82 results about "Deoxygenation" patented technology

This invention discloses a core-shell bifunctional catalyst, its preparation method, and its applications. The catalyst's deoxygenation core is an oxide containing one or more of the following non-precious metals: Mn, Cu, Ni, Ce, or precious metals: Pt, Pd, Rh, Ru, Au, Ag. The desulfurization shell is an oxide containing one or more of the following: Al, Mg, Zr, Zn, Fe, Ni, Mo, W, Co. This invention addresses the industry pain points of existing low-temperature methanol washing processes in coal chemical industries, such as lengthy syngas sulfur and oxygen purification processes, easy sulfur poisoning and deactivation of deoxygenation catalysts, and direct CO2 emissions from tail gas causing carbon emissions and resource waste. Through a self-developed core-shell bifunctional catalyst, it simultaneously achieves ultra-deep removal of all forms of sulfides and oxygen from syngas within a single reactor, while simultaneously realizing the high-value reuse of CO2 from tail gas.

The utility model relates to the technical field of boiler make-up water, in particular to a gas turbine boiler make-up water deoxidizing and desalting device which comprises a deoxidizing cylinder, a fixing frame is fixedly connected to the outer portion of the deoxidizing cylinder, a deoxidizing assembly used for deoxidizing make-up water is arranged in the deoxidizing cylinder, and the deoxidizing assembly comprises a rotating cylinder rotationally connected to the interior of the deoxidizing cylinder. A first rotational flow plate and a second rotational flow plate are fixedly connected to the exterior of the rotary drum, the length of the first rotational flow plate is larger than that of the second rotational flow plate, and a liquid inlet pipe and a material adding pipe are communicated with the top of the deoxidizing drum. The efficient deoxidization and desalination integration is realized, the problems of large occupied space and non-uniform fluid distribution caused by a split structure of traditional equipment are avoided, the introduction of a rotating structure improves the water flow disturbance, and the deoxidization and desalination process is more sufficient.

This invention relates to the field of environmental remediation technology, specifically providing a method for the synergistic degradation of chlorinated organic pollutants using anaerobic microorganisms and iron-manganese minerals. The method includes the following steps: S1, after deoxygenation, water containing chlorinated organic pollutants is inoculated into a bacterial culture system, and the reaction system is placed in a constant-temperature shaking incubator for anaerobic reaction; S2, iron-manganese minerals are added to the reaction system, and a secondary reaction is carried out under aerobic conditions, thus completing the degradation of chlorinated organic pollutants. This invention significantly improves the overall purification efficiency of complex pollution systems containing chlorinated organic pollutants through an anaerobic-aerobic coupling and a synergistic biodegradation-chemical oxidation strategy, demonstrating promising application prospects.

This utility model discloses an aerobic mixed liquor nitrification and deoxygenation treatment device, including a first nitrification tank. A nitrite-containing bacteria storage tank is located at the top of the first nitrification tank. An inlet pipe is located at the top of one side of the first nitrification tank, and one side of the inlet pipe extends into the interior of the first nitrification tank and is equipped with a sludge-water separation chamber. Through the cooperation of the inlet pipe, sludge discharge pipe, screen, and sludge-water separation chamber, this utility model can separate the sludge mixed in with the mixed liquor during its inflow, while also facilitating the return of the sludge to the treatment tank. Then, through the cooperation of a second discharge pipe, a third pump, a pump installation chamber, a distribution plate, a distribution pipe, a heat dissipation chamber, and a fan, the mixed liquor can be continuously circulated and cooled during the nitrification reaction, thereby maintaining the mixed liquor at 20-30°C to preserve the activity of nitrite-containing bacteria and nitrifying bacteria in the mixed liquor and ensure reaction efficiency.

