236 results about "Catalytic pyrolysis" patented technology

The invention provides a preparation method of a small-diameter single-walled carbon nanotube, and relates to the technical field of carbon nanomaterials. The preparation method comprises the following steps: mixing a nanoscale catalyst, high-purity graphite powder and a liquid carbon source binder, and sequentially molding and sintering to obtain a mixed graphite rod; the nanoscale catalyst contains metal elements, and the metal elements are transition metal elements and / or aluminum elements; and carrying out plasma catalytic pyrolysis by taking the mixed graphite rod as an anode and a pure graphite rod as a cathode to obtain the small-diameter single-wall carbon nanotube. The preparation method provided by the invention is high in yield (the mass ratio of the single-walled carbon nanotubes in a crude product is high), and the single-walled carbon nanotubes with smaller tube diameters can be prepared. Results of the embodiment show that when the preparation method provided by the invention is adopted to prepare the single-walled carbon nanotube, the mass ratio of the single-walled carbon nanotube in a crude product can reach 79%, and the diameter of the single-walled carbon nanotube can be as low as 1.2 nm.

The invention discloses a process for preparing flame-retardant polyethylene plastic by recycling waste polyethylene plastic, and relates to the technical field of high polymer materials. When the flame-retardant polyethylene plastic is prepared, the waste polyethylene is extruded and granulated to prepare the polyethylene master batch; carrying out catalytic pyrolysis on the polyethylene master batch, and then reacting with potassium permanganate to prepare a hydroxylated carbon nanotube; the preparation method comprises the following steps: reacting a hydroxylated carbon nanotube with 1-(chloro-methylphosphoryl) ethylene, and then reacting with (mercaptomethyl) triethoxysilane to prepare a modified carbon nanotube; the preparation method comprises the following steps: carrying out irradiation grafting on a polyethylene master batch, 2-hydroxy-4-propenyl benzophenone and N, N-diethyl allylamine, and then reacting with chloromethyl triethoxy silane to prepare modified polyethylene; and carrying out melt extrusion on the modified carbon nanotubes and the modified polyethylene, carrying out injection molding, and carrying out water treatment to obtain the flame-retardant polyethylene plastic. The flame-retardant polyethylene plastic prepared by the invention has good flame retardant property, antibacterial property, tensile strength and anti-aging property.

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 provides a waste incineration fly ash component regulation and directional conversion treatment method, and belongs to the technical field of solid waste treatment. The method comprises the steps that S1, the waste incineration fly ash is subjected to primary washing to remove most of soluble chlorine salt and heavy metal, solid obtained after solid-liquid separation is subjected to forced leaching with recycled water or clear water, and fly ash obtained after washing and washing waste liquid are obtained; s2, preparing a core-shell structure Fe2O3 / Fe / C composite catalyst, mixing the core-shell structure Fe2O3 / Fe / C composite catalyst with the washed fly ash, granulating, performing catalytic pyrolysis in an inert or micro-aerobic environment, and cracking dioxin organic matters; s3, the washing waste liquid is pretreated and then subjected to segmented evaporation-selective crystallization, and inorganic salt components are recycled according to quality; and flue gas is introduced into the incinerator for synergistic heat treatment. According to the method, inorganic salt and soluble heavy metal in the fly ash can be removed, directional catalytic cracking of dioxin is promoted, the inorganic salt is recycled, and reduction, harmlessness and recycling of the fly ash are achieved.

An improved reactor vessel for processing (recycling and upcycling) of plastics includes a shear plate assembly disposed on a rotatable shaft concentrically disposed within a cylindrical reactor vessel. The shear plates are spaced from the vessel wall to generate a predetermined strain rate between the shear plate and the inner wall via Couette flow, enhancing efficiency of the reaction.

The invention belongs to the technical field of waste plastic treatment, and particularly relates to a method for preparing light aromatic hydrocarbon through catalytic pyrolysis of waste polyolefin plastic. According to the invention, a microporous molecular sieve ZSM-5 is coated in an ordered mesoporous layer SBA-15 by using a super-dilute liquid phase coating method, so that the coated catalyst ZSM-5-coated SBA-15 with the packaging thickness of 60-185 nm is prepared. The coated catalyst has an ordered mesoporous encapsulation layer, and can be pre-cracked and enrich plastic pyrolysis volatile components in the reaction, so that the mass transfer rate is increased, the generation of light aromatic hydrocarbons is promoted, the generation of macromolecular chain hydrocarbon substances in the catalytic pyrolysis process is inhibited, and the efficient preparation of light aromatic hydrocarbons by catalytic pyrolysis of waste polyolefin plastics is realized. Compared with the traditional ZSM-5, when the packaging thickness of the ZSM-5-coated SBA-15 is 90nm, the yield of light aromatic hydrocarbon is 31.02 wt.%, the amplification is up to 49.14%, and meanwhile, the heavy chain hydrocarbon byproduct is reduced by 42.17%.

