770 results about "Charring" patented technology

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 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 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 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 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 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 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 preparation method comprises the following steps: shredding a light fibrous plant raw material which is difficult to process to 1-5mm, adding a certain amount of lignin, fully mixing with diammonium hydrogen phosphate or ammonium dihydrogen phosphate, carrying out hot press molding at 130-190 DEG C by using a pelletizer to prepare heavy particles with the particle size of 8-10mm, and carrying out high-temperature sintering to obtain the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material, thereby obtaining the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material and the columnar activated carbon for desulfurization and denitrification of the fibrous plant raw material. Heating the heavy particles to 400-700 DEG C in a rotary furnace, carbonizing for 1-3 hours, introducing a mixed gas of water vapor and air, and carrying out segmented activation at 850-950 DEG C-1000 DEG C to prepare high-quality activated carbon with the iodine value of more than or equal to 950 mg / g; crushing activated carbon to 140-325 meshes, mixing the crushed activated carbon with the composite glue solution, adding a proper amount of water for kneading, and forming the mixture into 2-8mm columnar particles by a hydraulic granulator or a screw extrusion granulator; through drying at the temperature of 100-300 DEG C and heat treatment at the temperature of 700-900 DEG C in a nitrogen, water vapor or anaerobic atmosphere, a basic group generated by the binder in the heat treatment has a very strong chemical adsorption effect on acid gas, later-stage modification is not needed, and excellent desulfurization and denitrification performance is achieved.

The invention relates to the technical field of adsorbents, in particular to a modified mineral-based composite active coke adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: respectively crushing, sieving and drying an active coke raw material and a modified clay mineral, mixing according to a ratio, adding a binder, fully kneading and uniformly mixing, carrying out compression molding, drying, carbonizing and activating to obtain the modified mineral-based composite active coke adsorbent. The modified clay mineral is prepared by dipping a natural clay mineral in a modifier solution, washing, carrying out suction filtration and drying; and the modifier is one or more of acid, transition metal salt, acidic salt or calcium salt. In the preparation process of the active coke material provided by the invention, the modified clay mineral has the effects of improving the yield of an active coke product, enhancing the adsorption performance of the active coke and improving the pore diameter of the active coke; the modified mineral-based composite active coke adsorbent disclosed by the invention has the characteristics of rich pore structure, large adsorption capacity, high efficiency, rich surface functional groups and the like.

The invention belongs to the technical field of high polymer materials, and particularly discloses a lignin-based charring agent containing silicon and nitrogen flame-retardant elements and an imine structure for flame-retardant polylactic acid and a preparation method of the lignin-based charring agent. The flame-retardant polylactic acid is prepared from the following components in parts by weight: 90 to 97 parts of polylactic acid, 1 to 3.33 parts of lignin-based charring agent and 2 to 6.67 parts of ammonium polyphosphate. The bio-based charring agent disclosed by the invention contains silicon and nitrogen flame-retardant elements and an imine structure, has remarkable charring and flame-retardant effects, is high in charring capacity, and can endow the PLA with relatively good flame-retardant property by compounding with ammonium polyphosphate and adding 1% of the lignin-based charring agent; the lignin and vanillin which are used as main raw materials for synthesizing the charring agent are bio-based sources and are easy to obtain, the production process is simple, industrial production is easy, the preparation process is non-toxic and environment-friendly, the dependence of charring agent synthesis on petroleum-based raw materials can be effectively relieved, and the sustainable development trend of materials is met.

The invention relates to a double-circulation symmetrical airflow type straw flash carbonization device which comprises a feeding mechanism, a conveying mechanism, a rotary carbonization furnace, a carbonization separator, a carbon outlet separator, a pyrolysis gas channel, a combustion furnace and a combustion separator, the rotary carbonization furnace is of a double-layer jacket type structure, and the design of an outer-layer high-temperature heating inner wall and an inner-layer tangential rotational flow inner cavity is adopted; the raw materials form a thin layer under the action of centrifugal force to finish flash carbonization. According to the invention, the combustion furnace and the rotary carbonization furnace which are symmetrically arranged, and the carbonization separator and the combustion separator are adopted, so that cyclic re-carbonization and graded collection of carbonized products, split-flow utilization of pyrolysis gas and stepped recovery of high-temperature flue gas are realized; the problems that a traditional device is low in continuous degree, high in energy consumption and insufficient in product purity are solved, and the straw carbonization efficiency and the resource utilization rate are remarkably improved.