This invention relates to the field of waste plastic chemical recycling technology, and discloses a waste plastic pyrolysis system and method. The method includes the following steps: (1) deoxygenating waste plastic particles; (2) mixing the waste plastic particles obtained after the deoxygenation treatment with diesel fraction under anaerobic conditions, and then separating the diesel fraction in the resulting mixture to obtain preliminary liquefied plastic; (3) mixing the preliminary liquefied plastic with wax oil fraction under anaerobic conditions, and then separating the wax oil fraction in the resulting mixture to obtain waste plastic liquefied liquid; (4) subjecting the waste plastic liquefied liquid to a viscosity reduction reaction to obtain viscous liquid plastic; (5) heating the viscous liquid plastic and subjecting it to a pyrolysis reaction to generate pyrolysis oil and gas and pyrolysis residue; (6) fractionating the pyrolysis oil and gas to separate rich gas, diesel fraction, wax oil fraction and circulating oil. This invention achieves efficient liquefaction and generates high-value-added products.

The present invention relates to the technical field of target manufacturing and provides a MOS target, a method for manufacturing the same, and a thin-film transistor. The manufacturing method includes the steps of: co-precipitating a mixed salt solution of three types of ions, In, Ga, and Sn, a precipitating agent, and a complexing agent, washing and concentrating the mixture to obtain high-purity indium gallium tin hydroxide colloid; hydrothermally reacting the high-purity indium gallium tin hydroxide colloid with an auxiliary agent, washing and drying the mixture to obtain first indium gallium tin oxide powder; performing a calcination treatment on the first indium gallium tin oxide powder to obtain second indium gallium tin oxide powder; ball-milling the second indium gallium tin oxide powder, a dispersant, an antifoaming agent, and pure water to obtain a slurry; casting the slurry to obtain a molded body; and sintering the molded body under high-oxygen conditions to obtain a MOS target. This invention combines coprecipitation, hydrothermal reaction, and calcination to precisely control the oxygen content of the powder, resulting in slight deoxygenation. This prevents the deoxygenation of In2O3 during the sintering process of the molded body, which would otherwise affect the conductivity of the target by generating In2O or InO.

This utility model discloses a staged purification device for electrolytic hydrogen production, including a purification tank. The purification tank contains a first cylinder and a second cylinder. Several dehydration units are arranged sequentially from bottom to top within the internal region of the first cylinder. A catalytic deoxygenation unit is arranged between two adjacent dehydration units in the region between the first and second cylinders. A heating device is arranged in the region between the second cylinder and the purification tank. An air inlet is located at the bottom of the purification tank. Several first connecting ports and several second connecting ports are provided on the wall of the first cylinder. The first connecting ports connect the catalytic deoxygenation unit to the dehydration unit below it, and the second connecting ports connect the catalytic deoxygenation unit to the dehydration unit above it. A dual-outlet air pipe is located at the top of the purification tank. This utility model can perform multi-stage continuous deoxygenation and dehydration treatment on hydrogen, effectively removing oxygen and water vapor mixed in with the hydrogen, thereby ensuring the purity of the final output hydrogen.

This invention relates to the field of water-soluble polymer materials technology, and discloses a comb-shaped ternary polymer and its preparation process. The polyacrylamide is polymerized from a backbone monomer, anionic monomer, comb-shaped macromolecular monomer, and optional functional reinforcing monomers under the action of a redox and azo-based composite initiation system. The preparation process includes solution preparation and neutralization, deoxygenation and temperature control, adiabatic polymerization, and post-treatment steps, employing a control strategy combining low-temperature initiation and adiabatic temperature rise polymerization. This invention effectively overcomes the defects of traditional linear polymers—low viscosity retention and poor shear resistance—in high-temperature and high-salt environments by introducing comb-shaped side chains to create a steric hindrance effect. The resulting product possesses ultra-high molecular weight, low water-insoluble content, and excellent solubility, exhibiting excellent salt-resistant thickening advantages and mechanical stability, meeting the oil displacement requirements of harsh reservoir environments.

