1323 results about "Charring" patented technology

The invention provides a preparation system and method of porous electrode carbon. The system mainly comprises a two-section temperature-variable carbonization fluidized bed and an activation fluidized bed. According to the method, small-particle-size polymer particles are softened in the carbonization process and bonded with a large number of heat carrier particles to form composite particles, so that self bonding and excessive growth are avoided, and controllable carbonization is achieved in the two-section temperature-changing carbonization fluidized bed; and introducing the composite particles into an activation fluidized bed, carrying out high-temperature activation, and removing the heat carrier to obtain the porous carbon electrode carbon particles. According to the method, adhesion of polymer particles during carbonization is avoided, the problem of instability of superfine particle fluidization operation is solved, the links of grinding and heating and cooling are reduced, and the method has the advantages of being low in cost and capable of being continuously operated.

The invention provides a DOPO-HQ-based flame retardant, a preparation method and application thereof, a flame-retardant anti-dripping PET composite material and preparation thereof, and belongs to the technical field of flame retardants. The DOPO-HQ-based flame retardant provided by the invention contains an efficient phosphorus-based flame retardant DOPO structure, so that the composite material can be endowed with efficient flame-retardant self-extinguishing performance; besides, the DOPO-HQ-based flame retardant contains a triazine structure, is high in thermal stability and has excellent high-temperature carbonization capacity, so that a large number of carbon layers are generated in the combustion process of the composite material and cover the surface of a base material, and the effects of molten drop resistance and smoke suppression are achieved. The thermal performance of the flame-retardant PET composite material prepared from the DOPO-HQ-based flame retardant is similar to that of pure PET, and the flame-retardant PET composite material has the characteristics of high flame-retardant efficiency, no halogen, no molten drop, low smoke release amount and the like under the condition of a small addition amount (2-8wt%) (the current commercially available flame-retardant anti-molten drop addition amount is greater than or equal to 15wt%).

The invention relates to the technical field of cable coating materials, and particularly discloses a B1-grade cable material as well as a preparation method and application thereof. The cable material provided by the invention comprises matrix resin, a compatilizer, a flame retardant, a lubricant, an antioxidant, a smoke suppression charring agent, nano silicon dioxide and a silane coupling agent, the matrix resin is a mixture of linear low density polyethylene resin, an ethylene-octylene copolymer, metallocene polyethylene and an ethylene-vinyl acetate copolymer; the flame retardant is a mixture of magnesium hydroxide, aluminum hydroxide and hydrotalcite; the smoke suppression charring agent is a mixture of hydrous magnesium silicate and modified montmorillonite; the silane coupling agent is a mixture of vinyl silane and diamino silane. According to the cable material provided by the invention, the specific matrix resin, the flame retardant, the smoke suppression charring agent and the silane coupling agent are combined with auxiliaries such as the compatilizer, the lubricant, the antioxidant and the nano silicon dioxide to serve as raw materials, so that the flame-retardant effect of the B1-grade cable material is greatly improved.

The invention discloses an anthracite-based fast-charging carbon negative electrode material and a preparation method thereof.The preparation method comprises the steps that firstly, component separation is conducted on anthracite, meanwhile, the dual effects of reducing ash content and separating maceral components are achieved, then grading treatment is conducted by means of the density and hardness difference of vitrinite and inertinite, small-particle-size vitrinite is further sufficiently enriched, and the carbon negative electrode material is obtained. The content of vitrinite in the auxiliary material B is larger than or equal to 96 wt%, and then the auxiliary material B is subjected to hot air oxidation treatment to be subjected to a cross-linking reaction, so that the auxiliary material B is promoted to form a hard-carbon-like structure in the high-temperature carbonization process; meanwhile, collecting a mixed material containing 50-70wt% of vitrinite and 30-40wt% of inertinite as a main material A, and graphitizing the main material A; the graphitized main material A, the oxidized auxiliary material B and a binder are heated, fused and carbonized to form a graphite / hard-like carbon hybrid structure, and the anthracite-based fast-charging carbon negative electrode material with excellent electrochemical performance is obtained.

