39results about How to "Fast desorption" patented technology

The invention discloses a polyamine cross-linked network structure with high stability and a preparation method and application thereof, the structure takes an inorganic porous material as a carrier, the inorganic porous carrier and polyamine are cross-linked by using a silane coupling agent, and a cross-linking agent is introduced to cross-link polyamine molecules so as to form a solid adsorbent. The adsorbent still has more than 95% of adsorption capacity after 50 times of adsorption cycles, the desorption enthalpy is in the range of 50-80 kJ / mol, the regeneration energy consumption is in the range of 1.5-2.0 GJ / ton-CO2, and the high-stability and low-energy-consumption CO2 trapping characteristic enables the adsorbent to have large-scale application potential.

The invention belongs to the technical field of environmental protection, and discloses a method for rapidly and efficiently removing and recycling polycyclic aromatic hydrocarbon in water and a carbon-based adsorbent, the method comprises the following steps: S1, preparing a modified carbon-based adsorbent; s2, treating the polycyclic aromatic hydrocarbon pollutant wastewater; and S3, recycling the polycyclic aromatic hydrocarbon. According to the preparation method, H3PO4 or ZnCl2 is taken as an activating agent, and an activated carbon base material and an activating process are controlled, so that nano-micron multi-scale modified carbon-based adsorbent particles which are mainly prepared from a large number of long-strip-shaped gap mesopores which are communicated with one another and are approximately distributed in parallel and are auxiliary from a small number of discrete irregular groove-shaped mesopores are obtained; the long and narrow long-strip-shaped gap mesopores of the particle are matched with the irregular groove-shaped mesoporous structure, so that large-size polycyclic aromatic hydrocarbon can be quickly adsorbed and desorbed, and the balance of adsorption and desorption efficiency can be realized; on one hand, the adsorption and desorption efficiency of pollutants is improved, and on the other hand, the dosage of the adsorbent is greatly reduced.

The invention provides a trapping agent for C4 mixed hydrocarbon gas separation, a preparation method of the trapping agent and a C4 mixed hydrocarbon gas separation method. The trapping agent comprises a solid adsorbent and an organic solvent, the solid adsorbent is CALF-20 (Callidol Alkaline The total mass of the trapping agent is 100%, the content of the solid adsorbent is 15wt%-50wt%, and the content of the organic solvent is 50wt%-85wt%; the organic solvent is prepared from one or a combination of more than two of 1, 3-dimethyl-2-imidazolinone, benzyl alcohol and dimethyl phthalate. The trapping agent is excellent in effect, has the advantages of being large in n-butene adsorption capacity, high in n-isobutene / isobutene selectivity, high in adsorption speed, good in regeneration performance and the like, and provides diversified choices for separating C4 mixed hydrocarbon gas through a slurry method in industrial practical application.

The invention relates to the field of high-temperature alloy powder degassing, in particular to an alloy powder degassing device and method. The alloy powder degassing device comprises a vacuum obtaining part, a heating cavity, an alloy powder storage part, a bearing part, a connecting transmission part and a cam mechanism. Wherein a vacuum obtaining port of the heating cavity is connected with the vacuum obtaining component; the bearing component is arranged in the heating cavity; the alloy powder storage part is placed above the bearing part; the lower portion of the bearing component is connected with the cam mechanism through the connecting transmission component. According to the alloy powder degassing device, the harmful gas elements adsorbed on the surface of the alloy powder can be removed under the heating and vacuum conditions aiming at the alloy powder which is large in specific surface area and adsorbs the harmful gas elements on the surface, the content of the harmful gas elements in the alloy powder is reduced, the number of inclusions generated on line in the remelting process of the alloy powder is reduced, and the remelting quality of the alloy powder is improved. The waste powder purification treatment difficulty is reduced.