This invention belongs to the field of hollow multi-component nanomaterial preparation technology, specifically disclosing a hollow Cu3NbSe4 nanomaterial, its preparation method, and its application. The microstructure of the nanomaterial is a nanoscale hollow cubic structure. The preparation method includes: (1) dissolving niobium source and selenium source separately in oleylamine solvent by heating for later use; (2) treating the soluble copper source and the niobium source dissolved in (1) in a high-boiling-point organic solvent for deoxygenation and dehydration, and then carrying out a solvothermal reaction; (3) when (2) is heated to a certain temperature, injecting the selenium source dissolved in (1) to carry out a solvothermal reaction, and separating the obtained solid product after the reaction is completed. The synthesis process of this invention is simple, the reaction conditions are mild, and the energy consumption and cost are low; more importantly, it realizes the preparation of hollow Cu3NbSe4 nanomaterial with uniform morphology and size, high crystallinity, and stronger light absorption capacity, and the prepared hollow Cu3NbSe4 shows excellent performance in photocatalytic hydrogen production.

This invention belongs to the field of electrochemical deoxygenation technology, specifically relating to an electrochemical oxygen atmosphere control system and method. The system, from bottom to top, includes a porous bottom cover, a first hydrophobic and breathable membrane, an oxygen-consuming cathode, a liquid-conducting diaphragm, an oxygen-evolving anode, a second hydrophobic and breathable membrane, and a porous top cover. Each component layer forms a zero-gap contact through the clamping force of the outer shell, enabling the device to achieve an ultra-thin thickness. The liquid-conducting diaphragm has a transverse liquid-conducting groove extending to the external electrolyte chamber, utilizing capillary action to achieve rapid electrolyte replenishment and eliminate local hot spots. Through the coupling design between the hydrophobic and breathable membrane and the electrode interface, oxygen generated by the oxygen-evolving anode directly penetrates and overflows in the form of gas molecules, effectively suppressing bubble formation and accumulation in traditional electrolysis processes, and significantly reducing the ohmic resistance of the interface and operating energy consumption. This invention features an extremely thin structure, high reaction efficiency, and no bubble interference, making it suitable for precise oxygen concentration control in spaces such as refrigerators and precision storage environments.

This invention discloses a method for efficiently leaching spent ternary lithium-ion battery cathode powder under anaerobic conditions using metal nanoparticles in synergy with *Lactobacillus plantarum*. It belongs to the field of spent lithium battery recycling technology and includes: 1) preparing battery cathode powder; preparing an anaerobic basal culture medium for *Lactobacillus plantarum* and performing deoxygenation treatment; 2) inoculating *Lactobacillus plantarum* and adding spent battery cathode powder into the anaerobic basal culture medium, leaching and acclimatizing under anaerobic conditions, followed by subculturing, gradually increasing the solid-liquid ratio gradient to acclimatize the bacteria; 3) inoculating *Lactobacillus plantarum* bacteria into the anaerobic basal culture medium and activating them under anaerobic conditions; adding spent battery cathode powder and metal nanoparticles to the anaerobic basal culture medium to prepare a leaching medium, inoculating the activated *Lactobacillus plantarum* to construct a bioleaching system, and co-culturing under anaerobic conditions at 35℃–37℃. Under the synergistic effect of the metal nanoparticles, the bacteria metabolize and mediate the leaching of valuable metals.

The application discloses a high-stability and low-irritation oxytetracycline long-acting injection and a preparation method thereof. 2+ EDTA-2Na and sodium formaldehyde bisulfite are coordinated to stabilize, and forsythia extract reduces irritation; the pH of the finished product is 8.2-8.8. The method comprises acid pre-coordination, pre-filtration, ultrafiltration, reduction and deoxygenation (dissolved oxygen is less than or equal to 2 ppm) and 0.22 mu m terminal sterile filtration. The application realizes long-term clarification and content stability under high loading, and inhibits metal catalytic oxidation and alkali-sensitive degradation.

