368 results about "Adsorption energy" patented technology

The invention discloses a method for predicting the catalytic activity of a bimetallic supported catalyst in a CO2RR reaction, and belongs to the technical field of computational material science and catalytic materials. The method comprises the following steps: constructing a spatial configuration of TMCu / W2CO2 with double metal atoms (TMCu) loaded on the surface of W2CO2; a relaxation configuration with the distance between TM atoms and Cu atoms smaller than 3.0 is screened out; calculating the adsorption energy Eads of adsorbing CO2 at different sites, and screening out a catalyst model with strong adsorption capacity on reactants; the optimal path in the reaction process is determined, the limiting potential UL of the surface of the catalyst is calculated based on the maximum value of the Gibbs free energy change delta G in the optimal path, and the UL is used for predicting the activity of different TMCu / W2CO2 surface electrocatalysis CO2RR. According to the method, screening standards taking the distance between double metal atoms, the binding energy of double metals, the adsorption energy of CO2 and the limited potential as the core are established, a low-efficiency system is rapidly eliminated, the experiment trial and error cost is reduced, and the development efficiency of the catalyst is improved.

The invention belongs to the technical field of chemical catalysis, and particularly relates to a preparation method of an alkali metal cation modified cobalt-nitrogen-carbon monatomic catalyst and application of the catalyst in electrosynthesis of hydrogen peroxide. The Co-N-C / X catalyst is obtained by taking a cobalt-containing compound as a metal source, mixing the metal source with a nitrogen-containing organic matter and a carbon material, performing rotary evaporation, grinding and high-temperature pyrolysis in an inert atmosphere, performing acid washing with strong acid to construct surface defects, and finally performing stirring adsorption with an alkali metal salt solution, suction filtration and drying. Alkali metal cations are physically adsorbed and anchored on the surface and interface of the Co-N-C catalyst instead of being dissolved in a solution, so that the electronic structure of Co active sites and the adsorption energy of the * OOH intermediate are optimized, and the problem of separation of alkali metal and a product is solved. When the catalyst is used for electro-catalytic oxygen reduction reaction, the H2O2 selectivity reaches up to 98%, the preparation process is simple, the cost is low, large-scale production can be realized, and the problems that the traditional method is high in energy consumption and large in pollution and the existing catalyst is insufficient in selectivity are solved.

The invention discloses a multi-component catalyst active site prediction system and method fused with quantum embedding, and relates to the technical field of catalysis and material informatics, and the system comprises a structure and site enumeration module which generates candidate sites; the adaptive quantum embedding calculation module obtains key reaction microcosmic parameters; the unified site fingerprint and feature engineering module constructs and fuses standard site fingerprints; the physical consistency machine learning module predicts adsorption energy and other parameters and uncertainty thereof; the active learning and sample selection module selects a high-value sample optimization model; the microdynamics evaluation module calculates index values such as activity; and the multi-objective optimization and sorting module generates an optimization sorting list. According to the method, the unification of calculation precision and efficiency is realized, the problem of non-unification of locus characterization is solved, the model interpretability and extrapolation reliability are improved, and the comprehensive evaluation and optimization sorting of multi-target performance are completed.

The invention belongs to the technical field of oil and gas exploitation, and relates to a nanometer desorbing agent for a gas well and a preparation method thereof.The desorbing agent is prepared by using biochar subjected to special pretreatment as a core carrier, loading bimetallic oxide nanoparticles in a specific proportion and carrying out surface modification with an environment-friendly surface active agent. Through the synergistic effect of the nanometer size effect, the catalysis / electron transfer effect of the metal oxide, the physical adsorption and pore transport effect of the biochar and the interfacial tension reduction effect of the surfactant, the adsorption energy barrier of gas molecules such as methane on the rock surface is remarkably reduced, and efficient desorption of the gas molecules is promoted. Meanwhile, all the components and the preparation process are environment-friendly and harmless to a human body.

