738 results about "Carbon deposit" patented technology

The invention discloses an engine oil carbon deposition sampling detection method and system based on multispectral imaging, and the method comprises the steps: carrying out the collection of a to-be-processed multispectral image of an engine oil sample under a multispectral light source, and carrying out the preprocessing of the image to obtain a to-be-processed image; performing dark current correction on the to-be-processed image according to a band ratio method, and enhancing the signal intensity of the to-be-processed image; calculating the spectral reflectivity of the to-be-processed image according to the signal intensity of the to-be-processed image; extracting a three-dimensional feature tensor in the to-be-processed image according to the spectral reflectivity; segmenting the to-be-processed image according to the three-dimensional feature tensor, and screening a carbon deposition region; calculating a carbon deposition probability value of each pixel point in the carbon deposition area according to the spectral reflectivity; and setting a carbon deposition threshold value according to the carbon deposition probability value for judgment so as to judge whether carbon deposition exists in the engine oil sample or not. The similarity between the sample engine oil spectral reflectivity and the reference engine oil is reflected, and a possible carbon deposition area is found, so that the carbon deposition defect is accurately judged and identified.

The invention provides a pulse frequency adaptive matching method and system for engine combustion chamber carbon deposition cleaning, and the method comprises the steps: obtaining the carbon deposition degree distribution data, cylinder pressure data and engine vibration signals of a target engine combustion chamber uploaded by an edge calculation node; performing dynamic weight fusion on the carbon deposition degree distribution data and the cylinder pressure data to generate an engine state comprehensive score; the initial pulse frequency, matched with the engine state comprehensive score, of the cleaning equipment is searched for in a preset pulse frequency mapping table; generating a pulse frequency correction strategy according to the engine vibration signal in combination with a pre-trained reinforcement learning model; and dynamically adjusting the initial pulse frequency according to the correction strategy to generate a target pulse frequency, and sending the target pulse frequency to the edge computing node to control the cleaning equipment to execute pulse cleaning according to the target pulse frequency. According to the invention, the carbon deposition removal effect is improved, and the equipment vibration risk is reduced.

The invention provides a preparation method of a catalyst, the catalyst and a diethyltoluenediamine synthesis method based on the catalyst, and belongs to the technical field of chemical synthesis. After the surface of phosphoric acid modified zeolite is coated with aluminum oxide, a layer of quantum dot intercalation metal layered oxide is coated, the surface is modified by polydopamine, citric acid is coupled, cerium oxide and ruthenium oxide are loaded, and the catalyst is prepared. The prepared catalyst can well improve the conversion rate of toluenediamine, inhibit side reactions, improve the anti-coking capability, reduce the generation of carbon deposits, prevent the agglomeration of catalyst particles, prolong the service life, improve the mechanical strength and thermal stability, reduce the activation energy in the synthesis process of diethyltoluenediamine, make the reaction conditions milder, make the yield higher, and reduce the production cost. And the method can be repeatedly used and has a wide application prospect.

The invention relates to the technical field of marine fuel oil additives, and particularly provides a marine fuel oil purification synergist and a preparation method thereof. The marine fuel oil purification synergist comprises the following components in percentage by mass: 8%-12% of a sulfur capturing agent, 15%-20% of a core-shell dispersing agent, 5%-8% of a lubricating agent, 0.5%-1% of an antioxidant, 1%-2% of a pour point depressant and the balance of a solvent. The marine fuel oil purification synergist has the advantages of high flash point, sulfur inhibition, combustion enhancement and dispersion stability. The multi-component synergistic system not only greatly improves the combustion efficiency of the marine fuel oil, but also effectively inhibits the emission of harmful substances, obviously reduces the carbon deposition and wear of an engine, and keeps the cleanliness of a fuel oil system. In practical application, the synergist shows excellent environment-friendly benefits and economic benefits, and a green fuel solution which can meet increasingly strict requirements of environment-friendly laws and regulations and can reduce the operation cost is provided for the ship industry.