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.

The invention provides a regeneration method of retired blade glass fibers and a regenerated glass fiber concrete reinforcing material, and belongs to the technical field of green building materials and solid waste resource comprehensive utilization. By constructing an integrated intelligent equipment system of crushing and sorting, glass fiber regeneration and concrete production, the production cost of the regenerated glass fiber concrete reinforced material is reduced by 40% or above compared with that of a traditional process, and the economic threshold value of large-scale engineering application is reached; by adopting a three-stage regeneration technical chain of'multistage crushing pretreatment-two-stage catalytic pyrolysis-interface nano reinforcement ', the bottleneck of performance degradation of the thermosetting composite material regenerated glass fiber is broken through, and the mechanical property and pumping construction performance of the regenerated glass fiber concrete reinforced material are improved; the compressive strength of the regenerated glass fiber concrete reinforcing material reaches 65-82MPa in 28d, and meanwhile, the pumping construction performance with the slump of 180-220mm can be kept.

The invention discloses an optimization method for preparing BTX through biomass catalytic pyrolysis based on automatic machine learning. The optimization method comprises the steps of data set construction, exploratory data analysis and feature engineering, automatic machine learning modeling and evaluation and interpretability analysis and application. According to the method, based on known biomass raw material characteristic parameters, catalyst characteristic parameters, pyrolysis parameters and product selectivity information in literatures, the selectivity of BTX preparation through biomass catalytic pyrolysis is predicted by utilizing an automatic machine learning technology, and a heuristic algorithm is coupled to realize catalyst screening; the problem that a traditional biomass catalytic pyrolysis experiment needs to adopt a trial-and-error method to carry out mass optimization and catalyst screening can be solved, and the method has the characteristics and advantages of reducing experiment cost, automatically screening an optimal model, reversely guiding process optimization, automatically screening a high-efficiency catalyst and the like, so that biomass directional pyrolysis can be efficiently assisted to prepare high-value chemicals.

The invention belongs to the technical field of biomass fuel oil, and particularly relates to a biomass-based liquid fuel oil preparation method which comprises the following steps: mechanical pulverization, enzymolysis reaction, catalytic pyrolysis, hydrogenation upgrading, solid-liquid separation and distillation refining. Crop straw is used as a raw material and is mixed with a compound enzyme preparation, so that macromolecules such as cellulose are degraded into micromolecular saccharides; carrying out catalytic pyrolysis, and converting the product into pyrolytic oil by accurately controlling the reaction conditions under the action of a catalyst; in the preparation process, the catalyst can reduce the pyrolysis temperature, inhibit the generation of nitrogen oxides and improve the oxidation resistance stability of the fuel oil, the compound enzyme preparation is mild in reaction and low in energy consumption, and all the steps synergistically optimize the physicochemical properties of the fuel oil, so that the prepared biomass-based liquid fuel oil has a high calorific value and high combustion efficiency.

The invention provides a method for preparing high-quality oil from plastic. The method comprises a heating pyrolysis gasification stage and a gas phase catalytic modification stage, in the heating pyrolysis gasification stage, waste plastics are placed in a reaction container to be subjected to high-temperature heating pyrolysis to generate gaseous substances, and in the gas phase catalytic modification stage, the gaseous substances are introduced into a modification device to be subjected to catalytic modification to obtain high-quality oil; according to the method, pyrolysis is performed firstly, and then catalytic upgrading is performed, so that compared with direct catalytic pyrolysis, the dosage of a catalyst is reduced, and the cost is saved. The catalyst is not in direct contact with the waste plastic, the service life of the catalyst can be prolonged, separation, recovery, activation and recycling of the catalyst are facilitated, meanwhile, collection and subsequent conversion and utilization of solid components generated by first-step pyrolysis are facilitated, and maximum utilization of waste plastic resources is achieved.

The invention relates to a method and an apparatus for producing hydrocarbons from plastic containing material, wherein the plastic containing material (1) is subjected into a pyrolysis reactor (2), steam (3) is fed into the pyrolysis reactor, and the plastic containing material is pyrolyzed with the steam by using a catalytic pyrolysis with a basic catalyst to convert the plastic containing material to a product (4) comprising hydrocarbons. Further, the invention relates to the use of the product obtained by the method.

A fluidized bed reactor for biomass treatment comprising a vessel extending in a first direction from a first end to a second end, an inlet at the first end of the vessel for feeding biomass particles into the vessel, an outlet at the second end of the vessel for outputting processed biomass, a first fluid inlet independently activatable to deliver a first volume of a gas in a second direction into a first region of the vessel, and a second fluid inlet spaced apart from the first fluid inlet in the first direction and independently activatable to deliver a second volume of the gas in the second direction into a second region of the vessel, the second region adjacent the first region.

