112 results about "Catalytic pyrolysis" patented technology

The invention relates to the technical field of heavy oil product treatment, in particular to a method and device for co-production of a carbon material through molten salt pyrolysis of a liquid oil product, and the method comprises the following steps: the liquid heavy oil product is put into an electric heating molten salt reactor through a continuous feeding system, and the molten salt reactor is filled with a molten alkaline molten salt medium; carrying out catalytic pyrolysis reaction on the oil product in a liquid phase environment of the molten salt medium, wherein the oil product stays in the molten salt for 5-10 seconds; the liquid oil product is uniformly cracked in the liquid phase of the molten salt to generate low-carbon hydrocarbon gas, hydrogen and dispersed fine carbon particles, and the carbon particles suspend on the surface under the buoyancy action of the molten salt and are not deposited and gathered; suspended carbon particles are collected from the surface of the fused salt in real time through a mechanical push rod continuous collection system; according to the method, continuous and stable pyrolysis of the heavy oil product and efficient and continuous separation of the product can be realized in the liquid-phase molten salt environment, the production efficiency is improved, and the stability of the product quality is ensured.

The invention belongs to the technical field of biomass energy utilization, and particularly relates to a method for improving the selectivity of light aromatic hydrocarbon in a biomass product through catalytic pyrolysis of a zeolite molecular sieve catalyst. The content of medium-strong acid sites in the zeolite molecular sieve catalyst is found to have relatively strong positive correlation with the selectivity of light aromatic hydrocarbons prepared during catalytic pyrolysis of biomass, so that when the zeolite molecular sieve catalyst is used for catalytic pyrolysis of biomass, the content of the medium-strong acid sites in the zeolite molecular sieve catalyst can be increased by increasing the proportion of the medium-strong acid sites in the zeolite molecular sieve catalyst; the selectivity of light aromatic hydrocarbon in the catalytic pyrolysis product is improved.

The invention discloses a high-value preservation utilization and harmless treatment system and method for waste aluminum. Comprising the steps of waste aluminum pretreatment (three-dimensional screening and nano bubble cleaning), dynamic paint removal (moving bed partition low-temperature catalytic pyrolysis), smelting, melt deep purification (Ar gas rotary dehydrogenation, ceramic filtration and electromagnetic refining) and aluminum ash resourceful treatment (80 DEG C hydrolysis and ammonia gas and composite salt crystallization recovery). According to the method, the problems of high cost, degraded utilization, environment-friendly defects and incomplete aluminum ash treatment of the existing waste aluminum regeneration raw materials are solved, direct regeneration of 3004 / 5052 and other high-added-value aluminum alloy plate strip foils is realized, and the alloy component deviation is less than or equal to 0.3 wt%; carbon emission is reduced to 0.82 t CO per ton of aluminum, and is reduced by 31% compared with that of traditional secondary aluminum; and the recovery rate of aluminum ash ammonia reaches 92.5%, the purity of the composite salt product is 96.3%, the double targets of high-valued cyclic utilization and harmless treatment of waste aluminum resources are achieved, and the method has remarkable economic, environment-friendly and technical advantages.

The invention discloses an intelligent catalytic thermal cracking reaction system and method for complex mixed waste plastics, and belongs to the technical field of waste plastic resourceful treatment. The system comprises a feeding device, a high-pressure multi-section cracking reaction kettle, a spraying type heat exchange temperature control system, a heating system, a sensing and analyzing unit, an intelligent control system and a product condensation separation and utilization unit, the method specifically comprises the following steps: (1) pretreating and feeding raw materials; (2) multi-section temperature control cracking reaction; (3) intelligent feedback control; (4) the catalyst has a synergistic effect; and (5) product separation and recovery. According to the invention, a unique spraying type high-pressure multi-section temperature control system is combined with intelligent control of a rate matching algorithm, so that efficient, directional and stable cracking of complex mixed waste plastics is realized, the yield of high-value products such as light olefins, aromatic hydrocarbons and the like is remarkably improved, byproduct residues and energy consumption are reduced, and long-term continuous operation is realized.

