319 results about "Catalytic pyrolysis" patented technology

The invention discloses a method for increasing the phenol yield through catalytic pyrolysis of a decommissioned fan blade, and relates to the technical field of waste composite material resourceful treatment.The method comprises the steps that decommissioned fan blade fragment materials obtained after crushing and magnetic separation are subjected to multispectral imaging, multispectral data are obtained, and pretreatment is conducted; performing spectral feature extraction on the preprocessed multispectral data by using a convolutional neural network; identifying and separating the fragment materials based on spectral characteristics and automatic separation equipment; carrying out activation and carbonization treatment on the separated balsa wood fragments to prepare a carbon-based catalyst; carrying out catalytic pyrolysis on the separated fragment material by utilizing an automatic adjusting reactor and a carbon-based catalyst; collecting a product generated by catalytic pyrolysis, and carrying out qualitative and quantitative analysis on phenols to obtain a qualitative analysis result and a quantitative analysis result. According to the method, through a mode of combining multispectral imaging and the convolutional neural network, different types of composite materials are accurately identified and classified.

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 process system and a process method for recycling a hexafluoropropylene oxide byproduct high-boiling residue, and relates to the field of fine fluorine chemical industry. The process system comprises a heat exchange device, a tubular pyrolysis reaction device, a carbonyl fluoride-trifluoroacetyl fluoride separation tower, a tubular cracking reaction device, a water washing device and an alkali washing device. According to the method disclosed by the invention, the industrial-grade carbonyl fluoride and trifluoroacetyl fluoride are prepared by catalytically pyrolyzing the hexafluoropropylene oxide by-product high-boiling residue; furthermore, a byproduct high-boiling residue of hexafluoropropylene oxide is subjected to complete catalytic cracking to obtain carbonyl fluoride, and a byproduct industrial hydrofluoric acid can be obtained. According to the process system and the process method, the hexafluoropropylene oxide byproduct is recycled into carbonyl fluoride, trifluoroacetyl fluoride and industrial hydrofluoric acid with high added values, harmlessness and recycling of the hexafluoropropylene oxide byproduct high-boiling residues are achieved, the utilization rate of fluorine atoms is 100%, and the process method is mild in reaction condition, economical and environmentally friendly.

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.

The invention discloses a metal organic framework catalyst as well as preparation and application thereof in viscosity reduction of super heavy oil, and belongs to the technical field of catalytic pyrolysis. The metal organic framework catalyst provided by the invention is prepared from transition metal salt, an organic ligand and a solvent, wherein the transition metal salt is at least one of ferric salt, nickel salt, copper salt and titanium salt; the organic ligand is a carboxylic acid compound with carboxylic acid or a nitrogen-containing heterocyclic ring compound. The catalyst disclosed by the invention has an ultrahigh specific surface area and sufficient active sites, can realize in-situ catalytic modification of the super-heavy oil at an oil reservoir temperature, and effectively reduces the viscosity of the super-heavy oil.

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.

A production device for preparing wax-based chemicals and alpha-olefin through catalytic pyrolysis of a waste plastic downer is characterized in that clean waste plastic is crushed and then is connected into a water-cooling feed pipe through a controllable feeder, a pyrolysis dry gas injection port is formed in the top end of the water-cooling feed pipe, and the bottom end of the water-cooling feed pipe is connected into a hot-melting dechlorination reactor; one path of the bottom of the hot-melting dechlorination reactor returns to the upper part of the hot-melting dechlorination reactor, the other path of the bottom of the hot-melting dechlorination reactor is connected with an atomization feeding nozzle, and a fuel gas extraction opening in the top of the hot-melting dechlorination reactor is communicated with the bottoms of the desulfurization dechlorination reactor and the riser regenerator; atomization feeding nozzles are symmetrically installed on the upper middle portion of a downer catalytic pyrolysis reactor, the bottom of the downer catalytic pyrolysis reactor is connected with an oil-gas-solid separator, a gas-phase outlet of the oil-gas-solid separator is communicated with a fractionating tower, and a solid-phase outlet of the oil-gas-solid separator is communicated with the bottom of a riser regenerator; a first-stage gas-solid separator and a second-stage gas-solid separator are sequentially mounted at the top of the riser regenerator and are communicated with the top of the downer catalytic pyrolysis reactor and the bottom of the riser regenerator; the top of the fractionating tower is communicated with the water-cooling feeding pipe, and the tower bottom is communicated with the upper part of the hot-melting dechlorination reactor.

The invention discloses a high-value utilization method of a waste battery diaphragm. The method comprises the following steps: S1, carrying out first mixing and filtering on the waste battery diaphragm and papermaking black liquid to obtain first waste liquid and a pretreated battery diaphragm in which part of an aluminum oxide coating is removed; wherein the pretreated battery diaphragm is subjected to catalytic pyrolysis, and aromatic hydrocarbon and solid carbon are obtained; s2, coagulating and filtering the first waste liquid to obtain second waste liquid and first filter residues; wherein the first filter residues are subjected to first drying, and lignin is obtained; s3, the second waste liquid is neutralized, filtered and secondarily dried, and second filter residues are obtained; and roasting the second filter residue and the solid carbon to obtain the porous alumina. By adopting the method disclosed by the invention, the waste battery diaphragm and the papermaking black liquor can be efficiently pretreated, the high-value aromatic hydrocarbon can be selectively prepared by catalytic pyrolysis of the waste battery diaphragm, and a coating material of the waste battery diaphragm can be recycled.

