84 results about "Carbon deposit" patented technology

This invention relates to the field of chemical synthesis technology, specifically disclosing a high-temperature pyrolysis reaction system and its application. The high-temperature pyrolysis reaction system of this invention employs a two-stage reactor design and is filled with a differentiated catalyst. Combined with acetone as an intermediate feedstock between the two stages, it improves the feedstock conversion rate and the selectivity of the target product. The biomimetic integral catalyst solves the problems of poor mass transfer, high pressure resistance, and backmixing caused by traditional packing materials, achieving precise control of the pyrolysis time and inhibiting secondary polymerization and reverse reactions of the product at high temperatures. Through synergistic optimization of reactor configuration, catalyst structure, and separation technology, the entire system effectively suppresses carbon deposition, achieving efficient preparation of dimethyl ketene. This invention forms an integrated high-temperature pyrolysis reaction system from pyrolysis reactor design, catalyst structure design, and improved separation technology, and applies it to the pyrolysis of isobutyric anhydride to produce dimethyl ketene, achieving high feedstock conversion rate and high selectivity of the target product.

This invention discloses a supported zirconium-based catalyst, its preparation method, and its application. It includes a zirconium-based support and a noble metal supported on the zirconium-based support. The zirconium-based support includes one or more of a zirconium-based composite oxide support and a zirconium-based metal-organic framework material. The zirconium-based composite oxide support includes a composite of zirconium oxide and other oxides, and the other oxides include oxides of one or more elements selected from Si, P, Ce, and Mg. The above-mentioned supported zirconium-based catalyst increases the interaction between the supported noble metal and the support by introducing Si, P, Ce, or Mg into the zirconium-based support to adjust the electron cloud density or oxygen vacancy concentration of the zirconium-based support. By using a zirconium-based metal-organic framework material with regular channels to support the noble metal, reactants and products can diffuse relatively quickly and smoothly, thereby avoiding excessive side reactions and carbon deposition caused by excessive retention of reaction intermediates or products.

A direct reduction system and method utilizes a direct reduction shaft furnace to reduce iron oxide using reducing gas received from a reduction / recirculation gas loop. An electro-gas heating system, located in the reduction / recirculation gas loop, heats the reducing gas with supplemental hydrogen and / or natural gas before introducing it into the shaft furnace. The gas heating system sequentially includes: a primary gas heating unit that first heats the reducing gas to a temperature below 600°C or above 700°C using a direct or indirect heating mechanism to avoid carbon buildup in the gas heating system; and a secondary gas heating unit that secondarily heats the reducing gas to a temperature of 900°C to 1100°C using a direct heating mechanism.

The present application belongs to the field of combustible gas, and particularly relates to a composite catalyst, a preparation method thereof, and a method for preparing combustible gas. The preparation method of the composite catalyst comprises the following steps: dissolving humic acid in deionized water to obtain a humic acid aqueous solution, then adjusting the humic acid aqueous solution to be acidic, and finally adding ammonium bicarbonate, zinc chloride and aluminum nitrate into the humic acid aqueous solution and reacting for a period of time at a certain temperature to obtain a solution of the composite catalyst. The method for preparing combustible gas comprises the following steps: dissolving the above-mentioned solution of the composite catalyst in methanol to obtain a mixture, and gasifying the methanol reforming gas into combustible gas. After the composite catalyst aqueous solution and the methanol are mixed, the composite catalyst can be taken away by gasification while performing catalysis in the methanol reforming process, so that the problem of carbon deposition in the equipment is avoided, the efficient catalysis of the equipment is ensured, and the maintenance cost in the later period is reduced.

The utility model relates to diesel engine electronic throttle valve technical field, concretely is a long -life diesel engine electronic throttle valve, including throttle component, install two groups of carbon deposition protection components in throttle component in, the throttle component includes the stay rod, the valve piece of fixed mounting in the stay rod inside and the two guide rods of fixed mounting in the valve piece inside and symmetrical distribution. Through installing two groups of carbon deposition protection components of symmetrical distribution at the both ends of the throat pipe, accompanying the valve piece is turned on one's side, two guide rods on the valve piece will drive two slide posts relative side bending and stretch, two post heads after being stretched finally will drive two inner gaskets shrink to the middle part of the throat pipe cavity, and then will make two filter gas elastic net stretch into the inner eight character structure, thereby can carry out carbon deposition capture to the incoming gas, and the quick reset after the filter gas elastic net loses pressure, and can further improve the separation of the surface carbon of filter gas elastic net under the knocking action of the reverse vane.