The invention provides an optimization method and system for a biomass catalytic pyrolysis process, belongs to the crossing field of chemical engineering and artificial intelligence, and aims to solve the problem of collaborative optimization of the yield of multiple competitive aromatic hydrocarbon products. The method comprises the following steps: acquiring a data set containing input parameters and corresponding to multiple target aromatic hydrocarbon yields; training a machine learning prediction model based on the data set; integrating the model with a multi-objective optimization algorithm; the model is called through an algorithm to conduct iterative optimization, a Pareto optimal solution set is obtained with the aim of optimizing the yield of multiple aromatic hydrocarbons at the same time, and the solution set comprises multiple sets of optimized input parameter combinations. According to the method, efficient global optimization can be realized, multi-scheme decision support is provided, and the research and development cost is reduced.

A method for converting plastic waste into polypropylene includes (a) converting the plastic waste into a hydrocarbon liquid stream and a gaseous hydrocarbon stream in a catalytic pyrolysis unit, wherein the gaseous hydrocarbon stream is greater than about 60% by weight of the output and contains greater than about 40% by weight of light olefins; (b) introducing the gaseous hydrocarbon stream into one or more separation units to produce a first propylene stream, a first ethylene stream, a first butene stream, and a saturated gas stream, wherein the saturated gas stream contains C1 to C4 saturated hydrocarbons; (c) optionally, feeding the first propylene stream into a purification unit to produce a polymer-grade propylene stream; and (d) feeding the first propylene stream and, if present, the polymer-grade propylene stream into a polymerization unit to produce polypropylene.

The invention provides a lanthanum modified magnetic nano carbon adsorbent as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The method comprises the following steps: performing catalytic pyrolysis on biomass by Fe < 3 + > to form hierarchical porous biochar; epitaxially growing a Fe3O4 magnetic layer by a hydrothermal method; carrying out free radical polymerization grafting on poly (1-vinyl imidazole); and La < 3 + > coordination loading and alkali activation. When 0.03 g / L (pH is 3-4) of the obtained adsorbent is added into phosphorus-containing wastewater, the 30-min phosphate removal rate is larger than or equal to 94%, the Langmuir adsorption capacity is larger than or equal to 117.32 mg P / g, and the adsorption retention rate is larger than or equal to 90% and the La dissolution rate is smaller than or equal to 0.2% after five times of circulation. According to the lanthanum modified magnetic nano-carbon adsorbent as well as the preparation method and the application thereof, lanthanum modification is performed on the magnetic nano-carbon, so that the obtained lanthanum modified magnetic nano-carbon adsorbent has the advantages of high adsorption capacity on phosphate in a water body, good selectivity, high removal rate, easiness in separation and recovery, small mass loss, no dissolution, no secondary pollution problem and the like.

The application discloses a method for directional reduction of valuable metals by hydrogen production through catalytic pyrolysis of waste ternary lithium battery separators, and belongs to the field of waste lithium battery recycling industry. After discharge, disassembly, crushing and screening, the waste ternary lithium battery is obtained as a shell, positive and negative electrode materials, a current collector, a separator and an electrolyte. The separator is used as a raw material to release volatile matter in a pyrolysis unit in an inert atmosphere. Less than 10% of the positive electrode material is taken as a catalyst, and the volatile matter is introduced into a catalytic reforming unit to obtain hydrogen-rich gas. The hydrogen-rich gas is introduced into a medium-temperature reduction unit to realize the reduction of high-valence metals such as nickel, cobalt and manganese in more than 80% of the positive electrode material. The solid particles collected from the catalytic reforming unit and the medium-temperature reduction unit are used as reduction black powder, and the reduction black powder is added to an acid solution without an additional reducing agent for leaching and recycling of valuable metals. Therefore, the method can effectively utilize the endogenous separator and positive electrode material of the lithium battery, obtain hydrogen-rich gas with high yield, and the catalyst has strong stability, avoiding the problems of easy sintering and poor reusability of conventional catalysts. The recovery rate of valuable metals is more than 90%, and the problems of high cost and serious secondary pollution caused by the introduction of an additional reducing agent are solved.

The invention relates to a method for catalytically pyrolyzing waste tires by utilizing modified sintering ash, which comprises the following steps of: performing high-temperature heat treatment modification on the sintering ash, and performing pyrolytic reaction on the modified sintering ash and the waste tires in a reaction furnace to obtain a pyrolytic oil liquid-phase product rich in monocyclic aromatic hydrocarbon and limonene. According to the invention, the modified sintering ash is used as a catalyst, so that the yield of pyrolytic oil in the pyrolysis process of the waste tire is increased, and the content of monocyclic aromatic hydrocarbon or limonene in the pyrolytic oil is increased. In addition, Fe and Zn metals are recovered through the rotary hearth furnace. The invention provides an efficient treatment and utilization mode of the sintering ash, meanwhile, the composition of the waste tire pyrolytic oil can be effectively improved, metal resources can be recycled, good environmental benefits and economic benefits can be generated, corresponding environmental problems can be solved, and considerable economic benefits can also be brought.

