459 results about "Joule heating" patented technology

An article for joule heating is described, including a three-dimensional substrate on and / or in which a pyrolyzate of a phenolic resin or polymer forms an electrically conductive carbon network. Such articles may be incorporated in structured materials applications, which may include support, sorbent, and or catalyst components. Also described are methods of fabricating such articles and structured materials, and apparatus comprising same, and methods of use of such articles and structured materials and apparatus for conducting material transformation processes requiring input of heat for their performance, such as CO2 adsorption, methane pyrolysis for hydrogen and carbon production, hydrogen-assisted conversion of CO2 to hydrocarbons, including catalytic conversion of CO2 to olefins, catalytic conversion of CO2 to propane (liquefied petroleum gas), and catalytic conversion of CO2 to renewable natural gas, reverse water gas shift reaction, steam ethane cracking, propane cracking, steam methane reforming, and dry methane reforming.

The invention discloses a method for rapidly preparing a hard carbon negative electrode material from a waste wind turbine blade, an obtained product and application, and the method comprises the following steps: putting the waste wind turbine blade into a mixed solution of acetic acid and hydrogen peroxide, heating for reaction, filtering after the reaction, and distilling filtrate to obtain degraded resin; and carrying out heating curing on the degraded resin to obtain cured resin, carrying out pre-carbonization on the cured resin, and then carrying out Joule heat high-temperature carbonization to obtain the hard carbon negative electrode material. According to the method, fibers and resin in the waste wind turbine blades are separated through one-step reaction by adopting a chemical recovery method, and the hard carbon negative electrode material is prepared by utilizing a Joule heating technology, so that the preparation period of the hard carbon negative electrode material is shortened, the energy consumption is reduced, and the application of the hard carbon negative electrode material in the sodium-ion battery has good application prospects. And the initial coulombic efficiency, platform capacity and total capacity of the prepared sodium ion battery can be simultaneously improved.

The invention belongs to the technical field of energy storage materials, and particularly relates to a high-entropy oxide Fe0. 2Co0. 2Ni0. 2Cu0. 2Zn0. 2O and an ultrafast synthesis method and application thereof. According to the preparation method, ferroferric oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide with equal molar ratio are adopted as direct synthesis raw materials, toxic gases such as chlorine and nitrogen dioxide generated in the synthesis process of a metal salt precursor are avoided, and the uniformly distributed single-phase high-entropy oxide is synthesized in an ultrafast manner within 10 seconds by using a Joule heating technology; the synthesized high-entropy oxide is used as a lithium ion battery negative electrode material, and shows more excellent electrochemical performance and cycling stability compared with other high-entropy oxides prepared from transition metals with different proportions; in the preparation process, extra additives are not needed, operation is easy, the synthesis speed is high, the yield is high, element distribution is uniform, and the method has the advantages of being low in cost, high in efficiency and free of pollution and has the industrialization prospect.

An article for joule heating is described, including a three-dimensional substrate on and / or in which a pyrolyzate of a phenolic resin or polymer forms an electrically conductive carbon network. Such articles may be incorporated in structured materials applications, which may include support, sorbent, and or catalyst components. Also described are methods of fabricating such articles and structured materials, and apparatus comprising same, and methods of use of such articles and structured materials and apparatus for conducting material transformation processes requiring input of heat for their performance, such as CO2 adsorption, methane pyrolysis for hydrogen and carbon production, hydrogen-assisted conversion of CO2 to hydrocarbons, including catalytic conversion of CO2 to olefins, catalytic conversion of CO2 to propane (liquefied petroleum gas), and catalytic conversion of CO2 to renewable natural gas, reverse water gas shift reaction, steam ethane cracking, propane cracking, steam methane reforming, and dry methane reforming.

