56results about How to "Promote lysis" patented technology

The invention discloses a waste plastic pyrolysis-catalysis system based on electromagnetic induction heating and a catalytic reforming method, and relates to the technical field of plastic pyrolysis. The problems that in the existing plastic pyrolysis-catalysis process, the yield and quality of CNTs and H2 are affected by factors such as non-uniform heating, catalyst deactivation and difficult product separation exist are solved. The system comprises a gas inlet device, a waste plastic pyrolysis device, a waste plastic continuous feeding device, a waste plastic catalytic reforming device and a gas collecting device, the gas inlet device is used for providing argon gas flow for the waste plastic pyrolysis device through a gas pipe; the waste plastic continuous feeding device is used for feeding waste plastic into the waste plastic pyrolysis device for heating and cracking; pyrolysis products enter a waste plastic catalytic reforming device after passing through a waste plastic pyrolysis device; according to the waste plastic catalytic reforming device, the temperature is regulated and controlled through the electromagnetic induction heating module, and the catalytic reforming process is optimized; and gas products after catalytic reforming are collected by a gas collecting device. The method is applied to the field of plastic recovery.

The utility model relates to the technical field of carbon black production equipment, in particular to a combustion process device of a carbon black reaction furnace, which comprises an air distributor, a coal gas distributor, a combustion section, a throat section and a reaction section. A plurality of gas diversion ports are formed in the inner sides of the air distributor and the gas distributor, an axial air deflector is arranged in the air distributor, an axial gas deflector is arranged on the gas distributor, the air deflector and the gas deflector are coaxially arranged, and the diameter of the gas deflector is smaller than that of the air deflector; the throat section is communicated with the rear end of the combustion section, the reaction section is communicated with the throat section, and a trumpet-shaped transition section is arranged at the front end of the reaction section; and two rows of raw oil inlets for radial injection are formed in the throat section. According to the combustion process device of the carbon black reacting furnace, coal gas and air in the hearth can be mixed more uniformly, combustion is more sufficient, and the yield and quality of carbon black can be guaranteed.

The invention provides a sludge fluidized drying device and method, and belongs to the technical field of sludge drying treatment.The device comprises a fluidized heat exchange chamber, a fluidized air bellow and a fluidized air conveying mechanism; the fluidization air box is horizontally arranged at the lower part of a bottom plate of the fluidization heat exchange chamber; a fluidization air inlet is formed in one end of the fluidization air box; the fluidization air conveying mechanism comprises a plurality of fluidization air guide pipes which are uniformly distributed on a top plate of the fluidization air box and fluidization air caps which are arranged at air outlets in the top ends of the fluidization air guide pipes; an air inlet in the bottom end of the fluidization air guide pipe is formed in the fluidization air box; an air outlet in the top end of the fluidization air guide pipe is formed above a bottom plate of the fluidization heat exchange chamber; a plurality of air holes are uniformly distributed in the fluidization air cap along the circumferential direction; orifices of the air holes incline downwards. The problems of high energy consumption, poor heat exchange effect and the like of a method for carrying out heat exchange drying on wet sludge by adopting a heat exchanger in the prior art can be solved.

The invention belongs to the technical field of carbon dioxide capture, and particularly relates to a supported catalyst, a preparation method and application thereof, and an organic amine solution regeneration method. The supported catalyst provided by the invention comprises gamma-Al2O3 and Zr and M metals loaded on the surface and in pore channels of the gamma-Al2O3, and the M metals comprise Fe, Ni, Cu or Ce. According to the supported catalyst provided by the invention, gamma-Al2O3 is taken as a carrier, so that the supported catalyst is endowed with a mesoporous structure, and more effective contact is provided for catalytic active sites and reactants; zr and M metals are used as active components to form the bimetallic supported solid acid catalyst; the synergistic effect of double metals endows the supported catalyst with stronger acidity and higher content of Bronsted and Lewis acid sites. The supported catalyst is used for catalyzing and desorbing the CO2-rich organic amine solution, so that the CO2-rich organic amine solution can be desorbed at a relatively low temperature, and the regeneration cost is reduced.

