214results about How to "Facilitate desorption" patented technology

The invention discloses a CO2 trapping absorbent which comprises 20%-50% of proton type ionic liquid, 20%-50% of a phase conversion driving agent and 20%-40% of water, and the phase inversion driving agent is one or a mixture of more of N, N-dimethyl formamide, N-methyl pyrrolidone, pentamethyldiethylenetriamine, tetramethylethylenediamine, tetramethylethylenediamine, tetramethylenediamine, tetramethylethylenediamine and dimethyl piperazine, and the phase inversion driving agent is one or a mixture of more of N, N-dimethyl formamide, N-methyl pyrrolidone, pentamethyldiethylenetriamine, tetramethylethylenediamine, tetramethylethylenediamine and dimethyl piperazine. The absorbent disclosed by the invention has the outstanding advantages of low viscosity, high absorption rate, high regeneration efficiency, high circulation capacity and low regeneration energy consumption, and has a good application prospect.

The invention discloses an ultrasonic excitation and acid fracturing integrated permeability-increasing coal seam enhanced extraction system which comprises an ultrasonic excitation and acid fracturing integrated drilling and feeding device, an ultrasonic control box and a liquid mixing box, and further discloses an ultrasonic excitation and acid fracturing integrated permeability-increasing coal seam enhanced extraction method. Comprising the following steps: S1, collecting a sample in a coal seam; s2, four extraction drill holes with unequal distances are constructed in the coal seam; s3, gas concentration detection is conducted on the extraction drill hole; s4, an ultrasonic transducer is started, and a fracturing pump is started for fracturing; the ultrasonic transducer is started again; s5, after the step S4 is repeated five times, the fracturing pump is closed, and then the ultrasonic transducer is started; and S6, gas concentration detection is conducted on all the extraction drill holes. The method has the advantages that ultrasonic excitation and the acid fracturing effect are mutually coupled, the pore structure of the coal body is improved, the connectivity of pore fractures is improved, gas desorption is promoted, and the coal seam gas extraction efficiency is improved.

The invention relates to the technical field of catalysts for gas purification, in particular to a hierarchical pore metal-based catalytic adsorbent as well as a preparation method and application thereof. The invention discloses an integrated preparation method combining a sol-gel method and a template method, which comprises the following steps of: adding a template agent before forming gel, adding a proper amount of ammonia water in an aging process, accurately controlling other reaction conditions and a raw material ratio, and controlling a spatial confinement effect of the template method and a chemical reaction in a sol-gel process to obtain a sol-gel composite material. The morphology and size of the catalytic adsorbent can be accurately regulated and controlled, the hierarchical pore metal-based catalytic adsorbent with a microporous structure as a main material and mesopores and macropores as coexistence is finally prepared, the hierarchical pore structure provides rich adsorption sites and catalytic activity centers, and the hierarchical pore metal-based catalytic adsorbent has high adsorption capacity, high selectivity, good catalytic activity, good stability and easy regeneration.

The invention provides a preparation method and application of magnesium L-threonate, and belongs to the technical field of medicines. The preparation method comprises the following steps: dissolving L-ascorbic acid in water, adding magnesium hydroxide and alkaline magnesium carbonate, stirring, dropwise adding hydrogen peroxide, heating, stirring and reacting, filtering a product, purifying and concentrating by temperature-sensitive molecularly imprinted hydrogel while the product is hot, adding an ethanol water solution into a concentrated solution, standing, crystallizing, filtering, washing and drying to obtain the magnesium L-threonate. And cooling the temperature-sensitive molecularly imprinted hydrogel after adsorption to room temperature, washing and repeatedly using the temperature-sensitive molecularly imprinted hydrogel. The magnesium L-threonate is simple in preparation method, high in purity and high in yield, meanwhile, the slow-release magnesium L-threonate is prepared, and the magnesium L-threonate is low in toxicity, good in biocompatibility, large in drug loading capacity, low in economic cost and good in drug effect and has wide application prospects in preparation of anti-depression drugs.