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.

A process for separating fillers from catalysts and gases in plastics in a fluidized bed catalytic pyrolysis process is described that converts waste plastics, polymers, and other waste materials to useful chemicals and fuel products, such as aromatics such as paraffins, olefins, and BTX.

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 is in the field of catalytic processes. In particular the present invention is directed to a thermo-catalytic pyrolysis process for the preparation of low molecular weight monocyclic aromatic compounds. In accordance with the present invention there is provided a thermo-catalytic pyrolysis process for the preparation of low molecular weight monocyclic aromatic compounds from a feed stream comprising biomass and / or one or more polymers, comprising the steps of: a) subjecting the feed stream comprising biomass and / or one or more polymers to a pyrolysis treatment at a pyrolysis temperature to produce pyrolysis vapors; b) optionally cooling or heating the pyrolysis vapors; c) contacting the pyrolysis vapors with an aromatization catalyst at an aromatization temperature in a catalytic conversion step to yield a conversion product comprising low molecular weight aromatic compounds; and d) optionally recovering the low molecular weight monocyclic aromatic compounds from the conversion product; wherein catalytic conversion step c) is performed in a smooth or bubbling fluidized bed reactor.

To provide a novel process for preparing low molecular weight aromatic compounds such as benzene, toluene, and xylene (BTX) from plastics.SOLUTION: There is provided a thermo-catalytic pyrolysis process for preparing aromatic compounds from a feed stream comprising plastic, including the steps of: a) subjecting a feed stream comprising a plastic to a pyrolysis treatment at a pyrolysis temperature in the range of 600 to 1000°C to produce pyrolysis vapors; b) optionally cooling the pyrolysis vapors to a temperature that is below the pyrolysis temperature; c) contacting the vaporous phase with an aromatization catalyst at an aromatization temperature in the range of 450 to 700°C, which is at least 50°C lower than the pyrolysis temperature, in a catalytic conversion step to yield a conversion product comprising aromatic compounds; and d) optionally recovering the aromatic compounds from the conversion product.SELECTED DRAWING: None

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 a biomass conversion catalyst and a preparation method and application thereof, the catalyst comprises a carrier and active metal components, and the active metal components are distributed on the surface and in pores of the carrier; the carrier is of a core-shell structure comprising an inner core and a shell layer, the inner core is a ZSM-5 molecular sieve containing micropores and mesopores, and the shell layer is a mesoporous MCM-41 molecular sieve. The invention also provides a preparation method and application of the biomass conversion catalyst. A high-activity composite structure catalyst is formed by modulation of a carrier pore channel structure and introduction of a metal active phase, multiple functions of catalytic cracking, reforming, carbon deposition inhibition and the like are integrated, efficient and accurate cracking of macromolecular compounds in raw materials is achieved in a catalytic pyrolysis reaction, meanwhile, carbon deposition is effectively inhibited, side reactions are reduced, and the service life of the catalyst is prolonged. A high-quality bio-oil product is obtained.

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.

The invention discloses a high-valued comprehensive utilization method of a waste battery diaphragm. The method comprises the following steps: S1, mixing and filtering the waste battery diaphragm and titanium white waste acid to obtain filtrate and a pretreated battery diaphragm in which part of an aluminum oxide coating is removed; wherein the pretreated battery diaphragm is subjected to catalytic pyrolysis, and aromatic hydrocarbon and solid carbon are obtained; s2, the filtrate is subjected to oxidation, polymerization and curing in sequence, and polyaluminum ferric sulfate is obtained.By means of the method, the waste battery diaphragm can be efficiently recycled, and titanium dioxide waste acid is fully purified and utilized. The method can realize selective preparation of aromatic hydrocarbon by catalytic pyrolysis of the waste battery diaphragm, can also comprehensively utilize the main component ferrous sulfate of the titanium dioxide waste acid to obtain polyaluminum ferric sulfate, can also obtain the coating material aluminum oxide of the waste battery diaphragm, and is a feasible and efficient method for realizing high-value utilization of the waste battery diaphragm and the titanium dioxide waste acid.

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 invention discloses a preparation method and application of a modified red mud catalyst, and belongs to the technical field of resource recovery. The method comprises the following steps: drying, grinding and screening a large amount of solid waste red mud, preparing an acid solution with a certain concentration by using citric acid, pickling, titrating red mud slurry until the pH is 8-10 by using ammonia water after pickling, washing and drying the titrated slurry, and loading nickel by using an impregnation method, roasting the metal-loaded red mud in air at a certain temperature to complete the preparation of the modified red mud catalyst; the prepared red mud catalyst is used for producing synthesis gas through catalytic pyrolysis of solid waste, the yield of the synthesis gas can be remarkably increased, and meanwhile the recycling way of industrial solid waste red mud is widened.

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.