295 results about "Plasma reactor" patented technology

The invention relates to the technical field of safety and environmental protection, in particular to a negative-pressure circulating explosion-control dust removal method suitable for combustible dust places, which comprises the following steps: firstly, sealing a bin body and injecting carbon dioxide-nitrogen inert gas to generate a low-oxygen environment; then, a flow guide angle-adjustable cyclone separator, a dielectric barrier discharge plasma reactor and a waste heat thermo-acoustic transducer are driven to cooperatively capture dust, and sound node amplitude synthesis capture data are obtained through compressed sensing of a microphone; inputting the environment data and the capture data into a reinforcement learning process containing a micro-thermochemistry model, and outputting instructions for adjusting negative pressure pulse, inert flow, sound field intensity and cyclone geometry; in combination with distributed radio frequency imaging data, an adversarial digital twinborn model is generated to predict explosion free energy, and automatic rollback or shutdown is carried out when the explosion free energy exceeds a threshold, so that a safe, efficient and low-energy-consumption closed loop is formed.

The invention discloses a method for performing tar steam reforming by coupling low-temperature plasma with a nickel-loaded hydrogen type molecular sieve composite catalyst. The method comprises the following steps: preparing the nickel-loaded hydrogen type molecular sieve composite catalyst; the mass of Ni in the nickel-loaded hydrogen type molecular sieve composite catalyst accounts for 5-30% of the mass of the catalyst; introducing tar and water vapor into a dielectric barrier discharge plasma reactor filled with the nickel-loaded hydrogen type molecular sieve composite catalyst; starting the dielectric barrier discharge plasma reactor, and carrying out a tar steam reforming reaction; wherein the temperature of the tar steam reforming reaction is 150-525 DEG C, and the power of the tar steam reforming reaction is 30-90 W. The catalyst disclosed by the invention is coupled with a low-temperature plasma technology, so that good tar reforming performance, target product selectivity and system stability are realized.

The invention relates to the technical field of plasma equipment, in particular to a plasma reactor, a plasma activated water preparation device and a plasma activated water preparation method, and the plasma activated water preparation device comprises a dielectric barrier discharge unit and a pulse discharge unit. The pulse discharge unit is arranged above the dielectric barrier discharge unit, and a mixed fluid inlet is formed in the bottom of the dielectric barrier discharge unit. And the top of the pulse discharge area is provided with a mixed fluid outlet. One is that discharge of the dielectric barrier discharge unit and pulse discharge of the pulse discharge unit are utilized to respectively provide a large amount of active oxygen and active nitrogen, and two discharge units are integrated in one plasma reactor to realize mutual dissolution promotion of the active oxygen and the active nitrogen; secondly, the multiple stages of plasma reactors are connected in series, the stages are increased according to the water demand, the plasma dosage is ensured, and plasma activated water is prepared in a non-circular circulation mode; and thirdly, the mixing time of the gas-liquid mixed fluid in the preparation device of the plasma activated water is long, so that the waste of the active particles can be prevented.

The invention belongs to the field of contaminated soil remediation and microplastic pollution treatment, and relates to a rotary coaxial DBD plasma treatment device for degrading microplastics in soil. The device comprises a DBD plasma reactor, a gas supply module, an electrode rotating mechanism and a control module, the DBD plasma reactor comprises an inner electrode, a dielectric layer and an outer layer ground electrode; the inner electrode and the outer-layer ground electrode are coaxially arranged, the dielectric layer is arranged between the inner electrode and the outer-layer ground electrode, a gap is reserved between the dielectric layer and the inner electrode, and the inner electrode and the outer-layer ground electrode are respectively connected with the electrode rotating mechanism; the appearance of the inner electrode is of a truncated cone structure, and the surface of the inner electrode is of a spiral structure evenly distributed in the axial direction. By adopting the device disclosed by the invention, the degradation uniformity and thoroughness of the fixed coaxial DBD reactor can be obviously improved.

The present disclosure provides methods and divertors for plasma reactors. The divertors may comprise internal lattice structures to facilitate conductive and convective heat transfer and provide structural support to plasma facing surfaces of the divertor.

