255 results about "Carbocatalysis" patented technology

The invention relates to the technical field of ORR catalyst preparation, in particular to an iron-nitrogen-carbon catalyst and a preparation method and application thereof. The invention provides a preparation method of an iron-nitrogen-carbon catalyst, which is characterized by comprising the following steps: dispersing zinc salt and ferrite in methanol to obtain a mixed solution A; the preparation method comprises the following steps: dispersing 2-methylimidazole and 1, 4-terephthalonitrile in methanol under a heating condition to obtain a mixed solution B; stirring and mixing the mixed solution A and the mixed solution B to obtain precursor powder, and calcining the precursor powder in an inert atmosphere to obtain the iron-nitrogen-carbon catalyst with the hierarchical porous structure. The invention provides a novel preparation method for preparing the iron-nitrogen-carbon catalyst with the hierarchical pore structure, and the iron-nitrogen-carbon catalyst with the hierarchical pore structure is prepared by introducing a 1, 4-terephthalonitrile molecular template.

The invention discloses a molasses-based biomass sulfonated carbon catalyst preparation method, which comprises: grinding and mixing solid molasses and sodium hydroxide, calcining at 500-650 DEG C in an inert atmosphere to obtain activated carbon, and carrying out a sulfonation reaction on the activated carbon and concentrated sulfuric acid to obtain the catalyst. According to the method, by-product molasses in the sugar industry is taken as a raw material, a carbon source is rich in source, low in price and easy to obtain, the process is simple, the catalyst has relatively high specific surface area and conversion rate, the by-product can be utilized in a high-valued manner, and the method has certain industrial practical value.

The invention relates to the technical field of chemical engineering, and particularly discloses a palladium-carbon catalytic hydrogenation reaction material treatment system, which comprises a three-dimensional workshop structure, an air-operated hoist, an air supply system, an air supply system and an air supply system, wherein the top of the three-dimensional workshop structure is provided with an elevator and a hoisting ton bag; the palladium-carbon circulating unit comprises a palladium-carbon preparation kettle, a hydrogenation reaction kettle, a decarbonization filter, a filter pressing cylinder, a sample splitter and a glove box which are connected in sequence, and the sample splitter is connected back to the palladium-carbon preparation kettle through a closed pipeline; the solid feeding unit comprises a ton bag feeder, a pneumatic valve and a spiral conveying pipe, and the tail end of the solid feeding unit is connected with a top feeding hole of the hydrogenation reaction kettle; the gas supply system comprises a hydrogen cylinder group and is connected to a gas distributor at the bottom of the hydrogenation reaction kettle through a pressure reducing valve and a flow regulating valve; through the multi-stage separation design and the safety interlocking mechanism of the palladium-carbon circulating unit, the recovery rate of the catalyst is increased, meanwhile, the pressure, temperature and stirring state are monitored in real time to trigger nitrogen purging or pressure relief, and the risks of hydrogen leakage and reaction out-of-control are reduced in combination with inert gas protection of the glove box.

The present invention relates to the technical field of ORR catalyst preparation, and in particular to an iron-nitrogen-carbon catalyst and its preparation method and application. The present invention provides a method for preparing an iron-nitrogen-carbon catalyst, characterized in that it comprises: dispersing a zinc salt and a ferrous salt in methanol to obtain a mixed solution A; under heating conditions, dispersing 2-methylimidazole and 1,4-terephthalonitrile in methanol to obtain a mixed solution B; stirring and mixing the mixed solution A and the mixed solution B to obtain a precursor powder, and calcining the precursor powder under an inert atmosphere to obtain an iron-nitrogen-carbon catalyst with a hierarchical porous structure. The present invention provides a new preparation method for preparing an iron-nitrogen-carbon catalyst with a hierarchical pore structure, which prepares the iron-nitrogen-carbon catalyst with a hierarchical pore structure by introducing a 1,4-terephthalonitrile molecular template.