The invention provides a chloride ion permeation resistant grouting material and application thereof. The chloride ion permeation resistant grouting material is prepared from the following raw materials in parts by weight: 35 to 40 parts of cement, 45 to 50 parts of quartz sand, 10 to 15 parts of admixture, 0.3 to 0.5 part of expanding agent, 0.1 to 0.3 part of early strength agent, 0.1 to 0.3 part of water reducing agent and 5 to 8 parts of SiO2 / carbon composite aerogel, the SiO2 / carbon composite aerogel is prepared by the following steps: carrying out sol-gel reaction on phenols, formaldehyde and an amino POSS derivative under the action of a catalyst, and drying, carbonizing and grinding the gel. The molar ratio of the phenols to the formaldehyde to the amino POSS derivative to the catalyst is 1: (2.5-4): (0.1-0.3): (0.1-0.3); the composite aerogel has excellent adsorption performance on chloride ions, is used together with a specific expanding agent to inhibit the self-constriction of the grouting material, and has the effects of remarkably improving the chloride ion penetration resistance and compensating the constriction of the grouting material.

The invention discloses a preparation method for preparing a biomass porous carbon material through high-temperature carbonization of molten salt and application of the biomass porous carbon material, and belongs to the technical field of synthesis of inorganic functional materials. According to the technical scheme, the method is characterized in that sodium chloride and potassium chloride are mixed into mixed salt according to different proportions, then the mixed salt is mixed with enteromorpha biomass according to a certain proportion, the mixture is placed in a porcelain crucible, the mixed salt is added for covering, the porcelain crucible is placed in a muffle furnace to be heated and carbonized, and the porous biomass carbon material is obtained after water washing and drying. The enteromorpha biomass is selected as the raw material, the operation is simple and controllable, the cost is low, batch production can be realized, and the prepared novel porous biomass carbon material has a complex porous structure, a large specific surface area, a very good catalytic effect, strong adsorption capacity and good conductivity, and shows excellent performance when being applied to the field of advanced oxidation.

The invention discloses a preparation method of a sludge biochar material and application of the sludge biochar material in urban sewage treatment. The method comprises the following steps: 1, mixing sludge discharged from an aerobic tank with fly ash, and carrying out anaerobic carbonization treatment to obtain sludge biochar; 2, loading manganese element modified sludge biochar by using a chemical precipitation method; 3, conditioning the sludge, adding cationic polyacrylamide and potassium ferrate, carrying out secondary stirring treatment, and then carrying out pyrolysis; 4, adding aluminum hydroxide and carborane to carry out segmented heat treatment, and carrying out high-temperature heat treatment with copper hydroxide to further improve the pore structure; 5, the final sludge modified biochar material is obtained through ozone activation. The sludge biochar material prepared by the invention has a developed pore structure and high porosity, is especially suitable for constructed wetland devices, and can greatly improve the removal performance of COD, TN and TP in water. The material is suitable for urban sewage treatment, and has important economic value and social significance.

The invention belongs to the technical field of activated carbon preparation, and relates to sulfur-doped activated carbon and a preparation method thereof. The method comprises the following steps: firstly, adding a cleaned and crushed biomass raw material into an aqueous solution of a sulfur-containing dopant, carrying out dipping treatment, separating, drying, and carrying out high-temperature carbonization in an oxygen-free environment to obtain a sulfur-doped carbonized material; and crushing the sulfur-doped carbonized material into particles, and activating at high temperature in a carbon dioxide atmosphere to obtain the sulfur-doped activated carbon particles. The sulfur-doped active carbon particles prepared by utilizing a sulfur in-situ doping and physical activation combined method are stable in structure, the active carbon with rich mesopore and micropore structures can be obtained by doping a small amount of sulfur, the surface hydrophobicity of the active carbon is improved, meanwhile, the adsorption sites on the surface are increased, and the adsorption performance on hydrophobic organic pollutants is remarkably improved. The method is simple in process, low in cost, environment-friendly and easy for commercialized application.

The invention discloses a device and method for preparing biochar from corncobs, and belongs to the technical field of biochar preparation, the device comprises a machine base, a frame is fixed outside the machine base, an outer cylinder is horizontally fixed on one side of the machine base, and the outer cylinder is fixedly connected with the frame; the crushing seat is arranged above the outer cylinder; the combustion system is arranged on one side of the outer barrel, and the combustion system is externally connected with a hot gas booster fan; the sealing end cover is fixed in the outer cylinder body; the carbonization cylinder is rotationally mounted on the machine base, and one end of the carbonization cylinder is coaxially and rotationally connected with the sealing end cover; the heat control unit is arranged in the annular cavity of the carbonization cylinder; the material guide channel is arranged on the sealing end cover; the filter material unit is fixed in the carbonization cylinder; according to the device, a scrap mixture can be graded according to the particle size, primary carbonization of the scrap mixture is achieved, then the scrap mixture is remixed and then subjected to high-temperature pyrolysis carbonization, and the purity and quality of biochar preparation are improved.