The present invention belongs to the field of biomass utilization, and specifically relates to a method for preparing light aromatic hydrocarbons and monophenol products by using molecular sieves and seaweed charcoal for graded catalytic pyrolysis of biomass. The catalytic pyrolysis method of the present invention is to first use a zeolite molecular sieve catalyst to convert the volatile matter of biomass pyrolysis in a low temperature range into light aromatic hydrocarbons to a large extent, and then use a modified seaweed charcoal catalyst to convert the volatile matter of the pyrolysis residue in a medium temperature range into monophenol chemicals. The seaweed charcoal catalyst used in the present invention has high catalytic activity after activation treatment, and can realize the efficient conversion of lignocellulosic biomass into monophenol chemicals. Based on the idea of ​​graded catalytic pyrolysis, the present invention first uses zeolite molecular sieves to catalytically pyrolyze cellulose and hemicellulose in biomass, which solves the problem of poor pyrolysis effect of cellulose and hemicellulose in the process of catalytic pyrolysis of biomass, and then uses seaweed charcoal to catalytically pyrolyze lignin, thereby improving the utilization rate of bio-oil and realizing high-value conversion and utilization of all components of biomass.

The utility model provides microwave catalytic pyrolysis soil remediation equipment. A stirring assembly is arranged in a stock bin and used for stirring materials, a microwave assembly is installed on the stock bin and used for emitting microwave radiation into the stock bin, and a heat storage assembly wraps the stock bin and is used for heat preservation in the stock bin. Microwave radiation is conducted on the interior of the stock bin through the microwave assembly, soil in the stock bin is radiated by microwaves to generate heat, meanwhile, heat is transmitted to the heat storage assembly, heat loss in the stock bin can be reduced, the temperature of the soil is increased rapidly through the combined action of the microwave assembly and the heat storage assembly, physical ex-situ remediation is conducted, and the volatilization speed of harmful substances is increased; the use cost and the time cost are reduced; by adopting the equipment disclosed by the utility model, the polluted soil can be subjected to pyrolysis remediation treatment at the temperature below 200 DEG C under the low-pressure condition, and the problems that the adaptability to a specific site needs to be considered, the remediation process consumes too long time, the equipment cannot be quickly opened and closed, the investment is higher and the like in the traditional physical remediation technology are solved.

The present invention belongs to the technical field of resource recovery and utilization, and discloses a method for selectively preparing monocyclic aromatic hydrocarbons by catalytic pyrolysis of waste tires. The steps are as follows: First, the USY molecular sieve is mixed with a Cu(NO3)2·3H2O solution by an impregnation method to prepare a Cu-USY molecular sieve; then the waste tires and the Cu-USY molecular sieve catalyst are loaded into a quartz tube reactor in layers for rapid catalytic pyrolysis to prepare waste tire pyrolysis oil. The present invention solves the problem that the selectivity of the USY catalyst for monocyclic aromatic hydrocarbons is not high during the pyrolysis of waste tires, resulting in a low yield of monocyclic aromatic hydrocarbons, especially the yield of p-cymene. At the same time, the USY molecular sieve is loaded with a cheap transition metal Cu, which saves costs and has high economic value. The pyrolysis oil rich in aromatic hydrocarbons prepared by this method has broad application prospects for the preparation of fuels or deep processing of chemicals.

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 present invention provides a system and method for catalytically pyrolyzing waste plastics to produce multiple products. This system belongs to the field of waste plastic pyrolysis and includes a plastic-based carbon source coupled air distribution unit, a catalyst circulation deposition unit, a pyrolysis oil condensation unit, and a hydrogen circulation enrichment unit. The system comprises: the plastic-based carbon source coupled air distribution unit for pyrolyzing the waste plastics and collecting pyrolysis gas and hydrogen-rich circulating gas to obtain a mixed gas, which is then fed into the catalyst circulation deposition unit; the catalyst circulation deposition unit for depositing the mixed gas to obtain carbon nanotubes, hydrogen-rich gas, and condensable gas, which is then fed into the pyrolysis oil condensation unit; the pyrolysis oil condensation unit for condensing the condensable gas to obtain pyrolysis oil, which is then fed into the hydrogen circulation enrichment unit; and the hydrogen circulation enrichment unit for collecting hydrogen-rich gas and providing hydrogen-rich circulating gas and hydrogen-rich gas. This system can effectively solve the problem of a single product in the catalytic pyrolysis of waste plastics, achieve high-value utilization of waste plastics, and realize continuous, industrialized production.