The invention provides a method for preparing pigment carbon black from waste tires, which solves the problems of low product quality and resource waste in traditional waste tire treatment by optimizing a synergistic process of thermal cracking, oxidation modification, pyrolysis oil carbonization and tail gas closed-loop utilization. The method comprises the following specific steps: crushing the waste tires into rubber powder, and performing thermal cracking to generate a carbon residue and oil-gas mixture; carrying out magnetic separation, grinding and oxidation treatment on the carbon residues to generate oxidized carbon black; fractionating and refining the pyrolysis oil, mixing with carbon black oil, and spraying into a carbon black reaction furnace to generate carbon black; and finally, mixing and granulating the two parts of carbon black to prepare the pigment carbon black. The specific surface area of the prepared pigment carbon black reaches 80-200 m < 2 > / g, the coloring strength is 80-120%, the ash content is smaller than or equal to 18%, and the pigment carbon black can be applied to color master batches and black plastic products by limiting thermal cracking conditions, oxidation conditions and the ratio of mixed oil. The tail gas is recycled after being dedusted and purified, so that efficient cyclic utilization of resources is realized.

The invention discloses a tail gas centralized treatment device and method in coconut shell activated carbon production, and relates to the technical field of tail gas treatment.The tail gas centralized treatment device in coconut shell activated carbon production comprises a base, a carbonizing machine is fixedly installed at the top of the base, and a heat exchange machine is fixedly installed at the top of the base; the tail gas centralized treatment device comprises a base, a heat exchanger is fixedly mounted at the top of the base, a gas conveying pipe fixedly penetrates through the bottom of the heat exchanger, a treatment barrel is fixedly mounted at the top of the base, and a cyclone separator is fixedly mounted at the top of the treatment barrel. At the moment, the cyclone separator is started and separates out large-particle impurities in the tail gas, so that equipment is prevented from being blocked and abraded, the service life is prolonged, the load on equipment parts can be reduced, the overall purification efficiency is improved, subsequent treatment is facilitated, and the situation that the large-particle impurities wrap reactants to affect the solid-liquid separation efficiency is avoided.

The invention discloses a flexible intumescent fireproof coating and a preparation method and application thereof, and relates to the technical field of coatings, the flexible intumescent fireproof coating comprises the following components by weight: 30-60 parts of organosilicon modified epoxy resin, 15-30 parts of a flame retardant, 5-15 parts of a charring agent, 10-20 parts of a foaming agent, 5-20 parts of a flame retardant toughening agent, 5-10 parts of a fireproof filler, and 5-15 parts of a diluent. 2-5 parts of a defoaming agent, 1-5 parts of a dispersing agent and 30-50 parts of a curing agent. Through the synergistic effect of the organic silicon modified epoxy resin and the specific flame-retardant toughening agent and in combination with a compound system of silane modified ammonium polyphosphate and the triazine charring agent, the fireproof and heat-insulating properties and flexibility of the coating are greatly improved, and the application of the coating on different matrix structures is expanded; the dual requirements on fireproof performance and flexibility in the fields of aerospace, power batteries and the like are met.

The invention discloses a production process of activated carbon with efficient adsorption performance, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: by taking biomass as a raw material, compounding the biomass with a eutectic salt system consisting of zinc chloride and potassium chloride, a nitrogen source precursor and a sacrificial cation source to obtain a homogeneous reaction precursor; the key point is that the precursor is subjected to programmed variable-pressure pyrolysis treatment under the condition that the temperature is far lower than the traditional activation temperature. According to the process, deep infiltration of molten salt is achieved through initial pressurization operation, and then reaction gas is guided to escape orderly through a later programmed pressure reduction process. Through collaborative innovation of the composition and the process, multiple steps of carbonization, activation, pore forming, in-situ functionalization and the like are integrated in a single low-temperature reaction unit, and the technical problems that a traditional method is high in energy consumption and long in flow, and the physical structure and surface chemistry of a material are difficult to synchronously regulate and control are solved.