The invention discloses a system for hydrogen production and carbon production through methane cracking synergistically enhanced by plasma. The system comprises a gas source, a cracking reaction bin and a plasma torch, a double-layer stainless steel sleeve catalytic carrier is arranged in the cracking reaction bin, the double-layer stainless steel sleeve catalytic carrier comprises an inner-layer sleeve and an outer-layer sleeve, through holes with the aperture of 5-10 microns are distributed in the inner-layer sleeve, and through holes with the aperture of 20-50 microns are distributed in the outer-layer sleeve; the inner wall of the inner-layer sleeve is coated with a catalytic coating; the gas source provides and conveys methane gas into the cracking reaction bin; and the direct-current plasma torch conveys high-temperature plasma into the double-layer stainless steel sleeve catalytic carrier. A double-layer porous stainless steel sleeve is constructed in a plasma reaction cracking bin to serve as a catalytic carrier to load a catalytic coating, and a deep coupling structure of plasma cracking and catalytic cracking is constructed; and efficient conversion of methane and synchronous preparation of a high-added-value carbon material and high-purity hydrogen energy are realized.

The invention discloses a method for preparing a plastic catalytic pyrolysis catalyst from secondary aluminum ash and application of the method, and belongs to the technical field of solid waste resource utilization and catalytic chemistry. The method comprises the following steps: carrying out water washing, drying and roasting pretreatment on the secondary aluminum ash; the pretreated secondary aluminum ash and sodium salt are mixed in proportion and roasted and modified at the temperature of 600-850 DEG C; after crushing and grinding, carrying out dipping modification by adopting a solution containing transition metal, and drying; mixing with a binder, molding, aging, and finally drying, activating and roasting to obtain the catalyst. The transition metal is selected from at least one of Fe, Ni, Co and Mo, and the sodium salt is sodium carbonate or sodium bicarbonate. The catalyst prepared by the method can be used for catalytic pyrolysis of polyolefin waste plastics, the reaction temperature is 450-550 DEG C, and the mass ratio of the catalyst to the plastics is 1: 10-1: 2. According to the invention, high-valued utilization of the secondary aluminum ash is realized, and the prepared catalyst is low in cost and high in activity, can efficiently convert waste plastics into low-carbon olefins and aromatic hydrocarbons, and has remarkable environmental and economic benefits.

This invention belongs to the technical field of molecular sieve material preparation and biomass catalytic pyrolysis, and discloses a method for preparing hollow HZSM-5 molecular sieves with starch assistance and alkali concentration-silicon-aluminum ratio matching control. The method includes: S1, forming a gel mixture with a certain silicon-aluminum ratio using silicon and aluminum sources, adding starch and performing a crystallization reaction to obtain a parent ZSM-5 molecular sieve; S2, adding the parent ZSM-5 molecular sieve to a sodium hydroxide solution for alkali treatment, and controlling the molar concentration of NaOH to maintain a match with the silicon-aluminum ratio; S3, performing ammonium exchange and secondary calcination on the alkali-treated product to obtain the final hollow HZSM-5 molecular sieve product. This invention also discloses corresponding typical applications. Through this invention, problems such as the difficulty in controllable preparation of hollow HZSM-5 molecular sieve structures, insufficient mass and heat transfer performance of traditional microporous structures, and the difficulty in synergistic optimization of pore structure construction and acidity distribution in existing technologies can be effectively solved simultaneously. It is particularly suitable for applications that improve the selectivity of BTX in pyrolysis products.