The invention relates to an in-situ and ex-situ catalytic pyrolysis device with a movable heating area and a pyrolysis method. The in-situ and ex-situ catalytic pyrolysis device comprises a rack; the reaction tube is axially and horizontally arranged on the rack; the left end of the reaction tube is communicated with a nitrogen cylinder through a rotary joint, a flow meter and a pressure reducing valve; the first end of the three-way pipe is connected with the right end of the reaction pipe through a rotary joint, the second end of the three-way pipe is connected in series with the first condenser and the first gas storage bag through a first stop valve, and the third end of the three-way pipe is connected in series with the second condenser and the second gas storage bag through a second stop valve; the tubular heating furnace is horizontally arranged on the rack in a sliding manner along the axial direction of the reaction tube, and a first heating area and a second heating area which are different in temperature are arranged in the tubular heating furnace; according to the device, on the basis that the in-situ catalytic reaction and the ex-situ catalytic reaction are carried out in the same device, the influence of the heating rate on the rapid pyrolysis of the raw materials is avoided, the full contact between different raw materials in the co-pyrolysis process and the maximum production of target products are ensured, and a catalyst evaluation function is also considered.

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.

A system includes a hydrogen gas production system and a power generation system. The hydrogen gas production system includes a heated gas supply line configured for flow of a heated gas, a hydrocarbon supply line, a catalytic pyrolysis reactor configured to be in thermal contact with the heated gas of the heated gas supply line and produce a hydrogen containing gas by pyrolyzing a hydrocarbon introduced therein via the hydrocarbon supply line, and a separator configured to extract a hydrogen gas from the hydrogen containing gas discharged from the catalytic pyrolysis reactor. The power generation system includes a heated gas collection line configured to collect the heated gas after the thermal contact with the catalytic pyrolysis reactor and supply the heated gas to the power generation system, and a gas turbine having a combustor configured to burn the hydrogen gas introduced therein from the separator via a hydrogen supply line.

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 utility model discloses a modular multifunctional coal pyrolysis device. The modular multifunctional coal pyrolysis device comprises a gas module, a gas activation module, a pyrolysis module, a catalysis module and a receiving module, wherein the gas module comprises a gas pipeline and a reactor end socket; the gas activation module comprises a heating furnace and a first reactor; the pyrolysis module comprises a heating furnace, a reactor II, a reactor seal head and a cooling coil; the catalysis module comprises a heating furnace and a third reactor; the receiving module comprises a refrigerator, a coal tar cooler, a coal tar collector and a pyrolysis dry gas conveying pipe. Compared with the prior art, other types of pulverized coal pyrolysis experiments such as gas activation and pulverized coal pyrolysis coupling research, gas activation and pulverized coal catalytic pyrolysis coupling research, gas activation and pulverized coal rapid pyrolysis coupling research and gas activation and pulverized coal catalytic rapid pyrolysis coupling research can be realized on the same set of device; the flexibility and the operation stability of the coal pyrolysis experimental device are improved, so that the conversion rate of pulverized coal is improved, and the problem that semicoke and a catalyst are difficult to separate is 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 present invention provides a residue-derived hard carbon anode material, a preparation method thereof, and a lithium-ion battery. Wherein, the preparation method includes: using vacuum residue as a raw material, performing low-temperature cracking and coking in a nitrogen-containing atmosphere to obtain a nitrogen-containing coke precursor; under the catalytic action of an external catalyst, subjecting the nitrogen-containing coke precursor to high-temperature catalytic pyrolysis, cross-linking, and polycondensation reactions to obtain a carbon precursor material; infiltrating the carbon precursor material into an organic solution containing an organic lithium salt and then adding an anion source to perform surface modification on it to obtain the residue-derived hard carbon anode material. Using the residue-derived hard carbon anode material provided by the present invention as the anode material of a lithium-ion battery, it has excellent performance and exhibits high-capacity, high first Coulomb efficiency, high-rate, and long-cycle electrochemical performance.

This invention relates to a method for producing phenolic compounds by pyrolysis of lignin catalyzed by a double perovskite, comprising: preparation of a MOF precursor; calcination of the MOF precursor prepared in step one to prepare a MOF-based double perovskite AA' with tunable morphology, specific surface area, and pore structure. 1‑x K x B₂O₆, where A is a rare earth metal, A' is an alkaline earth metal, and B is a transition metal, the molar ratio of the metals in MOFs-based double perovskites is A:A':K:B = 1:(1- x ): x :2, where 0.01≤ x ≤0.40; MOFs-based double perovskite catalytic pyrolysis of lignin to produce phenolic compounds, the phenolic compounds in the liquid phase product include phenols, guaiacol, and syringol, with a total selectivity ≥65%; regeneration of double perovskite. This invention utilizes double perovskite catalytic pyrolysis of lignin to produce phenolic compounds, which can convert lignin into high-value-added chemicals.

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.