The invention discloses a method for leaching rare earth elements in neodymium iron boron waste through synergistic reinforcement of sulfating roasting and a surfactant, and belongs to the technical field of rare earth recovery. The method comprises the following steps: mixing neodymium iron boron waste and concentrated sulfuric acid to prepare a roasting raw material; carrying out roasting treatment on the roasted raw material to obtain a roasted product; the roasted product and a leaching agent are mixed and then leached and filtered, filter residues and filtrate are prepared, and the filtrate is directly used for separation of rare earth elements leached from the neodymium iron boron waste; the leaching agent at least comprises two surfactants. According to the method provided by the invention, multiple surfactants are compounded and cooperate with the sulfating roasting process, so that the leaching rate of the rare earth can be effectively improved, the acid consumption can be reduced, and the purpose of improving the recovery purity of the rare earth element can be achieved; in addition, the compound surfactant is simple in preparation method and convenient to use, and the neodymium iron boron waste recovery cost is reduced to a large extent.

A method for improving the release efficiency of bubbles on the surface of an electrode in high-current water electrolysis hydrogen production belongs to the technical field of hydrogen energy production, and the specific scheme comprises the following steps: step 1, applying pulse voltage to a proton exchange membrane electrolytic cell for water electrolysis hydrogen production, the applied pulse current being 0.5-2A, and the applied pulse voltage being 1.4-1.6 V; and 2, conveying the electrolyte deionized water to an anode chamber of the proton exchange membrane electrolytic cell so as to initiate an oxidation reaction to prepare hydrogen. According to the pulse dynamic electrolysis technology, the PEMWE high-current hydrogen production performance can be improved by adjusting the power supply mode of the power source. Besides, the voltage during the pulse interval period is zero, and the total energy consumption actually only comprises the electric energy consumption within the pulse voltage applying time, so that the pulse dynamic electrolysis technology has more advantages from the energy consumption perspective. The pulse dynamic electrolysis technology is expected to promote bubble release and relieve the polarization phenomenon in PEMWE high-current hydrogen production, and the hydrogen production efficiency and the energy utilization rate of the system are improved.

The invention discloses a heat transfer enhanced high-stability noble metal catalytic oxidation dehydrogenation multilayer core-shell catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst sequentially comprises an aluminum oxide carrier inner core, a defect anchoring layer, a noble metal layer and a protective shell layer from inside to outside, wherein the alumina carrier is particles prepared by mixing active gamma-Al2O3 and a coated high-heat-conductivity-coefficient material, and the defect anchoring layer is composed of oxides having strong interaction with metal; the precious metal layer is composed of precious metal element Pd, and the protective shell layer is made of porous SiO2. The invention also discloses a preparation method of the catalyst and application of the catalyst in dehydrogenation of mixed gas. According to the invention, low-temperature high-efficiency activation of hydrogen can be realized, the dehydrogenation precision of the dehydrogenation catalyst under an industrial operation condition is improved, poisoning and sintering inactivation of H2O to active sites of the dehydrogenation catalyst are inhibited, and the hydrothermal stability is improved. The catalyst is longer in service life and has a wide application prospect.

The invention discloses preparation of a layered mesoporous Pd-Cu nano-catalyst and a method for preparing glycollic acid from PET hydrolysate through electro-oxidation under environmental conditions, and belongs to the technical field of catalysts. The preparation method comprises the following steps: dissolving CTAB (Cetyltrimethyl Ammonium Bromide) serving as a surfactant in a cosolvent of water and TMB (Tetramethylbenzidine), sequentially adding NH4PdCl4 and Cu (NO3) 2.3 H2O serving as metal precursors into a reaction solution, and finally synthesizing the layered mesoporous Pd-Cu by virtue of a reduction effect of sodium borohydride and an in-situ nucleation and adhesion method. Continuous electro-catalysis is carried out in a pulse mode, selective desorption of GA is dynamically accelerated, and new active sites of a metal catalyst are exposed. The electric pulse catalysis can promote the desorption of the product, prevent poisoning, and further improve the stability and selectivity of the catalyst. The method shows excellent glycollic acid Faraday efficiency, high generation rate and excellent cycle stability under a wide potential window, 20 times of electro-catalysis PET upgrading cycles are achieved, and upgrading utilization of PET waste and efficient generation of glycollic acid are achieved.