The invention discloses a supported catalyst with a strong-coupling bimetallic nanoparticle active center, a preparation method of the supported catalyst and application of the supported catalyst in selective dehydrogenation of isopropanol. The preparation method comprises the following steps: mixing a dimethyl sulfoxide solution containing acetylacetone metal salt A and acetylacetone metal salt B with a dimethyl sulfoxide solution containing a carrier powder sample, carrying out ultrasonic treatment to a transparent colloid shape, drying, and roasting to obtain the supported catalyst with the strong coupling bimetallic nanoparticle active center. The prepared catalyst shows excellent catalytic efficiency in the selective dehydrogenation reaction of isopropanol, the yield of acetone in an isopropanol dehydrogenation product can be kept at 90% or above at a wide temperature window (100-200 DEG C), and the acetone generation rate of the catalyst at 200 DEG C is increased by 10.5 times compared with that of a traditional Pd-based catalyst.

The utility model provides a pressurizing jig capable of preventing a lower brightness enhancement film from shifting, which comprises a connecting seat, two through grooves are symmetrically arranged on two sides of the connecting seat, a fixing rod is fixedly connected to the inner wall of each through groove, a sucker component is arranged on one side of each fixing rod, a dustproof plate is slidably arranged in the connecting seat, and the dustproof plate is fixedly connected with the connecting seat. A positioning block is arranged at the top of the connecting base, a fixing bolt is arranged in the positioning block, and an ejector pin is arranged at the bottom of the positioning block. The pressurizing jig capable of preventing the lower brightness enhancement film from shifting solves the problems that when an existing device is actually used, a large gap is formed between a connecting base and the lower brightness enhancement film, the connecting base is prone to shifting in the downward pressing process, and when a plurality of suction cups need to be separated from the lower brightness enhancement film manually after use, operation is inconvenient, and the working efficiency is high. And if the force is too large, the lower brightness enhancement film is possibly separated from the double-faced adhesive tape, and the use effect is not good.

The application provides a kind of propylene propane mixed gas separation trapping agent and its preparation method and propylene propane mixed gas separation method.The trapping agent includes solid adsorbent and organic solvent;The solid adsorbent is CALF-20;With the total mass of the trapping agent as 100%, the content of the solid adsorbent is 5wt%-45wt%, and the content of the organic solvent is 55wt%-95wt%.The MOF slurry trapping agent provided by the application has excellent effect on gas separation, with high propylene adsorption capacity, high propylene / propane selectivity, short equilibrium time, fast desorption speed, high regeneration performance and other advantages.

The application discloses a kind of photo-thermal synergic self-heating carbon capture and in-situ conversion method and device, it is related to flue gas carbon dioxide capture and resource utilization technical field, wherein the method includes: the flue gas containing carbon dioxide is passed into the adsorption tower equipped with core-shell type photo-thermal adsorption catalytic particles, and carbon dioxide is adsorbed by particle core layer at normal temperature;After core layer adsorption saturation, adsorption tower is switched to closed cycle, and the light focusing system is started to focus sunlight, so that shell layer photo-thermal material generates plasmonic resonance effect and forms local high temperature, drives core layer to desorb carbon dioxide;Desorbed carbon dioxide and hydrogen occur hydrogenation reaction on the surface of shell layer catalyst, and in-situ generate liquid formic acid and release reaction heat;Relies on the heat to build self-heating cycle, auxiliary adsorbent is completely regenerated, collects tower bottom liquid formic acid, equipment is switched back to adsorption mode, and complete single-tower complete working cycle.The application realizes carbon dioxide adsorption in-situ conversion by photo-thermal coupling self-heating cycle, and reduces regeneration energy consumption.

The application relates to a micro-micro-mesoporous composite pore system ZSM-5 molecular sieve and a synthesis method and VOCs adsorption application thereof. On the basis of maintaining original micropore structure, a second micropore structure and a mesopore structure are introduced, wherein the original micropore structure can adsorb small molecules such as dichloromethane, the newly introduced second micropore structure can adsorb macromolecules such as m-xylene, the mesopore structure can improve the molecular diffusion rate, reduce the desorption temperature and improve the desorption speed. The application also relates to a preparation method of the material, mainly adopting an inorganic cation or a surfactant-mediated molecular sieve controllable desilication method. The material shows higher adsorption capacity and lower desorption temperature in the adsorption process of VOCs with a relatively wide boiling point distribution.