The invention relates to high-pore-volume nitrogen-doped activated carbon for capturing carbon dioxide and a preparation method of the high-pore-volume nitrogen-doped activated carbon, and belongs to the technical field of activated carbon. In order to solve the problem that high nitrogen content and high pore volume of nitrogen-doped activated carbon are not matched, the invention provides a preparation method of high-pore-volume nitrogen-doped activated carbon for carbon dioxide capture. In the preparation process of the activated carbon, an activating medium composed of a carbon source and an activating agent and a nitrogen-containing precursor are respectively laid in different mutually isolated areas in a crucible, so that the carbon deposition effect of the nitrogen-containing precursor is weakened, the high pore volume of the activated carbon is maintained, the nitrogen content of the activated carbon is improved, and the high CO2 adsorption capacity and the high CO2 / N2 adsorption selectivity are obtained at the same time. When the high-pore-volume nitrogen-doped activated carbon prepared by the method is applied to the field of industrial CO2 trapping, high CO2 adsorption capacity can be obtained, and high CO2 purity in desorbed gas can be guaranteed.

The invention discloses an automobile carbon deposition driving fault diagnosis method based on deep learning, and relates to the technical field of intelligent diagnosis. Deploying a multi-target dynamic reward function to synchronously calculate a power loss rate reward value, a carbon deposition coverage rate penalty value, a combustion efficiency gradient value and a carbon deposition growth rate gradient value, and outputting a power attenuation diagnosis state through a value iteration optimization strategy network; and receiving the power attenuation diagnosis state and the carbon deposition type classification code through the student model, loading the pre-trained teacher model, adding a confrontation discriminator in the distillation loss function, comparing the characteristic graph distribution difference of the teacher model and the student model, and outputting a grading treatment instruction matched with the vehicle state. According to the invention, by constructing the reinforcement learning agent and deploying the multi-target dynamic reward function, the comprehensive dynamic quantitative evaluation of the carbon deposition driving fault is realized.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for preparing 5-methylfurfural by using 2-methylfuran. The special solid acid catalyst is used for replacing traditional phosphorus oxychloride, hydrogen chloride and phosphorus-containing wastewater are eliminated from the source, and the sulfolane is used for replacing DMF (Dimethyl Formamide), so that solvent residues in the product are reduced. The solid catalyst SO4 < 2-> is modified to form a strong Bronsted acid site (-SO3H) which cooperates with Ce < 3 + > / Ce < 4 + > redox to inhibit carbon deposition, selectively activate 2-methylfuran alpha-C and inhibit side reactions, so that the selectivity and yield of a target product are improved. Na2CO3 neutralization is replaced by electrochemical neutralization, salt slag solid waste is eliminated, and environmental pollution is reduced. After the organic phase is dried and dewatered through a molecular sieve, most of the solvent is removed through rotary evaporation, and the residual crude product is subjected to centrifugal molecular distillation, so that unreacted raw materials and trace impurities are effectively removed, and the product purity is remarkably improved.

The invention belongs to the technical field of industrial combustion safety control, and provides a double-channel industrial furnace gas combustion safety interlocking control system which comprises a gas / air flow ratio dynamic monitoring module, a flue CO concentration online detection module, a double-channel data conflict arbitration processor and a visual human-computer interface. Aiming at the prominent problems of incomplete combustion of coal gas, carbon deposition, detonation risk and the like which are easy to occur under the working condition of accelerated temperature rise, the system integrates visual double-insurance safety control of dynamic calculation of a flow ratio and real-time analysis of tail gas components, and all-directional safety protection in the combustion process is realized through a multi-parameter cooperative monitoring and intelligent interlocking mechanism; the detonation risk is obviously reduced; meanwhile, the air-fuel ratio fluctuation is accurately controlled within the range of + / -5%, and the carbon deposition phenomenon is effectively reduced; and remarkable economic benefits are created while reliable operation of equipment is guaranteed.