The invention provides a method for preparing beta-SiC containing a whisker structure from rice husks, and belongs to the field of comprehensive utilization of resources and inorganic non-metallic materials. The method comprises the following steps: carbonizing rice hulls in a protective atmosphere to obtain rice hull ash, removing impurities from the rice hull ash, and fully mixing the rice hull ash with NaCl and H3BO3 to obtain a rice hull ash mixture; and putting the two groups of rice hull ash mixtures into the same atmosphere furnace, introducing shielding gas, enabling the gas to sequentially pass through the H3BO3 mixture and the NaCl mixture in sequence, heating to 1300-1600 DEG C at a heating rate of 2-10 DEG C / min, performing high-temperature treatment for 1-5 hours, washing and drying the obtained solid, and firing in air to obtain beta-SiC. The silicon carbide product with high commercial value is prepared from the cheap rice hulls, hydrofluoric acid and other high-toxicity and high-corrosivity raw materials are not needed in the preparation process, the heat treatment temperature is low, large-scale production can be easily achieved, the problems that an existing industrial carbon thermal reduction method is large in process pollution and high in energy consumption can be solved, the production cost is reduced, and the method is suitable for industrial production. And industrial popularization and application are facilitated.

The invention discloses a sludge treatment process based on an ultrasonic hydrothermal carbonization technology. The sludge treatment process comprises the following steps: intercepting and filtering out large impurities in biological sludge; carrying out solid-liquid separation on the intercepted sludge, and carrying out concentration treatment on the sludge to obtain concentrated sludge; discharging the concentrated sludge into an ultrasonic hydrothermal carbonization reaction kettle, adding water to adjust the concentration of the concentrated sludge to 10-20%, starting an ultrasonic generator, adding a composite catalyst when the temperature in the ultrasonic hydrothermal carbonization reaction kettle reaches 50 DEG C and the pressure reaches 0.8 Mpa, and converting to generate carbon slurry; wherein the composite catalyst is prepared from ferric oxide, platinum and activated carbon according to a preset proportion; carrying out primary solid-liquid separation on the carbonaceous slurry, separating solid-phase carbon mud and liquid-phase carbon mud in the sludge suspension, and carrying out filter pressing on the solid-phase carbon mud to obtain a mud cake; and drying the mud cake, and granulating in a granulator to obtain the hydrothermal carbon granules. According to the sludge treatment process based on the ultrasonic hydrothermal carbonization technology, the sludge treatment difficulty can be effectively reduced, and the sludge can be quickly treated.

The invention belongs to the technical field of activated carbon, and particularly relates to a preparation method and application of activated carbon for organic wastewater treatment. The preparation method of the activated carbon comprises the following steps: (1) mixing pulverized coal, biomass powder and a binder to obtain mixed powder; and (2) carbonizing and activating the mixed powder to obtain the activated carbon. The preparation method has the beneficial effects that biomass is adopted as a main raw material for preparation of the activated carbon, the problems of resource waste and environmental pollution caused by discarding and burning of the biomass are solved, and the obtained activated carbon is high in specific surface area, rich in pores, relatively large in average pore size, developed in mesopores, low in floating rate and high in adsorption capacity. The adsorbent is suitable for adsorbing macromolecular pollutants in organic wastewater, has relatively high selective adsorption capacity on organic macromolecules, and can meet the treatment requirements of industrial organic wastewater. The adsorbent can be used for adsorbing and purifying organic wastewater in industries such as chemical industry, food and medicine.

The invention discloses a superconducting carbon black co-production method based on directional refining of catalytic slurry oil and a product thereof, and belongs to the technical field of carbon black preparation, and the method comprises the following steps: mixing the catalytic slurry oil and catalytic circulating oil to obtain mixed slurry oil, and adding a deliming agent for settling separation to obtain purified slurry oil; carrying out continuous solvent extraction on the obtained purified oil slurry to respectively obtain an aromatic component and a heavy component; carrying out thermal polycondensation reaction on the obtained aromatic component in a magnetic field environment in the presence of a catalyst and a cross-linking agent, and then carrying out supercritical fluid extraction to obtain spinnable mesophase pitch; carrying out slurry reactor hydrogenation deconstruction on the obtained heavy component to obtain stable micromolecular carbon black raw oil, mixing the carbon black raw oil with a nitrogen source and a template precursor, carbonizing, and carrying out acid pickling to obtain the superconducting carbon black; through a heavy oil slurry reactor hydrogenation deconstruction'doping-template 'synergistic carbonization strategy, the superconductive carbon black with nitrogen / phosphorus co-doped and developed hierarchical porous structure is constructed in situ by a one-step method.