The invention provides a method for coating graphene through in-situ growth of silica nanoparticles and application of the method, and relates to the technical field of nano material carbon coating modification and graphene growth preparation, the method for coating graphene through in-situ growth of silica nanoparticles comprises the following steps: dissolving a catalyst and melamine in a solvent, and drying to obtain powder A; mixing the powder A with fumed silica nano-powder to obtain powder B; and carrying out chemical vapor deposition reaction on the powder B to grow graphene, so as to obtain the graphene-coated silica nanoparticles. According to the invention, chemical vapor deposition (CVD) is adopted for in-situ growth and coating of graphene on cheap and easily available silica nanoparticles, a catalyst is used for effectively reducing the reaction temperature required by carbon source cracking, and a melamine additive is used for providing gaps among the particles, so that agglomeration, hardening and growth of the silica nanoparticles are avoided.

The invention provides a hair drug detection reagent and a detection device, and belongs to the technical field of drug detection, the reagent comprises a lysis solution and a specific antibody labeling detection reagent; the lysate comprises the following components: a surfactant, a chelating agent, a reducing agent, an enzyme preparation, a stabilizer, a preservative and a buffer solution. The device comprises the reagent. The components of the lysate have a synergistic effect, so that a hair sample can be quickly and effectively lysed, and drugs or metabolites thereof can be released.

The application relates to the technical field of nanomaterial preparation, and particularly discloses a carbon nanotube preparation method based on carbon source and plasma time sequence cooperation and a carbon nanotube. In the gas phase deposition process, carbon source gas is input in a pulse mode, and a pulse type plasma is synchronously applied, wherein the carbon source input pulse and the plasma output pulse are time-differently matched, the carbon source supply window and the plasma action window form a non-fully-synchronized time sequence coupling relationship, the carbon source activation, transportation, deposition and structure reconstruction process are controlled in the time dimension, and meanwhile, the carbon source gas is introduced from a position close to the plasma action area to maintain the pulse opening and closing characteristics. The method can improve the growth selectivity of the carbon nanotube, reduce the defect density, and is suitable for controllable preparation of single-wall carbon nanotubes. The single-wall carbon nanotube with a semiconductor content greater than or equal to 83% can be prepared with high selectivity, and the product has the advantages of few defects, high purity and high yield.

The application discloses a method for preparing biofuel by low-temperature dechlorination of waste PVC and coupling biomass co-pyrolysis, which comprises the following steps: drying, crushing and screening waste PVC, and then performing low-temperature dechlorination in an inert atmosphere, wherein the carrier gas is inert gas, the dechlorination temperature is 340-380 DEG C, the dechlorination time is 20-40 min, and dechlorinated PVC is obtained; crushing and drying the dechlorinated PVC, and then mixing the dechlorinated PVC with biomass at a mass ratio of 0.1-10:1, and then heating and pyrolyzing at 500-700 DEG C for 20-40 min to obtain biofuel. The method achieves good dechlorination effect through step-by-step pyrolysis, and improves the quality of biofuel; the method has a simple process flow, does not need to add any catalyst and adsorbent, and has a good industrial application prospect.

The present application relates to the technical field of food safety, and particularly relates to a low-power water bath ultrasonic foodborne pathogenic bacteria lysis method and application thereof. The present application uses a low-power water bath ultrasonic machine, adds ABS small balls with a size of about 1 mm in a solution sample, uses ultrasonic to cause high-frequency vibration of the ABS small balls, and the local high sound pressure field and high-density cavitation field generated by the vibration can rapidly lyse bacteria. Meanwhile, the movement of the small balls can accelerate the rapid material exchange of the solution at different positions in the tube, so that 1 mL of the to-be-tested bacterial sample can be lysed within 3 minutes. The method provided by the present application has high lysis efficiency and short time consumption. When applied to foodborne pathogenic bacteria detection, nucleic acid purification and enrichment of the lysis liquid are not needed, the time and labor cost required for nucleic acid detection can be greatly shortened, and a new method of efficient, economical and practical bacterial lysis and nucleic acid extraction is provided for the field of food safety detection.