The invention discloses an efficient ammonia decomposition hydrogen production system based on the Joule heating effect and belongs to the technical field of clean energy. The system is composed of an ammonia supply module, a Joule thermally driven ammonia decomposition reaction module and a hydrogenation module. Wherein the ammonia supply module consists of a liquid ammonia storage device, a vaporizing chamber and an ammonia gas storage device; the Joule thermally-driven ammonia decomposition reaction module consists of an ammonia gas flow control valve, a reaction tube gas inlet, a reaction tube gas outlet, a Joule heating electrode tip, a direct-current power supply, a temperature sensor, a thermal insulation layer, a reaction tube, a catalyst and a stainless steel alligator clip; the hydrogenation module is composed of a hydrogen purifying and drying device, a hydrogen compressor, a hydrogen cooling unit, a high-pressure hydrogen storage tank, a hydrogen flow control valve and a hydrogenation machine. The whole process can be started and stably output within one second, the conversion rate and the electrothermal conversion efficiency both exceed 90%, low energy consumption, quick response and safe operation are achieved, the system is particularly suitable for hydrogen refueling station construction in a future hydrogen energy network, and green hydrogen energy economy development is promoted.

The invention discloses a method for preparing an iron-nickel-molybdenum-based electrocatalyst through combination of electrodeposition and rapid Joule heat and application of the method. The method comprises the steps that S1, a porous nickel substrate is pretreated, and the pretreated porous nickel substrate is obtained; s2, obtaining a nickel salt solution, a molybdenum salt solution and a ferric salt solution; s3, obtaining a mixed solution; s4, putting the mixed solution serving as electrolyte into a dual-electrode electrolytic tank, carrying out electro-deposition treatment by taking the pretreated porous nickel substrate as a cathode and an inert electrode as an anode, and washing and drying to obtain a Fe-Ni-Mo-LDH precursor; and S5, carrying out Joule thermal pyrolysis treatment on the Fe-Ni-Mo-LDH precursor, so as to obtain the iron-nickel-molybdenum based electrocatalyst. The preparation method can effectively regulate and control the size structure of the catalyst, and is suitable for preparing iron-nickel-molybdenum-based electrocatalysts with different substrates and different sizes; and the electrocatalyst has the advantages of uniform and stable nanostructure and high loading capacity. Meanwhile, the preparation method is short in reaction time, high in heating efficiency, high in repeatability and suitable for industrial large-scale production.

The invention discloses a method for preparing silicon carbide materials by using coal gasification slag, belonging to the field of solid waste recycling. The solution of the invention includes first pre-treating the coal gasification slag, then performing acid leaching, water washing, suction filtration and drying on the pre-treated coal gasification slag, and then performing Joule heating treatment. After calcination, silicon carbide is obtained; in the Joule heating treatment, the discharge voltage is set to 120V-150V, and the number of discharges is 1-5 times. By performing Joule heating treatment on the coal gasification slag, the reaction time of each Joule heating reaction is extremely short, greatly reducing the energy consumption, and sharply shortening the reaction time, solving the technical problem of high energy consumption caused by the long reaction time in the traditional carbothermal reduction for preparing silicon carbide materials in the prior art.

The invention provides a method for regulating and controlling cooling time after Joule heating and a high-entropy oxide electrocatalyst based on the method, and belongs to the technical field of electrocatalytic electrolysis of water. According to the method, the relationship between the graphite substrates with different mass area ratios and the cooling time is determined based on the Newton's law of cooling by carrying out volume segmentation on the graphite substrates; the structure and performance of the high-entropy oxide electrocatalyst are regulated and controlled on the basis of a cooling time regulation and control strategy; the prepared high-entropy oxide electrocatalyst has excellent oxygen evolution reaction catalytic activity in an alkaline environment, the structure of the high-entropy oxide electrocatalyst with the cooling time of 0.3 s is a nanowire assembled by fine nano-particles, the high-entropy oxide electrocatalyst shows the optimal electrochemical performance, and under the current density of 10 mA cm <-2 >, the high-entropy oxide electrocatalyst has excellent oxygen evolution reaction catalytic activity. And the overpotential is only 219 mV. The method provided by the invention is simple and efficient, and can be widely applied to preparation and performance optimization of the electrocatalyst.