The utility model provides a multi-layer cold trap device. The multi-layer cold trap device comprises a first shell, a second shell, a third shell, an air inlet pipe and an air outlet pipe, wherein the second shell is arranged in the first shell, and a medium space is formed between the first shell and the second shell. A medium cavity is formed in the third shell, the third shell is arranged in the second shell, and a flowing space is formed between the second shell and the third shell. The air inlet pipe and the air outlet pipe are respectively communicated with the flowing space, so that extracted air can sequentially flow along the air inlet pipe, the flowing space and the air outlet pipe. Low-temperature media are placed in the medium space and the medium cavity at the same time, cold faces are formed on the inner wall of the second shell and the outer wall of the third shell, namely, double cold faces are formed in the flowing space, the area of the cold faces in the flowing space is enlarged, and the contact area of the cold faces and gas flowing through the flowing space is enlarged. Furthermore, gas molecules flowing through the flowing space are captured, the adsorption capacity of the cold trap is improved, and the vacuumizing efficiency is improved.

The invention discloses a handheld oxygen generator in the field of oxygen generation equipment, which comprises an air pump assembly, an air inlet assembly, an air outlet assembly, molecular sieve tanks and an oxygen storage tank, a pressure preparation gas tank is arranged on a gas path structure between the two molecular sieve tanks and the oxygen storage tank, and oxygen-enriched gas adsorbed by the molecular sieve tanks firstly enters the pressure preparation gas tank to be stored and then enters the pressure preparation gas tank to be stored; and after the gas in the pressure preparation gas tank reaches the required pressure, the gas enters the oxygen storage tank. In the oxygen production process, gas can generate standby pressure in the standby pressure gas tank, so that the pressure of the molecular sieve tank is kept in a high-pressure range, the adsorption capacity of the molecular sieve on nitrogen in air is improved, the oxygen content of the oxygen production gas is improved, and the oxygen production amount can still be met under the condition that the filling amount of the molecular sieve is reduced; therefore, the sizes of the molecular sieve tank and the whole oxygen generator are reduced. In addition, oxygen is collected through the pressure preparation gas tank, oxygen is conveyed to the oxygen storage tank after certain pressure preparation is achieved, oxygen in the oxygen storage tank can be promoted to be collected, the pressure is increased, and the oxygen output requirement in the oxygen using state is met.

The invention discloses a method for screening a high-catalytic-activity nitrogen-doped graphene-loaded single-metal-atom ammonia synthesis catalyst, and belongs to the technical field of ammonia synthesis. The method comprises the following steps: constructing an original graphene configuration; constructing a nitrogen-doped graphene configuration; a nitrogen-doped graphene loaded monometal configuration is constructed; the Eform is formed to judge the stability; constructing an adsorption configuration of reactant molecules; analyzing the relaxation configuration to judge the activation degree; the adsorption stability is judged according to the adsorption energy Eads; determining a path of N2 thermal reduction reaction; adopting NEB and Dimer methods to construct a transition state spatial configuration; reaction heat and activation energy are calculated, and activity differences of different catalyst surfaces are analyzed. Based on density functional theory calculation, catalyst screening standards with formation energy, adsorption energy and activation energy barriers as indexes are established, the high-activity catalyst is screened out theoretically, the experiment trial and error cost is reduced, and the catalyst development efficiency is improved.

The invention discloses a screening method of insulating gas decomposition product sensing materials based on machine learning, and relates to the technical field of functional material design and gas sensing. The method provided by the invention comprises the following steps: selecting a first candidate sensing material according to an insulating gas and a decomposition product; doping elements or embedding atoms into a central cavity of the first candidate sensing material to obtain a second candidate sensing material, and constructing a candidate sensing material library; obtaining the most stable adsorption configuration and adsorption energy of gas molecules, constructing feature descriptors, forming an initial data set, and dividing a training set and a test set; constructing and training a model, and evaluating and screening out an optimal model by using a test set; predicting and screening the second candidate sensing material by using the optimal model to obtain a third candidate sensing material; and performing DFT calculation verification and performance index evaluation on the third candidate sensing material, and outputting a final candidate sensing material. The method provided by the invention is high in prediction accuracy and reliability, and a novel sensitive material can be found.