The utility model discloses a catalytic cracking device, which relates to the technical field of petroleum processing and comprises a settling tank, a gas collecting chamber arranged at the exhaust end of the upper end of the settling tank, and a reactor arranged at the lower end of the settling tank and fixedly connected with a regenerated catalyst inclined pipe and one end of a regenerated catalyst guide pipe. The regeneration tank is fixedly connected with the regenerated catalyst inclined pipe and the other end of the regenerated catalyst guide pipe; the lower end of the regeneration tank is fixedly connected with the charring tank; a heating structure is arranged at the bottom of the charring tank, a regeneration structure is arranged in the regeneration tank, a waste gas collecting structure is arranged at the top end of the regeneration tank, the charring tank is heated through the heating structure, the combustion chamber and the outer heating chamber, the internal temperature of the charring tank is increased, and catalytic petroleum cracking of a catalyst is accelerated; through the regeneration structure, coke on the coking catalyst is burnt off by using the first regenerator and the second regenerator so as to recover the activity of the catalyst, and the catalyst is recycled; through a waste gas collecting structure, waste gas generated during catalyst recovery is sucked into a waste gas tank through a waste gas pipe, and environmental pollution is avoided.

The application discloses a kit based on gravity-driven liquid flow, comprising a box body, a liquid storage area and a reaction area arranged from top to bottom in the box body, the liquid storage area comprising a liquid flow channel and a plurality of liquid storage rods arranged on the liquid flow channel, the liquid storage rods storing liquid, the liquid storage rods being provided with liquid flow holes, the liquid storage rods being capable of sliding on the liquid storage area so that the liquid flow holes are communicated with the liquid flow channel, the reaction area comprising a reaction chamber, the reaction chamber being communicated with the liquid flow channel, when the liquid flow holes are communicated with the liquid flow channel, the liquid can flow into the reaction chamber under the action of gravity, the lower end of the reaction area being provided with a waste liquid area and an amplification area, the reaction area being provided with an isolation column at a connecting end of the waste liquid area and the amplification area, the isolation column being provided with a communication hole, the isolation column being capable of sliding on the reaction area so that the communication hole communicates the reaction area with the waste liquid area or the amplification area, so that the liquid in the reaction area flows to the waste liquid area or the amplification area under the action of gravity.

The utility model discloses vapor deposition equipment which comprises a reaction cavity, a gas spraying head arranged on the upper side of the interior of the reaction cavity, a base arranged opposite to the gas spraying head and an ammonia gas cracker, the upper surface of the base is used for bearing a substrate, the ammonia gas cracker comprises a laser transmitter and an ammonia gas input pipeline, and the ammonia gas input pipeline is used for inputting ammonia gas into the reaction cavity. The laser transmitter is arranged above the gas spraying head, and a gas outlet section of the ammonia gas input pipeline is arranged in the gas spraying head; the ammonia gas input pipeline transmits ammonia gas to a laser light path emitted by the laser emitter, the laser irradiates the ammonia gas to promote the cracking reaction of the ammonia gas, and groups generated by cracking of the ammonia gas are diffused to the surface of the substrate and are subjected to deposition reaction with reaction gas on the surface of the substrate; according to the scheme, sufficient ammonia cracking groups still react with the reaction gas at a relatively low heating temperature, so that the heating temperature of the heater is reduced, and the energy consumption is reduced.

The invention relates to the technical field of in-situ mining of shale oil in underground reservoirs, in particular to a system and a method for in-situ mining of shale oil based on an ultrasonic and convection heating method. The system comprises a production well (1), a heat injection well (2), a horizontal well (10), an ultrasonic transducer assembly, a water injection assembly, a steam injection assembly and an oil gas collection assembly. Wherein the water injection assembly is used for injecting water into an oil shale layer (15) through a horizontal well (10) and is also used for cooling the ultrasonic transducer assembly according to a water cooling principle; the ultrasonic transducer assembly is used for transmitting an ultrasonic signal to the water-injected oil shale layer (15) through the horizontal well (10), so that the oil shale layer (15) forms a crack network consisting of cracks; the steam injection assembly is used for injecting steam into the seam net of the oil shale layer (15) and enabling kerogen of the oil shale layer (15) to be pyrolyzed to form oil gas in cooperation with the nonlinear effect of ultrasound; oil gas moves to the floral tube (4) from the seam net and is discharged out of the ground through the production well (1).