The embodiment of the invention relates to the technical field of flow batteries, and provides a carbon felt electrode for a flow battery and a preparation method thereof, and the preparation method comprises the following steps: preparing a mixed salt solution containing first metal ions and second metal ions; preparing an alcohol solution containing 2-methylimidazole; adding the mixed salt solution into the alcohol solution, and uniformly mixing to obtain a precursor solution; immersing the cleaned carbon felt into the precursor solution for a first time, then taking out the carbon felt, cleaning the carbon felt with an alcohol solvent, and drying the carbon felt to obtain a ZIF carbon felt; and putting the ZIF carbon felt into a tube furnace protected by inert gas, and carrying out heat treatment at a preset temperature for a preset second time to obtain the carbon felt electrode. The invention provides a novel bimetallic catalyst, and the interaction between metals can promote the adsorption and activation of reactants on metal atoms and promote the proceeding of the reaction. In the nitrogen-carbon catalyst formed by carbonizing ZIF, metal ions are uniformly dispersed, and agglomeration of the metal ions in the synthesis process is prevented.

The invention relates to the field of carbon-based catalyst preparation, and discloses a preparation method of a carbon oxide catalyst, the prepared catalyst and a method for electrochemically preparing hydrogen peroxide, the method comprises the following steps: (1) mixing a carbon black material with a peroxide solution, and carrying out ultrasonic dispersion to obtain a mixed solution; (2) heating the mixed solution in the step (1) in a protective atmosphere, separating an obtained solid product, and drying to obtain a carbon oxide catalyst; wherein the mass concentration of the peroxide solution is 0.1 to 5 weight percent; the heating conditions comprise that the heating temperature is 60-100 DEG C; the heating time is 1-6 hours. According to the method, the carbon black material is treated by peroxide to obtain the carbon oxide catalyst, the hydrogen peroxide selectivity and reaction activity of the catalyst can be improved, and the preparation method is simple to operate.

The invention relates to the technical field of halogen-free flame-retardant antistatic high polymer materials, and discloses a halogen-free flame-retardant antistatic high-temperature-resistant nylon composite material and a preparation method of the halogen-free flame-retardant antistatic high-temperature-resistant nylon composite material. Comprising 50-68.4 parts of high-temperature-resistant nylon resin, 20-40 parts of reinforced fibers, 5-10 parts of a flame retardant, 0.5-1 part of a carbon forming catalyst, 1-3 parts of a synergist and 0.1-1 part of an antioxidant. The reinforcing fiber is a mixture of carbon fiber and glass fiber. The formula composition and the preparation process of the composite material are integrally optimized, so that the halogen-free flame-retardant antistatic high-temperature-resistant nylon composite material has good antistatic performance, and the fire safety and flame retardance of the composite material are greatly improved through a compact carbon layer.

The invention belongs to the technical field of catalysts, and provides an oxygen-doped carbon nitride catalyst and a preparation method and application thereof.The preparation method comprises the steps that melamine, a hydrogen peroxide aqueous solution and acetonitrile are mixed and subjected to a hydrothermal reaction, and a precursor material is obtained; and calcining the precursor material to obtain the oxygen-doped carbon nitride catalyst. The method has the following advantages: (1) the synthesis process of the catalyst is simple, the raw materials for synthesizing the catalyst are cheap and easily available, the equipment requirement for synthesizing the catalyst is simple and convenient, and the operation is easy; and (2) the catalyst has excellent reaction catalytic performance for selective oxidation of sulfides, has good substrate adaptability, is easy to recycle and reuse, and still has high yield after being used for many times. And (3) the adaptability of photocatalytic heterogeneous oxidation to substrate expansion in drug molecules is rarely reported at present, and the invention provides an application method of a metal-free photocatalyst for efficiently and selectively oxidizing sulfide under the condition of no additional additive.

The invention discloses a high-performance thermosetting resin plugging material, a preparation method and a water-based drilling fluid, and relates to the technical field of oilfield chemistry, and the preparation method of the plugging material comprises the following steps: stirring an aromatic compound containing two double bonds with sodium tungstate, a transfer catalyst and a hydrogen peroxide solution at room temperature for reaction, and purifying to obtain an epoxy compound; the preparation method comprises the following steps: heating an aromatic compound containing an aldehyde group, ammonium formate and a palladium-carbon catalyst with nitrogen to react to obtain an amine compound, transferring the epoxy compound and the amine compound into a size-adjustable mold, carrying out heating curing treatment, carrying out low-temperature ball milling on a crude product to obtain plugging material particles, and preparing the water-based drilling fluid by using the plugging material particles. The specific aromatic rigid framework monomer is selected, and the molar ratio of epoxy to the curing agent is accurately controlled, so that the mechanical strength and thermal stability of the material are remarkably optimized, and the plugging material has a good treatment effect on cracks and pores in complex stratums.