The invention relates to the technical field of separation, and discloses a molecular sieve separation system for medical oxygen production, which comprises an adsorption separation group, a fluid control valve group, a pressure monitoring unit and a self-adaptive control center, the self-adaptive control center executes capacity locking logic and regeneration clamping logic based on fluid impedance fingerprint characteristics, monitoring the actual pressurizing duration of the adsorption pressurizing stage in real time, calculating a deviation value between the actual pressurizing duration and the reference adsorption duration, and generating a primary switching instruction; meanwhile, the real-time residual desorption pressure of the other adsorption bed layer is obtained and compared with a regeneration end point pressure threshold value, a final step sequence switching instruction is output when the conditions are met, and self-adaptive locking of the real adsorption capacity of the molecular sieve is achieved by recognizing the adsorption capacity saturation characteristics and decoupling gas source fluctuation.

The invention relates to an alkali metal gas chamber anti-relaxation self-assembly molecular coating adsorption energy quantification method, which finally realizes the physical quantification of the anti-relaxation coating adsorption energy by establishing a contact angle and surface topography collaborative characterization model and combining an adsorption-desorption dynamic formula, and is characterized by comprising the following steps: 1) establishing a contact angle and surface topography collaborative characterization model; depositing organosilane on a gas chamber glass substrate by adopting a liquid phase self-assembly method to form an anti-relaxation coating sample; step 2, selecting a plurality of measuring points on the anti-relaxation coating sample, dropping a 1 [mu] L ultrapure water liquid drop on each measuring point, determining a polarization retention angle of each measuring point according to the liquid drop height and the liquid drop substrate radius obtained by a contact angle measuring instrument, and scanning a local area of the corresponding measuring point by using an atomic force microscope (AFM), extracting an arithmetic mean value Ra of the surface roughness parameter and a root-mean-square value Rq of the surface roughness parameter as quantitative indexes of the polarization maintaining cross section; and step 3, taking free energy formed by the molecular layer of the coating as coating adsorption energy delta G.

The invention discloses a method for predicting the coverage degree of an H ion negative electrode in a Zn aqueous battery, and relates to the technical field of surface catalysis. In order to solve the defect that in the prior art, it is difficult to accurately predict the coverage degree of H ions on the surface of a Zn negative electrode on a multi-scale level, the technical scheme provided by the invention comprises the steps that a three-dimensional atom structure model of H atoms and a Zn electrode adsorption surface is constructed, formation energy and adsorption energy of the H ions and water molecules are calculated, and a reaction potential energy surface is established; constructing a reaction path and an electron transfer behavior, defining potential related parameters, and outputting reaction rate, current density and coverage data; establishing a phase field dilute material transfer model containing temperature, pH and pressure parameters, and completing material migration and charge distribution calculation; interface physical field parameters are fed back to the microdynamics model to form microcosmic-macroscopic bidirectional data interaction and realize self-consistent convergence; and outputting a coupling model result to obtain multi-scale prediction data. The method is suitable for active site identification and performance prediction in electro-catalytic reaction.

The invention discloses a method for researching the corrosion resistance behavior of zinc alloy based on a first principle. The method comprises the following steps: firstly, retrieving a zinc primitive cell model from a material database and carrying out structure optimization; performing crystal face cutting, cell expansion and re-structure optimization to obtain a zinc plate model; then aluminum atom random replacement doping processing is carried out, and optimization is carried out to obtain a doping model; performing static self-consistent calculation to obtain surface energy, and screening out the most stable doping model; fixing two layers of atoms at the bottom of the most stable doping model, performing chloride ion adsorption calculation and structure optimization, and calculating adsorption energy to determine a most stable adsorption site; and finally, carrying out electronic structure calculation of state density and a work function, and representing the corrosion resistance of the zinc alloy. According to the method, a zinc alloy corrosion micromechanism is deeply analyzed, theoretical guidance is provided for component optimization and corrosion resistance improvement, and compared with a traditional experimental method, the research and development cost and time are remarkably reduced, the research efficiency is improved, and the method has important theoretical and practical application value.