This utility model discloses a deoxygenation device for boiler water treatment, relating to the field of water treatment technology. It includes a cylindrical body with an inlet pipe fixedly connected to its upper end. A rotating shaft is coaxially connected to the inside of the cylindrical body, and a sliding tube is slidably connected to the rotating shaft. A flow-turbating mechanism is provided on the sliding tube, comprising multiple agitator plates evenly distributed along the circumference of the sliding tube. The end of each agitator plate near the rotating shaft is hinged to the lower end of the sliding tube. A transmission mechanism is provided between the agitator plates and the cylindrical body, driving the agitator plates to rotate around the rotating shaft while simultaneously moving them up and down. The beneficial effect is that the rotating shaft drives the sliding tube to rotate, causing the agitator plates to rotate around the sliding tube, while simultaneously moving the agitator plates up and down, thereby promoting the mixing of the deoxygenating agent and water inside the cylindrical body. This ensures the deoxygenating agent is evenly distributed in the water, reducing the oxygen content and improving mixing efficiency.

This invention discloses a boiler demineralized water tank bubbling deoxygenation device, comprising a tank body and further comprising: an air inlet unit, including a gas distribution component rotatably disposed in the middle of the tank body for injecting inert gas into the tank body, and a drive component disposed below the gas distribution component and located below the tank body for driving the gas distribution component to rotate; and a bubble-cutting unit disposed inside the tank body and located outside the gas distribution component for simultaneously cutting the bubbles formed by the inert gas sprayed into the water by the gas distribution component. By driving the gas distribution component to rotate, the gas distribution component introduces inert gas into the water in the tank in a rotating manner, ensuring sufficient contact between the inert gas and the water. Simultaneously, the drive component also drives the bubble-cutting unit to rotate, allowing the bubble-cutting unit to cut the bubbles of different sizes formed by the inert gas in the water, further ensuring sufficient contact between the inert gas and the water within the bubbles, thereby improving deoxygenation efficiency.

The utility model discloses an anti-skid fixing device for a deoxidizing pipe. According to the anti-skid deoxidizing pipe fixator, an air outlet is formed in the surface of a flow dividing pipe, and rubber pipes are connected to the two ends of the flow dividing pipe; the surface of the shunt pipe is sleeved with the fixed clamping piece, and an anti-skid pad is arranged on the surface of the fixed clamping piece; the check ring sleeves the surface of the rubber tube; by arranging the check ring, after the air outlet is inserted into the nasal cavity of a patient, the rubber tubes at the two ends of the shunt tube are wound around the ears from the two sides of the face of the patient to be hung, then the position of the check ring is adjusted, the check ring abuts against the rear sides of the ears of the patient, at the moment, the check ring is positioned on the surfaces of the rubber tubes through friction force, and therefore the rubber tubes are prevented from moving forwards from the backs of the ears of the patient; the fixing clamping piece is arranged on the surface of the shunt tube, and one end of the fixing clamping piece and the air outlet are inserted into the nasal cavity of a patient together when the air outlet is inserted into the nasal cavity of the patient, so that the air outlet is prevented from being separated from the nasal cavity of the patient.

This utility model relates to the field of static leveling technology, and in particular to a static leveling sealing mechanism and deoxygenation device suitable for damp corridors. The static leveling sealing mechanism for damp corridors includes a sealing box with an open bottom; a blocking block comprising a first blocking wall and a second blocking wall, with a groove formed between the first and second blocking walls, the groove fitting into the bottom of the sealing box; and a separating liquid disposed within the groove. When the bottom of the sealing box is inserted into the groove and contacts the separating liquid, a sealed space is formed within the sealing box, isolating it from the damp environment of the outer wall. The connection between the sealing box and the groove is sealed, and the sealing box isolates the external damp environment, ensuring that the static leveling instrument will not corrode due to the damp corridor environment and that the components inside the sealing box will not have their testing performance affected by the damp environment.