The present invention provides a Ni-M single-atom alloy catalyst and a preparation method and application thereof. The catalyst is a magnesium-aluminum metal mixed oxide MgAlO X As a carrier, a first metal Ni and a second metal M are loaded, wherein the second metal M is selected from one of the noble metals Pt, Ru, Pd, Rh, Ir, Ag and Au, or one of the non-noble metals Fe, Co, Cu, Zn, Ga, In, Mn, Bi, Cd, Sn. By configuring a mixed metal salt solution of Ni, M, Mg, and Al, a Ni / M / Mg / Al quaternary layered hydroxide material Q is prepared by a coprecipitation method, and then a supported Ni-M single-atom alloy catalyst is obtained by thermal reduction. The catalyst is used in the reaction of selective hydrogenation of 2,6-diamino-3,5-dinitropyridine to prepare 2,3,5,6-tetraaminopyridine, and shows high activity and high selectivity under mild conditions, avoiding the occurrence of side reactions such as excessive hydrogenation under high temperature conditions; it also has the characteristics of good stability, reusability and long life, and has broad prospects in industrial applications.

The present invention discloses a graphene aerogel-based electrostatic adsorption method, which includes three parts: graphene aerogel preparation, active component impregnation and electrostatic adsorption. A quartz tube is used to make an adsorption column, and copper sheets are embedded inside the two ends of the adsorption column and wires are led out to facilitate the connection of electrodes. The preparation of graphene aerogel, active component impregnation and electrostatic adsorption are completed in the same adsorption column. The present invention can achieve 100% space utilization of the adsorption column by placing a graphene film in the adsorption column to foam it into foam and fill the adsorption column. The adsorption tower uses copper sheets embedded inside the two ends and copper wires are led out to achieve the purpose of applying current. Only a small current is needed to make the graphene aerogel reach the desorption temperature in a short time, thereby quickly desorbing.

The utility model discloses a high-efficiency ammonia still, which belongs to the technical field of ammonia separation and comprises an upper seal head, a barrel, a lower seal head and a skirt, the barrel is sequentially provided with a feed distributor a, a tube nest heater, an arc-shaped partition plate, a feed distributor b and filler from top to bottom, the feed distributor a is connected with a feed port, and the lower seal head is connected with the skirt. A top end fixing plate and a bottom end fixing plate are arranged on the upper portion and the lower portion of the tube nest heater, the arc-shaped partition plate is communicated with the vapor phase outlet, the feeding distributor a and the feeding distributor b are identical in structure, the feeding distributor a comprises the top end fixing plate, the bottom end fixing plate, blades and a connecting plate, and the technical problem that existing equipment is high in production cost is solved. The method is mainly applied to ethanolamine production.

The VOCs mobile desorption equipment comprises a bearing and transporting device, the bearing and transporting device comprises a bearing and transporting vehicle head, a bearing and transporting compartment is installed at the left end of the bearing and transporting vehicle head, and an opening and closing turnover door is movably installed on the left end face of the bearing and transporting compartment; the VOCs mobile desorption equipment can be moved as required through the bearing transporter, so that manufacturers can rent the VOCs mobile desorption equipment owned by themselves, the utilization rate can be increased, the use cost can be reduced, the VOCs mobile desorption equipment can quickly generate steam through the quick vaporization mechanism, the energy consumption is lower, the waiting time is shortened, and the efficiency is improved. The VOCs mobile desorption equipment has the advantages that the VOCs mobile desorption equipment can directly inject hot steam into the adsorption tower for desorption work through the steam conveying assembly, desorption work can be carried out without taking out an adsorbent, more time and labor are saved, the use cost can be further reduced, and the practicability of the VOCs mobile desorption equipment is improved.