The invention relates to the technical field of carbon materials, in particular to a nanocarbon catalyst for a carbon nanotube, a preparation method and a preparation method of the carbon nanotube, and the preparation method comprises the following steps: providing a carbon source, a heteroatom source, a metal salt with a catalytic active component and an inert material lining; dissolving a carbon source, a heteroatom source and a metal salt in a solvent to form a reaction solution; the reaction liquid is transferred into an inert material lining, a heating reaction is conducted for a period of time, a product is collected after cooling is conducted, the nano metal / carbon catalyst powder is obtained, the nano metal / carbon catalyst powder is of a C-X-Me structure, C represents a carbon element, X represents a heteroatom element, Me represents a metal element, and the C-X-Me structure is formed by chelating C-X sites and metal nanoparticles. The catalyst activity can be remarkably improved, and the high-temperature aggregation and sintering phenomena of the catalyst can be inhibited.

The invention relates to the technical field of composite materials, in particular to a graphite carbon nitride catalytic membrane material and a preparation method and application thereof. The preparation method comprises the following steps: mixing melamine, a halogen source and water, drying, and carrying out heat treatment to obtain the halogen intercalation carbon nitride composite material; mixing the halogen intercalation carbon nitride composite material dispersion liquid with a metal salt solution, then adjusting the pH value to be alkaline, carrying out an in-situ coprecipitation reaction to obtain a metal oxide / halogen intercalation carbon nitride heterojunction, and carrying out vacuum calcination on the metal oxide / halogen intercalation carbon nitride heterojunction to obtain metal oxide / halogen intercalation carbon nitride heterojunction composite powder; mixing the metal oxide / halogen intercalation carbon nitride heterojunction composite powder, a polymer carrier and N, N-dimethylformamide to obtain a spinning solution, and performing electrostatic spinning to obtain a nascent fiber membrane; and calcining the nascent fiber membrane to obtain the graphite carbon nitride catalytic membrane material. The preparation method is high in operability, and the prepared material has the characteristics of stable structure and high catalytic efficiency.

The invention discloses a ruthenium-doped cobalt metal oxide nanosheet electrocatalyst and a preparation method and application thereof, and relates to the technical field of electrocatalysts.The preparation method comprises the steps that cobalt salt and trimesic acid are weighed and jointly dissolved in a methanol solution, and a mixed solution A is obtained after primary ultrasonic mixing treatment; dropwise adding a methanol solution containing ruthenium salt into the mixed solution A, carrying out secondary ultrasonic mixing treatment to obtain a mixed solution B, and carrying out hydrothermal reaction on the mixed solution B to obtain a ruthenium-cobalt metal organic framework precursor; and calcining the ruthenium-cobalt metal organic framework precursor. Compared with the prior art, the ruthenium-doped cobalt metal oxide nanosheet electrocatalyst prepared by the method shows excellent hydrogen evolution electrocatalytic activity and stability in an alkaline water electrolysis reaction, the performance of the catalyst is superior to that of a commercial platinum-carbon catalyst, and stable potential output can be kept in a 100-hour continuous test without obvious attenuation.

The invention discloses a method for preparing a fuel cell platinum-carbon catalyst, and relates to the technical field of fuel cells, and the method comprises the following steps: (1) mixing: fully mixing an alkali solution, a chloroplatinic acid solution and carbon carrier slurry according to a mass ratio, and uniformly dispersing to obtain platinum-carbon precursor slurry; (2) reaction: transferring the platinum-carbon precursor slurry into a reaction device, and carrying out first-step reaction; (3) secondary reaction: heating the cooled solution to 110-130 DEG C, carrying out secondary reaction for 10-30 minutes, ending the reaction, stopping heating, and cooling the reaction solution to 50-70 DEG C; and (4) adjusting the pH of the system. (5) cleaning and filtering: cleaning and filtering for 5-10 times by using ultrapure water to obtain a wet catalyst; and (6) drying: transferring the wet platinum-carbon catalyst into a vacuum drying box at 70-90 DEG C, and carrying out vacuum drying for 8-12 hours.