The invention discloses a method for preparing activated carbon from mariculture bottom mud doped with biomass and application. The preparation method of the activated carbon comprises the following steps: desalting the mariculture bottom mud to obtain low-salt bottom mud particles; uniformly mixing the low-salt sediment particles with biomass powder according to a ratio of 1: (3-5), and carrying out pyrolysis carbonization at 350-450 DEG C in a nitrogen atmosphere to obtain a pre-carbonized biomass material; and uniformly mixing the pre-carbonized biomass material and an activator according to a mass ratio of 1: (4-5), placing the mixture in a ball milling tank, carrying out mechanochemical ball milling, transferring the ball-milled mixture to a tubular furnace, and carrying out high-temperature activation at 800-1000 DEG C in a nitrogen atmosphere to obtain the activated carbon. The material has a hierarchical porous structure and a relatively high specific surface area, can adsorb and remove various pollutants, particularly has relatively high adsorption capacity for VOCs and CO2, can be produced in batches, is low in cost, wide in applicable temperature range and long in service life, and has a good application prospect.

The invention discloses a silicon-tin-carbon composite material as well as a preparation method and application thereof, and the silicon-tin-carbon composite material sequentially comprises a porous silicon core, a first coating layer and a second coating layer from inside to outside, the first coating layer comprises a porous carbon material and tin located in pores of the porous carbon material, and the second coating layer comprises an amorphous carbon coating layer; pores of the porous silicon core contain tin and a porous carbon material. Tin of the silicon-tin-carbon composite material is located in pores of the porous carbon layer, so that the problem of tin expansion and the problem of tin agglomeration in the subsequent high-temperature carbonization process are buffered; meanwhile, a porous composite layer formed by tin and a porous carbon material is compounded to the surface and pores of the porous silicon core, so that the surface defects of porous silicon are repaired, and the expansion of silicon is limited to a certain extent; and on one hand, the outermost coated carbon layer can inhibit the volume expansion of silicon and tin in the charging and discharging process and increase the conductivity of the composite material.

The invention discloses a silane modified polyether flame-retardant adhesive and a preparation process thereof, and relates to the technical field of sealants, a phosphate plasticizer is selected as a plasticizer, a flame-retardant filler is selected from any one or two of aluminum hydroxide and magnesium hydroxide, and silane modified polyether resin is added as flame-retardant resin. All the components are compounded and mixed to obtain the modified flame-retardant adhesive, and the flame-retardant resin, the flame-retardant filler and the plasticizer have a good synergistic flame-retardant effect, so that the flame-retardant adhesive achieves a good flame-retardant effect. According to the invention, mercaptoacetic acid modified silicon resin microspheres are prepared, then the mercaptoacetic acid modified silicon resin microspheres react with lead acetate and zinc acetate by utilizing the adsorbability of sulfydryl to prepare modified silicon resin, and the silicon resin is an anti-dripping flame retardant and can form a stable and compact carbon layer structure after combustion; lead acetate and zinc acetate are beneficial to dehydrogenation and charring in the combustion process, so that the flame retardant property is further improved.

The invention belongs to the technical field of high polymer materials, and provides a high-flame-retardance degradable bio-based high polymer material and a preparation method thereof. Based on a degradable bio-based material polylactic acid, a bio-based flame retardant is introduced to realize the efficient flame retardant property of the material, and the preparation method comprises the following steps: firstly, carrying out esterification reaction on L-lactic acid and methacrylic acid under the action of an acid catalyst to obtain methacrylate lactate; and then reacting with 2-(2-ethoxyethoxy) ethanol to generate an ester compound with a long-chain structure and an unsaturated group. Then, a flame retardant containing a phosphaphenanthrene group and an ester compound are subjected to an addition reaction to prepare a bio-based flame retardant with a flame-retardant effect, so that the material has a relatively good carbonization effect and a relatively good capability of inhibiting flame spreading during combustion; polylactic acid, the bio-based flame retardant, the antioxidant, the lubricant, the ultraviolet light absorber and the modified compatilizer are mixed, and finally the biodegradable bio-based high polymer material with excellent flame retardance is obtained.

