3809results about "Energy based chemical/physical/physico-chemical processes" patented technology

The invention discloses a green preparation process of a microwave-assisted synthesized perovskite semiconductor material, which aims at solving the problems of long reaction period, large reagent dosage, heavy pollution and the like of the traditional perovskite preparation process, adopts a novel organic-inorganic hybrid precursor and green solvent system, and accelerates the reaction by microwave radiation. The rapid and environment-friendly synthesis of the material is realized by accurately regulating and controlling microwave parameters and combining multiple processes such as intermittent and collaborative ultrasonic processes. Novel compounds such as nitrogen-containing heterocyclic borate and organic phosphonate are introduced to optimize the performance of the material. The process significantly shortens the preparation period, reduces reagent consumption, improves photoelectric properties, and enhances material stability.

The invention discloses a disilane mixed gas dissolving and mixing system and a control method, and relates to the technical field of gas mixing preparation, the disilane mixed gas dissolving and mixing system comprises seven modules, a storage module realizes accurate pressure control through a honeycomb gas storage tank matrix, and the tank wall adopts a nano composite structure for corrosion prevention; the premixing module forms a chaotic flow field by using a double-helix micro-channel and pulse injection; the reaction module is combined with supercritical and electromagnetic resonance to accelerate the reaction; the monitoring module fuses multispectral detection; the control system is based on deep reinforcement learning, in addition, a gradient condensation-membrane distillation separation module, a bionic safety interlocking module and other modules are further arranged, and all the modules cooperate to achieve efficient mixing and production. According to the device and the method, high-precision preparation of disilane mixed gas, precise pressure-controlled material storage, molecular-level efficient mixed reaction, multispectral precise monitoring, intelligent regulation and control, stability guarantee, high safety interlocking and intelligent maintenance are realized, faults can be reduced, the product quality and the production efficiency are improved, and the cost is reduced.

A direct air capture (DAC) of CO2 system includes a reaction reactor having a solid, amine-functionalized sorbent configured to sequester CO2 from air; an in-situ dual-function device configured as a CO2 conversion reactor and an exchange fluid regeneration device; and the exchange fluid, recirculating between the reaction reactor and the dual-function device, configured to capture the sequestered CO2 from the solid sorbent in the reaction reactor and release the captured CO2 in the conversion reactor, the exchange fluid including one or more amino acids.

The present application provides a method for generating a micro-scale columnar high-speed acoustic beam in a liquid environment, comprising: a liquid environment; a high-frequency resonator, which generates 0.5-30 GHz ultrasonic waves to act on the liquid environment during operation, generating a directional fluid motion along the direction of propagation of the sound wave in the liquid at the solid-liquid interface, i.e., a columnar focused acoustic beam; the high-frequency resonator is driven to operate in at least one driving cycle with a first power, each driving cycle including a first stage and a second stage, the first stage driving the high-frequency resonator to operate, and the second stage stopping the driving; the magnitude of the first power causes the high-frequency resonator to generate an acoustic beam in the first stage; and the duration of the first stage at the first power is less than the second threshold or the duty cycle of the first stage in one driving cycle is less than the first threshold. Corresponding applications are also provided, such as a method for directional transport of liquids or particles in liquids, and a method for processing target objects.

The invention provides a wind-solar hydrogen production and ammonia synthesis system and a configuration method thereof, electronic equipment and a storage medium. The wind and light hydrogen production and ammonia synthesis system comprises a wind and light hydrogen production subsystem, an ammonia synthesis subsystem and a coordination controller which are relatively independent, the ammonia synthesis subsystem comprises a hydrogen storage tank, the hydrogen storage tank is connected with the wind and light hydrogen production subsystem, and the configuration method of the wind and light hydrogen production and ammonia synthesis system can be executed by the coordination controller. The configuration method of the wind-solar hydrogen production ammonia synthesis system comprises the following steps: firstly, determining capacity configuration parameters of a wind-solar hydrogen production subsystem by taking the minimum leveling hydrogen production cost as a target; and determining the capacity configuration parameters of the ammonia synthesis subsystem based on the capacity configuration parameters of the wind-solar hydrogen production subsystem by taking the maximization of the wind-solar absorption rate, the minimization of the total cost of the system and the minimization of the operation cost of the system as targets. The wind and light hydrogen production subsystem and the ammonia synthesis subsystem are subjected to two-stage decoupling type system configuration, and stable operation of the ammonia synthesis process is ensured while efficient utilization of green electricity is achieved.