The invention relates to the field of adsorption materials, in particular to a discrete carbon-based biological base material for targeted treatment of high-concentration organic wastewater and a preparation process thereof.The discrete carbon-based biological base material is prepared from, by weight, 65-70 parts of activated carbon fibers, 8-10 parts of PLA fibers, 5-7 parts of sodium lignin sulfonate, 5-8 parts of ferroferric oxide magnetic particles and 8-10 parts of a carbon nitride catalyst; biPO4 is doped in the carbon nitride catalyst. According to the discrete carbon-based biological base material, the activated carbon fibers rapidly adsorb organic matters in high-concentration wastewater, the PLA releases a carbon source and accelerates formation of a biological membrane, and the biological membrane is degraded by taking the adsorbed organic matters as a substrate; the carbon nitride catalyst generates active oxygen under visible light to oxidize small molecular acid, and ferroferric oxide magnetic particles catalyze the reaction to break refractory toxins (such as antibiotics); after the reaction, the magnetic field recovers the material, sodium lignin sulfonate protects ferroferric oxide magnetic particles from corrosion, and regeneration performance is provided.

The invention discloses an algae-based iron-carbon catalyst as well as a preparation method and application thereof, and relates to the technical field of new material research and development and sewage treatment. The preparation method comprises the following steps: mixing ferrocene, diatomite and a solvent to obtain a mixed solution; adding a hydrogen peroxide solution into the mixed solution, and then heating for reaction to obtain an intermediate; and roasting the intermediate to obtain the algae-based iron-carbon catalyst. According to the invention, ferrocene and diatomite are used as raw materials, and the high-performance algae-based iron-carbon catalyst is prepared through simple solvothermal reaction and roasting treatment. The obtained algae-based iron-carbon catalyst is stable in structure, high in activity and wide in applicable pH range in a persulfate oxidation system, and can be used for activating persulfate to degrade antibiotic pollutants in water.

The invention relates to the technical field of photocatalytic materials, in particular to a metal single atom loaded defect carbon nitride catalyst and a preparation method and application thereof. The method comprises the following steps: by taking melamine as a nitrogen source, soluble metal salt as a metal source and ethylenediaminetetraacetic acid as a chelating agent, carrying out freeze drying in a solvent system, calcining in a protective atmosphere, and carrying out thermal polymerization, so as to obtain the metal single atom loaded defective carbon nitride catalyst. The metal in the soluble metal salt is copper, iron or manganese. Precise anchoring and high dispersion of metal ions are achieved through complexing of ethylenediamine tetraacetic acid, a stable metal-N coordination structure is formed, metal agglomeration is avoided, a defect structure is constructed synchronously, and the metal monatomic loading capacity is 1 wt.%-7 wt.%. The catalyst can efficiently catalyze and activate peroxymonosulfate and rapidly degrade antibiotic pollutants such as tetracycline, has the advantages of being low in preparation cost, environmentally friendly, high in catalytic activity and high in stability, and is suitable for the field of water pollution remediation.

The invention discloses a preparation method and application of an MOF (Metal Organic Framework) derived carbon catalyst for regulating and controlling oxygen reduction catalytic performance based on surface strain. The method comprises the following steps: firstly, constructing a cubic MOF core under the assistance of a cationic surface active agent template through coordination self-assembly of a cobalt ion node and an imidazole ligand; then, an MOF heterogeneous core-shell layer is constructed on the surface of the core through a zinc ion mediated epitaxial growth technology, and a double-layer cubic MOF precursor with a clear core-shell interface is formed. Through carbonization treatment at different temperatures, the core MOF generates controllable surface strain in the carbonization process, metal active site coordination and electronic structures can be adjusted, and the adsorption strength of sites to oxygen reduction intermediates is optimized. A rigid porous carbon frame formed after carbonization of an epitaxial MOF heterogeneous core-shell layer constructs a three-dimensional through mass transfer network through micro-mesoporous synergy, meanwhile, the rigid porous carbon frame and the strained core form a nanoscale space isolation area, and thermal migration of metal active sites and Ostwald curing are effectively inhibited by means of the geometric confinement effect. The activity and the stability of the catalyst are remarkably improved based on multiple synergistic effects caused by evolution of an intrinsic micro-nano structure induced by surface strain. The MOF derived carbon catalyst for regulating and controlling the oxygen reduction catalytic performance based on the surface strain, provided by the invention, is simple in preparation process and low in cost, and shows excellent performance and wide application prospect in a zinc-air battery.