The present invention relates to a method for efficiently desorbing gold-loaded carbon from gold-containing sulfide ore by carbon leaching, which belongs to the field of gold smelting. The specific steps are as follows: (1) dispersing and desludging the gold-loaded activated carbon obtained in the carbon leaching process, and separating the gold-loaded activated carbon from muddy water by a vibrating screen; (2) transporting the activated carbon obtained in the above step (1) to a circulating conversion column, treating it with a conversion agent, and obtaining calcium carbonate-containing gold-loaded activated carbon, wherein the conversion agent is a mixed solution of sodium carbonate and sodium hydroxide; (3) transporting the gold-loaded activated carbon obtained in the above step (2) to a circulating desorption column, transporting the obtained gold-containing precious liquid to an electrolysis system, and transporting the lean activated carbon to acid washing and decalcification, wherein the desorbent is a mixed solution of sodium carbonate, sodium hydroxide and sodium cyanide. The present invention avoids the normal operation of the gold-loaded activated carbon circulating desorption system by calcium sulfate or calcium hydroxide; at the same time, the difficult-to-desorb calcium auric cyanate is also converted into easily desorbable sodium auric cyanate, thereby improving the gold desorption rate of the gold-loaded activated carbon.

The invention relates to the technical field of chemical catalysts, in particular to a catalyst for preparing 2-tert-butylhydroquinone and a preparation method and application thereof.The catalyst comprises a hierarchical pore H beta molecular sieve, active metal is loaded in a framework of the hierarchical pore H beta molecular sieve, and the active metal is one or more of La, Ce and Zn. The catalyst adopts the hierarchical pore H beta molecular sieve as a skeleton, so that the diffusion limitation of the traditional microporous molecular sieve can be effectively broken through, and the occurrence of side reactions is reduced while the intrinsic rate of the reaction is greatly improved. La, Ce and Zn active metals are introduced into a hierarchical pore H beta molecular sieve framework to form a high-activity catalytic center synergistic system, and the reaction process is enhanced. Compared with the traditional liquid acid catalyst and ion exchange resin, the catalyst has the characteristics of simple process, easiness in recovery, no pollution, good high-temperature stability, high catalytic activity, good selectivity and low cost, and solves the core problems of low activity, heavy pollution and high cost of the traditional catalyst.

The present application relates to polishing robot technical field, especially a kind of parallel electromagnetic adsorption wall-climbing robot for curved surface polishing, including robot shell, electromagnetic adsorption mechanism, adaptive wheel group and 3RSS-U parallel polishing device.Slot is arranged at the cladding plate of robot shell with interval, for installing electromagnetic adsorption mechanism and mackenna wheel group with shock absorber, so that robot can be stably adsorbed and adaptively moved on complex curved surface.3RSS-U parallel polishing device located in the inside of shell, through three evenly distributed series motion branches and a central air bag type cylinder connection fixed platform and movable platform with polishing head, realizes the three-degree-of-freedom precision polishing movement of two rotation one movement, the present application has large range of movement ability, high rigidity operation characteristics and excellent curved surface adaptability, especially suitable for the automatic polishing operation of complex curved surface such as ship, large storage tank etc.

This invention discloses a phase transfer enrichment functional catalyst for the preparation of 3-hydroxypropional from acrolein hydration, its preparation method, and its application, relating to the field of catalyst technology. Using macroporous styrene-based resin as a support, this invention introduces an intermediate containing dichlorinated active sites through a Friedel-Crafts phosphorylation reaction between phosphorus oxychloride and the resin surface. Subsequently, through stepwise esterification and hydrolysis reactions, organophilic long chains and phosphate hydroxyl functional groups are introduced, respectively, constructing a microenvironmental catalytic system with synergistic effects of organophilic side chains and acidic centers, thereby improving the conversion rate and selectivity of the acrolein hydration reaction.