This application relates to a composite deoxygenating membrane and its preparation method, as well as hydrophobic products. The membrane comprises a polymer matrix membrane and a functional layer disposed on the surface of the polymer matrix membrane. The functional layer comprises modified nano-silica, modified nano-zinc oxide, and an aqueous resin. The modifiers for the modified nano-silica and the modified nano-zinc oxide each independently include a silane coupling agent. The mass ratio of the modified nano-silica, the modified nano-zinc oxide, and the aqueous resin is 1:(1-4):(0.5-2.5). The coordinated composition of the components improves the hydrophobicity and antibacterial properties of the functional layer, and provides high deoxygenation efficiency, achieving rapid oxygen removal. Simultaneously, the membrane possesses self-healing capabilities, ensuring the continuity and stability of the deoxygenation function, preventing a sudden drop in membrane performance, extending the membrane's service life, avoiding frequent membrane replacements that could disrupt continuous system operation, and reducing maintenance costs.

This utility model discloses an antioxidant compounding device for feed additives, belonging to the technical field of antioxidant compounding of feed additives. The device includes a support frame for mounting the equipment and a compounding tank fixedly mounted on the support frame. A power shaft is rotatably connected to the top surface of the compounding tank, and multiple sets of stirring rods for mixing feed additive layers are fixed at equal intervals on the outside of the power shaft. An inlet for controlling feed feeding is installed on the upper end face of the compounding tank. A vacuum control instrument is fixedly mounted on the support frame, and a vacuum tube for drawing gas is connected to the vacuum control instrument, which is connected through the compounding tank. A temperature control mechanism for uniform compounding of feed additives is provided in the compounding tank. This device constructs a processing structure that coordinates constant temperature stirring, vacuum deoxygenation, and antioxidant injection, improving the storage stability and mixing uniformity of the final product.

This invention discloses a highly efficient oxygen removal reagent and its application in the deoxygenation reconstruction of carbon resource molecular skeletons, comprising a pivot reagent, a phosphine reagent, an azo reagent, a reducing agent, an acid reagent, a base reagent, a photosensitizer, and an organic solvent; wherein, X in the pivot reagent includes a hydrazine group or a sulfone group; PG is a protecting group; LG is a leaving group; by using natural oxygen-containing functional groups such as alcohols, aldehydes, and ketones as direct coupling precursors, an integrated in-situ activation-deoxygenation coupling process is achieved, significantly reducing reaction steps.

The present application relates to a kind of low-temperature coal tar hydrogenation catalyst for deoxygenation of aromatic hydrocarbon and its preparation method and application.The preparation method includes: the precursor of molybdenum, cationic surfactant, carrier are mixed, after drying, obtain dry product;The dry product is sulfided, to obtain the low-temperature coal tar hydrogenation catalyst for deoxygenation of aromatic hydrocarbon;Wherein, the molar ratio of cationic surfactant and molybdenum is 0.8-1.5;Mo in the catalyst, the mass fraction is 5-20 wt%.The present application also provides the catalyst prepared by the above method and the hydrogenation refining method of coal tar based on the catalyst.The catalyst has higher stacking number, improves the edge / rim site ratio, so that the selectivity of aromatic hydrocarbon in hydrogenation product is improved;Lamella length reduces, the proportion of Mo atom in edge site is higher, higher Mo atom utilization rate and the number of active sites make hydrogenation deoxygenation activity improve.

The present application relates to the technical field of photocatalytic hydrogen production, and discloses a preparation method and application of a cellulose nanocrystal-embedded composite hydrogel photocatalytic material, which comprises the following steps: dispersing a photocatalyst in water, adding 2-methyl-2-propenoic acid-2-(2-methoxyethoxy) ethyl ester, polyethylene glycol methyl ether methacrylate, N,N'-methylene bisacrylamide, cellulose nanocrystals and sodium alginate, uniformly stirring, and then performing deoxygenation treatment; adding an initiator and an accelerator, and heating to perform polymerization reaction; after the reaction, the hydrogel is taken out and soaked in a calcium chloride solution, and finally the composite hydrogel photocatalytic material is obtained. The present application greatly improves the light absorption capacity of the composite hydrogel by embedding cellulose nanocrystals in the hydrogel. Loading the photocatalyst into the composite hydrogel embedded with cellulose nanocrystals can achieve effective dispersion by utilizing the three-dimensional network structure, thereby avoiding the aggregation effect and improving the hydrogen evolution efficiency.