The invention belongs to the technical field of water treatment, and particularly relates to a method for efficiently degrading dye in water based on vacuum ultraviolet rays, which comprises the following steps: adding a dye-containing sample water body into a sample container of a photoreaction device, and starting a magnetic stirrer to uniformly mix liquid in the sample container under the action of rapid rotation of a magnetic stirring rotor; adding a persulfate reagent into the sample container to obtain a reaction solution; opening the peristaltic pump, pumping the reaction solution in the sample container into the high-purity quartz annular reaction layer under the action of the peristaltic pump, and reacting under the irradiation of vacuum ultraviolet rays to degrade the dye in the reaction solution.

This invention provides a method for increasing the content of benzene and naphthalene compounds in coal pyrolysis tar. The method includes: reacting low-rank coal pyrolysis volatiles sequentially through a carbon-based catalyst layer and a molecular sieve catalyst layer at a temperature of 500-800℃ under a protective gas atmosphere; the reaction products are then condensed to obtain tar. This method utilizes a series of carbon-based and molecular sieve catalysts for the catalytic cracking of low-rank coal pyrolysis volatiles, fully leveraging the abundant active sites of the carbon-based catalyst and the high selectivity of the molecular sieve. Through the synergistic effect of the carbon-based and molecular sieve catalysts, a significant increase in the content of benzene and naphthalene compounds in the tar obtained from coal pyrolysis is achieved.

The utility model relates to the technical field of reduction cleavage, specifically disclose a kind of reduction cleavage device for detecting forbidden azo dye of textile, including cylinder, the upper surface of cylinder is fixedly connected with multiple support rods, the top of multiple support rods is fixedly connected with round plate, the upper surface of round plate is fixedly connected with multiple tripods, the inner wall of tripod is equipped with the drive mechanism that container is lifted, the inside of cylinder is equipped with the dispersion mechanism that the fixed particles in the bottom of container are dispersed, the dispersion mechanism is set, booster pump supplies water to spray head by second connecting pipe, the water flow that spray head sprays can form impact to the fixed particles, such as catalyst, adsorbent, that the bottom of reaction container deposits, it is dispersed and suspended in reaction liquid, avoid that particle deposits due to gravity and hardly contact with reaction liquid sufficiently, let azo dye cleave well, reduce the detection false negative or numerical deviation caused by insufficient reaction, improve detection accuracy.

The present invention belongs to the field of environmental protection, and in particular, relates to a waste gas treatment device and its application. The waste gas treatment device provided by the present invention includes: a waste gas treatment channel; the waste gas treatment channel has a plurality of plasma injection holes along the two side walls opposite to its axis perpendicular to the direction of waste gas movement, and the positions of the plasma injection holes on the two side walls are symmetrical to each other; each of the plasma injection holes is provided with a semi-circular tube baffle at the gas outlet end; the diameter of the semi-circular tube baffle is larger than the aperture of the plasma injection hole; an injection-type low-temperature plasma generator connected to the gas inlet end of the plasma injection hole; and a catalyst layer arranged in the waste gas treatment channel; along the direction of waste gas movement, the catalyst layer is located downstream of the plasma injection hole. The waste gas treatment equipment provided by the present invention has high degradation rate, good stability, high plasma utilization rate, and excellent mixing effect, and has a very broad market prospect.

The present invention belongs to the field of enzymatic hydrolysis technology. The present invention provides a meat enzymatic hydrolysis pet food process containing XN2 to measure the oxidation activity of controlled-release substances, including the process of selecting a certain amount of supernatant to add a certain amount of phosphatidylcholine and stirring evenly for testing, and measuring and controlling the enzymatic hydrolysis process according to the recovery rate of the filtrate and the change in the viscosity value of the controlled-release substance in the enzymatic hydrolysis process. The present invention at least has the functions of improving the cleavage of hydrophobic groups, preventing corruption, assisting in optimizing the anti-infection and digestion of pet food, improving the rapid development effect, and regulating enzymatic hydrolysis and measuring controlled-release substances. The pet food of the present invention has a multiple acceleration of the growth and development of pets compared with ordinary pet food, and the method of the present invention has strong applicability and good scalability.