The invention relates to a salt lake lithium extraction titanium adsorption material and a preparation method thereof, and relates to the technical field of adsorption materials.The preparation method of the salt lake lithium extraction titanium adsorption material comprises the following steps that a titanium source and a lithium source are mixed and then subjected to first magnetic field sintering, and a first precursor is obtained; performing second magnetic field sintering on the first precursor to obtain a second precursor; performing third magnetic field sintering on the second precursor to obtain a third precursor; adding the third precursor into an acid solution for acidification, and then filtering and drying to obtain the titanium adsorption material for extracting lithium from the salt lake. According to the method, a three-section magnetic field sintering mode is adopted, the lithium element adsorption capacity and desorption rate of the obtained titanium system adsorption material are remarkably improved by controlling condition parameters of all stages, the efficient and stable titanium system adsorption material is provided for the field of salt lake lithium extraction, and the defects in the prior art are overcome.

The invention discloses an alkali polishing additive for rapid polishing of monocrystalline silicon and a use method of the alkali polishing additive, and relates to the technical field of monocrystalline silicon etching, and the alkali polishing additive comprises the following components: a reaction accelerator, a corrosion and scale inhibitor, a PH regulator, a defoaming agent, 1, 3-bis (2-hydroxyethyl)-2-imidazolinone, 2, 5-furandimethanol, quinoline yellow, sodium glycyrrhizinate, melamine, hydroxypropyl chitosan and deionized water. The additive is good in alkali polishing effect under low weight loss, high in efficiency, good in stability, good in polished surface appearance and obvious in gain effect on the light conversion efficiency of the solar cell.

The invention provides a nano-porous Co3Ti / Co composite electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: cleaning high-purity Co and Ti metal sheets, corroding oxides on the surfaces of Al metal sheets, then placing the Co, Ti and Al metal sheets in an electric arc furnace for melting to obtain alloy ingots, then preparing small alloy ingots through a directional solidification technology, and carrying out corrosion treatment on the alloy ingots to finally obtain the nano-porous Co3Ti / Co composite electrode. According to the electrode, a Co3Ti / Co intermetallic compound is seamlessly integrated on a Co ligament with a dual-mode pore structure (large pores are about 200nm, and small pores are about 3nm), so that the specific surface area of an electrode material is effectively increased, and the mass transfer and electron transport capabilities of an electrolyte are improved. Meanwhile, Co and Ti sites in the intermetallic compound are beneficial to adsorption of H and OH intermediates respectively, so that water dissociation and * H adsorption / desorption processes are promoted, alkaline hydrogen evolution reaction kinetics is remarkably enhanced, and an efficient electrode material is provided for hydrogen production application.

The invention discloses a three-sludge treatment agent and a preparation method thereof, and belongs to the technical field of oily sludge treatment, the three-sludge treatment agent comprises a treatment agent A and a treatment agent B. The treatment agent B comprises the following raw materials by mass: 30-40 parts of polyacrylamide, 8-10 parts of modified attapulgite clay, 5-6 parts of a compound, and 40-55 parts of deionized water. The modified attapulgite clay is strongly combined with protective films at oil-water and oil-sludge interfaces in the oil sludge through electrostatic force, hydrogen bonds and hydrophobic interaction, the protective films at the oil-water and oil-sludge interfaces are destroyed, oil drops are released and coalesced to form an oil phase, and separation of oil, water and sludge is achieved; positive charges carried in the modified attapulgite clay can be adsorbed to the surfaces of sludge particles with negative charges to be settled and separated out; carboxyl groups contained in the modified hemicellulose can be combined with hydrophilic groups of sophorolipid to form stable mixed micelles, so that the situation that the sophorolipid is easily influenced by the environment to lose efficacy, and oil drops are regathered and precipitated is avoided.