The invention relates to a method for preparing hydrogen peroxide by electrocatalytic oxygen reduction and preparing carboxylic acid by coupling ketone oxidation, belongs to the technical field of electrocatalysis, and solves the problems of relatively high energy consumption and / or relatively low economic value of an anode product in the existing method for preparing hydrogen peroxide by electrocatalytic oxygen reduction. The method comprises the following steps: taking a carbon catalyst electrode as a cathode, wherein catholyte comprises a sodium sulfate solution; a NiCo2O4 electrode is used as an anode, and an anolyte is a solution containing potassium hydroxide and ketone; the catholyte and the anolyte are separated by a proton exchange membrane; the cathode is subjected to an electrocatalytic oxygen reduction reaction to generate hydrogen peroxide, and the anode is subjected to an electrocatalytic ketone oxidation reaction to generate carboxylic acid. The COR reaction is used for replacing the oxygen evolution reaction (OER) of the anode in the prior art, so that energy consumption is reduced, the anode converts ketone into carboxylic acid with high added value, and the economic value of the anode product is improved.

The application discloses a bimetallic doped hierarchical porous carbon catalyst and a preparation method and application thereof. The bimetallic doped hierarchical porous carbon catalyst is prepared from two transition metal salts and specific biomass powder as raw materials through 160-180 DEG C hydrothermal carbonization and 200-500 DEG C calcination. The catalyst has simple components, is cheap, and has a simple preparation process. The catalyst can efficiently catalyze synthesis of 2,5-furan dicarboxylic acid from 5-hydroxymethylfurfural under mild conditions. The target product has high yield and simple separation, and has a good industrial application prospect.

Provided are a carbon catalyst, an electrode, and a battery that exhibit high catalytic activity while effectively avoiding problems caused by iron. The carbon catalyst has an L / La ratio of an average carbon network plane size L to a crystallite size La of 12 or more, the average carbon network plane size L being obtained by a temperature programmed desorption analysis capable of raising the temperature to 1600 DEG C, the crystallite size La is obtained from a diffraction peak near a diffraction angle (2 [theta]) of 43 DEG in an X-ray diffraction pattern obtained by powder X-ray diffraction using a CuK [alpha] ray, and the carbon catalyst has an iron content of 3000 ppm or less.

The invention relates to the field of organic synthesis, in particular to a synthetic method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The synthesis method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate comprises the following steps: mixing a material A, a material B, potassium carbonate, sodium iodide and a solvent, and reacting to obtain a material C; mixing the material C, the material D, triethylamine and a solvent, and reacting to obtain a material E; mixing the material E, ammonia water and a solvent, and reacting to obtain a material F; and mixing the material F, di-tert-butyl dicarbonate, a palladium carbon catalyst and a solvent, and carrying out a reaction to obtain the (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The process route is easy to operate and has no special dangerous reaction. Reaction materials are cheap and easy to obtain, and the prepared product is high in purity.