The invention discloses a kind of hydrophilic and hydrophobic integrated membrane material and preparation method thereof for desalination of seawater, a hydrophilic solution with a concentration of 0.1 10 mol / L is coated on one side of substrate to obtain a hydrophilic coating;a hydrophobic solution with a concentration of 0.1 10 mol / L is coated on the other side of substrate to obtain a hydrophobic coating;the substrate coated with the coating is placed in a plasma reactor, a carrier gas is passed through, and a power supply parameter is adjusted to trigger a discharge to obtain a desalination membrane material;the edge of the desalination membrane material is subsequently subjected to water isolation treatment. A kind of hydrophilic and hydrophobic integrated membrane material and preparation method thereof for desalination of seawater disclosed by the present invention, by coating on the surface of the material, plasma modification technology is then utilized to prepare a desalination membrane material driven by solar energy, integrating hydrophilic and hydrophobic characteristics in different sides, with antifouling property, efficient desalination can be carried out, and fresh water output is increased.

A system and method for producing methanol and synthetic fuels from waste acid gas streams using a plasma reactor is described in this disclosure. An acid gas stream comprising primarily of H2S and CO2 is fed into a plasma reactor. H2S is converted into H2 and sulfur. Simultaneously, CO is formed by the reverse water gas shift reaction. H2 and CO form a syngas stream. The unreacted H2S is captured in a tail gas treatment unit and recycled back to the plasma reactor. A partial CO2 capture unit is placed downstream of the tail gas treatment unit which is primarily used to adjust the ratio of H2 and CO in the syngas stream to 2-3 for methanol production and 2 for fuel production.

A plasma-enhanced atomic layer deposition method and the associated reactor, the method including a supply of a substrate into a plasma reactor including a reaction chamber, and a plurality of atomic layer deposition cycles on the exposed surface of the substrate, including an injection in the reaction chamber of a precursor based on a first species, a plasma treatment of the exposed surface of the substrate by a plasma by capacity coupling between the plate and the lateral wall of the reaction chamber, by applying a radiofrequency power to the plate. Capacitive coupling makes it possible to create a plasma localised in the vicinity of the substrate, at low and finely adjustable ion energy and density.

The invention relates to a multistage self-adaptive plasma excitation and closed-loop feedback processing system, and relates to the field of environmental engineering. After waste gas enters the system, parameters such as odor concentration, temperature and humidity, ozone and the like are detected in real time by a sensor array, and data are fed back to a control center. The method comprises the following steps: decomposing organic high-molecular compounds by pre-ionization, exciting high-density active particles by a main reaction to thoroughly degrade peculiar smell, and decomposing ozone and small-molecular byproducts by using a nano-catalyst in a deep purification stage. The system adopts PID self-adaptive control, parameters can be automatically optimized according to real-time monitoring data, the removal rate is effectively improved, and the energy consumption is reduced. The processed gas is analyzed again through the secondary detection unit, data are uploaded to the cloud model, energy efficiency and processing strategies are continuously optimized through reinforcement learning, and intelligent and closed-loop management is achieved. The device can be widely applied to the field of industrial waste gas treatment, and has the outstanding advantages of efficient removal, low energy consumption, intelligent self-adaption and the like.

The invention discloses a waste incineration fly ash innocent treatment method and system based on low-temperature plasma, and belongs to the technical field of dangerous solid waste treatment.The waste incineration fly ash innocent treatment method comprises the steps that fly ash and a silicon-aluminum-based conditioner are mixed and granulated and then placed in a low-temperature plasma reactor, and treatment is conducted with air as a discharge medium; high-energy electrons and active free radicals generated by plasmas are utilized to synchronously realize efficient decomposition and mineralization of dioxin organic pollutants in the fly ash and reduction and stable solidification of heavy metal ions; the treated tail gas containing the active substances is cyclically degraded through a cyclone separator, and solid products can be used as safe building material resources; according to the method, one-stop deep detoxification of two typical pollutants in the fly ash is realized, the treatment temperature is low, the energy consumption is low, secondary pollution is avoided, and an efficient solution is provided for safe treatment and value-added utilization of the waste incineration fly ash.

The invention discloses high-purity superfine spherical silica powder as well as a production method and application thereof, and belongs to the technical field of preparation of high-value mineral materials and high-value utilization of industrial solid wastes. The preparation method comprises the following steps: carrying out flotation and acid pickling on silicon sludge to obtain purified silicon powder; the purified silicon powder is subjected to airflow milling and airflow classification, and superfine silicon powder is obtained; in the presence of oxygen-containing gas flow, the superfine silicon powder is fed into a plasma reactor, so that the superfine silicon powder is oxidized and spheroidized at the same time, and the high-purity superfine spherical silicon micropowder is obtained; the volume concentration of oxygen in the oxygen-containing gas flow is 25-60%; and the ratio of the input power of the plasma reactor to the powder feeding rate of the superfine silicon powder is 15-50 kWh / kg. According to the method, based on the material characteristics of the silicon sludge, high-value utilization of the silicon sludge is achieved through whole-process coordinated regulation and control of pretreatment purification, accurate granularity control and energy coupling spheroidization, and meanwhile the method has the advantages of being low in energy consumption, uniform in product granularity, high in purity, good in sphericity degree and the like.