The application provides a method for synchronously preparing a metallurgical dephosphorizing agent by gasifying flue gas of a calcium-based reinforced metallurgical furnace and desulfurizing flue gas, and belongs to the technical field of metallurgical energy-saving and environmental protection. The method uniformly loads calcium-based materials on coal gasification raw materials through pretreatment loading, sprays the calcium-based materials into a metallurgical furnace gasification flue through a spraying system on the metallurgical furnace gasification flue, realizes coal gasification under the action of high-temperature flue gas, and the loaded calcium-based materials play a role in strengthening organic fuel cracking gasification in the process. Meanwhile, sulfur-containing flue gas released by the organic fuel is solidified by the calcium-based materials, the solidification products enter a dust removal system with dust, the calcium-based materials react with iron-containing components in the dust in the metallurgical furnace gasification flue to generate calcium ferrite with dephosphorizing metallurgical performance, and the calcium ferrite enters the dust removal system with the dust. The collected dust removal ash is used for high-value dephosphorizing agent production after being separated and purified through magnetic separation, and provides an effective way for the sustainability and economical production of the metallurgical industry.

The application relates to a method for improving the performance of lithium batteries by in-situ growth of carbon nanofibers on a silicon-carbon negative electrode through plasma induction, and belongs to the technical field of new materials and functional materials. The silicon-carbon negative electrode material is subjected to surface activation through plasma pretreatment technology, and then carbon nanofibers are in-situ grown through chemical vapor deposition to construct a three-dimensional conductive network structure. The plasma-assisted chemical vapor deposition technology is adopted, the silicon-carbon surface activated by plasma is used as a substrate, and in-situ growth is carried out to obtain uniformly distributed carbon nanofibers, so that a three-dimensional conductive composite structure closely combined with silicon-carbon particles is formed, and the high-rate cycle stability of the lithium ion battery is effectively improved.

The invention discloses a preparation method and application of a magnetic composite transition bimetallic oxide catalyst, and belongs to the technical field of transition bimetallic oxide catalysis, the chemical formula is CoxNi (1-x) Fe2O4, and x is 0.05-0.25. A cobalt salt, a nickel salt and an iron salt are used as raw materials, a strong reducing agent is added, and a one-pot hydrothermal crystallization method is adopted. The composite transition bimetal oxide catalyst provided by the invention is simple in preparation method, short in production period and relatively strong in inherent magnetism, and can be accurately separated by virtue of an external magnetic field after being used, so that the recovery and reutilization of the catalyst are realized; the problems that metal active components are easy to lose, and the catalyst is easy to deactivate due to carbon deposition and is difficult to recover in the using process of a metal supported catalyst are thoroughly solved. The gt can be efficiently and selectively cracked when the gt is applied to a relevant model compound of lignite and a catalytic hydrogenation conversion process of Dongming lignite in Inner Mongolia; c to Clt; and a heteroatom gt; c-X bridged bonds (X = O, N, S and the like), so that the purpose of converting the low-metamorphic coal into the aromatic hydrocarbon at high yield is achieved.

The application provides a kind of preparation of red radish protoplast enzymatic hydrolysate and the preparation method and application of red radish protoplast, belong to the technical field of plant cytology.The enzymatic hydrolysate includes:1.0~1.5w / v% cellulase, 0.3~0.5w / v% dissociation enzyme and 0.3~0.5w / v% hemicellulase.The cellulase has the effect of degrading cellulose in plant cell wall, dissociation enzyme is used with cellulase, which is beneficial to separate plant tissue into single cell, and the main effect of hemicellulase is to degrade hemicellulose in plant cell wall.The enzymatic hydrolysate can synergistically promote the effect of red radish tissue cell wall lysis through the comprehensive effect of three enzymes, can better and faster destroy cell wall skeleton, is more conducive to the preparation of red radish protoplast and further maximally release protoplast, is conducive to improving the yield of protoplast, and can also keep the protoplast with high activity.