The present invention discloses a multifunctional and convenient reaction chamber for an electrically triggered Joule heating device and an operating method thereof, wherein the reaction chamber comprises a sealing cover and a base that are buckled together, wherein a first conductive fixing clamp and a second conductive fixing clamp are provided in parallel on the inner bottom plate of the base, wherein a sample fixing clamp is clamped and fixed between the first conductive fixing clamp and the second conductive fixing clamp, wherein electrodes are respectively mounted on both ends of a clamping plate on one side of the sample fixing clamp, and the electrodes at both ends are respectively in contact with and cooperate with the corresponding side clamps of the first conductive fixing clamp and the second conductive fixing clamp, wherein the sample is arranged between the clamping plates that are opposite to each other and the two ends of the sample are respectively in contact with and cooperate with the electrodes, and a cooling system is respectively provided on both sides of the sample fixing clamp. The present invention also discloses an operating method for a multifunctional and convenient reaction chamber for an electrically triggered Joule heating device. The present invention can achieve a higher precursor loading amount and a faster cooling speed, and can also meet the requirements of preparing a sample vacuum environment and a variety of reaction atmospheres.

The invention relates to an enameled round wire, to a method for producing an enameled round wire and to the use of an enameled round wire. So far, lubricating wire paints, in particular wire paints having polymers containing siloxane groups, cannot be impregnated because the uppermost "last" lubricating layer in the multilayer wire paint structure is non-polar due to the siloxane groups. The invention suggests that the multilayer structure can be used in order to break at least the uppermost layer of lubricating paint by means of an intermediate step of energizing and / or Joule heating, which is often present, to raise the temperature to 200 DEG C or higher for a short period of time, thus, the subsequent impregnation with the liquid impregnating resin can be bonded to the thermally labile layer below the uppermost lubricating layer.

The invention relates to the technical field of Joule heating, in particular to a high-thermal-conductivity composite film and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: blending hydroxyl modified poly (p-phenylene benzobisoxazole) fibers and polyether-ether-ketone fibers to obtain PBO-OH / PEEK fiber cloth; the preparation method comprises the following steps: mixing a soluble polyether-ether-ketone solution, NH2-MWCNTs and GnPs, and carrying out ultrasonic treatment to obtain a spraying solution; and spraying the spraying liquid on the upper surface and the lower surface of the PBO-OH / PEEK fiber cloth in an electrostatic spraying manner, and performing hot pressing to obtain the high-thermal-conductivity composite film. The high-thermal-conductivity composite film prepared by the preparation method has excellent mechanical properties, and also has excellent in-plane thermal conductivity, electrical conductivity and electromagnetic shielding effect.

The invention provides roll-to-roll continuous Joule heating equipment. The roll-to-roll continuous Joule heating equipment comprises a heating box, the base material releasing assembly is arranged at one end in the heating box; coating a protective cover; the coating assembly is mounted in the coating protective cover and comprises a coating guide roller set, a liquid guide inclined plate is arranged at a coating gap of the coating guide roller set, a swing driving part is mounted at the inner end of the top of the liquid guide inclined plate, a clamping part is mounted at the outer end of the top of the liquid guide inclined plate, and a storage part is mounted on the outer side of the liquid guide inclined plate; a plurality of groups of separators which are matched and butted with the clamping components are stored in the storage component; a liquid discharge gap is reserved between the storage part and the liquid guide inclined plate; a liquid receiving assembly; a liquid guide assembly; a Joule heating assembly; a spraying assembly; and a base material winding assembly. According to the invention, Joule heat is utilized to quickly dry the coating layer, so that continuous operation of releasing the base material, coating / spraying, heating and drying, and rolling is realized, the continuity of the heating process can be realized, and the experiment or production efficiency is greatly improved.

The object of the present disclosure is to provide a piezoelectric device and the like capable of suppressing temperature unevenness in a piezoelectric layer during polarization of the piezoelectric device. A piezoelectric device having a capacitor structure in which a first electrode layer having two first electrode terminals, a piezoelectric layer, and a second electrode layer are laminated in this order, wherein the first electrode layer is Joule-heated by a potential difference between the two first electrode terminals, and the piezoelectric layer is polarized by an electric field generated by a potential difference between the first electrode layer and the second electrode layer while being heated by the Joule-heated first electrode layer.

The present invention relates to a method for synthesizing graphene, and more particularly, to a method for synthesizing graphene by flash Joule heating (FJH). Such methods may be used to synthesize disordered graphene in large volumes, including low-defect disordered graphene. Such methods may further be used in the synthesis of composite materials and 2D materials.