The present invention provides a hydrogenation catalyst, and a preparation method therefor and a use thereof. The catalyst of the present invention comprises an active component and a carrier, wherein the active component is composed of Ni, Mo, and P, and the carrier is a composite oxide comprising magnesium oxide, aluminum oxide, and silicon oxide; and on the basis of the weight of the catalyst, the mass ratio of Ni to Mo in the active component is 1.1-5, preferably 1.9-2.3, and Ni is calculated as NiO and Mo is calculated as MoO3. The active component of the catalyst of the present invention contains a high content of nickel. When used for the second-stage hydrogenation of cracked gasoline, the catalyst can be suitable for treating a raw material having a higher diene content, shows relatively strong monoolefin saturation performance and desulfurization and denitrification activity, can effectively inhibit carbon deposition, and has high stability. Therefore, the catalyst of the present invention is particularly suitable for use in industrial production of the second-stage hydrogenation of cracked gasoline or a fraction thereof.

The application discloses a cold plasma microbubble and biomass supercritical water gasification hydrogen production system and method, and belongs to the field of biomass hydrogen production. The system comprises a raw material processing unit, a cold plasma pre-activation unit, a high-pressure subcritical pretreatment unit, a supercritical gasification reaction unit, a gas-liquid separation unit, a hydrogen gas purification unit, a waste heat recovery unit and a circulating water treatment unit. After being pulped, the raw material is modified by the cold plasma pre-activation unit to improve the activity, and then enters the supercritical reactor with a built-in catalytic bed through the high-pressure subcritical pretreatment unit containing plasma microbubble generated active species to complete the gasification. After the product gas-liquid separation, the hydrogen-containing gas is purified to obtain high-purity hydrogen gas, the liquid phase water is purified and reused, the waste heat is recovered to supply system energy consumption, and the circulating water is treated to discharge crystalline salt to prevent salt analysis. The application realizes the deep cooperation of cold plasma and supercritical water gasification, improves the gasification efficiency and hydrogen production selectivity, reduces the energy consumption, tar and carbon deposition, guarantees the stable operation of the system, reduces the comprehensive cost, and is suitable for the industrialization of biomass hydrogen production.

The invention discloses a dispatching method and system based on a distributed diesel generator and a virtual power plant, and relates to the technical field of power systems and energy internet. Comprising the steps that a local control unit establishes an operation constraint model containing a nonlinear fuel efficiency and carbon deposition risk model, and generates a health recommendation domain; the cloud end generates a triple scheduling instruction packet containing reference power, offset bandwidth and weight vectors in combination with power grid constraints; identifying the impedance of a grid-connected point on line at the edge side, and carrying out asymmetric compression correction on the bandwidth based on the voltage sensitivity under a weak grid; and the local unit performs rolling optimization solution under the double constraints of the corrected instruction and the local model, and switches to the anti-carbon deposition autonomous mode containing dummy load input when the communication is interrupted and the carbon deposition risk is high. According to the invention, through cloud-side-end cooperation and hierarchical closed-loop correction, the conflict between the weak network voltage out-of-limit risk and the low-load carbon deposition of the unit is effectively solved, and the safety and the performability of scheduling are improved.

The invention discloses a self-correction method for carbon deposition of a nitrogen-oxygen sensor, relates to the technical field of motor vehicle exhaust emission monitoring, and solves the problems that an existing solution for carbon deposition of the nitrogen-oxygen sensor causes irreversible damage to the nitrogen-oxygen sensor and the compensation error limitation is small. The method comprises the following steps: acquiring driving parameters and real-time NOx concentration of a vehicle, inputting the driving parameters into a constructed driving parameter-NOx concentration related neural network model to obtain predicted NOx concentration, obtaining a difference between the real-time NOx concentration and the predicted NOx concentration to obtain a NOx concentration deviation value, and calculating the NOx concentration deviation value according to the calculated NOx concentration deviation value. And a NOx concentration correction strategy is triggered according to the NOx concentration deviation value to obtain a NOx concentration correction value, and when preset engine parameter conditions are met, the fuel injection quantity is controlled according to the NOx concentration correction value. The phenomenon of insufficient combustion of the engine is reduced, the carbon deposition generation rate is reduced, and the requirement for frequent disassembly and cleaning of the sensor due to carbon deposition failure is avoided.