1. The name of the design product: air cleaner (funnel type). 2. The use of the design product: used as a filter for a car, filtering out impurities such as dust, metal particles, carbon deposits, etc. in air or lubricating oil. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

This invention discloses a two-step hydrothermal method for preparing nickel-iron bimetallic MOF derivatives and its application. By controlling the precursor structure through a two-step hydrothermal strategy, the nickel-iron bimetallic MOF derivative catalyst forms a foam-like hierarchical porous carbon framework. The metal nanoparticles are uniformly dispersed, small in size, and encapsulated by carbon layers, significantly improving the specific surface area and accessibility of active sites. It exhibits excellent hydrogen yield and anti-carbon deposition performance in plastic pyrolysis tar reforming. The synergistic effect of nickel and iron electrons effectively inhibits metal sintering and carbon deposition, and has good catalytic stability. This invention solves the problem in existing nickel-iron bimetallic MOF derivatives where phase separation easily occurs in one-step synthesis due to the difference in nucleation and growth rates between nickel and iron ions and organic ligands, leading to uneven metal distribution, increased particle size, underdeveloped pore structure, and low accessibility of active sites, thus affecting catalytic reforming activity and anti-carbon deposition ability.

The application belongs to the technical field of catalytic chemistry and porous materials, and specifically discloses a kind of vacancy anchoring full-silicon core-shell monatomic catalyst and its preparation method, the application makes Fe highly dispersed in the form of monatomic through the synergistic anchoring effect of silicon vacancy and ligand, avoids the metal oxide cluster produced by traditional impregnation method, inhibits excessive pyrolysis caused by local overheating, reduces the generation of gas impurities such as low-carbon alkane, the crystalline shell layer of the catalyst shortens the diffusion path of the product dimethyl ethylene ketone, DMK molecules can be quickly desorbed and leave the active center after generation, the content of by-product dimers is reduced, the structure of the catalyst improves the feed rate and accelerates the product diffusion, prevents the secondary reaction of reaction intermediates in the pore, greatly reduces the carbon deposition rate, forms a hydrophobic gradient layer by MTES modification, effectively repels the associated by-products isobutyric acid generated in the reaction, blocks the DMK polymerization reaction, thereby maintaining the yield of the target product DMK.

The present application belongs to the technical field of atomized liquid component design, and particularly relates to an atomized liquid, an atomizer and an aerosol generating device. The atomized liquid comprises, by weight percentage, nicotine 0.1-5%, benzoic acid 0.1-3%, lactic acid 0.1-3%, smoke agent 30-50%, essence 0.8-10%, additive 1-8%, and the rest is solvent. The addition of an appropriate amount of lactic acid in the benzoic acid nicotine salt atomized liquid has a significant effect on the improvement of carbon deposition, and the TPM is relatively stable and has a good taste. The addition of vanillin and its derivatives has a very obvious beneficial effect on the improvement of carbon deposition after the addition of lactic acid.

This invention relates to the field of catalyst preparation technology, specifically to a copper-based catalyst for the hydrogenation of dimethyl oxalate and its preparation method. The catalyst is a Cu / SiO2 catalyst with a copper content of 5-25 wt% as the active component. It is prepared from raw materials such as a silicon source, a copper source, a hydroxyl protectant, and a hydrothermal promoter via a low-pressure ammonia stripping method. During the preparation process, by protecting the silanol hydroxyl groups and optimizing the ammonia stripping and complexation conditions, copper is highly dispersed and stable on the silicon support surface, effectively avoiding copper particle sintering and desilication problems. This catalyst exhibits excellent performance in the hydrogenation of dimethyl oxalate to ethylene glycol. Under reaction conditions of 170℃ and 2.8 MPa, the dimethyl oxalate conversion rate is ≥99%, the ethylene glycol selectivity is ≥97%, and the continuous operating time is ≥3000 h. It can significantly inhibit the formation of byproducts and carbon deposition, extend service life, and simultaneously reduce separation and purification energy consumption and catalyst replacement frequency. The raw materials used are conventional and controllable, and the preparation process is suitable for industrial production, showing broad application prospects.