The invention provides a modified carbon-based catalyst, a preparation method thereof and application of the modified carbon-based catalyst in preparation of naphtha through catalytic pyrolysis of waste mulching films, and relates to the technical field of plastic resource regeneration. The modified carbon-based catalyst comprises a biochar carrier and an active metal Zn or Zn / Ni, the loading capacity of the active metal is 40-70 wt%, the specific surface area of the modified carbon-based catalyst is 700-900 m < 2 > / g, and the micropore porosity is 80-90%. The metal zinc and nickel are loaded in the carbon-based catalyst, so that the physicochemical characteristics and the electronic performance of a catalytic material are effectively improved, abundant catalytic active sites and functional groups are constructed, and the catalytic activity is effectively enhanced through the synergistic effect of the metal active sites and the porous structure; and thus, the yield and selectivity of high-quality naphtha prepared by catalytic pyrolysis of the waste mulching film are improved.

The invention relates to the technical field of renewable energy sources, and discloses a biomass catalytic pyrolysis coupling online upgrading liquid fuel preparation reaction device which comprises a base, the upper surface of the base is fixedly connected with a discharging mechanism, the upper surface of the base is provided with a feeding assembly, and the feeding assembly is located at the bottom end of the discharging mechanism; a first pyrolysis mechanism is fixedly connected to the lower surface of the first fixing shell, the bottom end of the first pyrolysis mechanism is fixedly connected to the upper surface of the base, a reaction mechanism is arranged at one end of the connecting pipe, an auxiliary assembly is fixedly connected to the upper surface of the reaction mechanism, and a storage tank is arranged at the bottom end of the reaction mechanism. And a filtering mechanism is mounted in the base. When a material distributing plate of the feeding assembly rotates to a connecting frame, a sliding plate is driven to compress a spring and press an injection pipe button, after the material distributing plate leaves, the spring pushes a component to reset, injection pauses, medium injection is matched with raw material conveying rhythm, and it is ensured that pyrolysis oil gas and media are fully mixed and reacted.

The invention relates to the technical field of catalysts, in particular to a carbon-based catalyst, a preparation method thereof and application of the carbon-based catalyst in catalytic pyrolysis of plastics. The preparation method of the carbon-based catalyst comprises the following steps: 1) mixing a first doping source and a biomass raw material to obtain a first catalyst precursor; 2) carrying out first roasting on the catalyst precursor in an inert gas atmosphere; the first doping source comprises a nitrogen source and / or a sulfur source. By introducing a doping source into the biochar, the carbon-based catalyst which is high in activity, high in stability, low in cost and environmentally friendly can be obtained, and the carbon-based catalyst can be applied to catalytic cracking of waste plastics to prepare high-quality liquid fuel oil.

The application belongs to the technical field of laminated glass, and particularly relates to a yellowing-resistant polyurethane glass interlayer film for laminated glass and a processing technology thereof. The interlayer film is prepared from raw materials including polyisocyanate, polyester dihydric alcohol, dimethylformamide, polybutylene adipate, hexamethylene diisocyanate, chain extender, light stabilizer, catalyst and curing agent. The curing agent is prepared by the following method: reacting an olefinic halogen-containing compound with a terminal hydrogen-containing silicone oil to obtain modified silicone oil A; reacting the modified silicone oil A with potassium phthalimide, and then performing hydrazinolysis to obtain modified silicone oil B; reacting the modified silicone oil B with dimethyl carbonate to obtain modified silicone oil C; and performing catalytic pyrolysis to obtain the curing agent. The curing agent can improve the yellowing resistance of the polyurethane glass interlayer film. By combining the residual chain extender with the curing agent, the curing agent is better mixed with the polyurethane, so that the mechanical properties of the polyurethane interlayer film are improved, the aging resistance is increased, and the yellowing resistance of the polyurethane interlayer film is further improved.

This invention discloses a flux pyrolysis method to solve the problems of frequent maintenance, secondary pollution, and insufficient furnace purification caused by traditional condensation recovery methods. The method introduces waste gas containing flux volatiles into a pyrolysis system, where large particles are filtered to intercept them. The filtered waste gas is then preheated by indirect heat exchange with the clean gas to be discharged after pyrolysis. The preheated waste gas is then heated to the catalytic pyrolysis reaction temperature. The waste gas is then brought into contact with a catalyst for catalytic oxidation pyrolysis in an oxygen-containing atmosphere, generating harmless gases. The high-temperature harmless gas generated by pyrolysis is used as clean gas and indirectly exchanged with the unpyrolyzed waste gas to recover heat. The harmless gas after heat recovery is discharged or recycled to the welding equipment as a protective atmosphere. This solution pyrolyzes pollutants into harmless gases online at the source, eliminating condensate accumulation, achieving maintenance-free or extremely low-frequency maintenance, maintaining a continuously clean furnace atmosphere, eliminating secondary pollution, and significantly reducing maintenance costs.

