downstream determinations. When the number of upstream determinations in the upstream determination counting unit reaches a predetermined number, a catalyst degradation index value is calculated using the upstream and downstream determination counts. The counts in the upstream and downstream determination counting units are then reset. Catalyst degradation is diagnosed by comparing the catalyst degradation index value with a catalyst degradation index threshold.

This invention discloses a two-dimensional layered Ta4C3-supported Bi2WO6 composite catalyst, its preparation method, and its applications. The invention involves etching the Al atomic layers in the MAX phase Ta4AlC3, then preparing a single-layer MXene material Ta4C3 through exfoliation, and finally generating Bi2WO6 nanospheres in situ on the Ta4C3 surface via a hydrothermal method to obtain the two-dimensional layered Ta4C3-supported Bi2WO6 composite catalyst. This two-dimensional layered Ta4C3-supported Bi2WO6 composite catalyst enhances the electron transfer capability of Bi2WO6, broadens the visible light absorption wavelength range of Bi2WO6, reduces the electron-hole recombination rate, and improves photocatalytic performance. Under 60 min of illumination, the degradation efficiency of the two-dimensional layered Ta4C3-supported Bi2WO6 composite catalyst reaches 65% for dodecylmorpholine, with no other energy consumption, making it safe and environmentally friendly. This is of great significance for the low-energy and pollution-free treatment of dodecylmorpholine, a flotation agent in salt lake brine.

The present application relates to a cellulose-based iron / molybdenum-carbon nanocomposite catalytic material, a preparation method thereof and application thereof in degrading pollutants, the composite catalytic material is prepared by taking cellulose and ionic liquid as raw materials, making cellulose-based hydrogel, adsorbing ferrous sulfate and ammonium molybdate, drying, and synthesizing iron-carbon composite catalyst or iron / molybdenum-carbon-based composite catalyst through high-temperature carbonization, and can be used for activating persulfate to catalytically degrade antibiotic wastewater. The preparation method of the present application realizes the resource utilization of waste, successfully synthesizes a catalyst with high efficiency in activating persulfate, has good degradation effect, is used for activating persulfate to degrade antibiotic wastewater, has high activation performance, strong Fe 3+ / Fe 2+ cycle ability, effectively realizes the cycle between Fe 3+ and Fe 2+ in the iron-based catalyst-persulfate advanced oxidation process, has good treatment effect on antibiotic wastewater, and realizes effective utilization of natural resources.

The invention relates to the technical field of electroplating waste liquid treatment, in particular to an electroplating waste liquid multi-stage treatment method which comprises the following steps: performing pH regulation and homogenization pretreatment on waste liquid, enabling the waste liquid to enter a catalytic reaction stage, degrading organic pollutants under the synergistic effect of ultrasonic waves and a catalyst, and recovering heavy metals through an electrochemical method. And finally, the electroplating waste liquid is recycled after deep treatment by a membrane system, and efficient purification of the electroplating waste liquid is realized through a three-stage treatment flow of a pretreatment stage, a catalytic reaction stage and a deep treatment stage in combination with ultrasonic activation, electrochemical catalysis and membrane separation technologies. The method solves the problems of low treatment efficiency and difficulty in heavy metal recovery in the traditional method, the treatment efficiency is improved by more than 40%, the heavy metal recovery rate is more than or equal to 95%, and the effluent can reach the standard for reuse.

The application discloses a kind of double built-in electric field ternary heterojunction photocatalyst and preparation method thereof.The catalyst is composed of bismuth vanadate, manganese sesquioxide and nickel carbide;The mass ratio of bismuth vanadate, manganese sesquioxide and nickel carbide is 10-5:2-1:1;Bismuth vanadate, manganese sesquioxide and nickel carbide in the photocatalyst form Z-type heterojunction structure.The catalyst is prepared by hydrothermal method and electrostatic self-assembly method, by strictly controlling the proportion of each component and reaction parameter, realize the Z-type heterojunction structure of bismuth vanadate, manganese sesquioxide and nickel carbide, greatly improve the visible light absorption and the performance of carrier recombination inhibition of catalyst.The catalyst based on the synergistic effect of double built-in electric field, Z-type inhibition junction structure and catalyst magnetism, so that the catalyst has excellent photocatalytic activity, by testing, using the catalyst to degrade BP-3, 30min within degradation rate is 60%, 60min degradation rate is 90%.