The invention relates to the field of treatment and resource utilization of high-carbon-content materials, in particular to a method for preparing graphene at high temperature through electric pulses. The method comprises the following steps: mixing a non-graphitized carbon material and a conductive carbon material to obtain a mixture; pulse current is applied to the mixture, so that the temperature of the mixture is increased to 2000-3000 DEG C, and the mixture subjected to electric heat treatment is obtained; and carrying out cooling treatment on the mixture subjected to the electric heat treatment to obtain the graphene, wherein the carbon content in the non-graphitized carbon material is greater than or equal to 50wt%; the heating rate is 103-104 DEG C / s. According to the method, the carbon atom conversion rate is remarkably increased, the graphene preparation cost is greatly reduced, and meanwhile, the environmental problem caused by a traditional incineration or landfill mode is solved through high value-added utilization of the high-carbon-content waste. Compared with a traditional graphene preparation method, low-cost, high-quality and green preparation of graphene is achieved, the method is suitable for high-valued treatment of various high polymer materials and industrial waste, and a new technical path is provided for large-scale preparation and application of graphene.

The invention belongs to the technical field of energy conversion equipment and solid resource pyrolysis conversion utilization, and discloses continuous replacement type pyrolysis equipment and a pyrolysis method thereof. The continuous replacement type pyrolysis equipment comprises a feeding system, a microwave generating system is arranged on one side of the feeding system, a carbon residue collecting system is arranged at the bottom of the feeding system, a continuous replacement system is installed in the microwave generating system, and a reaction system is installed in the continuous replacement system. One side, far away from the feeding system, of the reaction system is connected with a product collecting system; through the synergistic effect of microwave pyrolysis and dynamic replacement design, pyrolysis of crushed materials and tar cracking are integrated into a continuous process, efficient energy conversion is achieved, high-added-value products such as liquid fuel / chemicals and pyrolysis carbon residues are finally produced, and reduction, harmlessness and resourceful treatment of solid resources is promoted.

The invention discloses a process for synthesizing ammonia by coupling low-temperature plasma with electro-catalysis in the field of clean energy and green chemical industry, which comprises the following specific steps: mixing air and water vapor, feeding the mixture into a dielectric barrier discharge reactor, filling the reactor with a multi-stage heterojunction gradient doped carbon coated catalyst, generating active gas containing NOx under pulse high voltage, and condensing and then entering an electrocatalytic reduction unit. And an electro-catalysis product enters a photo-thermal separation module integrated with a Janus type photo-thermal electrode, the temperature of the electrode is locally increased under visible light irradiation, NH3 desorption is promoted, and finally high-purity ammonia is obtained through polyimide membrane separation. The multistage heterojunction gradient-doped carbon-coated catalyst adopted in the process is prepared through multiple steps and contains gradient-doped boron, sulfur and Au nanoparticles on the surface, NOx adsorption, electron transport and sintering resistance are synergistically improved, and efficient ammonia synthesis under mild conditions is achieved.

The invention discloses a process and a device for continuously synthesizing vitamin D3 through photocatalysis, and relates to the technical field of process on-line monitoring and intelligent control. Photochemical reaction requirements under raw materials with different concentrations are matched through multi-band illumination weight dynamic distribution; when the concentration of the 7-dehydrocholesterol fluctuates, the illumination ratio of 290nm to 305nm wavebands is adjusted in real time by a reinforcement learning algorithm, so that the conversion of a pre-vitamin D3 intermediate is more efficient, and the competitive consumption of a by-product path is reduced; the reaction retention time is further optimized through synchronous flow rate adjustment, and local excessive irradiation caused by sudden concentration increase is avoided; the environment temperature and humidity change is incorporated into a state vector, and the control module generates a compensation instruction accordingly; and if the humidity changes suddenly, pulse type flow compensation is triggered to counteract reaction efficiency attenuation. A closed-loop response mechanism reduces the dependence on physical temperature control equipment, and is especially suitable for mobile production scenes.