The application discloses a ruthenium-platinum / halloysite nanotube catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst materials and biomass energy sources. The halloysite nanotube is used as a carrier, and a unique tubular structure is used to realize high dispersion of an active component; through a ruthenium-platinum bimetallic synergistic effect, deoxygenation catalytic activity is remarkably improved. The catalyst is used for catalyzing deoxygenation of stearic acid to prepare green diesel, and under the condition that the reaction is carried out at 320 DEG C for 4h, the yield of the green diesel can reach 79.03%. The catalyst has high activity and good stability, and has a wide application prospect in the field of green diesel production.

This invention discloses a method for the hydrogen-free directional conversion of waste oil into sustainable aviation fuel, belonging to the field of sustainable aviation fuel preparation technology. The method includes the following steps: using waste oil as raw material, it is treated by a microwave-assisted degumming and demetallization process to obtain pretreated oil with a total metal content of <5ppm; then, it is fed into a high-gravity rotating bed reactor, where a Ni-Fe-Ce / γ-Al₂O₃-ZrO₂ non-precious metal composite oxide catalyst is used for catalysis. Under conditions of no external hydrogen source and no hydrogen-donating solvent, deoxygenation and directional carbon chain scission are performed to obtain C8~C6 fuel. 16 The straight-chain alkane intermediate was further purified by isomerization under atmospheric pressure using a SO₄²⁻ / TiO₂-Al₂O₃ composite solid superacid catalyst, followed by coupled atmospheric and vacuum distillation to obtain C8~C6 compounds. 16 The distillate is used to produce 100% pure, sustainable aviation fuel. The method of this invention requires no hydrogen addition or precious metal catalysts throughout the entire process, and features high efficiency due to gravity-enhanced reaction, good selectivity of the aviation kerosene fraction, and the product fully complies with national aviation fuel standards and ASTM standards, making it suitable for continuous industrial production.

This invention discloses an online monitoring and intelligent control system for the precipitation reaction process of high-purity cerium hydroxide, belonging to the field of reaction process monitoring and control technology. It includes: a dual-parameter tracing module for the precipitation process, a local oxidation feature capture module, a multi-signal decoupling identification module, and a zoned dynamic compensation execution module. The signals of each module are connected to a PLC control unit. In terms of precise oxidation control, this invention uses the local oxidation feature capture module to monitor dissolved oxygen and ORP values ​​in real time in four high-oxidation-risk areas, including the feeding mixing zone and the eddy shear zone. Combined with the time-series matching algorithm of the multi-signal decoupling identification module, it can accurately distinguish between precipitation disturbances, feeding disturbances, and oxidation disturbances, achieving high accuracy and low false triggering rate. The accompanying zoned dynamic compensation execution module's graded directional pulse deoxygenation strategy reduces inert gas consumption compared to continuous full-reactor aeration, while also avoiding air entrainment problems caused by continuous bubbling.

This invention discloses a method for improving the environmental stress resistance of fish by subjecting them to intermittent hypoxia training. The method includes: maintaining dissolved oxygen (DO) in the water at normoxic levels; setting a fixed time window daily to begin deoxygenation treatment, causing DO to drop to a target hypoxic level within a specified time and maintaining this target hypoxic level for a period of time; subsequently, reoxygenating to restore DO to normoxic levels. This intermittent hypoxia training is conducted continuously, with water quality indicators maintained within a suitable range for the target fish during the training period. After the training is completed, the resistance of the target fish is evaluated. This invention is simple to operate. After intermittent hypoxia training, the LOE threshold of the target fish decreases under hypoxic stress, and their hypoxia tolerance is improved. The fish also exhibit enhanced antioxidant capacity and reduced lipid peroxidation levels under hypoxic, high-temperature, and high-ammonia nitrogen stress, providing cross-protection for fish populations growing under various environmental stresses.