The application belongs to the technical field of polylactic acid production, and particularly relates to a polylactic acid intermediate reaction-separation integrated device and a reaction-separation process. The polylactic acid intermediate reaction-separation integrated device comprises a reaction tower, the reaction tower comprises a packing tower body and a plate tower body integrated together, the reaction tower is provided with a lactic acid oligomer feeding port, a tower top light component discharge port, a tower bottom heavy component discharge port and a lactide intermediate discharge port, the tower bottom heavy component discharge port is used for being communicated with a lactic acid oligomer storage system, the reaction tower is further provided with a heat exchanger, and the tower top light component discharge port is connected with a tower top condenser; the plate tower body is provided with a feeding distributor and at least two layers of staggered tower plates arranged in an upper and lower interval, and each layer of tower plate is provided with a heating pipe. The lactic acid oligomer cracking and the lactide purification are integrated in one reaction tower, two processes are combined into one process, the process flow is shortened, and the further polymerization of lactic acid oligomer and the generation of side reactions are reduced.

The invention provides a heavy oil modification catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method comprises the following steps: preparing magnetic ferroferric oxide nanocrystals, modifying the surfaces of the magnetic ferroferric oxide nanocrystals by using an epoxy silane coupling agent, coupling the modified magnetic ferroferric oxide nanocrystals with bis-salicylaldehyde-triethylamine Schiff base, complexing nickel and iron ions, and coating oleic acid on the surfaces of the modified magnetic ferroferric oxide nanocrystals to prepare the heavy oil modification catalyst. The heavy oil modification catalyst prepared by the invention has better hydrothermal decomposition performance and cycle durability, promotes degradation of heavy oil, promotes depolymerization of asphaltene aggregate, and finally reduces the content of colloid and asphaltene, so that the viscosity of the heavy oil is well reduced, and the heavy oil modification catalyst has a wide application prospect.

The present invention relates to the technical field of mixing and stirring, and specifically to a polypropylene mixing and stirring tank, comprising: a bracket, a top cover is slidably mounted on the upper end of the bracket, a tank body is fixedly mounted on the inner bottom end of the bracket, the top cover is airtightly slidably connected to the upper end of the tank body, a material discharge cover is slidably mounted on the lower end surface of the bracket, and a material discharge barrel is fixedly mounted on the upper end surface of the top cover. The present invention sets a detection element, and in the process of stirring the upper, middle and lower layers of the material in the tank body by the stirring blade, the viscosity of the material will hinder the rotation of the stirring blade, thereby driving the stirring blade and the rotating ring to rotate on the connecting ring, and in the process of the rotating ring rotating, the rotating ring will drive the detection rod to rotate at the detection end of the detection element, so that the detection element detects that when the transmission rod is rotating, the rotating ring rotates on the connecting ring due to the excessive viscosity of the material, thereby determining that the viscosity of the material is too high.

The utility model belongs to the technical field of biomass gasification, and discloses a novel clean fuel gas biomass fixed bed gasification furnace which comprises an outer reaction furnace and an inner reaction furnace, the inner reaction furnace is coaxially arranged in the outer reaction furnace, the bottom of the inner reaction furnace and the inner bottom of the outer reaction furnace are arranged at intervals, and a fuel gas generation area is arranged in the inner reaction furnace. The top of the inner reaction furnace extends to the outside of the outer reaction furnace, a furnace bar is fixed in the inner reaction furnace, the outer peripheral wall of the inner reaction furnace and the inner peripheral wall of the outer reaction furnace are spaced to form a gas purification area, and a gas outlet is formed in the side wall of the top end of the outer reaction furnace; a feeding mechanism is arranged above the inner reaction furnace; a bottom opening of the gas purification area is provided with a filtering mechanism; a cooling mechanism is fixed on the outer side wall, corresponding to the fuel gas purification area, of the inner reaction furnace; an ash removal mechanism is mounted at the bottom in the outer reaction furnace, and an ash inlet end of the ash removal mechanism axially corresponds to an opening in the bottom end of the inner reaction furnace. According to the reaction furnace, the temperature is kept stable by absorbing reaction heat, the gasification efficiency is improved, and the purification effect of fuel gas is improved.