The invention belongs to the technical field of underground hydrogen storage, and particularly relates to a method for improving underground hydrogen storage capacity by stabilizing hydrogen foam through a porous carbon material, which comprises the following steps: step 1, preparing a hydrophobic modified porous carbon material: preparing the porous carbon material by using biomass waste as a raw material through a carbonization-activation process; carrying out hydrophobic modification treatment on the porous carbon material to enable the water contact angle of the material to reach more than 90 degrees; step 2, preparing a surfactant solution; step 3, preparing a porous carbon-surfactant composite system; and fourthly, hydrogen foam is generated and injected, wherein hydrogen and the porous carbon-surfactant composite system are fully mixed according to the gas-liquid volume ratio of 1: 1-10: 1, and then the mixture is injected into the stratum. By means of the method, the stability of hydrogen foam can be remarkably improved, the hydrogen storage efficiency and the hydrogen recovery rate are improved, and therefore the underground hydrogen storage amount is greatly increased.

Natural renewable resources are used as raw materials, efficient and environment-friendly catalytic performance is achieved through multi-stage optimization, coconut shells, fruit shells, reeds and wood chips are used as base materials in the process, a channel template is introduced after fine crushing, a graded pore structure is constructed, and the mercury-free catalyst is prepared. Dynamic extrusion forming and program temperature control carbonization-activation technologies are adopted to form an active carbon skeleton with a high specific surface area, a pulsating pressure impregnation system is innovatively designed, ultrasonic vibration is combined to strengthen copper chloride solution permeation, deep and uniform loading of active components is realized, and a mixed pickling process is developed in a matched manner. Metal impurities are efficiently removed through the synergistic effect of hydrochloric acid and citric acid, and the obtained catalyst has three-dimensional through pore channels and high-activity component dispersity, can replace a traditional mercury-containing catalyst to be applied to the fields of vinyl chloride synthesis and the like, remarkably reduces the risk of environmental pollution, improves the reaction selectivity and prolongs the service life of the catalyst, and is suitable for industrial production. And a technical support is provided for green transformation of the chemical industry.

The invention relates to the technical field of nylon, and discloses flame-retardant fireproof high-temperature-resistant nylon and a preparation method thereof. According to the invention, nylon 6, a montmorillonite-copper complex flame retardant and the like are extruded and granulated in a twin-screw extruder to obtain the flame-retardant fireproof high-temperature-resistant nylon. After surface organic modification, montmorillonite has good compatibility with nylon 6, the tensile strength of the material is increased, the flame retardant contains phosphate groups and more nitrogen-containing ureido and phenanthroline structures to form a nitrogen-phosphorus flame retardant, and meanwhile, the flame retardant contains a salicylic acid-phenanthroline-copper complex structure to catalyze charring of a nylon matrix at high temperature, so that the flame retardant has excellent flame retardancy. The flame retardance of the nylon material is remarkably improved, the UL94 grade reaches the V0 grade, the limit oxygen index is increased, the residual carbon amount at high temperature is increased, and the high-temperature resistance of the material is improved.

The invention discloses a device and a method for preparing a multi-component product by pyrolyzing multi-source organic solid waste, which can realize one-step preparation of biomass activated carbon and can recycle fuel oil generated by pyrolyzing the organic solid waste. Pyrolysis gas and tar generated by carbonization and pyrolysis of biomass, rubber and plastic and other multi-source organic solid waste are condensed through a condenser, the pyrolysis gas enters a combustor to be fully combusted, when the pyrolysis gas is insufficient, a natural gas valve is adjusted, part of natural gas is added for coupling combustion, and combusted flue gas provides energy for an activation furnace, a pyrolysis furnace and a carbonization furnace in sequence; subsequently, tail gas discharged from a gas outlet of the carbonization furnace exchanges heat with water through a heat exchanger, and the water is gasified into water vapor from liquid and enters the activation furnace to provide an activating agent for the biomass activation process; tar enters a fuel oil tank after being condensed, and can be used as emergency energy when fuel gas is insufficient to be atomized and sprayed into a combustor for combustion to provide heat energy. According to the device, the whole technological process of carbonizing the biomass precursor and then activating the biomass precursor with water vapor is realized, and meanwhile, the high-value fuel oil is obtained.