The application belongs to the technical field of organic chemical synthesis and heterogeneous catalysis, and particularly relates to a catalyst for preparing 2,4-dimethyl-3-pentanone from isobutyric acid or isobutyric anhydride and a preparation method thereof. The application overcomes key technical bottlenecks in the existing gas-phase ketonization reaction, such as serious cracking side reactions, quick deactivation of the catalyst due to carbon deposition, and low selectivity of the target product. The application provides a method for efficiently preparing 2,4-dimethyl-3-pentanone from isobutyric acid or isobutyric anhydride. The method innovatively constructs a modified HZSM-5 molecular sieve catalyst with a micropore-mesopore multi-level pore structure, and introduces specific metal oxide active components to construct acid-base synergistic active centers, thereby realizing directional regulation of the reaction path. The method not only significantly inhibits the competitive monomolecular cracking reaction, greatly improves the selectivity of the bimolecular coupling ketonization reaction for generating 2,4-dimethyl-3-pentanone, but also effectively eliminates the diffusion resistance of macromolecular products by using mesoporous channels, thereby fundamentally solving the problem of easy carbon deposition and deactivation of the catalyst, and having excellent industrial application prospects and technical progress.

The present invention relates to a system designed to enhance the thermomechanical efficiency of internal combustion engines while reducing emissions, noise, and maintenance requirements. The system comprising a booster, soft ferrite coils, a magnetic pick-up, and a feedback mechanism increases energy density within the engine. This enables operation on lean fuel mixtures, continuous removal of carbon deposits, improved combustion, and minimized pressure drops, thereby enhancing efficiency and reducing wear. The system reduces noise, vibrations, and particulate emissions under constant or variable engine conditions. By optimizing fuel consumption and reducing back pressure, it promotes cleaner, quieter, and sustainable engine operation while improving catalytic converter lifespan and achieving overall performance gains.

The utility model discloses a kind of SOC electric pile test systems, for the electrochemical test of SOC electric pile discharging or electrolysis and the detection of carbon deposit in test pipeline, the SOC electric pile is placed in heating furnace;First pressure sensor is arranged on SOC electric pile anode gas inlet pipeline, third pressure sensor is arranged on anode gas outlet pipeline, for detecting the pressure change on SOC electric pile anode inlet and outlet pipeline;Second pressure sensor is arranged on SOC electric pile cathode gas inlet pipeline, fourth pressure sensor is arranged on cathode gas outlet pipeline, for detecting the pressure change on SOC electric pile cathode inlet and outlet pipeline;Gas chromatograph is connected on the SOC electric pile anode gas inlet pipeline or anode gas outlet pipeline, for detecting SOC electric pile anode gas inlet or gas outlet gas composition.This scheme detects pipeline pressure and gas composition simultaneously, monitors the carbon deposit condition of detection system, improves the carbon deposit reaction sensitivity of system.

This invention belongs to the field of hydrogen production technology and discloses a natural gas catalyst cracking hydrogen production process. The system is equipped with a closed-loop circulation transfer system and a non-stop online replacement mechanism. In key stages such as catalyst deactivation and carbon deposit product collection, the overall production process can be completed without stopping the process. The deactivated catalyst can be replaced in a sealed manner, new catalyst can be loaded, and the reaction tank can be reset quickly. Based on the intelligent scheduling algorithm, the transfer path is dynamically optimized. With the flexible sealing docking structure, the process of each station can be seamlessly connected. Furthermore, the core reaction conditions such as feed, temperature, and pressure are stabilized through a multi-parameter collaborative control algorithm to ensure that the cracking conversion efficiency is continuously and stably up to standard, thereby improving the system's capacity utilization and overall production efficiency. The system adopts a three-level interlock self-inspection mechanism to complete the special inspection of all nodes of communication, equipment, sensors, valves, and interlock logic. If any link is abnormal, the entire system will be immediately triggered to stop the interlock and terminate the subsequent processes.