The invention provides a device and a method for reducing exhaust loss by using the pressure of a liquid hydrogen storage tank, and relates to the technical field of liquid hydrogen storage and transportation safety. The device comprises an adsorption storage assembly, a desorption recovery assembly and an adsorption enhancement assembly which are arranged in a gas pillow of the liquid hydrogen storage tank. The adsorption and storage assembly is communicated with the air pillow through a one-way mechanical low-temperature valve, is internally provided with a solid adsorption material and a vacuum heat insulation cylinder, and is used for adsorbing and storing evaporation gas and reducing the tank pressure when the tank pressure is increased; the adsorption enhancing assembly comprises a low-temperature hydrogen regulating valve and a low-temperature heat exchanger, and the throttling effect of high-pressure hydrogen in the tank is used for refrigerating an adsorption material, so that the adsorption capacity of the adsorption material is improved; the desorption recovery assembly heats an adsorption material through an intermediate heater, and controllable release of hydrogen is achieved. According to the invention, the active management of the pressure of the liquid hydrogen storage tank and the efficient recovery of the boil-off gas are realized, the exhaust period is obviously prolonged, the hydrogen loss is reduced, and the storage and transportation economy and safety are improved.

The invention relates to a preparation method and application of an alkali-activated iron tailing geopolymer adsorbent. According to the method, an iron tailing geopolymer is prepared through an alkali activation method, that is, an aluminosilicate structure in iron tailings is destroyed in an alkali activation mode, so that silica tetrahedron and alumina tetrahedron structures of the iron tailings are reconstructed, and a geopolymer material with adsorption capacity is prepared; on the basis, a foaming agent hydrogen peroxide solution is introduced to adjust the performance, and parameters such as modulus, water cement ratio and curing temperature of the alkali activator are respectively adjusted to prepare an optimal sample. The iron tailing geopolymer adsorbent material which is high in adsorption rate and good in stability is obtained, and the effect of adsorbing residual ciprofloxacin in wastewater is remarkable.

The utility model provides a kind of air purification drying device for bottle blowing, it is related to bottle blowing processing technical field, and it includes: box body;The box body is fixed on bottle blowing equipment, and there is an exhaust pipe welded on the right side of box body, and the exhaust pipe is connected with bottle blowing gas supply pipeline, and filter screen seat is inserted on the box body.The device adopts filter screen and filter box double filtration structure, gas is first intercepted large particle impurities by filter screen, and then passes through filter box filled with filter cotton and activated carbon.Filter cotton can further filter fine particles, and activated carbon can effectively remove odour, harmful gas and other gases by virtue of strong adsorption capacity, and the combination of the two greatly improves the depth and precision of air purification;The base block at the top end of the inner wall of box body is connected with cleaning brush by spring rod, and when pulling filter screen seat, cleaning brush can automatically clean the sundries on filter screen, and spring rod can ensure that cleaning brush is always in close contact with filter screen, even if wear, it can also automatically follow up, reduce manual cleaning frequency, reduce maintenance cost and workload.

The invention discloses a preparation method of low-self-discharge aminated activated carbon for a supercapacitor, and belongs to the technical field of supercapacitors. The preparation method comprises the following steps: by taking commercial activated carbon as a raw material, sequentially adding a catalyst, the activated carbon and an amino reagent into a beaker according to a certain proportion, uniformly mixing, and then putting a uniform mixed solution into a reaction kettle for homogeneous reaction; and after the reaction is completed, washing with deionized water and absolute ethyl alcohol, and drying to obtain the aminated activated carbon. In the system, the introduction of the catalyst induces a cross-coupling reaction, so that the occurrence of side reaction is effectively avoided, and the directional introduction of amino functional groups on the surface of the activated carbon is promoted. The surface charge state is optimized through activated carbon surface amination, the adsorption capacity of activated carbon to charged ions is improved, then self-discharge caused by diffusion-controlled non-Faraday reaction is effectively restrained, when the initial voltage is 3.0 V, after standing is conducted for 40 hours, the voltage retention rate is larger than 76%, and low self-discharge of the supercapacitor is achieved.