The invention discloses an electric pulse and salt crystallization synergetic coal seam anti-reflection system and method, and the system comprises a salt solution preparation tank which is internally provided with a Na2SO4 saturated solution; one ends of the first high-pressure water injection pump and the second high-pressure water injection pump are respectively communicated with the salt solution preparation tank, and the other ends of the first high-pressure water injection pump and the second high-pressure water injection pump are respectively communicated with the negative electrode drill hole and the positive electrode drill hole through a first pipeline and a second pipeline; the positive electrode end of the electric pulse generating device is connected with a positive electrode, the positive electrode is arranged in the positive electrode drill hole, the negative electrode end of the electric pulse generating device is connected with a negative electrode, the negative electrode is arranged in the negative electrode drill hole, and the electric pulse generating device is configured to generate a large number of microfractures in the coal body by utilizing the electrogenerated shock wave and the Joule heating effect and drive the Na2SO4 saturated solution to diffuse towards the deep parts of the fractures; and the first cooling jet device and the second cooling jet device are respectively communicated with the negative electrode drill hole and the positive electrode drill hole and are configured to respectively inject a low-temperature medium into the negative electrode drill hole and the positive electrode drill hole.

The invention relates to the technical field of garbage treatment, in particular to a method for removing heavy metal in garbage incineration fly ash based on a flash evaporation Joule heating technology, which comprises the following steps: step 1, uniformly mixing the garbage incineration fly ash with a conductive heat-assisting material to obtain a mixture; and 2, the mixture is subjected to flash evaporation Joule heating treatment and cooled, and waste incineration fly ash residues are obtained. According to the method, the flash evaporation Joule heating technology is applied to rapid removal of the heavy metal in the waste incineration fly ash, the fly ash and the conductive heat-assisting material are mixed, and the resistance of the fly ash is set to be smaller than or equal to 3 ohms, so that second-level high-temperature treatment is achieved, and form transformation and efficient volatilization of the heavy metal such as Pb, Zn and Cd are remarkably promoted. According to the technology, the electrical property of the mixture is regulated and controlled through low-voltage pulse pretreatment, and an efficient, low-consumption and green dry-type fly ash heavy metal treatment path is constructed in combination with accurately controlled flash evaporation voltage, time and frequency.

The invention discloses a Cu-based oxide loaded Cu-based alloy and a preparation method and application thereof. Uniformly mixing a Cu source and a second metal source in a solvent, and then centrifuging and drying to obtain a solid precursor; placing the obtained solid precursor in a Joule heating graphite groove, raising the temperature to 600-800 DEG C by using Joule heat generated by pulse discharge under a protective atmosphere, then cooling to room temperature, and circulating heating-cooling for 5-7 times to prepare the Cu-based oxide loaded Cu-based alloy, the method is extremely high in synthesis speed, simple to operate and extremely low in energy consumption, and the obtained material shows excellent catalytic activity and stability in an electro-catalysis carbon dioxide reduction reaction.

Flash Joule heating (FJH) for production of one-dimensional (1D) carbon and / or boron nitride nanomaterials, and 1D materials integrated with 0D, 1D, 2D, and 3D nanomaterials, composites, nanostructures, networks, and mixtures thereof. Such materials produced by FJH include 1D carbon and hybrid nanomaterials, boron nitride nanotubes (BNNTs), turbostratic boron-carbon-nitrogen (BCN), doped (substituted) graphene, and heteroatom doped (substituted) re-flashed graphene.

Systems and methods for heating feedstock, thermal decomposition of feedstock, and chemically activated chemical reaction of feedstock by indirectly heating the feedstock with a volume of joule heated electrically conductive powder that heats the feedstock, wherein the feedstock can be gas, liquid, or solid. The embodiments disclosed herein further relate to systems and methods for joule heating induced pyrolysis or thermal decomposition of feedstock, including methane or other hydrocarbons to produce, for example, hydrogen and / or various carbon materials that are collected.