The invention belongs to the technical field of hydrogen production, and particularly relates to an electric heating catalyst and an electric heating catalytic ammonia decomposition hydrogen production system. The electrothermal catalyst comprises a catalyst component and a foam alloy electrode, wherein the catalyst component comprises an active metal, a carrier metal oxide and an auxiliary metal oxide; the interior of the foam alloy electrode is of a porous network structure, the catalyst components are uniformly distributed on the outer surface of the foam alloy electrode and the inner wall of the porous network structure, and the thickness of the catalyst components distributed on the outer surface of the foam alloy electrode and the thickness of the inner wall of the porous network structure are both 5-10 microns. The foam alloy electrode is used as a heating unit and a carrier for catalyst growth, catalyst forming is not needed, good heat transfer and mass transfer efficiency is achieved, meanwhile, the electro-thermal catalytic bed design of multiple sections of bed layers is combined, temperature subsection control of the multiple sections of bed layers is achieved, the optimal reaction conditions can be kept at different reaction stages, and the reaction efficiency is improved. Therefore, the reaction efficiency is obviously improved.

The invention discloses a device and a method for promoting methanation of carbon dioxide through temperature oscillation induced by laser scanning. The device comprises a reactor, a laser and a galvanometer, a transparent cover plate is arranged at the top of the reactor, an air outlet is formed in the side surface, and an objective table is arranged in the reactor; a catalyst layer is arranged above the objective table; the catalyst layer is provided with a longitudinally-penetrating gas leading-in hole, a gas flow channel is arranged in the objective table, one end of the gas flow channel is communicated with the gas leading-in hole, and the other end of the gas flow channel is communicated with the gas inlet. Introducing mixed gas containing hydrogen and carbon dioxide into a gas inlet of the reactor, changing the irradiation position of a laser beam emitted by a laser through a galvanometer, and enabling the laser beam to periodically scan and irradiate the catalyst layer to obtain methane. The surface temperature distribution of the catalyst is dynamically regulated and controlled through laser scanning, so that the temperature of a catalytic active site is continuously switched between a high temperature and a low temperature, the thermodynamic limitation of a carbon dioxide methanation reaction can be effectively reduced, and an efficient and stable carbon dioxide methanation process is realized.

The invention provides a super-hydrophobic passion fruit peel carbon aerogel VOCs adsorbent based on low-temperature plasma synergistic nitrogen doping modification and a preparation method thereof, and relates to the technical field of VOCs adsorbents. The super-hydrophobic passion fruit peel carbon aerogel VOCs adsorbent based on low-temperature plasma synergistic nitrogen doping modification is prepared by crushing passion fruit peel, mixing the crushed passion fruit peel with a nitrogen-containing compound to form gel, performing low-temperature plasma modification, performing freeze drying, performing high-temperature carbonization, and performing water washing and drying. The adsorbent is spherical, and the water contact angle is 115.8 degrees to 152.4 degrees. The adsorbent disclosed by the invention has the advantages of super hydrophobicity, high specific surface area, developed microporous structure, excellent VOCs adsorption performance, broad-spectrum adsorption capacity, good reusability and mechanical strength, the preparation method is simple in process, green and environment-friendly, low in cost and good in universality, a new technical scheme is provided for VOCs treatment in a high-humidity environment, and the adsorbent has a good application prospect.

The invention discloses an ultrasonic phased array driven graphene oxide flow stripping and closed-loop regulation and control system and method, and the system comprises an ultrasonic phased array module, and a piezoelectric transducer array element in the ultrasonic phased array module controls sound beam focusing and energy distribution through a phase delay controller, and carries out the stripping of graphite oxide flowing in a flow channel; a micro-Raman spectrometer in the micro-fluidic-Raman detection module collects characteristic peak data of a graphene oxide sheet layer in a micro-fluidic chip in real time and sends the characteristic peak data to a signal analysis unit; and the feedback control module is used for receiving the layer number distribution data output by the signal analysis unit, dynamically adjusting ultrasonic parameters of the phase delay controller, and controlling the diverter valve to guide substandard products into a secondary treatment channel and finally return the substandard products to the flow channel for stripping again. The system and the method for stripping the graphene oxide based on coupling of the ultrasonic phased array and the micro-fluidic chip have the advantages of efficient stripping, accurate detection, closed-loop optimization and the like.