This invention discloses a green and efficient pretreatment method for biomass and its application in the selective preparation of 2,3-dihydrobenzofuran. The pretreatment includes: uniformly mixing biomass raw materials with a ternary eutectic solvent, reacting the mixture in a microwave synthesizer, and then washing, filtering, and drying the reactants to collect the solid residue, thus obtaining the pretreated biomass. The ternary eutectic solvent used in this invention is a mixed solution of zinc chloride, ethylene glycol, and water. It is simple to prepare, uses readily available and harmless raw materials, and is recyclable. Zinc has the dual functions of solvent and catalyst, increasing the total number of hydrogen bonds, promoting the breaking of β-O-4 bonds, and increasing the acidity of the solvent. It also forms metal ion complexes with water ligands, promoting biomass pyrolysis. The pretreatment method of this invention can achieve a lignin removal rate of over 80% at low temperatures, requires a short reaction time, uses readily available and harmless solvents, and exhibits a selectivity for 2,3-dihydrobenzofuran exceeding 40% after pyrolysis, providing technical support for advancing industrialization.

The invention discloses a method for preparing high-quality hydrogen by vacuum degree induced methane cracking, which comprises the following steps: 1) in a module methane decomposition reactor, performing methane cracking on a transition metal-carrier catalyst under carrier gas containing CH4 to generate H2 and a carbon-transition metal carrier mixture; 2) decarbonizing the carbon-transition metal carrier mixture in the presence of a gasifying agent to obtain a transition metal-carrier and CO decarbonized gas; high-temperature CO at an outlet is used for preheating CO2 at an inlet through a heat exchanger, so that heat can be utilized for many times; and circulating the decarbonized transition metal-carrier to the step (1), and circulating the steps to realize large-scale continuous cracking of methane to produce hydrogen. According to the invention, redundant CO2 is converted into valuable CO or a mixture of CO2 and CO. When pure CO2 is used as a raw material, carbon elements in the CO2 can be stored in the form of high-concentration CO through a reduction process; and efficient separation of the catalyst and carbon is realized through carbon gasification.

The invention discloses a diatomic nano-catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts.According to the diatomic nano-catalyst, a hexagonal boron nitride material obtained after ball milling serves as a carrier, Co and Cu are loaded on the carrier, the active ingredient is of a CoCu heterojunction structure and is of a core-shell structure, and the nano-particle size is about 10 nm; the apparent activation energy of the catalyst is 23.0 kJ mol < 1 >, the catalyst shows excellent catalytic performance in the aspect of hydrogen production through hydrolysis of ammonia borane, the catalytic performance can reach 28.8 mol H < 2 >. Mol <-1 > metal talmin < 1 >, and compared with a monatomic catalyst Co (at) BN, the performance of the catalyst is improved by nearly 100%, and compared with a monatomic catalyst Cu (at) BN, the performance of the catalyst is improved by 14 times. The catalyst is low in cost and easy to prepare, raw materials are easy to obtain, the diatomic catalyst with the heterojunction structure has universality, and a feasible strategy is provided for designing a high-performance catalyst.

The invention belongs to the technical field of waste printed circuit board recycling, and particularly discloses a method for recycling a waste printed circuit board through in-situ pyrolysis-ectopic catalysis. The method comprises the following steps: removing components from the waste printed circuit board to prepare waste printed circuit board resin powder; mixing the waste printed circuit board resin powder with iron oxide to obtain a resin mixture; placing the resin mixture in a first pyrolyzing furnace, and pyrolyzing; and finally, introducing the pyrolyzed product into a second pyrolyzing furnace filled with a catalyst, carrying out a thermocatalytic reaction, and cooling to obtain the recycled pyrolytic oil. According to the recycling process, the combustion heat value of the waste printed circuit board resin powder pyrolytic oil is increased, heavy components in the pyrolytic oil are reduced, and therefore the purpose of recycling the high-heat-value light oil is achieved; the calorific value of the pyrolytic oil exceeds 30 MJ / kg, and the content of light components reaches 50% or above.