The invention discloses a method for increasing the yield of coal seam gas through cooperation of water jet slotting and hot flue gas displacement, which comprises the following steps: firstly, drilling in a low-permeability coal seam to form a slotting gas injection drill hole and an extraction drill hole, and performing high-pressure hydraulic slotting on the slotting gas injection drill hole to form an annular slotting groove; then a gas injection pipe and an extraction pipe are arranged in the slotted gas injection drill hole and the extraction drill hole correspondingly, and hole sealing operation is completed; the method comprises the following steps: firstly, extracting free gas in the slotted gas injection drill hole, then injecting hot flue gas into the slotted gas injection drill hole, and promoting desorption and flow of gas in coal body hole fractures by utilizing high temperature property and displacement property of the hot flue gas to form a new gas migration channel. And finally, the desorbed gas is subjected to secondary extraction in the extraction drill hole. Water jet slotting and hot flue gas displacement are combined, the breathability of the coal seam is preliminarily improved through high-pressure water jet by means of hydraulic slotting, generation of new pores is promoted through hot flue gas injection, gas is driven to flow out, a large amount of CO2 is sealed in the coal seam, and the gas extraction efficiency of the coal seam difficult to extract is improved.

The invention discloses a hydrophobic additive and a use method thereof, and belongs to the technical field of hydrophobic additive preparation. The hydrophobic additive is prepared from the following components in parts by weight: 7-10 parts of an effective component A, 1-3 parts of an effective component B, 0.1-0.4 part of a solubilizer and 32-46 parts of a solvent, the effective component A is prepared from ethyltriethoxysilane, triisopropanolamine, acrylic acid, methyl methacrylate and trifluoroethyl methacrylate, and the effective component B is prepared from ethyltriethoxysilane, triisopropanolamine, acrylic acid, methyl methacrylate and trifluoroethyl methacrylate. The effective component B is prepared from 2-perfluorohexyl bromoethane, dimethylaminoethyl methacrylate, poly (ethylene glycol) methacrylate and 2-methyl-2-[(dodecylthio-carbonyl) sulfur] propionic acid; and the effective component B is prepared from 2-perfluorohexyl bromoethane, dimethylaminoethyl methacrylate, poly (ethylene glycol) methacrylate and 2-methyl-2-[(dodecylthio-carbonyl) sulfur] propionic acid. The hydrophobic additive is added into the slow pulling process, so that the yield of the silicon wafer can be effectively improved, and the highest yield can reach 99.21%.

The invention provides an acoustic compatibilization material, a preparation method thereof, a loudspeaker module and electronic equipment. The acoustic compatibilization material comprises a living carrier and a porous material, the living carrier has a pore structure, and the pore structure comprises mesopores and macropores; the porous material is loaded or embedded in the pore structure of the living carrier; the porous material is provided with # imgabs0 two-dimensional pore channels and / or three-dimensional pore channels, and the pore channels are communicated with one another. The invention also provides a preparation method of the acoustic compatibilization material, which comprises the following steps: immersing the living carrier in a solution of a porous material precursor, and crystallizing to obtain the acoustic compatibilization material, the preparation method does not comprise a roasting step. The invention further provides a loudspeaker module which comprises the acoustic compatibilization material. The invention further provides an electronic device. The electronic device comprises the loudspeaker module. The acoustic compatibilization material provided by the invention has a hierarchical pore structure, has a relatively good acoustic compatibilization effect, and can effectively improve the low-frequency effect of a loudspeaker.

The invention provides a spinel oxide catalyst as well as a preparation method and application thereof. According to the present invention, the spinel oxide catalyst has the hollow nano-tubular structure, and comprises NiCo2O4 particles, and the specific surface area of the catalyst is large by means of the hollow nano-tubular structure, such that more reaction active sites are provided, and electrolyte diffusion and gas desorption during the water electrolysis oxygen evolution process are easily achieved. Through research, the spinel oxide catalyst has excellent OER electrocatalytic activity. Meanwhile, the catalyst also has relatively small charge transfer resistance, good reaction kinetics and cycling stability.