The present disclosure relates to a photoreactor and method of use thereof. In an aspect, the photoreactor can be configured as a solar panel comprising a channel containing a heterogeneous photocatalyst. When water or another hydrogen-containing liquid is pumped through the photoreactor, it contacts the photocatalyst in the presence of UV or visible irradiation, simultaneously releasing hydrogen and separating the hydrogen via a gas-permeable membrane. In an aspect, the photoreactor can be used in a method for continuous production of high-purity H2 gas, the method comprising dehydrogenating tetrahydroquinoline (THQ) to form quinoline under visible light using a Rh / TiO2 heterogeneous photocatalyst. In another aspect, the catalyst includes Rh particles photodeposited on TiO2 microparticles. In a further aspect, the method can include regenerating THQ from quinoline using a water gas shift (WGS) reaction.

The invention relates to MXene-based ammonium glycyrrhizinate / konjac glucomannan / borax self-repairing hydrogel and a preparation method thereof, and belongs to the technical field of gel. The preparation method comprises the following steps: firstly, etching Ti3AlC2 by adopting concentrated hydrochloric acid and lithium fluoride, and carrying out multiple times of centrifugal washing, ultrasonic treatment and vacuum drying to obtain an MXene nanosheet; the preparation method comprises the following steps: preparing ammonium glycyrrhizinate and konjac glucomannan into hydrosol, and dispersing MXene nanosheets into the hydrosol to obtain dispersed MXene nanosheet sol; and adding a borax aqueous solution into the dispersed MXene nanosheet sol, stirring, carrying out ultrasonic dispersion, heating until boiling is started, stopping heating, and carrying out cross-linking in a room temperature environment to obtain the MXene-based self-repairing hydrogel. Due to existence of multiple reversible hydrogen bonds and multiple reversible boron-oxygen bonds in polymer chain segments and among the chain segments in the hydrogel, the acting force among molecular chain segments in the hydrogel is enhanced, the mechanical property and the self-repairing property of the hydrogel are remarkably improved, and meanwhile, the conductivity, the electromagnetic shielding property, the oxidation resistance and the antibacterial property of the hydrogel are improved; good application prospects are realized.

The invention discloses a powder metal particle removing system and method, and the method comprises the steps that powder is transferred into a preset container; mixing the powder materials in the container; putting the mixed powder into a sagger, and sintering to form a crystal structure; the sintered crystal structure is crushed and ground to the required particle size; and metal particles in the crushed particles are subjected to microwave oxidation. According to the scheme provided by the invention, after the powder is transferred into the preset container to be mixed, the powder is sintered in the sagger, then the sintered powder is ground, and finally the ground powder is subjected to microwave heating by utilizing the microwave oxidizer. After the microwave irradiates the powder, the metal particles contained in the powder can be quickly oxidized, the heating speed is high, the efficiency is high, the corresponding metal particles can be effectively removed, and the removal efficiency is high.

The invention provides a method for promoting acquisition of clean fuel by light / sound concerted catalytic degradation of waste plastics and upgrading and conversion thereof, which comprises the following steps: uniformly mixing g-C3N4, cadmium acetate and thioacetamide according to a predetermined proportion, pouring into a reaction kettle, placing in a high-temperature oven for a predetermined time, centrifuging, cleaning and drying to obtain a catalyst, the method comprises the following steps: loading a catalyst on the surface of aerogel, hydrogel or non-woven fabric to obtain an MTSJA-loaded catalyst, treating waste plastic with NaOH, adding the MTSJA-loaded catalyst, stirring under irradiation of a xenon lamp, starting ultrasound for reaction, and carrying out light / sound synergistic catalytic degradation on the waste plastic. According to the method, energy consumption is not needed, toxic and harmful gas is not generated, the purposes of energy conservation and environmental protection can be achieved, meanwhile, carbon dioxide in water can be catalytically reduced to generate clean energy such as methane in the process of degrading the waste plastic, and further obtaining of the energy is promoted.