The invention discloses an environment-friendly composite catalyst for preparing gasoline through plastic catalytic pyrolysis and application of the environment-friendly composite catalyst, relates to the technical field of catalysts for preparing gasoline through polyethylene pyrolysis, and aims to improve the yield of gasoline prepared through plastic catalytic pyrolysis. The composite catalyst is composed of a metal oxide and an HZSM-5 zeolite molecular sieve, the mass ratio of the metal oxide to the HZSM-5 zeolite molecular sieve is 1: (2-10), the metal element of the metal oxide is one of Ce, Zr, Al and Ti, the molar ratio range of Si to Al in the HZSM-5 zeolite molecular sieve is (10-300): 1, the composite catalyst is used for catalytic pyrolysis of low-density polyethylene, the gasoline yield can reach 61.89%, the composite catalyst is regenerated and repeatedly used for catalytic pyrolysis of low-density polyethylene, and the gasoline yield can reach 61.89%. The reduction value of the gasoline yield in the fourth time can be lower than 2.5% compared with the gasoline yield in the first time; the composite catalyst disclosed by the invention is simple in component, only two materials are mixed, the plastic pyrolysis catalysis efficiency is high, the gasoline yield is high, and the composite catalyst has a relatively high recycling value.

The invention discloses a method for preparing water-soluble calcium potassium fulvate and solid calcium humate through catalytic pyrolysis of oyster shells and biomass. The method comprises the following steps: preparing a catalyst; the pretreated oyster shells and biomass are mixed, a citric acid-ethanol solution is added for ultrasonic treatment, the mixture is mixed with a catalyst and an oxidizing agent, and the temperature is increased in the inert gas atmosphere; spraying a KOH solution, and heating to generate a pyrolysis product; and adding deionized water into the pyrolysis product, uniformly stirring, reacting in a high-temperature and high-pressure reaction kettle, cooling to room temperature after the reaction is finished, and separating and purifying to obtain the water-soluble potassium calcium fulvate and solid calcium humate. According to the invention, high-cost chelating agents such as EDTA (Ethylene Diamine Tetraacetic Acid) and the like are replaced by recycling wastes, the cost of the calcium fertilizer is reduced by 80%, the crop yield is increased by 30-50%, and an efficient low-carbon solution is provided for improvement of saline-alkali soil.

The application discloses a method for preparing bio-oil by co-pyrolysis of black liquor solids and waste plastics with Ni-Mo / HZSM-5 as a catalyst, and high-quality bio-oil is prepared by co-pyrolysis of black liquor solids and waste plastics with Ni-Mo / HZSM-5 as a catalyst. Research shows that the addition of plastics can significantly improve the yield of hydrocarbons. The total hydrocarbon of black liquor solids, black liquor solids and polypropylene, and black liquor solids and polyethylene increases by 6%, 78% and 45% respectively under the catalytic pyrolysis of Ni-Mo / HZSM-5, and waste plastics have a synergistic effect on the pyrolysis of black liquor solids. When black liquor solids and polyethylene are co-pyrolyzed, the yield of alkanes is the highest at 69.44% at a temperature of 650 DEG C. When black liquor solids and polypropylene are co-pyrolyzed, the yield of alkanes is the highest at 44.9% at a temperature of 550 DEG C. The obtained pyrolysis bio-oil is mainly composed of hydrocarbons, and is a kind of high-quality bio-oil.

The present application relates to a method for reducing catalyst consumption and energy consumption in the process of microwave pyrolysis of waste polymers by melt pretreatment, belonging to the technical field of microwave catalytic pyrolysis recycling. It is well known that the microwave absorption ability of polymers is poor, and when using efficient and clean microwave pyrolysis, a sufficient amount of catalyst with strong microwave absorption ability is needed to start the reaction. Usually, the mass ratio of catalyst to polymer is close to 1:1, or even higher. The present application proposes that after mixing the waste polymers with the catalyst, melt pretreatment is carried out to reduce the bulk volume of the polymers, so that the catalyst is more concentrated, thereby improving the response of the mixture to microwaves. At the same time, the catalyst consumption is reduced, and the time for microwave to start pyrolysis is also shortened. This melt pretreatment method can significantly reduce the catalyst consumption in the pyrolysis process while ensuring high microwave heating efficiency, and also indirectly increases the single processing capacity of pyrolysis, which has a significant industrialization prospect.