The invention discloses a method for preparing a lignin hard carbon negative electrode material through Joule thermal flash evaporation, and belongs to the technical field of negative electrode material preparation. The method mainly comprises the following steps: (1) reacting lignin with alkali liquor, adding acid, washing with water, and drying to obtain dried lignin; (2) preheating the dried lignin in a tubular furnace to obtain a hard carbon precursor; and (3) putting the hard carbon precursor into a graphite mold, and carbonizing through Joule heat flash evaporation to obtain the lignin-based hard carbon negative electrode material. According to the method, rapid temperature rise is realized by Joule heating, and the method is short in reaction time and high in reaction temperature. Compared with a radiation cooling mode of a traditional high-temperature furnace, black-body radiation can release most heat within milliseconds. Under the action of an electric field, lignin is recombined and stacked into a vortex layer carbon layer, and a three-dimensional continuous carbon network is formed. The ultrafast method can relieve the carbon layer accumulation phenomenon in the lignin pyrolysis process.

Ultrafast flash evaporation joule heating synthesis methods and systems, more particularly, ultrafast synthesis methods for recovering metals from ores, fly ash, and bauxite residue (red mud).

The invention provides a preparation method of a Joule heat-assisted super-wetting metal net, a metal net with super-hydrophilic performance and a metal net with super-hydrophobic performance. According to the material, carbon nanotubes are firmly adhered to the surface of a metal net through polydopamine mediation to construct a micro-nano coarse structure, a hydrophobic alkyl compound is grafted through a sulfenyl three-component coupling reaction to reduce surface energy, and a super-hydrophilic / underwater super-oleophobic metal net and a super-hydrophobic metal net are prepared respectively. The Joule heating effect of the material is remarkably enhanced by introducing the carbon nanotubes, so that the temperature of the material can be rapidly increased to 100 DEG C or above within 20 seconds under the ultralow voltage of 2.0 V. The characteristic can be effectively used for in-situ heating viscosity reduction of high-viscosity crude oil, continuous and efficient oil-water separation is achieved in a double-channel separation device, the crude oil flux reaches up to about 3985 L.m <-2 >. H <-1 >, and the separation efficiency exceeds 98.6%. The method is also suitable for stainless steel meshes with micron-sized apertures, and can realize efficient separation of various crude oil emulsions.

The invention discloses a Joule heat heating-based YAG transparent ceramic rapid welding method, and belongs to the technical field of welding. According to the method, a Joule heat ultra-fast high-temperature heating method is utilized, and a glass solder is adopted for connecting YAG transparent ceramics, so that a joint with high strength and high light transmittance is obtained. The method specifically comprises the following steps: carrying out grinding and polishing treatment on the YAG ceramic surface; the preparation method comprises the following steps: weighing oxide raw materials according to the composition of the glass material, uniformly mixing, and preparing glass powder by adopting a melting-water quenching method; preparing the glass powder into slurry, and uniformly coating the surface of the transparent YAG ceramic with the slurry; and placing in an ultra-fast high-temperature sintering furnace for connection. According to the Joule heat ultra-fast high-temperature connection YAG transparent ceramic, connection is completed within one minute through the fast heating and cooling process, a connector with high strength and high light transmittance is obtained, and the production efficiency is greatly improved.

The invention discloses a preparation method of a high-entropy layered oxide, which comprises the following steps: 1) weighing metal nitrate and an organic compound, adding deionized water, stirring and dispersing to form a uniform complex; 2) transferring the complex to Joule thermal equipment, and further performing Joule thermal reaction to obtain a high-entropy layered oxide precursor; 3) grinding and uniformly mixing the high-entropy layered oxide precursor prepared in the step 2), a sodium source and a lithium source to obtain solid powder; and 4) placing the solid powder in Joule thermal equipment for Joule thermal reaction to obtain the high-entropy layered oxide powder. According to the method, metal nitrate is adopted as an oxidizing agent, an organic compound is adopted as a reducing agent, a violent oxidation-reduction reaction occurs during Joule thermal reaction, a large amount of gas and heat are released, metal cations are rapidly diffused, and uniform high-entropy layered oxide is formed. The high-entropy layered oxide has relatively high specific surface area, good crystallinity and excellent electrical properties.