The invention discloses a method for recovering Au (III) in an aqueous solution, and belongs to the field of hydrometallurgy and precious metal recovery. The method comprises the following steps: recovering Au (III) in a solution by using Fe1-XCoXS2, and carrying out gold adsorption under mechanical stirring; the adsorption capacities of FeS2 with different Co doping amounts on Au (III) in an aqueous solution are remarkably different, so that when the Fe1-XCoXS2 is used for recovering Au (III) in the aqueous solution, FeS2 with different Co doping amounts can be selected for adsorption according to the initial gold concentration in the solution; moreover, in a simulated solution containing a plurality of coexisting interfering ions, Fe < 1-x > CoXS2 shows excellent selectivity to Au (III); according to the method, Au (III) in the aqueous solution can be efficiently recycled, the good recycling effect on Au (III) in the acid waste liquid is achieved, and the method has the advantages of being energy-saving, environmentally friendly, low in cost and the like.

The invention is applicable to the technical field of photo-Fenton water treatment, and provides a preparation method and application of a photo-Fenton catalytic material, according to the method, ND is innovatively used as a template, and ND is used as a structural framework to support an MIL-100 (Fe) metal organic framework, so that MIL-ND is constructed, and the MIL-ND is used for degrading MB dye wastewater in photo-Fenton reaction. The MIL / ND enables exposed photo-Fenton active sites on the material to be increased, and meanwhile, a built-in electric field formed between the materials effectively hinders recombination of photo-generated carriers. The introduction of ND effectively improves the adsorption capacity of active sites of Fe and H2O2, reduces the H2O2 adsorption energy barrier, accelerates the circulation of Fe < 3 + > / Fe < 2 + >, forms a stable Fe-O-C structure to promote the generation of OH, and effectively solves the technical problems of low reaction efficiency and slow kinetics of MIL-100 (Fe) in traditional photo-Fenton.

This invention relates to the field of adsorbent technology, and discloses a PANIBi2S3 nanocomposite material, its preparation method, and its application. The composite material is polyaniline-coated bismuth sulfide; the bismuth sulfide has a nanoflower morphology. The nanocomposite material obtained by this invention has good iodine adsorption capacity.

The invention relates to the technical field of water treatment intelligent control, and discloses a biochar adsorption capacity dynamics simulation and prediction system, which comprises a data acquisition module, an Arrhenius equation is utilized to introduce a temperature correction coefficient to carry out thermodynamic compensation on an adsorption dynamics constant; the flow state recognition module judges a forward adsorption or reverse desorption working condition based on a Langmuir model; the resistance decoupling module is used for calculating a mass transfer Biot number based on a double-membrane theory so as to distinguish diffusion resistance in a liquid membrane and particles, and distinguishing physical blockage and chemical saturation by utilizing a physical blockage index; the lag compensation module introduces a lag correction factor to correct the desorption equilibrium concentration, and calculates the recovery adsorption capacity during the reverse desorption period; and the life prediction module corrects the theoretical residual capacity by using the dynamic utilization rate coefficient and generates an operation and maintenance instruction. According to the invention, through resistance decoupling and lag compensation mechanisms, physical and chemical attenuation mechanisms are effectively distinguished, and accurate prediction of the adsorption penetration time under the dynamic working condition is realized.

The present application relates to a process for producing synthetic ammonia by using hydrogen-containing tail gas, comprising the following steps: S1: sodium cyanide tail gas is pressurized, then heated and water-cooled. S2: the impurity-removed tail gas is desulfurized. S3: the desulfurized tail gas is mixed with chlor-alkali tail gas, the mixed gas is heated and deoxidized. S4: the deoxidized tail gas is pressurized and enters a PSA (pressure swing adsorption) device for pressure swing adsorption treatment, obtaining high-purity hydrogen. In the PSA device, dehydrating, carbon dioxide, methane, carbon monoxide and nitrogen adsorbents are sequentially arranged. The carbon dioxide adsorbent is activated carbon modified by carbonate and strong alkali, and the nitrogen adsorbent is 13X zeolite molecular sieve modified by Na + and Ba 2+ and Ca 2+ ion exchange. S5: nitrogen reacts with the high-purity hydrogen obtained in step S4 to generate ammonia. The present application can improve the adsorption capacity of the adsorbent for impurity gas, thereby reducing the replacement frequency of the adsorbent, prolonging the service period and service life of the adsorbent, and improving the production efficiency.