The invention relates to the technical field of gas adsorption materials, in particular to a plasma modified UiO-66-NH2 / activated carbon composite filter material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding activated carbon into a UiO-66-NH2 precursor solution, vacuumizing in a vacuum drying oven for 1-3 hours, then transferring into a reaction kettle, heating to 80-120 DEG C, reacting for 20-25 hours, cooling to room temperature, washing and drying to obtain a UiO-66-NH2 / activated carbon composite material; and placing the UiO-66-NH2 / activated carbon composite material in a plasma reactor, and carrying out plasma treatment by taking H2 / Ar as a working gas to obtain the plasma-modified UiO-66-NH2 / activated carbon composite material. According to the invention, UiO-66-NH2 is loaded in the activated carbon, so that the effects of increasing the specific surface area of the activated carbon and developing a microporous structure are achieved, the adsorption capacity of low-concentration trichloro ethylene reaches 281 mg / g, and the UiO-66-NH2 loaded activated carbon is a filter material for effectively adsorbing trichloro ethylene (TCE).

The present application relates to the technical field of plasma catalysis, and particularly relates to a method for catalytically converting methane and water into methanol and hydrogen under plasma conditions, a device used and a catalyst used. The bubbling-fluidized plasma reactor of the present application is formed by connecting a bubbling corona discharge plasma reactor at the lower part and a fluidized bed dielectric barrier discharge reactor at the upper part in series, and is filled with a catalyst in a discharge channel. Methane mixed with argon is preheated and then enters a gas bubbling column from a raw material inlet. A corona discharge is formed in the gas bubbles by a bubbling tip to generate plasma, so that the methane-water is preliminarily converted in cooperation. The gas after the preliminary conversion is introduced into the discharge channel to react under the action of the catalyst, and hydrogen and methanol are obtained by conversion.

The application discloses a method for catalytic oxidation of carbon monoxide based on plasma hydroxylated high-entropy metal oxide catalytic material, and belongs to the technical field of flue gas treatment. The high-entropy metal oxide catalytic material is filled in a discharge cavity of a plasma reactor, carbon monoxide flue gas is introduced into the discharge cavity, and high-voltage discharge catalytic oxidation reaction is carried out to convert carbon monoxide into carbon dioxide. The method utilizes plasma discharge ionization of water vapor to form a large number of hydroxyl sites on the surface of the high-entropy metal oxide catalytic material to occupy oxygen vacancies, and the hydroxyl sites can promote the decomposition of O3 into active oxygen in the discharge cavity to efficiently oxidize and remove CO components in the flue gas. Meanwhile, the hydroxyl sites and SO2 are acidic components and repel each other, so that the oxygen vacancies are prevented from adsorbing SO2 and being poisoned, the efficiency and stability of the high-entropy metal oxide catalytic material in catalytic oxidation of CO in a humid sulfur-containing sintering flue gas environment are improved, and the method is particularly suitable for treatment of industrial complex flue gas.

The application discloses a kind of plasma reactor and the method for power compensation to focus ring, and plasma reactor includes: reaction cavity, substrate support unit, is arranged at the inside bottom of reaction cavity;Substrate support unit includes: pedestal, which is connected to the radio frequency power supply device located outside the reaction cavity by matching circuit;Electrostatic chuck is arranged on the pedestal;The upper surface of electrostatic chuck is used to adsorb substrate;Focus ring, focus ring surrounds electrostatic chuck;Power regulating device is respectively connected with focus ring and matching circuit radio frequency coupling;Power regulating device includes: series inductance and variable capacitor, for adjusting the impedance of branch where focus ring is located, to adjust the radio frequency power coupled on focus ring, prolong the service life of focus ring, prolong maintenance period.