The invention provides an anti-carbon-deposition Ni-based catalyst and a preparation method and application thereof, and relates to the technical field of catalysts.The preparation method comprises the following steps that nickel salt, metal auxiliaries and aluminum salt are mixed and dissolved and then react through a solvothermal method to obtain a precursor, and the precursor is calcined and reduced to obtain the anti-carbon-deposition Ni-based catalyst; wherein the metal additive comprises at least one of alkaline earth metal and rare earth element. Alkaline earth metal and rare earth elements are added in situ to regulate alkaline sites, so that dispersion of nickel can be improved, catalytic activity of the catalyst can be improved, adsorption and dissociation of CO2 can be enhanced due to proper alkalinity, carbon deposition can be reduced, and stability of the catalyst can be improved.

The invention discloses a monolithic foamed nickel catalyst, a preparation method of the monolithic foamed nickel catalyst and efficient application of the monolithic foamed nickel catalyst in methane dry reforming, and relates to a strategy of in-situ construction of a Ni interface active site monolithic catalyst by taking porous foamed metal as a substrate. The reaction rate of methane dry reforming is improved by utilizing excellent thermal conductivity and abundant three-dimensional channels of a foamed nickel structured metal material, and adverse effects of sintering, carbon deposition and the like on active sites caused by methane cracking and carbon monoxide cracking are balanced; the monolithic catalyst prepared by the invention is applied to a methane dry reforming reaction with a certain concentration, under the conditions that the pressure is 0.1-1 MPa, the mass space velocity is 10000-50000 mL.gcat <-1 >. H <-1 >, CH4: CO2: N2 is 1: 1: 3 and the temperature is 650-700 DEG C, the CO2 conversion rate exceeds 85%, the CH4 conversion rate exceeds 75%, and the monolithic catalyst is expected to be applied to an industrial methane dry reforming process.

The invention discloses a composite catalyst for recovering monophenol from waste fan blades as well as a preparation method and application of the composite catalyst. The catalyst is prepared by taking a beta molecular sieve as a carrier and CeO2-Fe2O3 bimetallic oxide as an active component through a coprecipitation-calcination method. By changing the proportion of Ce < 2 + > / Fe < 3 + >, precise regulation and control of intermetallic interaction can be realized, and the content of active oxygen species and acid sites on the surface of the catalyst is remarkably increased. Meanwhile, due to the ordered macroporous structure of the beta molecular sieve, the shape selectivity of reactants is enhanced, the monophenol yield is remarkably increased, and the problem of carbon deposition in the catalysis process is effectively inhibited. The catalyst has high specific surface area, excellent catalytic activity and cycling stability, and can realize efficient catalytic conversion of waste fan blades within 450-650 DEG C. The process is simple and convenient to operate, low in energy consumption and high in monophenol yield, has both environmental and economic benefits, and provides a new strategy for resource utilization of fan blades.

The invention provides a composite catalyst for supercritical water gasification hydrogen production and a preparation method and application thereof, and relates to the technical field of organic solid waste recycling, the composite catalyst comprises a carrier, an active component and an auxiliary agent; the carrier is prepared from a ZrO2 mesoporous material co-doped with Ce and La; the active component comprises Ni-Co bimetallic nanoparticles, and the Ni-Co bimetallic nanoparticles are subjected to vulcanization treatment to form a core-shell structure in which Ni-Co metal is wrapped by sulfur; and the auxiliary agent comprises MoO3. According to the composite catalyst, a Ce-La-ZrO2 mesoporous material serves as a carrier, Ni-Co bimetallic nanoparticles serve as an active component, a core-shell structure (NiCo at S) is formed after vulcanization treatment, the surface of the core-shell structure is covered with a layer of sulfur atoms, carbon deposition can be effectively inhibited, the chlorine poisoning resistance of the catalyst is enhanced through the added MoO3 auxiliary, and the service life of the catalyst is prolonged.