The application belongs to the technical field of petroleum chemical industry, and particularly relates to a germanium modified catalyst for C3-C9 paraffin catalytic reforming and a preparation method and application thereof. The germanium modified catalyst for C3-C9 paraffin catalytic reforming is obtained by adopting an impregnation method to obtain a Ge modified molecular sieve carrier and then using an atomic layer deposition technology to deposit noble metal. The catalyst is prepared by adopting a combination of the impregnation method and the atomic layer deposition, the performance of the catalyst obtained by the method in a catalytic paraffin dehydrogenation and cyclization reaction for preparing aromatic hydrocarbon is better than that of a catalyst prepared by using a single method, the modification of Ge on the active metal is obvious, the hydrogenolysis reaction is inhibited, especially the C1-C4 by-products are inhibited, the selectivity of the target aromatic hydrocarbon is increased to more than 90%, the carbon deposition is obviously reduced, the catalyst life is prolonged, and the catalyst has a good industrial application prospect.

This application relates to the field of vehicle technology and discloses a method, device, electronic device, and storage medium for identifying and cleaning engine carbon deposits. The method includes: acquiring a first rail pressure signal from the engine; performing preprocessing on the first rail pressure signal to obtain a second rail pressure signal; extracting dynamic features from the second rail pressure signal to determine the degree of carbon deposit based at least on the dynamic features and a preset network model; and performing corresponding carbon deposit cleaning actions based on the degree of carbon deposit. This application extracts dynamic features from the first rail pressure signal, and can accurately determine the degree of carbon deposit by combining these dynamic features with a preset network model. It then triggers differentiated carbon cleaning strategies (such as pulse high-pressure fuel injection, injector vibration carbon cleaning, and oxygen-rich combustion) based on the degree of carbon deposit, effectively overcoming the shortcomings of existing technologies in early warning, graded diagnosis, intelligent carbon cleaning, and engineering deployment.

The utility model discloses an alternating current variable pitch system, including three integrated alternating current drivers, three groups of super capacitor module and three alternating current permanent magnet synchronous motors, three integrated alternating current drivers are electrically connected cabin main controller, and integrated alternating current driver has integrated pitch controller, pitch driver and capacitor charger, and integrated alternating current driver is built -in with brake resistance, three groups of super capacitor module are electrically connected three integrated alternating current drivers respectively, three alternating current permanent magnet synchronous motors are electrically connected three integrated alternating current drivers respectively, in the utility model, after direct current variable pitch motor changes into alternating current permanent magnet synchronous motor, can fundamentally avoid carbon deposit and carbon brush wear and tear problem, and is favorable to prolonging the service life of bearing, simultaneously, integrated alternating current driver can reduce intermediate link failure point after integration, namely is favorable to reducing failure rate, in addition, brake resistance can consume the inertia energy generated in the working process, to avoid the harm brought about by inertia energy.

The utility model belongs to the carbon removal equipment technical field of cracking furnace, concretely relates to a carbon scraping head for cracking furnace, include: the cracking furnace body with the feed pipe in the top, be equipped with the liftable carbon scraping head body in the cracking furnace body, the carbon scraping head body is circular ring structure, just the carbon scraping head body is equipped with on the feed pipe, the outside of feed pipe bottom is equipped with the air -jet mechanism, the outside of air -jet mechanism is circular array distribution and has a plurality of air -jet position for air -jet, based on the air -jet makes the top of cracking furnace body form the insulating area that insulates to carbon scraping head body, the air -jet mechanism includes the air pipe and the ring pipe that communicates with air pipe, the utility model discloses through the air -jet mechanism of adding, can form insulating area below the carbon scraping head body through the air -jet mechanism, can avoid the carbon deposition that the equipment produced when using covers on the carbon scraping head body through the insulating area, improves the service life of carbon scraping head body.

This invention relates to a gold-based catalyst for the hydrochlorination of acetylene and its regeneration method, belonging to the field of chemical engineering. The catalyst is prepared by impregnation using microporous activated carbon as a support, loading gold active component HAuCl4, copper additive CuCl2·2H2O, and trichloroisocyanuric acid (TCCA) organic ligand. The regeneration method includes solvent cleaning to remove surface impurities, high-temperature calcination at 600°C under an inert atmosphere to remove carbon deposits, and TCCA solution impregnation to achieve re-oxidation of gold species. This method utilizes the dual-effect function of TCCA to precisely control the electronic structure of gold, avoiding excessive gold reduction and carbon deposition deactivation. After regeneration, the acetylene conversion rate of the catalyst recovers to over 65%, effectively solving the deactivation problem of gold-based catalysts and reducing industrial application costs.