The invention relates to an in-situ growth nickel-cobalt nanosheet electrocatalyst and a preparation method and application thereof.Foam metal is soaked in a mixed solution of nickel salt and cobalt salt, the nickel-cobalt nanosheet array electrocatalyst growing on the foam metal in situ is obtained through reaction, and metal more active than cobalt and nickel is selected as the foam metal. Compared with the prior art, the in-situ growth strategy avoids the use of an adhesive, and the prepared nickel-cobalt nanosheet array structure which grows on the foam iron in situ and is regularly arranged is beneficial to accelerating diffusion mass transfer of a catalytic reaction and accelerating rapid desorption of accumulated bubbles and has a large specific surface area; therefore, active sites are fully exposed, the reaction kinetics is improved, and the catalytic activity and stability can be effectively improved.

The application discloses a catalyst for biomass gasification hydrogen production, a preparation method of the catalyst and a hydrogen production method. The preparation method comprises the following steps: uniformly mixing a doping component A and a doping component B to obtain a material flow I; adding an anionic surfactant and a first precipitator into a calcium salt solution, controlling the pH of the system to be 8-9, and then uniformly mixing at 40-60 DEG C to obtain a material flow II; adding the material flow I, a second precipitator and a third precipitator into the material flow II, uniformly mixing at 70-80 DEG C to obtain a material flow III, and further performing heat treatment to obtain the catalyst. The application also provides the catalyst prepared by the above method and a hydrogen production method by biomass gasification. The application overcomes the densification problem of the adsorption and desorption process of the conventional calcium-based absorbent, and further realizes the double goals of biomass production of high-quality hydrogen and recycling of the calcium-based absorbent through matching of the double fluidized bed process.

The utility model relates to the technical field of filters, in particular to a folding activated carbon filter which comprises a metal outer frame mounted on a main body, L-shaped reinforcing blocks mounted at the corners of the periphery between the metal outer frame and the main body, a metal net mounted between the metal outer frame and the main body, and a connecting frame mounted in the main body, an activated carbon filter layer is mounted on the connecting frame. The activated carbon filter layer arranged in the device has the characteristic of large adsorption capacity, has excellent adsorption capacity on microorganisms and bacteria and particularly excellent adsorption capacity on low-concentration adsorbate, and the activated carbon fiber felt is easy to regenerate and high in desorption speed, so that the activated carbon filter layer is fully utilized, and the service life of the activated carbon filter layer is prolonged. The metal outer frame arranged on the main body of the activated carbon filter is firm and detachable, filter materials are convenient to replace, the purpose of reutilization is achieved, the activated carbon filter layer is of a folding type, the filter area of the filter is increased, the initial resistance is reduced, the ventilation quantity is increased, and then efficient filtering is guaranteed.

The invention discloses a CO2 adsorption trapping method based on coupling of a carbon material polar functional group and an electric field, and belongs to the technical field of CO2 adsorption trapping. The method comprises the following steps: performing polar functional group directional grafting on a carbon-based adsorbent, uniformly mixing with quartz sand, putting into a fixed bed reactor, and regulating and controlling the temperature and pressure of a bed layer to the required temperature and pressure; the method comprises the following steps: introducing industrial flue gas containing CO2 with the concentration of 10-20 vol% into a fixed bed reactor; applying an external electric field to the carbon-based adsorbent after the carbon-based adsorbent adsorbs and gathers CO2 to be saturated; and performing thermal regeneration on the carbon-based adsorbent. By grafting the polar functional group to the carbon-based adsorbent and combining with an external electric field, high-efficiency adsorption and low-energy-consumption regeneration of CO2 are realized, the selectivity and adsorption capacity of the adsorbent to CO2 are improved, and ineffective energy consumption is reduced by guiding energy to be directionally focused on a CO2 enrichment area.

This invention discloses the preparation and application of a porous bismuth ferrite material. The preparation method includes the following steps: dissolving bismuth and iron salts in an acid solution to obtain a metal solution; adding a complexing agent and a pore-forming agent to the metal solution and mixing to obtain a precursor solution; heating the precursor solution to obtain a wet gel; drying the wet gel to obtain a dry gel; and calcining the dry gel under an inert atmosphere containing 6-10% oxygen to obtain the porous bismuth ferrite material. The porous bismuth ferrite electrode material of this invention not only solves the structural defects of traditional porous bismuth ferrite materials, such as small pore volume and insufficient utilization of active sites, but also fully utilizes its membrane capacitance characteristics and bimetallic synergistic effect, showing excellent application prospects in the field of capacitive deionization and chlorine removal.