The invention belongs to the technical field of extraction of lithium from oilfield brine, and discloses a purification method and system for extraction of lithium from oilfield brine and high-impurity lithium-rich liquid. The purification method comprises the following steps: step 1, adding a sodium hydroxide solution into the high-impurity lithium-rich liquid to adjust the pH value, then adding a sodium carbonate solution, carrying out stirring reaction, and carrying out plate-frame pressure filtration to obtain filter residues and filtrate; step 2, performing ceramic ultrafiltration on the filtrate to obtain produced water and concentrated water, and returning the concentrated water to the step 1 to participate in the stirring reaction again; and step 3, regulating the pH value of the produced water with hydrochloric acid, using the regulated produced water as an adsorption stock solution, and adsorbing and desorbing the adsorption stock solution with an aluminum adsorbent to obtain a purified lithium-rich solution. According to the method, aiming at the situation that a large amount of divalent metal ion impurities such as calcium and manganese are contained in the oil field brine lithium extraction lithium-rich liquid, after preliminary impurity removal is carried out through chemical precipitation, deep impurity removal is carried out in combination with ceramic ultrafiltration and the aluminum adsorbent, the service life of the ceramic ultrafiltration and the aluminum adsorbent can be effectively prolonged, and the recycling of ceramic ultrafiltration concentrated water can also improve the yield of lithium ions.

The invention provides a supported FeCo alloy bimetallic catalyst as well as a preparation method and application thereof, and the preparation method specifically comprises the following steps: respectively adding Fe (NO3) 3.9 H2O, Co (NO3) 2.6 H2O and BaZr0. 1Ce0. 7Y0. 1Yb0. 1O3-delta into absolute ethyl alcohol, uniformly stirring, pouring into an active metal salt solution, oscillating to uniformly distribute the active metal and the catalyst, and sequentially drying, grinding and calcining the powder to obtain the supported FeCo alloy bimetallic catalyst. According to the invention, BaZr0. 1Ce0. 7Y0. 1Yb0. 1O3-delta is taken as a carrier, Ba is alkaline earth metal, ammonia decomposition catalytic performance can be improved through electron donating effect, the catalyst has the effect of a structure promoter, local arrangement of Fe and Co atom surfaces is changed, the catalyst is an electrolyte material of a proton ceramic fuel cell (PCFC), active metal can be internally reformed into a positive electrode of the PCFC, ammonia is taken as a direct fuel, and the catalyst can be used as a fuel cell. The system integration level and the fuel utilization rate are improved.

The invention relates to the field of desorption and regeneration of a CO2-rich amine solution, and discloses a graphene aerogel, a regenerated catalyst, application of the regenerated catalyst and a regeneration method of the CO2-rich amine solution, the B acid content of the graphene aerogel is 0.001-0.05 mmol / g, the specific surface area is 40-200m < 2 > / g, and the volume of pores with the pore diameter being less than 20nm accounts for not less than 50% of the total pore volume of the graphene aerogel. The graphene aerogel is applied to a regenerated catalyst of a CO2-rich amine solution, and is beneficial to catalyzing CO2 desorption, reducing the initial temperature and the end temperature of desorption, increasing the desorption rate, shortening the desorption time, reducing the desorption energy consumption and increasing the desorption amount.

The invention provides a preparation method of a gradient porous material loaded noble metal catalyst. The method comprises the following steps: preparing hydroxyapatite powder; the preparation method comprises the following steps: taking hydroxyapatite powder, adding absolute ethyl alcohol, performing ultrasonic dispersion to prepare a suspension, adding polyvinyl butyral, and stirring with a magnetic stirrer to uniformly disperse the polyvinyl butyral to form hydroxyapatite slurry; taking three kinds of Pt catalyst loaded polylactic acid / glycolic acid copolymer microspheres with different particle sizes, and laying the microspheres in a mold according to the particle sizes; pouring the hydroxyapatite slurry into a mold, applying a certain pressure to fill gaps of microspheres with the hydroxyapatite slurry, and completely drying; and sintering in a sintering furnace to obtain the gradient porous material loaded noble metal catalyst. According to the invention, the noble metal catalyst is loaded on the gradient porous material, and the gradient aperture structure can promote the reactants to be guided by the capillary tube and quickly transfer the mass to each active site, so that the rate and efficiency of the selective hydrogenation performance are improved.