This invention proposes a method and system for avoiding frequent regeneration of particulate matter filters (DPFs), relating to the field of emission control technology. The method includes: Step 1: Obtaining the steady-state differential pressure value after engine regeneration, along with the baseline differential pressure and the standard differential pressure value under the current carbon load; Step 2: Calculating the deviation of the steady-state differential pressure value from the standard differential pressure value and the percentage deviation from the baseline differential pressure; Step 3: Based on the percentage deviation and air velocity, consulting the ash correction map to obtain the current correction coefficient; Step 4: Determining whether the current correction coefficient is less than a preset value. If so, the product of the current correction coefficient and the current carbon load trigger limit is used as the carbon load trigger limit for the next regeneration; otherwise, service regeneration is performed, and the carbon load trigger limit is reset to its initial value after service regeneration. This invention utilizes the deviation between the no-load DPF differential pressure and the differential pressure after regeneration to correct the regeneration limit, ensuring that regeneration only occurs when carbon deposits reach a certain level, avoiding shortened regeneration time or even frequent regeneration due to ash content, thus reducing fuel consumption.

The application discloses a plant fiber wax core material, a wax core and a preparation method, and the plant fiber wax core material comprises plant fiber, a binder, a surfactant and an additive. The plant fiber wax core material adds the surfactant, which helps to enhance the fluidity of the wax liquid, provides uniform and sufficient capillary flow rate for the wax core, makes the candle form a stable wax pool and a burning rate, and reduces the formation of carbon deposition. The preparation method adopts a group blanking and laminating process, a space net structure is formed in the group blanking layer, capillary adsorption of the wax liquid is provided, sufficient area is provided to combine with oxygen in the air, in the combustion process, the flame height is stable, combustion is sufficient, the effect of reducing black smoke is achieved, meanwhile, a certain self-cutting capacity is formed, and the formation of carbon deposition is reduced.

The application discloses an aero-engine fuel nozzle carbon deposition state big data detection system, which comprises a flight data acquisition submodule, a message decoding module, a data storage module, a carbon deposition state analysis module and a carbon deposition characteristic value threshold overrun warning message pushing module, the flight data acquisition submodule acquires engine exhaust temperature state parameters and converts the same into messages, the message decoding module analyzes the messages into field information and saves the same in the data storage module, the carbon deposition state analysis module acquires the messages from the data storage module and analyzes the same, generates carbon deposition state characteristic values and trend visualized graphics and stores the same in the data storage module, the carbon deposition state characteristic value threshold is set in the message pushing module, and subscription and overrun warning pushing based on the carbon deposition state characteristic value threshold are completed. The application can accurately determine carbon deposition occurrence, lock carbon deposition areas, reduce maintenance cost, realize independent detection of fuel nozzle coking carbon deposition in China, and enable airlines to actively formulate scientific and reasonable fuel nozzle replacement plans.

The application provides a catalyst and a preparation method thereof, and particularly relates to the technical field of propylene oligomerization. The catalyst is used in a propylene oligomerization reaction, and the catalyst is a porous silicon zirconium oxide. The specific surface area of the porous silicon zirconium oxide is not less than 260 m 2 / g. The catalyst provided by the application has the advantages that the porous silicon zirconium oxide has high specific surface area, rich mesopore distribution and uniformly dispersed doping structure. The structure significantly improves the accessibility and stability of acid centers, effectively inhibits the beta-scission side reaction and deep polymerization carbon deposition in the propylene oligomerization process, so that the propylene conversion rate is greater than or equal to 64.4%, the nonene selectivity is 45.6-55.6% under the fixed bed reaction condition, and the activity retention rate is not less than 98% after continuous operation for not less than 300 h, which shows excellent catalytic activity, target product selectivity and industrial long-period operation stability.

This invention belongs to the field of catalytic oxidation of HCl, specifically relating to a copper-chromium-zirconium alloy catalyst, comprising copper-chromium-zirconium alloy particles and CeO2. This invention also includes the preparation of the catalyst and its application in the catalytic oxidation of HCl. In this invention, the catalyst can synergistically improve the catalytic activity of HCl, particularly addressing the problem of carbon deposition in HCl catalysts containing organic impurities.