The invention belongs to the technical field of high polymer materials, and discloses a bio-based spiral macromolecular flame retardant as well as a preparation method and application thereof. The novel bio-based spiral macromolecular flame retardant PDVPA is successfully prepared on the basis of common industrial raw materials in combination with bio-based renewable vanillin, and the novel bio-based spiral macromolecular flame retardant PDVPA is applied to preparation of a flame-retardant TPEE composite material by adopting a melt blending process. The phosphorus element in the PDVPA molecular structure is used as a main flame-retardant functional group, and can promote the charring of the spiral structure of the PDVPA molecular structure; meanwhile, an imine bond can be subjected to a trimerization reaction under a high-temperature condition to form a cross-linked network structure, so that the molten drop phenomenon during TPEE combustion is effectively inhibited. The invention provides a new way for improving the safety performance of the high polymer material and reducing the dependence on fossil resources.

The invention discloses a method and system for producing regenerated activated carbon based on carbonized material activation heat supply coupling, and relates to the technical field of activated carbon. Comprising the following steps: adding dried waste activated carbon and a preheated carbonized material into a vertical multi-section activation furnace to obtain an activated product; the tail gas of the vertical multi-section activation furnace is combusted and fed into a waste heat boiler to produce water vapor; heating is stopped after the vertical multi-section activation furnace is heated to the activation temperature, and then activation self-sustaining heat balance is formed by means of the following heat sources: combustion heat release of volatile matter in a carbonized material, combustion heat release of H2 / CO generated by water vapor activation reaction, oxidation combustion heat supply of waste activated carbon adsorbate and combustion heat supply of non-condensable combustible gas generated by dehydration of waste activated carbon dry waste gas; the carbonized material and the waste activated carbon enter the same activation furnace device in a synergistic compatibility manner, the carbonized material and the waste activated carbon interact with each other, the activation effect is improved, and the vertical multi-section activation furnace can realize self-sustaining heat balance, so that the energy cost is greatly reduced.

The invention relates to the technical field of preparation of activated carbon materials, in particular to a coupling activation preparation method and application of a biomass-derived porous carbon material. According to the coupling activation preparation method of the biomass-derived porous carbon material, the biomass-derived porous carbon material is prepared from a biomass raw material through the steps of fermentation, acid leaching reinforcement, hydrothermal carbonization, activation and acid pickling impurity removal. The biomass-derived porous activated carbon material prepared by the above steps is detected by a scanning electron microscope, and the biomass-derived porous activated carbon material is in a porous layer shape and has rich micropore and mesoporous structures; through electrochemical test experiment detection, the biomass derived porous activated carbon material has excellent capacitive performance, and when the current density is 0.5 A / g, the specific capacity value range is 200-400 F / g; the material also has good stability, the biomass derived porous activated carbon material is assembled into a symmetric supercapacitor, and after 10000 circles of stability tests, the retention rate of the specific capacitance of the symmetric supercapacitor can be maintained at about 96.4%.

The invention relates to the technical field of modified carbon graphite materials, and particularly discloses an antioxidant modified carbon graphite material and a preparation method thereof, the antioxidant modified carbon graphite material comprises the following raw materials by weight: 30-34 parts of medium temperature pitch, 4-6 parts of modified silica sol and 10-12 parts of artificial graphite powder; from two aspects, firstly, the aluminum dihydrogen phosphate and the boric acid aqueous solution are added, the aluminum dihydrogen phosphate can promote the asphalt to form a denser and firmer glassy carbon structure during carbonization, and phosphorus pentoxide generated by decomposition of the aluminum dihydrogen phosphate and boron oxide generated by dehydration of boric acid can generate a glass phase with an anti-oxidation effect; secondly, core-shell particles are added, a shell layer of the core-shell structure is an aluminum hydroxide structure generated by hydrolyzing aluminum nitrate nonahydrate, and an inner core is epoxidized nano silicon carbide; through the synergistic effect of the two, the mechanical property and the oxidation resistance of the carbon-graphite material are improved.