The invention discloses a method for preparing light aromatic hydrocarbon by catalytic pyrolysis of waste polypropylene plastics, which comprises the following steps: by taking a hollow ZSM-5 molecular sieve as a carrier, loading metal Ga by an ion exchange method, introducing Zr by an impregnation method to obtain a zirconium-gallium modified hollow ZSM-5 molecular sieve catalyst, and carrying out two-stage ex-situ reaction process, firstly, deeply depolymerizing the polypropylene plastics to obtain the light aromatic hydrocarbon. Macromolecular long-chain hydrocarbon is converted into micromolecular short-chain hydrocarbon, so that a more suitable reactant is provided for subsequent aromatization; then short-chain hydrocarbon is fully diffused in pore channels of the zirconium-gallium modified hollow ZSM-5 molecular sieve, and is subjected to hydrogen transfer and aromatization reaction under the synergistic effect of acidic sites of the molecular sieve. Meanwhile, the introduction of nitrogen or carbon dioxide atmosphere inhibits the generation of alkane by-products caused by hydrogen transfer to a certain extent, and further improves the selectivity of aromatic hydrocarbon.

The utility model relates to the field of methane high-temperature catalysis systems, in particular to a methane high-temperature catalysis system based on a liquid metal catalyst. The methane high-temperature catalytic system comprises a heat regenerator, a heater, a methane high-temperature catalytic cracking furnace, a hydrogen purification device, a desorbed gas compressor, a three-phase separator, a cooler and a deflation compressor, and the cooler and the three-phase separator are respectively connected to the deflation compressor through pipelines; the deflation compressor, the desorbed gas compressor and the heat regenerator are respectively connected to the hydrogen purification device through pipelines, and the desorbed gas compressor, the methane high-temperature catalytic cracking furnace and the heater are respectively connected to the heat regenerator through pipelines. Through combined communication of the heat regenerator, the heater, the methane high-temperature catalytic cracking furnace, the hydrogen purification device, the desorbed gas compressor, the three-phase separator, the cooler and the air release compressor, automatic continuous production is realized, and through system heat balance optimization, energy consumption is greatly reduced, and methane cracking efficiency is greatly improved.

The application discloses a kind of bauxite catalytic microwave-assisted pyrolysis of waste and old textile resourceization method, belong to microwave-assisted catalytic pyrolysis of waste and old textile processing field.The specific steps are as follows: after washing and dewatering treatment, waste and old textile is dried, granulation;After drying bauxite, grinding and sieving;Waste and old textile and bauxite particles after granulation are treated by microwave pyrolysis;Residual solid after pyrolysis is pyrolysis carbon;After collecting gas generated in the process of pyrolysis, condensation is obtained, and incondensable pyrolysis gas and liquid pyrolysis oil are obtained;The present application utilizes bauxite as catalyst and converts waste and old textile into valuable oil, gas and carbon, realizes the maximum absorption of bauxite and waste and old textile and resource utilization.The present application has low cost, simple operation, and pyrolysis product can meet some energy utilization, so that bauxite and waste and old textile are resourceized, harmless and reduced, achieve the goal of synergistic effect of pollution reduction and carbon reduction, produce good economic benefit, social benefit and environmental benefit.

Ni-MOFC catalyst for cracking tar and its preparation method and application. The present application belongs to the technical field of tar catalytic cracking. The present application is to solve the problem that the catalytic performance of the nickel-based catalyst will decrease seriously during long-term operation, and even cause catalyst deactivation. The method of the present application: taking biomass as the substrate, using two-step carbonization combined with KOH activation to prepare pyrolytic carbon; taking pyrolytic carbon, nickel salt, imidazole and benzene tricarboxylic acid as the substrate for solvothermal reaction, and then pyrolyzing to obtain the catalyst. The obtained catalyst combines the active metal nickel and the carrier in situ, and the nano nickel particles on the inner and outer surfaces of the carrier are uniformly coated as the active center and the support node, the active porous carbon is used as the MOFC carbon base, the interaction between nickel and the carrier is enhanced, the reaction activity and high-temperature anti-inactivation performance of the catalyst are improved, and the catalytic removal of biomass pyrolysis tar is realized. It is suitable for catalytic pyrolysis treatment of tar and resource recovery.