The invention provides a defect-rich molybdenum monatomic doped low-content noble metal catalyst which is prepared by taking an organic framework material as a nitrogen-doped carbon precursor, uniformly dispersing trace noble metal salt and a molybdenum source in a precursor solution, performing hydrothermal synthesis, and putting a proper amount of ammonium salt into a gas inlet of a tubular furnace to perform high-temperature carbonization on the precursor. Molybdenum single atoms are uniformly dispersed on a carbon substrate, and active sites are fully exposed. Therefore, the oxygen reduction reaction kinetics is improved; meanwhile, through ammonium salt pyrolysis, the nitrogen content is increased, the carbon carrier is etched, the number of active sites is increased, and the oxygen reduction activity of the catalyst is further improved.

The invention discloses a method for restoring arsenic and halogenated hydrocarbon combined contaminated soil through oxidation enhanced leaching and a leaching agent. The leaching agent is composed of a first-stage leaching solution and a second-stage leaching solution. The first-stage leacheate eluting agent is composed of persulfate and strong base; the second-stage leacheate eluting agent is composed of organic acid and alcohol. According to the method, a two-stage leaching mode is adopted for the arsenic and halogenated hydrocarbon combined contaminated soil, synchronous removal of arsenic and halogenated hydrocarbon in the contaminated soil can be achieved through the oxidation strengthening synergistic interaction effect of the leaching agent, the toxicity of arsenic can be reduced, potential safety hazards in the subsequent waste liquid treatment process can be reduced, and the method is mild in condition and easy to implement. The method has the advantages of high removal rate, low cost and the like.

The invention discloses an oil-gas-water three-phase separation device for promoting gas desorption and defoaming and a separation method, and belongs to the field of gathering and transportation of ground engineering. The pre-separator is separated from the main separator, so that the effect of improving the stability of a flow field in the main separator can be achieved. The disturbance paddle is mounted below the inner wall of the main separator, gas desorption of gas-dissolved crude oil can be accelerated through the rotary desorption-promoting disturbance paddle, the foaming process is promoted, and the separation efficiency is improved. The defoaming component is composed of the guide rail, the first scraper blade and the second scraper blade, the first scraper blade and the second scraper blade are installed on the guide rail, the two defoaming scraper blades move left and right in the direction of the top guide rail, and when the two defoaming scraper blades are attached together, the foam breaking task of foamed crude oil can be efficiently completed. By arranging a weir plate, a water outlet pipe, an oil outlet pipe and a second gas outlet pipe, oil-gas-water separation can be achieved after desorption and defoaming are completed. Therefore, the separation device is more efficient and simpler to separate the foaming fluid, and can solve the problems in the prior art.

The invention discloses a method for synthesizing a biomass-based carbon material by coupling activation through a molten salt method, which comprises the following steps: (1) crushing a biomass raw material into powder, and pre-carbonizing at high temperature in an inert atmosphere to obtain biochar; (2) mixing biochar, chlorate molten salt and an activating agent, and calcining at high temperature in an inert atmosphere to obtain a carbon material; and (3) washing the obtained carbon material with water, carrying out suction filtration after water washing, then carrying out acid washing, carrying out suction filtration after acid washing, then carrying out water washing until eluate is neutral, and then drying to obtain the biomass-based carbon material. The invention also discloses an application of the carbon material prepared by the method in preparation of a supercapacitor. The biomass-based capacitor carbon material prepared by the invention has a graded porous structure, micropores are beneficial to improving the surface adsorption capacity of ions, mesopores can provide more active sites and enhance the ionic conductivity, and macropores can provide a rapid substance transmission channel and reduce the mass transfer resistance; through an electrochemical performance test, when the material is used as a supercapacitor electrode material, the material has excellent capacity and cycling stability.