The invention discloses a high-frequency surface acoustic wave dimethyl methylphosphonate sensor and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor comprises a piezoelectric substrate, an interdigital transducer arranged on the piezoelectric substrate and a gas sensitive layer formed on the surface of the interdigital transducer, the gas sensitive layer comprises a 11-mercaptoundecanoic acid material layer formed on the surface of the interdigital transducer and a zirconium-based MOF material layer formed on the 11-mercaptoundecanoic acid material layer. The invention also provides a preparation method of the sensor. The 11-mercaptoundecanoic acid and the zirconium-based MOF material layer are modified on the surface of a high-frequency surface acoustic wave device layer by layer through a molecular self-assembly technology. The sensor disclosed by the invention has high sensitivity, quick response and good repeatability on dimethyl methylphosphonate gas, is simple in preparation process and good in repeatability, and has important application value in the field of gas sensing.

The invention discloses a preparation method for quickly preparing an efficient hydrogen evolution catalyst on carbon steel. The method is prepared by treating empty carbon steel, preparing an electroplating solution and an electrodeposited catalyst. The preparation method is simple, the process is easy to control, the raw material source is wide, the cost is low, and the preparation cycle is short. In the preparation process, a dynamic hydrogen bubble template method is used to quickly and firmly grow a NiCoFe catalyst on a carbon steel substrate under a large current, which not only enhances the hydrophilicity and gas repellency of the carbon steel, but also improves the double electric layer capacitance of the material, reduces the hydrogen evolution overpotential of the material, and the prepared catalyst particle size is 1 μm, and the morphology is a three-dimensional porous spherical structure, which lays a foundation for its excellent hydrogen evolution catalytic performance. The catalyst prepared by the invention can be mass-produced, has good economic benefits, and is suitable for industrial application.

The invention discloses a porous carbon fiber felt, a fragrance material and fragrance, and belongs to the technical field of fragrance, the average pore size of the porous carbon fiber felt is 1-1.5 nm, the total pore volume is 1-1.2 cm < 3 > / g, the air permeability is less than or equal to 8s, and the surface oxygen group content is 0.6-2.1 wt%; the porous carbon fiber felt is provided with ultra-micropores, the aperture of the ultra-micropores is 0.3-1.2 nm, and the capacity of the ultra-micropores is 0.4-0.5 cm < 3 > / g. The porous carbon fiber felt disclosed by the invention has a rich pore structure and extremely low surface oxygen content groups, is provided with 0.3-1.2 nm ultra-micropores with the capacity of 0.4-0.5 cm < 3 > / g, has excellent hydrophobicity, can slowly and uniformly control the desorption rate of fragrance by utilizing a small-pore confinement effect, effectively controls the slow release effect of perfume and essence, and can be used for preparing the perfume and the essence. The perfume and the essence are released permanently and stably, the service life is effectively prolonged, and the use effect is effectively improved.

The invention discloses a supported catalyst with a sub-nanocluster active center, a preparation method and an application of the supported catalyst in selective dehydrogenation of isopropanol, the preparation method comprises the following steps: uniformly mixing a noble metal precursor solution with a carrier, carrying out rotary evaporation treatment by adopting a step-by-step depressurization vacuum extraction method, then carrying out primary roasting, and carrying out secondary roasting to obtain the supported catalyst with the sub-nanocluster active center. Powder is obtained; performing plasma discharge treatment on the powder under mixed gas of hydrogen and argon to obtain a sample; and carrying out secondary roasting on the sample. The selective activation of C-H bonds of isopropanol molecules and the rapid desorption of acetone reaction intermediates are synergistically realized through the strong coupling effect and the synergistic catalysis effect among metal atoms with uniform coordination structures on sub-nanocluster sites, so that the deep oxidation of the isopropanol molecules is avoided. The catalyst shows excellent catalytic efficiency in an isopropanol selective dehydrogenation reaction, and the yield of acetone in an isopropanol dehydrogenation product can be kept at 90% or above under a wide temperature window (100-200 DEG C).