The invention relates to the field of biomass catalytic pyrolysis, and particularly discloses a method for co-producing high-purity phenolic substances and recyclable high-performance biochar through biomass catalytic pyrolysis. And pyrolyzing the dried biomass raw material in a pyrolyzing furnace to obtain primary carbon and volatile components. And conveying the initial charcoal to a reaction furnace for activation modification, and optimizing charcoal preparation parameters by virtue of a machine learning model to obtain high-value charcoal products such as high-performance catalysts and adsorbents. The prepared charcoal is used for carrying out directional catalytic reforming on volatile components, and the reaction conditions are regulated and controlled by virtue of a model, so that the content of target high-value phenolic substances is greatly increased. After use, the biochar with reduced performance is recycled to an activation modification process and activated again, so that cyclic utilization of the biochar is realized. According to the method, the technological process is innovatively reconstructed, parameters are regulated and controlled by means of machine learning, recycling and cyclic utilization of the biochar are achieved, meanwhile, the high-purity phenolic substances and the high-performance biochar are co-produced, and the method has the advantages of being high in cyclic utilization rate, excellent in preparation condition, high in co-production value, wide in applicability and the like.

The present application relates to the technical field of pyrolysis catalyst preparation, and discloses a catalytic pyrolysis combined catalyst and a preparation method thereof. 3 The bulk density of the catalyst B is 0.81-0.87 g / cm 3 The bulk density ratio of the catalyst A to the catalyst B is 0.88-0.95; and the weight ratio of the Y-type molecular sieve contained in the catalyst A and the catalyst B is 2-4:1. The combined catalyst has good anti-wear performance, high low-carbon olefin yield and propylene selectivity in heavy oil catalytic cracking, and can improve the low-carbon olefin yield without increasing the heavy oil and diesel yield.

The application relates to the technical field of waste plastic recycling, and discloses a mixed plastic waste high-value recycling method based on pre-classification and sequential depolymerization. First, mixed plastic waste is crushed and dried, then wet flotation is carried out by using two solutions with different densities, and PET-rich material pieces, PS-rich material pieces and polyolefin-rich material pieces are separated. Subsequently, the PET-rich material pieces are subjected to catalytic alcoholysis to recycle high-purity bis-hydroxyethyl terephthalate monomers; the PS-rich material pieces are subjected to catalytic pyrolysis to recycle high-purity styrene monomers; and the polyolefin-rich material pieces and process residues are subjected to pyrolysis to be converted into pyrolysis oil. By the strategy of 'first separation and then treatment', high-selectivity and high-yield recovery of high-value components in complex mixed plastics is realized, the process route is clear, and the method is economic and environmentally friendly.

The invention provides a fiber-reinforced thermosetting phenolic aerogel composite material and a preparation method thereof, and belongs to the field of thermal protection materials. The N-P and P-O-N cross-linked structures in the phosphorus-nitrogen hybridized phenolic resin play a role in catalyzing the graphitization of pyrolytic carbon at high temperature and strengthen a carbon layer at the same time, so that a compact, coherent and high-thermal-stability phosphorus-nitrogen-carbon ceramic / carbon barrier layer is formed, the transfer of heat and oxygen is effectively isolated, and the carbon residue rate is increased.

The utility model relates to a drying and forming device, in particular to a drying and forming device for biomass pyrolysis catalysis. Comprising a supporting frame, a rotating barrel A, a rotating barrel B, a fixed barrel, a connecting rod, a driving motor, a connecting plate, a scattering plate, a spring and a pressing block, the upper portion of the supporting frame is rotationally connected with the rotating barrel A, the fixed barrel and the rotating barrel B in sequence from left to right, the inner top end of the fixed barrel is connected with the connecting rod, and the right side of the bottom end of the connecting rod is connected with the driving motor; a rotating shaft is rotatably connected to the left side of the bottom end of the connecting rod, connecting plates are circumferentially arranged on the rotating shaft at intervals, scattering plates are slidably connected to the sides, away from the rotating shaft, of the connecting plates, springs are connected between the scattering plates and the connecting plates, and a pressing block is arranged at the inner top end of the fixed barrel. According to the utility model, the fixed barrel with the scattering plate and the driving motor structure is arranged, so that the problem that biomass raw materials are easy to cake and accumulate in the conveying and drying process is effectively solved.