The application discloses a nickel-based catalyst and a preparation method and application thereof, and relates to the technical field of catalysts.The nickel-based catalyst provided by the application takes SiO2 as a carrier, introduces an auxiliary agent M (M is at least one of Ce, La, Mg, Ca or Zr) while loading a Ni active component, and simultaneously introduces an ionic liquid and a surfactant for synergistic control in a preparation process.Through the synergistic effect of the ionic liquid and the surfactant, the application not only improves the dispersion uniformity of the Ni active component and the auxiliary agent on the carrier, but also realizes the synchronous optimization of the interface structure and the pore structure, which is beneficial to promoting the migration of oxygen species and the dynamic oxidation of surface carbon species, inhibiting the generation of carbon deposition and slowing down high-temperature sintering, so as to improve the activity, stability and anti-carbon-deposition capacity of the catalyst in a methane-carbon dioxide reforming reaction.

The utility model discloses a piston of optimization cooling effect, including piston head and piston skirt, the top of piston head has combustion chamber, is equipped with central cooling oil cavity and outer cooling oil cavity in the piston head inside, central cooling oil cavity is located below the combustion chamber, and outer cooling oil cavity is located the outside of central cooling oil cavity, and the both are linked through oil hole channel, and piston skirt is equipped with inlet return oil pipe mounting hole, oil inlet hole and oil return hole, and oil return hole is located the upper center of piston skirt, and oil return hole is connected with central cooling oil cavity and piston inner chamber respectively, and oil inlet hole is connected with piston pinhole and outer cooling oil cavity respectively, and inlet return oil pipe mounting hole place fixed mounting has inlet return oil pipe, and the top of inlet return oil pipe is inserted into outer cooling oil cavity and is higher than the highest position of oil hole channel, and inlet return oil pipe is communicated with piston inner chamber. The above-mentioned one kind of piston of optimization cooling effect reduces the stagnation time of cooling oil, and the cooling effect is better, and can reduce the carbon deposit in cooling oil cavity.

This invention discloses a hierarchical porous ZSM-5 catalyst for the aromatization of plastic oils to prepare benzene, toluene, and xylene (BTX), along with its preparation method and applications, belonging to the field of catalyst technology. The preparation method includes: mixing an aluminum source, an alkaline source, and water to form a solution; adding a structure-directing agent to form a precursor solution; adding an organic solvent and a carbon black pore-expanding agent to the precursor solution to uniformly disperse the carbon black; adding a silicon source to form a synthetic gel and performing a hydrothermal crystallization reaction; separating, washing, and drying the crystallized product; calcining to remove the template agent to obtain a hierarchical porous ZSM-5 molecular sieve; and then subjecting it to ion exchange and calcination to obtain the target catalyst. The catalyst possesses a hierarchical pore structure with both micropores and mesopores, which can effectively improve the diffusion performance of reactants and inhibit the formation of polycyclic aromatic hydrocarbons and carbon deposition. The catalyst of this invention can be applied to the aromatization reaction of plastic oils, exhibiting high plastic oil conversion and BTX selectivity at 300-800℃, demonstrating good catalytic stability and application prospects.

This invention provides a measurement standard sheet and its processing method. The processing method includes the following steps: S1, placing the measurement standard sheet to be processed in the irradiation area of ​​an ultraviolet light generator and irradiating the measurement standard sheet with ultraviolet light; the measurement standard sheet to be processed includes a measurement standard sheet scanned by an electron beam microscope; the wavelength of the ultraviolet light is 100-300 nm, and the irradiation duration is 120-900 s; S2, purging the irradiation area with a protective gas to obtain the processed measurement standard sheet. The processing method of this invention uses a relatively mild photochemical process to quickly remove carbon deposits on the surface of the measurement standard sheet, thereby extending its service life and reducing the operating cost of the measurement equipment; furthermore, it causes minimal physical damage to the surface of the measurement standard sheet, does not cause linewidth changes, eliminates the need to recollect the standard sheet data, and avoids affecting the cleaning and measurement equipment's capacity.