The invention discloses a porous carbon material preparation method based on a fluidized bed steam step-by-step activation method, and belongs to the field of porous carbon material preparation, the method comprises the following steps: carbonizing a biomass carbon-based raw material to prepare first carbonized particles; the first carbonized particles are subjected to acid pickling, and second carbonized particles with the ash content being smaller than 0.3% and the pH value being 6-8 are obtained; placing the second carbonized particles in a fluidized bed reactor, and carrying out first activation treatment; and stopping heating after the first activation treatment is completed, keeping the temperature when the temperature of the fluidized bed reactor is reduced to 850 DEG C, carrying out second activation treatment, and cooling to room temperature after the second activation treatment is completed. The method is simple in process operation, green and environment-friendly, and has a wide large-scale production prospect.

This invention discloses a method for preparing spinnable mesophase pitch. The method includes: (1) distilling catalytic oil slurry under reduced pressure at a separation temperature of 365-380℃ to separate light distillate and heavy distillate; (2) hydrogenating the light distillate from step (1), and fractionating the hydrogenated product to obtain hydrogenated light distillate II; (3) countercurrently contacting the heavy distillate from step (1) with an extraction solvent, thereby extracting the heavy distillate under supercritical conditions to obtain an extractant; (4) co-carbonizing the extractant from step (3) with the hydrogenated light distillate II from step (2) under an inert atmosphere and with a co-carbonizing agent to obtain mesophase pitch. This invention allows for more precise control of the utilization of catalytic oil slurry raw materials, improves the raw material utilization rate, and increases the yield and broad-spectrum mesophase pitch content of spinnable mesophase pitch.

The invention belongs to the technical field of carbon materials, and particularly relates to an oxygen-nitrogen-phosphorus-doped porous carbon material, a preparation method thereof and application of the oxygen-nitrogen-phosphorus-doped porous carbon material to carbon dioxide adsorption. The oxygen-nitrogen-phosphorus-doped porous carbon material is obtained by dissolving ammonium polyvinyl alcohol phosphate, carboxylated chitosan, glutaraldehyde and furfural in water, performing ball milling, performing freeze drying to obtain xerogel and carbonizing the xerogel, the preparation method provided by the invention is simple and efficient, and when the oxygen-nitrogen-phosphorus-doped porous carbon material is applied to large-scale industrial production, the production cost can be saved, and the economic benefit can be improved. The obtained oxygen-nitrogen-phosphorus-doped porous carbon material is applied to the field of carbon dioxide adsorption and has a good carbon dioxide adsorption effect.

The invention relates to the technical field of composite materials, in particular to a silicone rubber composition and a preparation method thereof. The silicone rubber composition is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of white carbon black, 2.8-3.0 parts of hydroxyl silicone oil, 1.1-1.2 parts of hydrogen-containing silicone oil, 0.8-1 part of a cross-linking agent, 20-30 parts of an additive A, 6-8 parts of an additive B and 1.5 parts of a silane coupling agent KH-550. The additive in the additive A is carbonized and forms an intumescent flame-retardant system in the reaction under the combined action of mannitol and bamboo fiber, and generates a flame-retardant gas during decomposition, so that the fire resistance and flame retardance of the silicone rubber composition can be effectively improved, and meanwhile, the additive B is capable of effectively improving the flame retardance of the silicone rubber composition based on the loading of blumea oil and chitosan quaternary ammonium salt. The blumea oil endows the material with an anti-aging function through the good anti-oxidation characteristic, so that the thermal stability and durability of the silicone rubber composition are effectively improved under the combined action of the additives.

The present invention relates to the technical field of activated carbon, and discloses a surface modification method for biomass supercapacitor activated carbon, comprising the following steps: (1) spraying an aqueous solution containing a carbon and nitrogen source dopant onto the surface of the biomass supercapacitor activated carbon to achieve complete wetting, wherein the carbon and nitrogen source dopant is glucosamine; (2) performing hydrothermal carbonization at 120-300°C under an inert atmosphere, and then drying; thereafter, performing heat treatment at 400-500°C under an inert atmosphere; (3) performing an activation reaction under an atmosphere of CO2, water vapor, or a mixture of CO2 and water vapor. By doping the activated carbon with a carbon and nitrogen source dopant and simultaneously performing hydrothermal carbonization, the surface functional groups of the biomass activated carbon are removed, carbon doping repairs the defect sites in its structure, and structural doping is achieved. Nitrogen doping can cause less lattice distortion of the carbon material, thereby improving the conductivity and cycle stability of the capacitive carbon.