A nano composite polymer brush production device relates to the technical field of nano material manufacturing equipment, and is formed by connecting a plurality of groups of production units through a transportation mechanism, and each production unit comprises a coaxial magnetic control plasma reactor, a honeycomb microchannel reactor, an acoustic streaming resonance separation tower and a spray drying former, wherein a separation cavity is vertically arranged on a base of the acoustic streaming resonance separation tower, a reducing part at the bottom of the separation cavity is connected to an external container through a heavy phase outlet, the top of the separation cavity is provided with a light phase outlet of a hollow cone of which the top is reduced, and the outer surface of the separation cavity is provided with an Archimedes spiral flow channel which extends from bottom to top and is provided with a plurality of groups of ultrasonic transducers; the bottommost end of the flow channel is connected with the inlet of the separation tower, and the outlet at the topmost end extends into the separation cavity and points to the light phase outlet; through the synergistic effect of the sound field and the Dean vortex, additional fluidization equipment is not needed, directional migration and enrichment of the brush layer nanoparticles can be effectively achieved, and the purity of the produced final product can reach 99% or above.

The invention provides a method for efficiently converting low-quality methane gas into methanol by using a plasma catalysis technology, which specifically comprises the following steps: introducing a mixed gas of methane, air and water vapor into a plasma reactor, and generating a liquid product under the action of plasma. By simulating six low-quality coal bed gas systems with different concentrations of 0.5%, 2%, 4%, 6%, 18% and 30% and introducing water vapor into reaction gas, carbon deposition reaction and generation of nitric acid byproducts are remarkably inhibited. Meanwhile, by optimizing key reaction parameters such as discharge power and water inflow, high-selectivity synthesis of a methanol product is realized, and the selectivity of the methanol product can reach 40.9% or above in a full experimental range. Experimental results show that the method has the technical advantages of mild reaction conditions, high product selectivity, remarkable side reaction inhibition and the like.

The application relates to the technical field of gas filtering materials, in particular to a polyimide film composite material and a preparation method and application thereof, the composite material is mainly made of polyimide and Zn / g-C3N4, Zn / g-C3N4 accounts for 10-20 wt% of the mass of the polyimide; the preparation method is that the polyimide is stirred in a solvent to obtain a polyimide casting solution, then Zn / g-C3N4 is poured into the polyimide casting solution, stirring is carried out at 60-80 DEG C for 8-12 h, cooling is carried out to room temperature for 1-4 h, the defoaming casting solution is poured on a glass plate, a film with a thickness of 50-80 mu m is scraped out by using a coating machine, the scraped film is dried under vacuum at 100-120 DEG C for 8-12 h, peeling is carried out, annealing is carried out at 200-230 DEG C for 8-12 h, the obtained Zn / g-C3N4 composite polyimide film is placed in a plasma reactor for plasma treatment, and the polyimide film composite material is obtained. The polyimide film composite material can be used for efficient purification of helium, high selectivity is achieved while high flux is met, and high stability is also achieved.

The utility model discloses a microwave plasma reactor for diamond synthesis, and relates to the technical field of diamond synthesis. The device comprises a reaction tank, a connecting sleeve is communicated with the surface of the reaction tank, a gas transmission assembly is arranged in the connecting sleeve, a plurality of adjusting pieces are arranged in the gas transmission assembly, the gas transmission assembly comprises a ventilation ring fixedly matched with the connecting sleeve, a hinge seat is slidably matched in the ventilation ring, each adjusting piece comprises a communicating pipe communicated with the ventilation ring, and a gas distribution table is communicated with the end of each communicating pipe; when the reaction tank is used, the motor drives the lead screw to rotate, the lead screw drives the hinge seat to ascend and descend, the hinge rod on the hinge seat pulls the sliding plates to move, and the position of gas input into the reaction tank can be adjusted when the reaction tank is used; the gas transmission teaching affair can be adjusted according to the actual use condition, so that the reaction rate in the reaction tank can be increased, and the working efficiency is improved.

The invention discloses a device and a method for rapidly degrading antibiotics through plasma generated by microwave discharge in a liquid phase. The device comprises a liquid path conveying system, a microwave energy transmission discharging system, a reactor and a gas path control and liquid control system. The liquid path system sends antibiotic wastewater to be degraded to the reactor, the microwave system generates plasmas through discharging, the reactor degrades the wastewater through the plasmas, and the gas path and liquid outlet system regulates and controls degraded gas and water discharge after treatment. The device depends on a liquid-phase microwave discharge technology and has broad-spectrum degradation capacity. A high-temperature and high-pressure environment and an exogenous chemical reagent are not needed, instantaneous breakdown and deep mineralization of wastewater can be realized, and the problems of slow reaction, strong selectivity and easy secondary pollution of a traditional method are solved. The reactor can concentrate microwave energy, a treatment blind area is eliminated, a gas path and a liquid outlet system guarantee controllable discharge, and the service life of equipment is prolonged. The device is driven by electric energy in the whole process, is flexible to operate and provides a green and efficient technical path for antibiotic wastewater treatment.