The application discloses a kind of waste gas treatment device for adhesive tape production workshop, more specifically relates to waste gas treatment technical field, including air inlet, the air inlet right side is fixedly connected with processing assembly one, the processing assembly one right side is fixedly connected with processing assembly two, and the processing assembly two rear portion is fixedly connected with purification assembly.The waste gas treatment device for adhesive tape production workshop disclosed in the application is removed by the cooperation of processing assembly one and processing assembly two, and the synergistic effect of purification assembly and desorption component, particulate matter and harmful gas in waste gas are efficiently removed, processing assembly one removes particulate matter, processing assembly two further removes impurities in waste gas, and adsorption material adsorbs harmful substances during purification process.When the adsorption material in purification component is saturated, the desorption component will restore its adsorption capacity by heating and backwashing technology, prolong the service life, reduce the replacement frequency of artificial and filter core material, and reduce maintenance cost.

The invention discloses an ion filter and a traffic device, belongs to the technical field of air purification, and aims at solving the problems that an existing negative ion filter product is poor in particulate matter adsorption capacity and the like. The ion filter disclosed by the invention comprises a frame assembly which is grounded and conducted; the negative ion generator is used for emitting negative ions, so that particulate matters in the air are negatively charged; the at least two rows of activated carbon filter elements are grounded through the frame assembly, and the activated carbon filter elements are positively charged relative to the negatively charged particulate matters so as to adsorb the negatively charged particulate matters; and all the activated carbon filter elements form a grid shape. According to the ion filter and the traffic device, the overall air filtering effect is improved; negative ions generated by the negative-ion generator can continuously supplement static electricity for the activated carbon filter element, so that static electricity attenuation caused by the use of the activated carbon filter element is avoided, and the adsorption capacity to particles is improved; anions can inhibit the activated carbon filter element from breeding bacteria and peculiar smell, and the use experience is good.

The invention discloses CO detection equipment based on an unmanned aerial vehicle, a NiCo2O4 / Ti3C2MXene composite material contained in the CO detection equipment and a preparation method of the NiCo2O4 / Ti3C2MXene composite material, and belongs to the technical field of gas sensors. According to the invention, a novel NiCo2O4 / Ti3C2MXene heterostructure is developed through a hydrothermal synthesis method, the novel NiCo2O4 / Ti3C2MXene heterostructure is used for high-sensitivity carbon monoxide (CO) detection, the response to 100 ppm of CO at 110 DEG C reaches 139.5%, and the response time is 39 seconds. The performance improvement is derived from the synergistic effect between NiCo2O4 and MXene, the density functional theory (DFT) calculation reveals the reduction of CO adsorption energy, and the in-situ Raman spectrum directly observes the reversible CO chemical adsorption / desorption process at the heterogeneous interface. Then, the sensor is integrated on a miniature unmanned aerial vehicle platform, and drawing of a real-time three-dimensional gas distribution diagram is completed within 3 minutes.

The application discloses a screening method of a phosphogypsum flotation collector, and comprises the following steps: providing a molecular structure of the collector, and obtaining the composition of impurities in the phosphogypsum; constructing a molecular model of the collector and a unit cell model of the impurities respectively, and performing geometric optimization to obtain an optimized collector molecular model and an optimized impurity unit cell model; constructing a unit cell box of the impurities; constructing an adsorption model between the collector and the impurities based on the optimized collector molecular model and the unit cell box of the impurities; performing molecular dynamics simulation calculation on the adsorption model to obtain the adsorption energy between the collector and the impurities; and sorting the adsorption energy according to the size to screen out the collector with better collection effect. The application reveals the adsorption mechanism of the collector and the phosphogypsum impurities from the molecular and atomic scales, can more quickly select the optimal collector compounding scheme based on different regional phosphogypsum impurity phases, and provides theoretical support for phosphogypsum impurity removal.

The invention provides a method for predicting the load performance of a corrosion inhibitor on a covalent organic framework material. The method is applied to the field of material simulation and design. The method comprises the following steps: determining the length of a target monomer connecting chain in various covalent organic framework material structures in a chain length increasing manner, and constructing covalent organic framework material unit cell models of various corresponding different topological structures based on the length of the target monomer connecting chain; performing structure optimization on the covalent organic framework material unit cell model and the molecular models of the various corrosion inhibitors to obtain an optimized covalent organic framework material unit cell model and an optimized molecular model; determining adsorption energy, electronic structure change and electronic interaction of molecular models of different optimized corrosion inhibitors on each optimized covalent organic framework material unit cell model; based on adsorption energy, electron structure change and electron interaction, the load performance of different corrosion inhibitors on the covalent organic framework material is predicted.

