176 results about "Catalytic pyrolysis" patented technology

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.

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 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 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.

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.

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.

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.

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.

The invention relates to the technical field of biomass recycling, and particularly discloses a renewable energy driven biomass pyrolysis-gas phase hydrogenation upgrading system and method.The system comprises a solar heat collection system, a catalytic pyrolysis system, a plasma hydrogenation system and a condensation system. The solar heat collection system uses sunlight to heat a heat storage medium, the catalytic pyrolysis system is used for biomass catalytic pyrolysis to generate pyrolysis gas and carbon, the plasma hydrogenation system is used for exciting green hydrogen through green electricity to generate hydrogen plasma to perform catalytic hydrogenation on the pyrolysis gas, and the condensation system is used for condensing hydrogenation products to obtain liquid fuel. Biomass pyrolysis-gas phase hydrogenation driven by solar thermal driving and renewable green electricity can be achieved, online catalytic hydrogenation is achieved through active hydrogen plasma and pyrolysis gas, compared with a traditional process, stable consumption of renewable green electricity and green hydrogen can be achieved, the whole process is low in carbon emission, small in loss and low in energy consumption, and the method is suitable for industrial production. And the operation is safer and more stable under lower pressure.

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.