The invention discloses a transparent photo-thermal driving flexible wet pump material as well as a preparation method and application thereof, and belongs to the technical field of air humidity regulation and energy-saving building materials. The transparent photo-thermal driving flexible wet pump material prepared by the invention is a transparent material, does not block outdoor light from irradiating indoors when being used, and does not influence the lighting capacity of a house; and meanwhile, due to the flexible material, when not in use, the clothes hanger can be rolled up and stored, and does not occupy space. The transparent photo-thermal driving flexible wet pump material prepared by the invention can realize one-way transfer of water from indoor to outdoor, can realize transfer of water from high humidity to low humidity, can also realize transfer of water from low humidity to high humidity, and passively reduces the indoor humidity of a building. According to the transparent photo-thermal driving flexible wet pump material, photo-thermal conversion is conducted through the efficient photo-thermal particles, the temperature of the composite material can be rapidly increased within a short time, and therefore absorbed water can be rapidly desorbed, and zero-energy-consumption regeneration is achieved.

The invention relates to an in-situ growth copper nanosheet electrocatalyst and a preparation method and application thereof.The preparation method comprises the steps that foam metal is soaked in a copper salt solution, the copper nanosheet array electrocatalyst growing on the foam metal in situ is obtained through reaction, and the foam metal is selected from metal more active than copper. Compared with the prior art, the in-situ growth strategy avoids the use of an adhesive, and the prepared copper nanosheet array structure which grows on the foam iron in situ and is regularly arranged is beneficial to accelerating diffusion mass transfer of a catalytic reaction and accelerating rapid desorption of accumulated bubbles and has a large specific surface area, so that active sites are fully exposed; the reaction kinetics is improved, and the catalytic activity and stability can be effectively improved.

The invention belongs to the technical field of coal bed gas development, and discloses a transformation method for increasing the yield of a low-yield coal bed gas well, which comprises the following steps of: firstly, removing blockage through oscillation, discharging blockage removal sewage, then injecting a nano desorption accelerant into a coal bed, closing the well to infiltrate the coal bed, and recovering the production. According to the method disclosed by the invention, negative-pressure oscillation blockage removal and wide infiltration of the nano desorption agent are adopted, so that the flowability of a large-range coal seam crack system is greatly improved, and the desorption speed, the desorption degree, the coal seam gas yield and the coal seam gas recovery rate of the coal seam gas are greatly improved.

The invention belongs to the technical field of catalyst preparation, and particularly discloses a high-catalytic-efficiency non-noble-metal-based bifunctional catalyst and a preparation method and application thereof.The preparation method comprises the following steps that transition metal salt and halogen element salt are dissolved in a mixed reagent of ethyl alcohol and water, the mixed reagent is dropped on a conductive substrate, and the conductive substrate is dried to obtain the high-catalytic-efficiency non-noble-metal-based bifunctional catalyst. The preparation method comprises the following steps: adding a halogen-doped non-noble metal-based bifunctional catalyst into a reaction kettle, carrying out a solvothermal reaction on a heating plate at a heating temperature of 80-120 DEG C for 5-10 h, drying the obtained material, and carrying out plasma treatment to obtain the halogen-doped non-noble metal-based bifunctional catalyst. By adopting the high-catalytic-efficiency non-noble metal-based bifunctional catalyst as well as the preparation method and the application thereof, the problems that most high-efficiency catalysts in the ENRR field in the prior art are composed of noble metals, are high in cost and are not beneficial to industrial treatment of nitrogen-containing wastewater; the problem that a noble metal-based catalyst is easily subjected to S poisoning in an anode SOR and is rapidly inactivated is solved, and the non-noble metal-based bifunctional catalyst with high catalytic efficiency is constructed.