The invention relates to a method for repairing polycyclic aromatic hydrocarbon contaminated soil, which comprises the following specific steps: S1, eluting the polycyclic aromatic hydrocarbon contaminated soil by using a surfactant to obtain eluted soil; s2, modifying the biochar by adopting a modification solution to obtain modified biochar; and S3, the modified charcoal obtained in the step S2, MoS2 and monopersulfate are mixed and put into the eluted soil obtained in the step S1, and remediation of the polycyclic aromatic hydrocarbon contaminated soil is completed. Compared with the prior art, when the surface active agent, the biochar and the MoS2 technology are comprehensively applied to remediation of the polycyclic aromatic hydrocarbon contaminated soil, the surface active agent is firstly used for enhancing the solubility and the bioavailability of the PAHs; then, the modified biochar is combined with a MoS2 or PMS system to form a composite remediation system, and the removal efficiency and the remediation effect of polycyclic aromatic hydrocarbons (PAHs) can be improved.

The present invention proposes a device for promoting gas desorption by heating underground in coal mines, including a heating drill pipe, a water inlet pipe, a heating pipe, a water return pipe and a metal hose with a joint; metal hoses are installed at both ends of the water inlet pipe, the heating pipe and the water return pipe; wherein the water inlet pipe and the water return pipe are respectively installed on the outside of both sides of the heating drill pipe; the heating pipe sleeve is installed inside the heating drill pipe; the two ends of the heating pipe are respectively connected to the water inlet pipe and the water return pipe through the metal hose. The present invention is easy and quick to install, and the installation length can be adjusted according to actual needs; the use of parallel pipelines can ensure that the temperature around the drill pipes of each unit length is consistent, so that the desorption of the coal body in the entire borehole remains consistent; using water as the heat transfer medium is safer and more efficient.

The present invention relates to the technical field of recycling valuable metals in waste lithium batteries, and in particular to a method for preparing a magnetic biochar adsorbent for recycling valuable metals in lithium batteries. The preparation method uses biochar as a carrier, loads Fe3O4 on the original biochar material, and magnetizes it to finally form a porous carbon material adsorbent. The magnetic biochar adsorbent for recycling valuable metals in lithium batteries prepared by the present invention has a rich pore structure and a high specific surface area, is simple to synthesize, has low raw material cost, and has the advantages of being environmentally friendly. It has good adsorption performance for valuable metal ions in waste batteries, and magnetization also allows the adsorbent to be better separated from the solution, which is beneficial to the subsequent desorption and reuse of valuable metal ions, and the magnetic biochar adsorbent can be used multiple times, further reducing economic costs.

The application discloses a titanium nitride supported osmium platinum catalyst with a gradient polarization effect, a preparation method of the catalyst and application of the catalyst in fuel cells, and belongs to the field of new energy materials and electrocatalysis technology. The catalyst comprises a TiN carrier and a Pt-Os alloy cluster supported on the carrier, wherein Os is doped in the form of a single atom in a Pt nanocluster. A gradient polarization architecture is constructed inside the catalyst, electrons are directionally transferred in TiN-Pt-Os, and electron-rich Os single atoms act as oxygenophilic sites to capture OH ‑ , adjacent Pt sites dissociate H2, through two-site cooperation and interface water network regulation, significantly accelerating the kinetics of alkaline hydrogen oxidation reaction. The mass activity of the catalyst reaches 11337 A / g, which is 24.7 times that of commercial Pt / C; when applied to an AEMFC single cell, the peak power density reaches 1.49 W / cm 2 , which is 2.7 times that of commercial Pt / C, and has excellent practical application prospect.

The invention provides a preparation method of a hydrogenation catalyst and a method for preparing trimethyl hydroxyethyl propane diamine by using the catalyst. A carrier of the catalyst is a bimetallic oxide carrier, active components of the catalyst are Pd and Ni, and auxiliaries are selected from chromium, manganese, lithium, tin, iron and cerium. The catalyst can be used for preparing trimethyl hydroxyethyl propane diamine by taking N, N-dimethylaminopropionitrile, N-methylethanolamine and hydrogen as raw materials, and is high in activity, high in selectivity, stable in performance and long in service life. In addition, a new reaction route is adopted, ethylene oxide is not used, the risk of the process can be reduced, in addition, raw materials are cheap and easy to obtain, reaction conditions are mild, the product yield is high, the production cost is low, economical efficiency is good, and good industrial application prospects are achieved.