The invention discloses an SOFC (solid oxide fuel cell) natural gas reforming hydrogen production system, a using method thereof and a power generation system, and relates to the technical field of SOFC stacks, the SOFC natural gas reforming hydrogen production system comprises an injection mixer, a reforming hydrogen production device, a water vapor input pipeline and a natural gas input pipeline, the injection mixer and the reforming hydrogen production device are connected in sequence, and the water vapor input pipeline and the natural gas input pipeline are respectively communicated with the injection mixer; natural gas and water are conveyed into the injection mixer through the natural gas input pipeline and the water vapor input pipeline respectively, are mixed in the injection mixer and then are discharged into the reforming hydrogen production device; comprising an SOFC electric pile, and the SOFC electric pile is communicated with a gas outlet of a reforming hydrogen production device through a pipeline; deionized water enters a water vapor generator to become high-pressure water vapor, the high-pressure water vapor enters an injection mixer according to a certain molar ratio, natural gas with a certain molar ratio is injected, mixed gas with a stable water-carbon ratio is generated, then the mixed gas enters a reforming hydrogen production device for reforming hydrogen production, reformed gas of H2 and CO is generated, and then the reformed gas enters an SOFC electric pile for power generation. The water-carbon ratio can be accurately controlled, the service life is long, the power generation efficiency is high, and carbon deposition is not prone to occurring.

Provided is a method for adjusting lubrication optimization of a marine main engine cylinder based on computer vision, and belongs to the technical field of marine power systems. The method includes: establishing a marine main engine lubrication database for cylinder lubrication analysis and quality evaluation; collecting cylinder lubrication data of each current cylinder, and preprocessing cylinder lubrication image set data; performing image segmentation and cluster analysis on the preprocessed cylinder lubrication image set, and comparing the preprocessed cylinder lubrication image set with the marine main engine lubrication database to obtain feature recognition results of carbon deposition, dirts, scratches and a wear degree; and according to the feature recognition results, evaluating a cylinder lubrication quality to obtain evaluation grades, and adjusting cylinder lubrication optimization according to the evaluation grades.

The invention belongs to the field of energy catalysis and carbon resource utilization, and particularly relates to a self-regeneration perovskite / alkaline earth metal oxide composite bifunctional material and preparation and application thereof. The invention provides a composite bifunctional component formed by Ce doped perovskite A (Ti1-x-yCexNiy) O3 and alkaline earth metal oxide, and an adsorption-catalysis bifunctional material obtained after the composite bifunctional component is subjected to thermal reduction can realize carbon dioxide capture under a high-temperature condition and is converted into synthesis gas (CO and H2) in situ. By introducing Ce, the controllable dissolution and re-embedding process of Ni in ICCU-DRM reaction is promoted, lattice self-repairing and catalytic activity self-regeneration are realized, the stability of carbon dioxide conversion reaction is effectively improved, and the problem of inactivation caused by easy sintering and carbon deposition of a traditional Ni-based catalyst in dry reforming reaction is solved.

The invention provides a range extender control method and a related device, and relates to the field of range extenders. The average power consumption serves as the power generation power of the range extender, the rotating speed reduction operation is executed according to the equal power generation power operation mode, under the equal power generation power, after the rotating speed is reduced, the operation torque is increased, the exhaust temperature is increased, and the carbon deposition crystallization risk can be reduced. And the generated power of the range extender is controlled to be improved from the average power consumption to the target generated power, and the exhaust temperature is further rapidly increased. And the rotating speed increasing operation is executed according to the equal generation power operation mode to increase the rotating speed of the range extender to the first preset rotating speed, the range extender is controlled to operate for the first preset duration according to the first preset rotating speed, the increased electric quantity of the power battery is the first electric quantity, and the operation economy can be guaranteed. The electric quantity of the power battery is subsequently adjusted to be the initial electric quantity before the first electric quantity is increased, and it can be guaranteed that the average generated power under the continuous low-efficiency working condition in the whole cycle period is kept unchanged.