The invention discloses a comprehensive utilization method and system for high-value organic wastes and adjustable target products, and belongs to the technical field of resource utilization of organic wastes. The system comprises gasification and carbonization equipment, an afterburning type waste heat boiler, a gas generator set, steam explosion equipment, activated carbon preparation equipment, anaerobic fermentation equipment, a methanol preparation system, flue gas waste heat recycling equipment, an ammonia gas preparation system, biomass charcoal pure oxygen combustion equipment, a green hydrogen preparation system and a biodiesel preparation system. The three technologies of gasification carbonization, steam explosion and anaerobic fermentation are coupled, the treatment efficiency is greatly improved, deep resource utilization of organic solid waste and organic wastewater is achieved through the same set of equipment, the equipment investment is reduced, and the occupied area is reduced; biomass green electric power generated by the gas generator set is used for splitting water to produce hydrogen and oxygen; and secondary gradient utilization and material reutilization of the waste heat of the flue gas are realized.

The attapulgite (HNTs) is modified by using the diethyl aluminum hypophosphite (ADP), so that the flame retardant property of the HNTs and the compatibility of the HNTs and a polypropylene matrix can be remarkably improved. Through thermal modification, the treated surfaces of the HNTs can effectively adsorb phosphorus elements, and ADP can form phosphate groups on the surfaces of the HNTs to enhance the flame inhibition effect of the HNTs. Due to the adsorption effect, the modified HNTs can form a carbonized layer more quickly at high temperature, flame spreading is prevented, and the flammability of the material in a fire disaster is reduced. The dispersity and compatibility of the modified HNTs in a polypropylene matrix are remarkably improved, the mechanical property and thermal stability of the composite material are enhanced, and the modification cost is effectively reduced by optimizing the modification method. Compared with a traditional high-content inorganic flame retardant, the ADP modified HNTs has the advantages that the flame retardant property is improved, and meanwhile, the requirement for using other expensive flame retardants is reduced, so that the cost of the composite material is effectively reduced.

The invention belongs to the technical field of carbon materials, and provides tin-copper co-doped porous carbon and a preparation method and application thereof.The preparation method comprises the steps that A, raw materials are mixed, a hydrochloric acid solution is added to adjust the pH of a system to 5-6, stirring and cooling are conducted to the room temperature, then standing is conducted to form wet gel, freeze drying is conducted, and gel is obtained; wherein the raw materials comprise 0.8 g to 1.2 g of copper acetylacetonate, 4 g to 6 g of 2-aminobenzaldehyde, 4 g to 6 g of melamine phosphate, 4 g to 6 g of resorcinol and 8 ml to 12 ml of a formaldehyde solution with the concentration being 30 wt%; b, carbonizing the gel in inert protective gas to obtain copper-doped porous carbon; c, tin powder and the copper-doped porous carbon obtained in the step B are subjected to ball milling and mixing according to the mass ratio of 2: (7-12), then the mixture is placed in inert protective gas to be carbonized, and the tin-copper co-doped porous carbon is obtained. The prepared porous carbon material is high in CO2 electrocatalytic activity and has a wide application prospect.

The invention discloses a sulfur-doped carbon-based composite wave-absorbing material as well as a preparation method and application thereof. Sulfonated resin is used as a carbon source, is impregnated with a salt solution of iron, nickel, cobalt and other metals, and then is subjected to high-temperature carbonization in an inert atmosphere, so that the sulfur-doped carbon-based composite wave-absorbing material is prepared. The content of the magnetic components in the composite wave-absorbing material can be adjusted by adjusting the concentration of the metal salt solution, and the electromagnetic wave absorption performance can be further adjusted and controlled in a wide range. The raw material components are stable, the cost is low, and the preparation method is simple and suitable for industrial production; sulfur-containing sulfonated resin is used, after heat treatment, a defect and a functional group introduced by sulfur doping serve as a dipole center, dipole polarization is induced under a high-frequency electromagnetic field, and the dielectric loss capacity of the material can be improved; the composite wave-absorbing material has multiple electromagnetic loss mechanisms, and is wide in effective absorption frequency band, light in weight, thin in thickness and high in wave-absorbing performance.