The invention belongs to the technical field of high-value utilization of waste plastic resources and preparation of carbon materials, and relates to a system for preparing a carbon material with a controllable specific surface area through continuous carbonization-activation of waste plastics. The system comprises a crushing and drying function unit, a spiral continuous transportation function unit, a carbonization / activation pyrolysis function unit, a KOH precise mixing function unit and a washing and metering function unit, wherein a KOH moisture absorption path is blocked in a nitrogen atmosphere, and directional evolution of a carbon hole structure is realized through segmented temperature control; the material uniform drying and mixing mechanism cooperates with the stirring device to guarantee the matching precision of KOH and pyrolytic carbon; centrifugal separation, a gas storage tank and a compressor are coupled to complete purification and recovery of pyrolysis gas, the pickling and washing module realizes dealkalization of products, and the metering and collecting unit supports a closed loop of a production line. Compared with the prior art, the system disclosed by the invention breaks through the stability defect of an intermittent process, can be used for preparing the porous carbon material with the specific surface area of 600-2000m / g, and provides core equipment support for industrial landing of high-value recycling of waste plastics.

The invention belongs to the technical field of drinking water purification materials, and discloses a drinking water difunctional filtering carbon material which is capable of efficiently removing heavy metals, high in mineral substance retention rate and high in safety, and a preparation method and application of the drinking water difunctional filtering carbon material. The preparation method comprises the following steps: (1) mixing a primary carbonized material, a binder, a pore forming agent and a transition metal salt solution, kneading and forming, and drying to obtain a green body; (2) sequentially carrying out secondary carbonization treatment and thermal activation treatment on the green body, cooling, washing with water until the conductivity of a washing solution is constant, and drying to obtain a porous carrier; (3) immersing the porous carrier in the oxidation modification solution, carrying out solid-liquid separation, washing with water, and drying to obtain a porous oxidation carrier; and (4) immersing the hot porous oxidation carrier in the alkaline polyamine modified solution, adjusting the pH value of the mixture to be close to neutral when the temperature is reduced to room temperature, carrying out solid-liquid separation, and carrying out heat treatment to obtain the drinking water dual-function filtering carbon material, wherein the temperature of the porous oxidation carrier is higher than that of the alkaline polyamine modified solution.

The invention discloses a CO2 adsorption material and a preparation method thereof.The method comprises the steps that 1, a coal-based raw material and an activating agent are mixed and ground to be uniform, and a mixture is obtained; 2) pre-oxidizing the mixture in an oxygen-containing atmosphere to obtain a pre-oxidized sample; 3) carbonizing and activating the pre-oxidized sample in a protective atmosphere, and then performing secondary activation in a CO2 atmosphere to obtain an activated sample; 4) washing the activated sample in an acid solution, washing in an aqueous solution, and drying to obtain an acid-washed sample; and 5) carrying out hot alkali treatment on the acid-washed sample in a high-temperature alkali solution, washing the sample subjected to hot alkali treatment with water, and drying to obtain the adsorption material. The adsorption material prepared by the method has the advantages of large micropore specific surface area, high CO2 adsorption capacity, high CO2 / N2 selectivity and the like, and the preparation process is simple, low in cost and very suitable for large-scale production and application.

The invention discloses a biochar-loaded silicate composite material as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing acid liquor of inorganic acid with biomass, stirring the obtained mixed liquor at 85-95 DEG C until the mixed liquor is evaporated to dryness, and preparing acidified biomass; mixing the acidified biomass with a silicate precursor solution to prepare an acidified biomass loaded silicate composite material; and carrying out carbonization treatment on the acidified biomass loaded silicate composite material to obtain the charcoal loaded silicate composite material. According to the preparation method disclosed by the invention, the biomass is subjected to specific acidizing treatment in advance, so that the prepared biochar-loaded silicate composite material has the effects of short-term removal of cationic heavy metals and long-term soil stability, and has a good treatment effect on cationic heavy metals with different occurrence forms.