This invention discloses a method for assessing the impact of reservoir construction on river deoxygenation based on satellite remote sensing. The method includes the following steps: constructing a synchronous observation database of river dissolved oxygen and satellite remote sensing reflectance; training a random forest model and an extreme gradient boosting tree model based on input and output data indicators, and fusing them to construct an integrated inversion model for dissolved oxygen concentration; obtaining publicly available river widths and extracting long-term remote sensing reflectance spectral data located along the river's median line; obtaining engineering characteristic parameters of the target reservoir, driving the integrated inversion model for dissolved oxygen concentration, and reconstructing a long-term dataset of river dissolved oxygen concentration; and calculating the trend of dissolved oxygen concentration changes in two time periods, using the construction time of the target reservoir as a dividing point. This invention uses satellite remote sensing to assess the intensity of the impact of reservoir construction on river deoxygenation processes, providing a reliable and scalable assessment method for quantifying the disturbance and alteration of river ecosystems by human activities.

This application relates to the field of pharmaceutical technology, specifically to an apparatus and method for producing water for injection, comprising a condenser, a preheater, a multi-effect evaporation unit, and a degassing tank. The tube side of the condenser is used to receive raw water. The tube side of the condenser, the tube side of the preheater, the multi-effect evaporation unit, the shell side of the condenser, and the degassing tank are sequentially connected. The multi-effect evaporation unit includes a first evaporator, and atomizing nozzles and a first exhaust assembly, both installed at the top of the first evaporator for primary deoxygenation. The apparatus for producing water for injection further includes a second exhaust assembly installed in the degassing tank for secondary deoxygenation. The purpose of this application is to address at least one technical problem mentioned in the background art by providing an apparatus and method for producing water for injection.

This utility model relates to a fixed-bed reactor for lignin pyrolysis, comprising a gas supply unit, a liquid feed unit, a plunger pump, a vaporizer, a first heating furnace, a second heating furnace, and a gas-liquid separator. The gas supply unit is connected to the first heating furnace, the liquid feed unit is connected to the plunger pump, the output end of the plunger pump is connected to the inlet of the vaporizer, and the outlet of the vaporizer is sequentially connected to the first and second heating furnaces. The second heating furnace is connected to the gas-liquid separator. This device can achieve rapid or slow pyrolysis of lignin in an inert gas atmosphere and, with the aid of a catalyst bed, complete selective deoxygenation and coupling reconstruction reactions at high temperatures, providing an experimental basis for the research and preparation of green aviation fuel.

This invention discloses a low-temperature preparation process for sugar-free mint-flavored soda water with high menthol retention rate, belonging to the field of food industry technology. The process includes the following steps: pre-cooling drinking water to 0-4°C to obtain cooling water; pre-cooling mint concentrate to 0-5°C to obtain cooled mint concentrate; adding the cooled mint concentrate to the cooling water under a nitrogen protective atmosphere and mixing; vacuum deoxygenating the mixture to reduce the dissolved oxygen concentration to below 1.5 mg / L; introducing carbon dioxide into the deoxygenated mixture for carbonation, controlling the temperature at 0-8°C; adding sodium bicarbonate and acesulfame potassium to obtain the mint-flavored soda water base; and performing nitrogen-displacement low-temperature filling at 0-8°C to obtain the finished product. This invention, through low-temperature operation throughout, nitrogen protection, and vacuum deoxygenation, effectively inhibits the volatilization and oxidative degradation of menthol, achieving a menthol retention rate of over 90% and significantly improving the product's shelf-life stability.