The present application relates to a method for solvent-free catalytic degradation recycling of polyethylene terephthalate, and belongs to the technical field of catalytic degradation recycling of polyethylene terephthalate. The polyethylene terephthalate is mixed with a catalyst, and then heated to degrade the polyethylene terephthalate to obtain an intermediate product, bisvinyl terephthalate. The bisvinyl terephthalate is then soaked in an alkali solution to hydrolyze the bisvinyl terephthalate to obtain terephthalate and ethylene glycol. The white solid obtained after filtration is the recovered catalyst. An acid solution is added to the filtrate to react the terephthalate to obtain terephthalic acid solid. The terephthalic acid is recycled after solid-liquid separation. The ethylene glycol is obtained after distillation of the filtrate, and the ethylene glycol is recycled. The present application does not use organic solvents, has low cost, short degradation time, fast reaction speed, low reaction temperature, high yield, and the catalyst can be recycled and reused. The whole reaction is carried out at normal pressure without the need for a protective gas.

This invention discloses a light-free carbon nitride photocatalyst, its preparation method, and its application in the degradation of pollutants in water using activated persulfate. It belongs to the field of environmental pollution removal technology. This invention obtains a light-free carbon nitride photocatalyst by high-temperature calcination of 2,5-thiophene-dicarboxylic acid, nickel acetate tetrahydrate, and cobalt acetate tetrahydrate with urea. Its activated persulfate can efficiently degrade various high-concentration pollutants without light exposure. 15 mg of this catalyst can degrade 50 mg of persulfate. ‑1 The degradation rates of methyl orange, methylene blue, rhodamine B, tetracycline, ciprofloxacin, and metronidazole reached 100% (1 min), 100% (2 min), 99% (5 min), 97% (30 s), 97% (20 min), and 88% (30 min), respectively; after five consecutive cycles, 50 mg L of the product was degraded. ‑1 Tetracycline, degradation rate >96%; 10 mg of this catalyst degrades 50 mg L in different water sources. ‑1 Tetracycline degradation rate >95%. High degradation efficiency, high stability and versatility indicate that this catalyst has great potential for application in the field of water pollution control.

The invention discloses a catalyst for degrading PET (Polyethylene Terephthalate), a degradation method, a preparation method and a recovery method. According to the method, the waste PET can be degraded in a mild and environment-friendly manner without additional pressurization under the illumination condition. According to the method, the degradation can be directly carried out without stirring or additional heating or pre-crushing the cloth or the film. Through simple post-treatment steps, the high-purity terephthalic acid diester compound can be efficiently recovered. According to the method, the catalyst is excited through the light source, PET is promoted to be decomposed into a terephthalic acid diester polymer, then the terephthalic acid diester polymer is further decomposed into small molecules, and no by-product is generated in the whole process. The post-treatment process includes direct filtration to recover the catalyst that can be reused in the degradation process; and cooling and crystallizing the filtrate to obtain a terephthalic acid diester product with the purity of more than 99.9%. The technology is suitable for PET materials with various shapes and sizes, and completely conforms to the current concept of green chemistry and sustainable development.