The application provides a screening method and device for a reforming product oil selective hydrogenation alloy catalyst, and the method comprises the following steps: obtaining reactant information, small molecule substance information which can reflect the structural characteristics of the reactant, all alloy catalyst systems to be screened, and the relationship between transition metals and hydrogen atom adsorption capacity; generating an alloy catalyst surface model for each alloy catalyst system, predicting the surface hydrogen atom coverage, combining the small molecule substance information to construct a kinetic model, and obtaining intrinsic reaction kinetic information of each alloy catalyst surface model; taking the predicted surface hydrogen atom coverage and hydrogen atom adsorption energy as input data, and taking catalytic performance as output data to construct a prediction model; obtaining the catalytic performance prediction value of each alloy catalyst surface model according to the prediction model; and screening the alloy catalyst according to the catalytic performance prediction value to obtain the reforming product oil selective hydrogenation alloy catalyst. The method can realize rapid screening of the catalyst.

A kind of multilayer adsorption tower oxygen generator, including adsorption tower tank body and connecting pipeline, multiple molecular sieve trays are arranged in vertical direction in adsorption tower tank body, molecular sieve tray is equipped with multiple vertical direction extension micro air flow channel, the micro air flow channel of adjacent molecular sieve tray is aligned, and molecular sieve particle is arranged in the upper end and lower end of micro air flow channel.Multiple molecular sieve trays can form multilayer structure, and the multilayer adsorption tower oxygen generator can be adjusted after a certain period of use, for example, the lowermost molecular sieve tray is moved to the upper side, or the uppermost molecular sieve tray is moved to the lowermost end, effectively avoiding the problem of reducing nitrogen adsorption efficiency when the lower molecular sieve fails.This structure design makes a large amount of nitrogen be adsorbed before entering the adsorption tower, reduces the gas flow resistance, significantly improves the nitrogen adsorption capacity, thereby solving the technical problems that the molecular sieve will fail in the prior art, and the oxygen concentration decreases with the change of use time.

The utility model relates to the field of microbubble technology deodorization devices, and provides a microbubble technology deodorization device which comprises a tank body, an odor inlet pipe is fixedly arranged on the outer surface of the tank body, an activated carbon adsorption deodorization plate is used for primarily adsorbing, filtering and deodorizing odor, and a micro-nano bubble generator is used for mixing water and air input by a water conveying pipe and an air conveying pipe. An aqueous solution containing a large number of micro-nano bubbles is generated, the aqueous solution is transported through the transport ring and sprayed downwards through the atomization nozzle to make contact with the odor, and the odor is deodorized by means of the characteristics that the micro-nano bubbles are large in specific surface area, can make full contact with gas and have extremely high adsorption capacity on tiny particles. The output shaft of the motor drives the rotating shaft and the plurality of chemical adsorption deodorization plates to rotate and chemically react with harmful components in odor for deodorization, and the output shaft of the motor simultaneously drives the two transmission wheels to rotate through the transmission belt, drives the driving screw rod to rotate and drives the movable scraping plate to move on the inner wall of the tank body so as to scrape away impurities and dirt deposited on the inner wall of the tank body.

The utility model relates to the technical field of gas sensor, specifically disclose a kind of ammonia gas sensor of graphene transistor, including substrate, preferably glass substrate, the top of substrate is provided with first electrode and second electrode, the thickness of first electrode, second electrode is 15nm or 100nm, and material is Ti or Au;First electrode and second electrode between being provided with channel, channel is graphene channel or graphene oxide channel, the top of channel is provided with graphene oxide fragment, and the graphene oxide fragment is discrete graphene oxide fragment of drop coating. The sensor makes full use of the adsorption capacity of graphene oxide, the conductive characteristics of graphene and the isomorphism of both, to greatly enhance gas sensitive characteristics.