The invention belongs to the technical field of pyrometallurgy and hydrometallurgy, and discloses an efficient leaching method for Joule thermal shock strengthened vanadium titano-magnetite. The Joule thermal shock strengthened vanadium-titanium resource efficient leaching comprises the steps that low-grade vanadium-titanium magnetite ore powder and a carbon source are mixed and then subjected to Joule thermal shock activation treatment, and an obtained activation product is leached through dilute acid or organic acid, so that valuable metal such as vanadium, titanium and iron can be efficiently leached out. Vanadium titano-magnetite and a small amount of carbon powder are subjected to Joule thermal shock, so that the valence state of metal ions is reduced, and the leaching activity of metal is improved. The Joule thermal shock strengthening low-grade vanadium titano-magnetite acid leaching method has the advantages of being high in activation efficiency, high in metal element leaching efficiency and the like.

A system and method for a conversion of plastic and carbon feedstock resulting in a hybrid morphology of carbon nanotubes is provided herein. The system includes a feedstock containing a plastic, a conductive carbon, and a metal-based catalyst. The system further includes a plurality of graphite electrodes configured to conduct a current through the feedstock. The system further includes a reservoir configured to contain the feedstock while allowing outgassing during the conversion. The system further includes a chamber configured to contain combustible volatile substances. The system further includes a power source configured to provide electrical power for the conversion. The system further includes an electrical controller configured to use a feedback mechanism for controlling the conversion and growth of the carbon nanotubes.

The technology described herein is directed towards a reconfigurable intelligent surface (RIS) based on microelectromechanical systems (MEMS) technology, in which metallic MEMS micro-actuators are integrated into unit cells of the RIS. Dual ring-shaped metallic cantilevers, resulting from unit cell fabrication, operate as electrothermal actuators in the unit cell's resonating pattern. A controlled voltage can be separately applied to each ring-shaped cantilever, deforming (bending up) each ring at its non-anchored (free) portion from its generally flat non-actuated state via joule heating. The amount of vertical displacement of the free portion of each ring when voltage is applied separately changes the structure of the unit cell's geometry based on each amount of applied voltage, whereby analog-like tuning of the unit cell's characteristics (including phase shift) is obtained. When combined with the voltage-controlled phase shifts of other unit cells of the RIS, beamforming of a reflected incoming electromagnetic wave is facilitated.

The invention relates to the field of lithium ion batteries, in particular to a method for quickly and macroscopically synthesizing high-performance LiFe < 1-x > MnxPO4. The preparation method comprises the following steps: synthesizing Li3PO4, Fe3 (PO4) 2.8 H2O and Mn3 (PO4) 2.3 H2O precursors with uniform sizes by using a micro-channel reactor, mixing and drying the precursors and a carbon source to obtain mixed powder, carrying out high-temperature solid-phase treatment on the mixed powder by using a Joule heating technology, and directly heating reactants by using current to promote the growth of LiFe1-xMnxPO4 crystals, thereby finally synthesizing the high-performance LiFe1-xMnxPO4. According to the method, the precursor is synthesized by using the micro-channel reactor, a uniform supersaturated environment can be provided for precursor particle nucleation through micro-mixing, and particles with uniform particle size distribution can be more favorably generated; meanwhile, Joule heating is adopted, so that the reaction efficiency is improved, and the electrochemical performance of LiFe < 1-x > MnxPO4 is also improved.

Methods and systems for recovering and reusing conductive additives for flash Joule heating. The conductive additive or flash Joule heated material utilized, such as electronic waste, ore, fly ash, soil, and / or bauxite slag, may be recovered at high recovery yields higher than 85%, and then may be reused for additional flash Joule heating processes. The conductive additive may be separated from the product of the flash Joule heating process, such as by screening or by centrifugation, filtration, and drying.

The invention discloses a method for preparing a tungsten trioxide low-platinum electrocatalyst with a core-shell structure through pulse Joule heating, and belongs to the field of electrochemical catalysts for electrolysis of water. The invention aims to solve the problems that controllable amorphization is difficult to realize on the WO3 surface and a crystal nucleus-amorphous shell composite structure cannot be effectively constructed in the prior art. The preparation method comprises the following steps: 1, preparing a tungsten trioxide carrier with a core-shell structure; and 2, loading a platinum source. The method is used for preparing the tungsten trioxide low-platinum electrocatalyst with the core-shell structure through pulse Joule heating.