The present application relates to a kind of catalytic polyethylene terephthalate melt controllable degradation method, belong to the upgrading chemical recycling technical field of waste polyethylene terephthalate.The fragments of polyethylene terephthalate are mixed with catalyst sufficiently, the catalyst is alkaline earth metal hydroxide or alkaline earth metal oxide;The mixture is heated, so that the catalyst degrades polyethylene terephthalate and obtains intermediate product terephthalic acid vinyl ester, after adding water, the terephthalic acid vinyl ester hydrolysis reaction generates terephthalic acid and ethylene glycol, realizes the degradation of polyethylene terephthalate.The present application does not use organic solvent, cost is low, degradation time is short, reaction temperature is low, yield is high, catalyst can be recycled and used again, and the whole reaction is carried out under normal pressure, and nitrogen gas and the like are not needed Protection.

The invention provides a toxicity evaluation method for tetracycline photolysis catalytic products, which is used for performing toxicity evaluation on chronic and acute toxicity of intermediate products generated in the process of catalyzing tetracycline photolysis by a catalyst, and comprises the following steps: constructing a tetracycline geometric structure model according to a foreline molecular orbital theory; based on DFT analysis, ESR analysis and LC-ESI / MS analysis on different sites in a tetracycline geometric structure model, a reasonable degradation path of tetracycline degradation by the catalyst is obtained, and structures of different intermediate products are obtained; aiming at various intermediate products, ECOSAR 2.0 software is adopted to carry out toxicity analysis on fishes, water fleas and green algae, and toxicity results of various intermediate products are obtained through simulation. Intermediate product structures possibly generated in the tetracycline photolysis catalysis process are obtained through simulation analysis, the toxicity of different intermediate products to substances in a water body environment is analyzed, and a comprehensive toxicity analysis result of degradation products in the tetracycline photolysis catalysis process is obtained. And an optimization thought is provided for subsequent water treatment after tetracycline degradation.

The invention relates to the field of waste fan blade recovery, in particular to a wind power blade recovery method with fiber reinforced anhydride cured epoxy resin as a main body. The degradation efficiency of the whole reaction is improved through the swelling reagent, a part of degradation products obtained through catalyst degradation can be added into new resin according to a certain proportion to be cured, the whole cost of the epoxy resin is effectively reduced, the catalyst can be recycled, and the efficiency is not affected. The reaction conditions in the whole recovery process are mild, high-value resources in the leaves are fully recycled, and waste of the resources is avoided. The degradation rate of the catalyst system is high and can reach 95% or above, and the effectiveness of the catalyst is still guaranteed after the catalyst is circulated for five times or above. The mechanical property of the acid anhydride cured epoxy resin obtained by adding the epoxy resin monomer recovered by degrading the waste wind turbine blade into the new monomer according to a certain proportion is not obviously influenced, and the performance requirement of the thermosetting acid anhydride cured epoxy resin is met.

The invention discloses a sewage treatment method for improving the degradation efficiency of a quinonyl catalyst based on electrochemical pulse, and relates to the technical field of water treatment.The sewage treatment method comprises the steps that S1, the CO2 capture potential and the CO2 release potential x of a working electrode modified with the quinonyl catalyst are determined; s2, carrying out electrochemical catalytic degradation, and applying a constant voltage until CO2 generated by electrochemical catalytic degradation is combined with the quinonyl catalyst; s3, then applying a weak electric field pulse voltage until the quinonyl catalyst and CO2 are completely dissociated; s4, S2 and S3 are circulated until degradation of the organic sewage is completed, according to the method, by applying the constant voltage and the pulse voltage capable of forming the weak electric field, catalytic degradation of the organic sewage and dissociation of CO2 through the quinonyl catalyst are achieved, the sewage treatment efficiency and stability of the quinonyl catalyst are remarkably improved, and the time cost of catalytic degradation is reduced.

Compositions, systems, and methods are described to remove per-and polyfluoroalkyl substances (PFAS) from water. The disclosed methods remove PFAS by mixing contaminated water with a enzyme along with a non-toxic metal catalyst, filtering the mixture, and recovering the metal catalyst from the retentate stream. The disclosure includes methods of using the catalyst to improve the reaction performance while minimizing the total catalyst mass needed for treatment. Unlike competing methods, the disclosed method produces little or no residual.