A continuous-flow plasma-electrochemical system for redox reactions includes a flow-type plasma reactor configured to receive feedstock and to generate an output comprising intermediate species. An electrochemical reactor is configured to receive the intermediate species from the plasma reactor and to generate an output having the desired product (e.g., ammonia).

The invention discloses a plasma activated water preparation system based on fuzzy PID (Proportion Integration Differentiation) adaptive temperature and power matching cooperative control. The plasma activated water preparation system comprises a human-computer interface, a main controller, a temperature / power sensor, a parallel double fuzzy PID controller, an intelligent coordinator, a power / temperature actuator and a plasma reaction machine, a temperature / power sensor sends a water body temperature Tfb and a discharge power Pfb to a main controller in real time, a temperature fuzzy PID controller and a power fuzzy PID controller output suggested powers Ut and Up, an intelligent coordinator outputs a final power instruction and a cooling control signal after arbitration according to a state machine that Tfb is smaller than or equal to Tset normal power, Tfb is larger than Tset and Pfb is larger than Pmin and power is preferentially reduced, and Tfb is larger than Tset and Pfb is smaller than or equal to Pmin and is forcibly cooled. And the power actuator continuously adjusts the discharge power according to the discharge power, and the temperature actuator implements auxiliary heat dissipation, so that the water temperature is accurately locked in the optimal active matter generation interval under the nonlinear and time-varying working conditions, the discharge intensity is ensured not to be lower than Pmin, and high-activity, high-energy-efficiency, continuous and stable plasma activated water preparation is realized.

An air treatment device for removing unwanted substances from air, the air treatment device comprising : a non-thermal plasma reactor stage housing comprising an air inlet for receiving the air to be treated, a plurality of non-thermal plasma reactor units for treating the air and an air outlet for exhausting the treated air from the non-thermal plasma reactor stage housing; wherein each of the plurality of non-thermal plasma reactor units comprises a dielectric substrate having a first surface and a second surface, a first electrode disposed on the first surface of the dielectric substrate and a second electrode disposed on the second surface of the dielectric substrate, wherein the first electrode comprises at least one window exposing the dielectric substrate to the air to be treated in the non-thermal plasma reactor stage housing.

The invention provides a method for efficiently removing an SEI (solid electrolyte interface) membrane of a graphite negative electrode based on plasma activation combined with microbial degradation, which comprises the following steps: discharging and disassembling a waste lithium ion battery, separating a negative plate, crushing, screening and carrying out vortex separation on the negative plate to obtain enriched graphite particles coated with the SEI membrane; placing the graphite particles in a plasma reactor, and activating the graphite particles in a reactive atmosphere; placing the plasma-activated graphite particles in a bioreactor, mixing the plasma-activated graphite particles with a degrading bacterium solution, and carrying out microbial degradation to obtain a degradation product; and filtering, washing and drying the degradation product to obtain the regenerated graphite without the SEI membrane. The method can efficiently remove the SEI film on the surface of the graphite negative electrode, is green and environment-friendly, and protects the graphite structure.

The invention belongs to the technical field of electrode material preparation, and particularly relates to a method for preparing a graphene-transition metal oxide composite electrode material by using plasma. According to the method, the bio-based GO is prepared by adopting supercritical CO2 and microwave assistance, the deposition of the transition metal oxide is carried out through the plasma reactor, and the metal organic salt can be pre-activated by the high energy of plasma, so that the metal organic salt is easier to react and deposit on the graphene surface, and the uniform loading of the transition metal oxide on the graphene surface is realized. In addition, the plasma treatment process is short in time, low in energy consumption and high in preparation efficiency. The graphene-transition metal oxide composite electrode material finally prepared through the method has a large specific surface area and good conductivity, good interface contact is formed between the transition metal oxide and graphene, transmission of electrons and ions is facilitated, and therefore the graphene-transition metal oxide composite electrode material has excellent electrochemical performance.