The invention discloses a method for preparing methylaluminoxane by directly hydrolyzing trimethyl aluminum and a reaction device, and belongs to the technical field of chemical products. Comprising the following steps: introducing low-temperature methane gas containing gas-phase water into a trimethylaluminum organic solution, carrying out hydrolysis reaction under the dual effects of ultrasonic vibration and mechanical stirring and mixing, and filtering to remove solid substances after the reaction is completed, so as to obtain a methylaluminoxane solution. According to the method for preparing methylaluminoxane through direct hydrolysis of trimethyl aluminum, the hydrolysis quality of methylaluminoxane can be guaranteed, generation of gels such as aluminum hydroxide is effectively controlled, and the product yield is greatly increased; and the byproduct methane is high in purity, can be recycled and is free of environmental pollution and energy waste, so that the production cost is remarkably reduced.

The invention relates to the technical field of temperature monitoring, and discloses a temperature monitoring method of a device for preparing biochar by using a Fresnel lens system, and the method comprises the steps: collecting temperature monitoring data in a reaction cylinder, carrying out the abnormal point elimination, sampling consistency correction and sliding smoothing, and generating a temperature trend sequence; dividing the data into a heating section, a stable section and a fluctuation section according to trend change, extracting and constructing a corresponding sample set, and counting a sample proportion to judge a temperature control state; calling historical temperature trajectories to carry out feature comparison, judging whether trend deviation exists or not, and if so, screening similar trajectories to construct a reference trajectory library and a temperature correction parameter set; and adjusting the current trend sequence based on the correction parameters, and outputting a carbonization preparation completion instruction when temperature, time and fluctuation conditions are met. According to the invention, by introducing a multi-stage sample division and trend track comparison mechanism, real-time monitoring and dynamic correction of the temperature control process are realized.

The invention discloses a modified metal oxide catalyst and a plasma coupling electro-catalysis ammonia synthesis system based on the catalyst, cobalt oxide is modified by using radio frequency inductively coupled plasma (ICP) under a vacuum condition and an argon atmosphere, and the cobalt oxide catalyst rich in defects is obtained after discharging is finished. The ammonia synthesis system comprises a plasma activated air system and an electrocatalytic ammonia synthesis system; carrying out plasma discharge on air to generate NOX, cooling, and introducing the NOX into the absorption liquid; the absorption liquid is used as catholyte for electrocatalytic ammonia production in an H-shaped pool, and a cobalt oxide catalyst modified by plasma treatment is selected as a cathode. The cobalt oxide is treated by ICP, so that the problems of low conductivity, inert surface and the like of metal oxide are solved, and the performance of the catalyst is improved. The method solves the problems that plasma air discharge products are complex, and the ammonia yield is low due to the fact that N is equivalent to N cannot be efficiently activated through electro-catalysis.

The invention discloses a method for removing fishy smell of minced fillet and improving gel characteristics based on an electric field effect and application of the method, and relates to the technical field of production of minced fillet products. Comprising the following steps: treating surimi rinsing wastewater by utilizing a low-voltage direct-current electric field to obtain rinsing recovery liquid; rinsing the fresh surimi by using the rinsing recovery liquid, and introducing nitrogen microbubbles in the rinsing process to make full contact with the surimi; and rinsing with clear water, and dehydrating to finish the treatment. According to the method disclosed by the invention, the rinsing recovery liquid treated by the electric field is selected and has a synergistic effect with the introduced nitrogen microbubbles, so that the myofibrillar protein content and the moisture content of the rinsed minced fillet are relatively high, and the fat content and fishy smell substances are obviously reduced; the gel strength of the final gel product reaches 493.03 g.cm and meets the 3A-grade surimi standard (the gel strength is greater than or equal to 400 g.cm), and the quality, color and flavor of the surimi gel are effectively improved; the method is simple to operate, high in efficiency and suitable for industrial production.

The present invention relates to the technical field of ammonia synthesis, and specifically to a device and method for synthesizing ammonia, wherein the device comprises: a microwave power supply, a microwave backflow prevention device, a three-pin dispenser, a microwave coaxial resonant cavity, and a dielectric barrier discharge reactor connected in sequence; the dielectric barrier discharge reactor is connected to a nanosecond pulse power supply, and is filled with a catalyst; a nitrogen source and a hydrogen source are connected to the gas inlet of the microwave coaxial resonant cavity. A mixed gas of nitrogen and hydrogen forms an atmospheric pressure nitrogen and hydrogen microwave discharge plasma at the opening of the microwave coaxial resonant cavity; the generated atmospheric pressure nitrogen and hydrogen microwave discharge plasma acts together with the plasma generated in the dielectric barrier discharge reactor, and under the synergistic effect of the catalyst in the dielectric barrier discharge reactor, ammonia synthesis is achieved, and the gas and catalyst surface temperatures can be separately controlled, and the conversion efficiency and yield of the generated ammonia are high.