The invention discloses an iron phosphide catalyst for separating hydrogen isotopes from PEM electrolyzed water and a preparation method of the iron phosphide catalyst, and the preparation method of the iron phosphide catalyst comprises the following steps: step 1, adding ferric salt and carbon black into a solvent according to a certain proportion, dispersing, and evaporating the solvent to obtain a uniform mixture of the ferric salt and the carbon black; 2, heating the mixture obtained in the step 1 at a high temperature, and introducing hydrogen-argon mixed gas to obtain an intermediate product Fe / C; and 3, carrying out high-temperature phosphorization on Fe / C and red phosphorus under the protection of argon to obtain the iron phosphide catalyst. The non-noble metal iron phosphide catalyst is synthesized to replace a traditional noble metal platinum carbon catalyst, the cost is reduced, and the hydrogen isotope separation factor is remarkably increased to 6-8; the cathode iron phosphide catalyst disclosed by the invention is high in stability, the performance of the cathode iron phosphide catalyst is almost not attenuated after long-time electrolytic reaction, an electric pile can stably run for about more than 2000 hours under the condition that the current density is 0.5 A / cm < 2 >, and the cathode iron phosphide catalyst has a very high industrial application value.

The utility model belongs to the technical field of wastewater treatment, and particularly relates to an iron-carbon catalytic Fenton reaction tank. Comprising a horizontal tank body, two sides of the horizontal tank body are provided with a water inlet and a water outlet, square tanks are distributed in the horizontal tank body and are communicated with one another, the lower part of each square tank is provided with a precipitation hopper, and a joist is fixed above each precipitation hopper. According to the utility model, the plurality of square pools which are transversely arranged are connected in series, a plurality of modularized iron-carbon fillers can be placed in each pool body, and the plurality of square pools can be flexibly provided with adding points of iron-carbon and Fenton hydrogen peroxide, so that the oxidation-reduction capability of an iron-carbon primary battery and the strong oxidation capability of Fenton are fully coupled; meanwhile, the iron-carbon filler of a single module can be hoisted by a walking type electric hoist to check the hardening condition or be replaced, so that the operation flexibility is greatly improved, the problem of maintenance and replacement of iron-carbon scaling is solved, and in addition, on the basis of retaining the original biochemical pool structure, rapid transformation can be realized through the serial pool body.

The invention discloses a preparation method and application of a cobalt-nitrogen-doped mesoporous carbon catalyst, and belongs to the technical field of catalyst preparation, and the preparation method comprises the following steps: mixing and grinding glucose and an SBA-15 mesoporous molecular sieve, pyrolyzing in a nitrogen atmosphere, soaking the obtained product in hydrofluoric acid to remove an SBA-15 template, alternately centrifuging with water and ethanol to obtain a precipitate, and drying to obtain the cobalt-nitrogen-doped mesoporous carbon catalyst. Mesoporous carbon is obtained; the preparation method comprises the following steps: respectively dissolving phenanthroline and cobalt chloride hexahydrate in ethanol, and mixing to form a Co-phen solution; and soaking the obtained mesoporous carbon in a Co-phen solution, evaporating the solvent after soaking, grinding into powder, and carrying out heat treatment in a nitrogen atmosphere to obtain the cobalt-nitrogen doped mesoporous carbon catalyst. The cobalt-nitrogen-doped mesoporous carbon catalyst shows excellent oxygen reduction catalytic activity under the alkaline condition, the half-wave potential reaches 0.873 V and is close to a 4-electron transfer path, and the stability and methanol tolerance are superior to those of a commercial Pt / C catalyst.

The invention relates to the technical field of platinum-carbon catalysts, in particular to a preparation method of a platinum-carbon catalyst. The preparation method comprises the following steps: adding a carbon carrier into a polyol solvent, then adding an acidic dispersing aid, and dispersing to obtain a carbon carrier dispersion liquid; adding a platinum precursor solution into the carbon carrier dispersion liquid, and dispersing to obtain a mixed liquid; adding an alkaline regulator into the mixed solution, regulating the pH value of the system to be alkaline, and dispersing in an inert atmosphere to obtain a liquid mixture; heating the liquid mixture to carry out reduction reaction, then cooling, adjusting the pH value of the cooled product solution to be acidic, and carrying out post-treatment to obtain a solid substance; and heating the solid substance in an inert atmosphere for heat preservation, cooling and grinding to obtain the platinum-carbon catalyst. The carbon carrier dispersion liquid is prepared by jointly mixing the acidic dispersing aid, the carbon carrier and the polyol solvent, so that uniform dispersion and surface property optimization of the carbon carrier are realized, and a foundation is laid for subsequent uniform loading of platinum particles.