The invention relates to the technical field of mercury-containing waste disposal and mercury resource recovery, in particular to a mercury recovery device and method. The invention provides a mercury recovery device which comprises a hopper 1, a metering scale 2 located below the hopper 1, a microwave plasma reactor 3 communicated with the hopper 1, a first-stage retarder 4 communicated with the microwave plasma reactor 3, a second-stage main condenser 5 communicated with the first-stage retarder 4 and a third-stage fine condenser 6 communicated with the second-stage main condenser 5. The monitoring system and the tail gas purifier 8 are sequentially communicated with the third-stage fine condenser 6; the mercury recovery device further comprises a collection bottle 7 communicated with the first-stage retarder 4, the second-stage main condenser 5 and the third-stage fine condenser 6. The device provided by the invention can realize rapid gasification and release of mercury in the mercury-containing waste, and efficient condensation in different areas, so that high-purity liquid mercury is directly obtained, and secondary conversion and complex post-treatment are avoided.

The invention discloses a method and a device for recovering sulfur and valuable metals based on plasma cracking sulfide ore in the field of sulfide ore resource recycling, and the method comprises the following steps: step 1) crushing the sulfide ore to 200-400 meshes through a raw material pretreatment system, and premixing the crushed sulfide ore with a carbon source according to a C / S molar ratio of 1.2-1.5; and step 2), feeding the premixed raw materials into a plasma reactor, reacting in a high-temperature field (the temperature of a main discharge region is 8000 + / -500K) generated by a multi-stage arc, controlling the reaction retention time to be 0.5-1.2 seconds, and controlling the high-temperature region to maintain cracking and the medium-temperature region to promote CS2 synthesis through a sectional temperature control module. Compared with a traditional method, the recovery rate is remarkably improved, and the utilization efficiency of sulfide ore resources is greatly improved. And meanwhile, by utilizing the advantage of instantaneous heating of the plasma, the energy consumption is further reduced, the production cost is reduced, SO2 emission is thoroughly avoided, the problem of environmental pollution of traditional pyrogenic process smelting is solved from the source, and remarkable environmental protection benefits are achieved.

The present disclosure provides an abatement device including a foreline plasma reactor, a reagent delivery system configured to provide one or more reagent gases to a foreline coupled upstream of the foreline plasma reactor, and a system controller incorporated within the reagent delivery system and configured to simultaneously control reagent delivery and abatement functions of multiple chambers of a substrate processing tool. The system controller dynamically adjusts a flow of reagent gases based on emission profiles of the multiple chambers. The system controller regulates reagent gas delivery to each of the multiple chambers while simultaneously managing abatement processes to neutralize or capture byproducts.

The invention relates to the technical field of waste gas treatment, and provides a semiconductor industrial waste gas treatment method and system. The method comprises the following steps: controlling a deoxidation reaction unit to carry out deoxidation treatment on the semiconductor industrial waste gas; controlling a gas concentration detection unit to detect the oxygen concentration of the deoxidized waste gas; under the condition that the oxygen concentration is smaller than a first concentration threshold value, the plasma reactor is controlled to carry out plasma treatment on the deoxidized waste gas; and predicting the residual service life of the deoxidizer in the deoxidation reaction unit, and replacing or regenerating the deoxidizer under the condition that the residual service life is less than a service life threshold value. According to the method, pre-deoxidation is utilized, generation of nitrogen oxide is inhibited from the source, the deoxidizing agent is predicted and replaced or regenerated in time by utilizing the remaining service life of the deoxidizing agent, sustainability is achieved, operation of semiconductor high-precision equipment and the yield of products are not affected, and catalytic decomposition efficiency of the nitrogen oxide and energy consumption of thermal decomposition do not need to be considered.

This invention provides a method for preparing graphene quantum dots based on thermal coal and a plasma reaction system, belonging to the field of graphene quantum dot preparation technology. The method includes the following steps: using thermal coal as raw material, it undergoes electrochemical oxidation and KOH ball milling sequentially to obtain pretreated coal; the pretreated coal is introduced into an axial magnetic rotating microwave plasma reactor for segmented temperature-controlled dissociation and recombination reactions; during the reaction, a porous alumina template is used for confined growth, and after the reaction, liquid nitrogen quenching is employed to obtain graphene quantum dots. This invention uses thermal coal to replace high-purity graphite as the carbon source, reducing raw material costs by more than 99%; the pretreatment process, through the synergistic effect of electrochemical oxidation and KOH ball milling, eliminates the need for strong acids and alkalis throughout, completely avoiding the pollution problems of large amounts of acidic and heavy metal-containing wastewater and waste gas generated by the traditional Hummers method, thus aligning with the concepts of green chemistry and sustainable development.