The invention relates to an external field intelligent regulation and control photocatalytic hydrogen production integrated device and system. The device comprises a Fresnel lens; the double-layer vacuum glass tube comprises an outer-layer glass tube, an inner-layer glass tube and a vacuum layer located between the outer-layer glass tube and the inner-layer glass tube, and the inner-layer glass tube is connected with an external water source and the separation module; the Helmholtz coil comprises two conductor coils, and the two conductor coils are symmetrically arranged at the two ends of the outer-layer glass tube in a sleeving mode and are communicated with an external power source; the photocatalyst is arranged in the inner-layer glass tube and is positioned at a strip-shaped light band of the sunlight focused by the Fresnel lens; the separation module comprises a hydrogen separation membrane and a gas outlet and is used for efficiently separating gas generated by reaction; the Fresnel lens is connected with the double-layer vacuum glass tube through the fixing support and located on the upper side of the double-layer vacuum glass tube. The Helmholtz coil is used for generating a magnetic field to improve the photo-generated charge separation efficiency in the photocatalytic reaction process, so that the hydrogen production efficiency is improved. The efficiency of photocatalytic reaction hydrogen production can be improved through precise regulation and control of an external field.

A directed energy firefighting device is disclosed to extinguish fires with light, comprising a structured light generator and a directed energy controller for detecting and extinguishing fires remotely and at the speed of light. The device employs structured directed light energy capable of inducing atmospheric avalanche breakdown, generating at least one of sound waves and shockwaves, and dynamically forming space-time acoustic arrays for precise fire suppression. The system may integrate one or more energy sources, including gyrotrons, traveling wave tubes, klystrons, free electron lasers, and others, to produce diffraction-resistant and dynamically structured beams that penetrate through the atmospheric and non-metalic solid physical obstructions. Key features also may include safety mechanisms and artificial intelligence for real-time optimization. Other applications include power beaming, environmental monitoring, medicine, disaster response, and orbital debris clearing are also discussed. A key feature is the ability for arbitrary manipulation of light over large areas.

The invention discloses a device and a method for regenerating a powdery iron oxyhydroxide desulfurizer and purifying sulfur, and the device and the method are characterized in that invalid iron oxyhydroxide is completely reduced into a ferrous oxide and ferrous sulfide after sulfide is added, the reaction of an iron compound is enhanced through ultrasound and stirring, and the separation of the iron compound and the sulfur is promoted. Further fully aerating to fully oxidize the ferrous iron to generate new iron oxyhydroxide; at the moment, the iron oxyhydroxide is in a completely dispersed state, the single particle size is not higher than 1 micron, and small flocs with the particle size of 0-5 microns are formed in laminar water; the surface of the sulfur has hydrophobicity, and the sulfur is gathered to generate hydrophobic self-flocculation, so that large flocs with the particle size of 30-300 microns are formed in the laminar water; the mixture is flushed by water flows with different flow speeds, the iron oxyhydroxide with small particle size is flushed out at a certain flow speed, and the sulfur with large particle size is suspended in the grading pipe, so that the regeneration of the iron oxyhydroxide desulfurizer and the purification of the sulfur are realized.

The invention discloses a bismuth telluride nanopore maskless direct writing preparation method based on electron beam irradiation, and belongs to the technical field of nanometer manufacturing. The method comprises the following steps: firstly, constructing an initial nanopore in a two-dimensional bismuth telluride material by utilizing a converged electron beam; and then the aperture size of the nanopore is accurately regulated and controlled by adjusting the beam density of the electron beam. The method effectively solves the key technical bottlenecks of interface chemical residue pollution caused by a traditional photoresist mask process, intrinsic defect formation caused by high-energy particle bombardment and the like, and breaks through the limitation of an existing etching technology in the aspect of sub-nanoscale structure precision control; precise control of the aperture of the nanopore can be achieved by adjusting the irradiation intensity of the electron beam, and the method has the advantages of being easy and convenient to operate, low in cost, environmentally friendly and the like and can be widely applied to the fields of nanometer electronic devices, sensors and the like.