The invention relates to the technical field of catalyst preparation, and provides an ethylene oxychlorination catalyst and a preparation method thereof, and a method for preparing 1, 2-dichloroethane through ethylene oxychlorination. The gamma-Al2O3 and the Y-type molecular sieve are used as the composite carrier, so that the composite carrier has a unique pore structure, adjustable acid-base property and excellent thermal stability to resist formation of carbon deposition. Due to the unique pore structure of the composite carrier, the active components can be more uniformly distributed on the composite carrier, the agglomeration of the active components is reduced, the effective utilization rate of the active components is enhanced, and the high activity of the reaction is kept. According to the ethylene oxychlorination catalyst disclosed by the invention, gamma-Al2O3 and the Y-type molecular sieve are taken as the composite carrier, and the active component copper element is combined, so that the ethylene oxychlorination catalyst can realize oxychlorination of ethylene under normal pressure, the hydrogen chloride conversion rate is high, and the selectivity of 1, 2-dichloroethane is high.

The invention relates to the field of catalyst preparation and discloses a metal molecular sieve catalyst as well as a preparation method and application thereof. The catalyst contains a BCHA molecular sieve and Ni particles packaged in the BCHA molecular sieve, and the Ni particles with the size smaller than 6 nm account for 90%-100%; the BCHA molecular sieve is a boron-containing molecular sieve with a CHA structure, and the BCHA molecular sieve is formed by reaction of a silicon source, a boron source and a template agent. According to the metal molecular sieve catalyst, the BCHA molecular sieve is used as a carrier for loading Ni particles, and meanwhile, the size of the loaded Ni particles is ensured to be less than 6nm, so that the problems of metal sintering, rapid carbon deposition inactivation and the like caused by overlarge size of metal ions in the catalyst in the prior art are solved.

The invention provides low-ash low-sulfur vehicle lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oil. According to the invention, an amphiphilic molecular structure is generated through modified polyisobutylene succinic anhydride and polyamidoamine, a supramolecular ordered film is formed through self-assembly, combustion products and carbon deposition particles are captured, and ash content and sediment generation are reduced, so that the performance requirements of low-ash-content and low-sulfur lubricating oil are met; the reversible reaction of N-(2-aminoethyl) maleimide and 2, 5-bis (aminomethyl) furan is adopted to endow molecular broken bond-recombination self-repairing capability, and micro cracks of a lubricating system are repaired; for the anti-wear agent, UV / O3 is adopted to activate MXene, and multi-step modification of tributyl borate and fluoroalkyl silane is combined, so that the lubricating oil is endowed with low friction coefficient, high thermal stability and excellent dispersing performance, lasting lubrication and effective protection are provided under high-temperature and high-pressure conditions, and lasting lubrication protection under extreme working conditions is realized.

The invention relates to the technical field of diesel engine tail gas treatment, in particular to a mining explosion-proof diesel engine tail gas treatment device which comprises a treatment box body, a tail gas inlet and a tail gas outlet are formed in the two sides of the treatment box body respectively, a splitter plate is arranged in the treatment box body, and a plurality of splitter holes are formed in the splitter plate. According to the device, the entering tail gas is uniformly shunted through the shunting plate, so that the treatment effect of the subsequent purification step is favorably improved. Tail gas often contains impurities such as oil stains and carbon deposition particles, and shunting holes are prone to being blocked after long-time operation. The through mechanism arranged in the device can be automatically started when blockage is detected, the flow dividing hole is physically dredged through the dredging rod, the airflow channel is effectively recovered, the continuity and stability of the tail gas treatment process are guaranteed, the equipment shutdown time caused by blockage is shortened, and the overall operation efficiency is improved.

The invention discloses a Ni-based perovskite type catalyst with a high specific surface area, a preparation method of the Ni-based perovskite type catalyst and application of the Ni-based perovskite type catalyst in methane dry reforming, the catalyst with the composition of Ni / CeAlO3-CeO2 is obtained through two steps of a citrate combustion method and a conventional impregnation method, and Al is introduced into commercial CeO2 with the high specific surface area; ceAlO3 perovskite grown in a calcination reduction process is used for enhancing the stability of a carrier structure and generating interaction with an active component Ni to limit the growth of particles at high temperature, so that the catalyst is obtained, and the specific surface area of the catalyst is 4 times that of a traditional perovskite type catalyst; the dispersion degree of the active component reaches 1.5 times that of a conventional impregnation method supported catalyst, the catalyst keeps the conversion rate of 90% or above at a high space velocity, the reversible transformation step of the perovskite structure enhances oxygen transfer, the purpose of inhibiting reaction carbon deposition is achieved, and only a small amount of carbon deposition exists within 200 hours of a stability test. The preparation method is simple, easy to implement, economical and environmentally friendly, and the prepared catalyst is high in activity, good in stability and suitable for large-scale industrial production.