The invention provides a preparation method for preparing porous carbon based on an aerogel method, the porous carbon and application of the porous carbon, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: mixing polyhydroxy phenol, aromatic aldehyde, acrylamide, graphene oxide and lithium salt according to a mass ratio of 100: (50-200): (5-30): (1-5): (1-5), carrying out hydrothermal reaction at 100-200 DEG C for 1-6 hours, and freeze-drying at-40 DEG C to obtain a hydrogel precursor; and carbonizing the precursor in organic heteroatom gas at 500-800 DEG C, mixing the intermediate with alkali according to the ratio of 100: (100-500), activating at 900-1100 DEG C, pickling and drying to obtain the porous carbon. The conductivity of the product is improved by means of graphene, lithium salt and heteroatoms, and the aerogel method obtains large aperture, has the characteristics of low impedance, high first efficiency and small charge-discharge expansion, and can be efficiently applied to silicon-carbon materials.

The invention discloses a porous carbon material and a preparation method and application thereof, the method comprises an activation step of activating a carbonized material, and the activation step comprises placing the carbonized material in a product channel of a split-phase rotary furnace, a basic activation area, a chambering activation area and a supplementary activation area which are sequentially arranged along the advancing direction of the carbonized material are formed in the split-phase product channel; the activation step comprises the step of activating for 80-200 minutes at the temperature of 800-850 DEG C in a basic activation area; activating for 80-120 minutes at the temperature of 850-900 DEG C in a reaming activation area, and then activating for 80-120 minutes at the temperature of 900-850 DEG C; and activating for 60-120 minutes at the temperature of 850-750 DEG C in a supplementary activation area. The porous carbon material obtained by adopting the preparation method has micropores with larger specific surface area and smaller pore diameter, the application range of the porous carbon material is expanded, and the performance of downstream products is favorably improved.

The present disclosure relates to the technical field of carbon materials, and particularly relates to a preparation method for a carbonaceous material, the carbonaceous material and a use. A carbonized material formed by a biomass material is sintered at a high temperature in a chlorodifluoromethane atmosphere, and in this process, chlorodifluoromethane is decomposed to generate tetrafluoroethene and hydrogen chloride gas, tetrafluoroethylene can generate octafluorocyclobutane, and octafluorocyclobutane can react with silicon dioxide to generate silicon tetrafluoride, carbon dioxide and carbon; and the generated hydrogen chloride gas can react with metal impurities at a high temperature to generate metal chloride. By means of the preparation method provided by the present disclosure, metal impurities such as iron and calcium can be removed while silicon dioxide is removed, acid pickling and alkali washing processes are not needed, and waste liquid treatment is not involved.

The invention discloses ferric chloride and calcium chloride combined modified biochar, a preparation method thereof and a method for enhancing phosphate adsorption, and the preparation method comprises the following steps: (1) mixing and dipping original biochar with a ferric chloride and calcium chloride solution, and fully shaking and shaking up the mixed solution; (2) carrying out suction filtration on the mixed solution to remove supernate, and drying residual solid substances to obtain a modified biochar material; and (3) putting the modified biochar material into a tubular furnace, continuously introducing nitrogen into the tubular furnace, carrying out high-temperature carbonization at 600 + / -5 DEG C for 2 + / -0.1 h, cooling the tubular furnace to room temperature, taking out, cleaning, and drying to obtain the biochar jointly modified by ferric chloride and calcium chloride. Adsorption active sites of the biochar can be increased after joint modification of ferric chloride and calcium chloride, the specific surface area of the biochar is increased, the structure of the biochar is looser, and the adsorption effect is enhanced.

The invention relates to the technical field of soil heavy metal pollution remediation, and discloses biochar loaded nano-iron as well as a preparation method and application thereof. The invention relates to a preparation method of biochar-loaded nano-iron, which comprises the following steps: by taking biomass as a raw material, modifying, carbonizing and activating to obtain modified biochar, then putting the modified biochar into a solution containing ferric ions to load iron ions to obtain biochar loaded with the iron ions, and drying the biochar loaded with the iron ions to obtain the biochar loaded with the nano-iron. And finally, reducing the iron ions in the biochar loaded with the iron ions by using a plant water extract to obtain the biochar loaded nano-iron. The biochar-loaded nano-iron provided by the invention is not easy to agglomerate, good in stability and high in heavy metal removal rate, the heavy metal removal rate can reach 73.1% within 15 days, and the biochar-loaded nano-iron can be widely applied to remediation of heavy metal pollution of soil.