The invention provides a dielectric barrier discharge reactor with a double-dielectric coating structure, which belongs to the technical field of plasma discharge and dielectric engineering and comprises a DBD (dielectric barrier discharge) power supply, a gas supply and flow control module and a coaxial DBD reactor body. The body is of a coaxial hierarchical structure, a coaxial high-voltage electrode is arranged on the inner side of a hollow quartz tube, a first dielectric layer and a second dielectric layer are attached to and wrap the outer side of the hollow quartz tube to form a radial dielectric constant gradient, a grounding electrode wraps the second dielectric layer, and the two axial ends of the grounding electrode are sleeved with hoops to be clamped and fixed. Two ends of the quartz tube are hermetically connected with PTFE joints with air inlets and air outlets; the DBD power source is electrically connected with the high-voltage electrode through a high-voltage wire, and the gas supply and flow control module is communicated with the PTFE connector through a pipeline. The invention solves the problems of large energy loss and poor discharge stability caused by easy uncontrollable micro-gap between the external electrode and the dielectric tube of the existing dielectric barrier discharge reactor, and is suitable for the scenes of ozone generation, surface modification, plasma catalysis and the like.

The invention belongs to the technical field of photocatalytic oxidation of gaseous alkanes, and particularly relates to a method and system for photocatalytic oxidation of gaseous alkanes, and the method comprises the following steps: under illumination, enabling a photocatalyst, bubbles containing gaseous alkanes and chlorine-containing active substances to react at an interface of a two-phase system containing an organic phase and a water phase to generate an oxidation product, the oxidation product comprises one or more of acid, alcohol and aldehyde, and the organic phase can dissolve the chlorine-containing active substance. The method provided by the invention is beneficial to improving the generation rate of oxidation products and the apparent light quantum efficiency of photocatalytic reaction.

The utility model relates to a sealing structure of supercritical extraction equipment, which comprises a reaction kettle, the outer end of the reaction kettle is sleeved with an end cover, the bottom end of the end cover is fixedly connected with a fixing ring, the outer end of the fixing ring is provided with a sealing groove, the inner wall of the sealing groove is rotatably connected with a sealing ring, and the bottom end of the fixing ring is fixedly connected with a movable sealing assembly. According to the structure, the elastic corrugated sealing ring, the sealing ring and the movable sealing assembly are adopted to form multiple sealing, the movable sealing assembly is matched with the pressurizing ring through the first annular cavity and the second annular cavity, the sealing force is automatically adjusted through system pressure, heat-absorbing expansion liquid in the liquid storage ring can automatically compensate for a heat-expansion and cold-contraction gap, and meanwhile the sealing effect is improved. The piezoelectric ceramic stack is combined with the stirring rod, ultrasonic-mechanical coupling extraction is achieved, mass transfer efficiency is improved, crystals on a sealing component can be removed through the generated cavitation effect, and the ultrasonic-mechanical coupling extraction device has the advantages of being reliable in sealing, high in self-adaptability and the like.

The invention discloses a separated interface photo-thermal catalytic hydrogen production reactor which comprises a liquid storage container, a conveying conduit and a reactor. The liquid storage container is used for accommodating a reaction solution; one end of the conveying conduit is arranged below the liquid level of the reaction solution; the reactor comprises a shell and a porous material arranged in the shell, a thin-layer space is formed by the porous material and the inner wall of the shell, and the thin-layer space is filled with a reaction solution conveyed by the conveying guide pipe to form a thin liquid film; capillary force provided by the porous material is used for sucking the reaction solution in the thin-layer space to the surface of the porous material to carry out photo-thermal catalytic hydrogen production reaction, and the reaction solution in the liquid storage container is supplemented into the thin-layer space through the conveying guide pipe. The reactor separates and decouples a light source and a water source, and is better in space adaptability. The reaction solution is separated from the bulk phase solution, the reaction interface temperature is higher, and the controllability is better. And the photo-thermal catalytic reaction area is not limited by the free liquid surface area of the solution and can be freely expanded.