The invention discloses an energy storage type vertical fluidized bed fluidized bed furnace which comprises a combustion chamber, a dust remover and a settling chamber independently arranged between the combustion chamber and the dust remover. An inlet and an outlet are symmetrically formed in the two sides of the settling chamber, a smoke pipeline is arranged at the top of the combustion chamber and communicated with the inlet, the dust remover is provided with a cyclone pipeline, the cyclone pipeline is communicated with the outlet, and the sectional area of the outlet is larger than that of the inlet; a partition plate extending downwards from the inner wall of the top of the settling chamber enables the inner space of the settling chamber to form a U-shaped flow channel, the U-shaped flow channel comprises a first flow channel, a bottom flow channel and a second flow channel, and an inverted-cone-shaped inner cavity is formed below the bottom flow channel. According to the invention, secondary combustion of unburnt particles before entering the dust remover is realized, the combustible content in the flue gas is obviously reduced, the carbon deposition risk of subsequent dust removal equipment is reduced, the temperature of the flue gas entering the dust remover is reduced, and the service life of the equipment is prolonged.

According to the nickel-based catalyst and the preparation method and application thereof, through Ga modification, the methane cracking depth can be reduced, and then carbon deposition is effectively inhibited; ceO2 oxygen vacancies can effectively activate CO2, the generated intermediate oxygen species O further reacts with deposited carbon so as to achieve the purpose of carbon cleaning, the GaxNi / CeO2 catalyst is prepared by adopting a urea homogeneous precipitation method, 1000-hour long-term stable catalytic conversion of the nickel-based catalyst in a carbon dioxide methane dry reforming reaction is achieved, and the catalyst has the advantages of simple process, low cost and high efficiency. The nickel-based catalyst prepared by the method can keep good catalytic stability.

The invention relates to a catalyst for preparing cyclododecanone through cyclododecanol dehydrogenation and a preparation method and application thereof. The catalyst component comprises copper, zinc, zirconium, sodium, calcium, aluminum and iron; the catalyst is prepared from the following components in percentage by mass in an oxide form: 40 to 65 weight percent of copper oxide, 10 to 21 weight percent of zinc oxide, 10 to 30 weight percent of zirconium oxide, 5 to 20 weight percent of sodium oxide, 1 to 5 weight percent of calcium oxide, 0.5 to 1.5 weight percent of aluminum oxide and 0.05 to 0.5 weight percent of iron oxide. In one embodiment, according to the preparation method of the catalyst provided by the invention, water vapor is added during roasting in a nitrogen environment, so that the release speed of carbon dioxide is controlled, and formation of carbon deposition in the roasting process is reduced. The catalyst can solve the problem of low selectivity caused by low dehydrogenation reaction conversion rate and many by-product cyclododecene, and has the characteristics of high strength, good hydrothermal resistance, long service life and the like.

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.

The invention discloses a catalytic slurry oil hydrogenation catalyst and a preparation method thereof. The catalyst comprises an alumina carrier containing an auxiliary agent, MoO3 and CoO, the carrier has bimodal pore size distribution, the smaller pore size is intensively distributed at 10-40nm, the pore volume of pore channels with the pore size of 10-40nm accounts for 20%-40% of the total pore volume, the larger pore size is intensively distributed at 150-400nm, and the pore volume of pore channels with the pore size of 150-400nm accounts for 30%-50% of the total pore volume. The catalyst disclosed by the invention is arranged between a hydrogenation protective agent and a hydrogenation desulfurizing agent in a catalytic cracking oil slurry hydrogenation reactor to play a role of connecting the previous part and the next part, so that primary removal of sulfur impurities in catalytic cracking oil slurry is realized, more deposits such as carbon deposits can be accommodated, and the running period of a device is prolonged.