The application provides a continuous palladium-carbon hydrogenation reaction method, which is carried out according to the following steps: step one, mixing carbon catalyst with a solvent, and then injecting into the inside of a reactor; step two, connecting and starting a circulating pump to make the inside catalyst partially flow in a circulating mode; step three, injecting p-nitrotoluene and hydrogen, and carrying out heat exchange treatment on the whole reactor through a heat exchanger to keep the temperature stable during the reaction; and step four, discharging the reaction liquid and carrying out filtration treatment. The continuous palladium-carbon hydrogenation reaction method and equipment optimize the catalytic effect of the catalyst, improve the filtration efficiency, ensure that the raw material liquid and hydrogen enter the reactor, make the catalyst freely flow in the whole reaction area without being discharged from the reactor, continuously remove the product from the reactor, keep the temperature stable during the whole reaction process through the heat exchanger, and automatically stir the inside through the hydrogen injection.

A system and method for producing graphitic carbon, with the method including generating amorphous carbon by microwave pyrolysis of a natural gas feedstock in the presence of a carbon catalyst; treating the amorphous carbon with an oxidizing agent to introduce oxygen functionalities; and converting the treated amorphous carbon to graphitic carbon through electrochemical methods.

The invention discloses titanium-containing leather, which is prepared from a solvent-free PU (polyurethane) mixture prepared by mixing a component A and a component B through blade coating, baking, base cloth attaching and separation processes, and the component A comprises the following components in percentage by mass: 80-85% of polyether polyol, 12-15% of polyester polyol, 2-8% of nano titanium powder, 0.2-0.6% of a zinc-bismuth compound and 0.1-0.4% of a platinum-carbon catalyst. By adding nano titanium powder into a solvent-free PU mixture and combining a specific component ratio and a preparation process, the product has good high temperature resistance, super-strong corrosion resistance and antibacterial property and is suitable for various application scenes such as outdoors, home furnishing, fitness equipment and the like, the leather is endowed with excellent mechanical properties due to the super strength of titanium, the leather is suitable for lightweight design, and the cost is reduced. The leather material has the advantages of high temperature resistance, corrosion resistance, biocompatibility and the like, can be widely applied to the fields of new energy automobiles and aerospace, has excellent biocompatibility, and meets the requirements of scenes such as medical and physical therapy equipment, children products, dining table mats and the like on material safety.

The present application relates to the field of fossil resource recycling and fuel cell catalyst technology, and specifically to a method for preparing a platinum iron carbon catalyst using waste rubber powder, a platinum iron carbon catalyst and its application. The method of the present application comprises: subjecting a first waste rubber powder to pyrolysis treatment to obtain pyrolytic carbon; mixing the pyrolytic carbon with a metal salt, a chelating agent and water to obtain a first mixture; the metal salt comprises a platinum salt and an iron salt; heating the first mixture under stirring to obtain a sol; drying the sol and then calcining it to obtain a catalyst precursor; mixing a second waste rubber powder with a catalyst precursor to obtain a second mixture; subjecting the second mixture to microwave radiation treatment to obtain a platinum iron carbon catalyst. The technical solution of the present application provides a method for preparing a high-activity platinum carbon iron catalyst with a simple process and low cost, and also realizes the high-value recycling of waste rubber.

The invention discloses an iron-carbon catalytic material based on coal gasification slag as well as a preparation method and application of the iron-carbon catalytic material, and belongs to the technical field of industrial solid waste recycling. The preparation method comprises the following steps: adding dried coal gasification slag into an oxalic acid solution for extraction to obtain a suspension A; adding a reducing agent into the suspension A, carrying out precipitation reaction, and then carrying out solid-liquid separation to obtain a solid B; and sintering the solid B to obtain the composite material. The invention further discloses the iron-carbon catalytic material based on the coal gasification slag prepared by the method and application of the iron-carbon catalytic material. According to the method, the industrial solid waste coal gasification slag is used as a carrier, endogenous iron in the coal gasification slag is converted by adopting an acid leaching-reduction precipitation-roasting method, the iron-supported catalytic material with a stable structure and excellent performance is obtained, the process is green, the cost is low, the organic wastewater treatment capacity is excellent, and the practical value is relatively good.