63 results about "Adsorption energy" patented technology

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 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.

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 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.

The application discloses an Al-doped two-dimensional MnO2 adsorption structure for SO2 immobilized adsorption and application thereof. The Al-doped two-dimensional MnO2 adsorption structure for SO2 immobilized adsorption comprises a two-dimensional MnO2 monolayer as a substrate, and Al modified atoms on H sites on the surface of the substrate, wherein the doping concentration of the Al modified atoms is 2% to 4%. A stable Al-O interaction interface is formed between the Al modified atoms and O atoms in SO2 molecules, so that a strong chemical adsorption interface dominated by ionic bond interaction is formed between SO2 and the adsorption structure; in a preferred configuration, the adsorption energy of the adsorption structure for SO2 is -2.154 eV, the interface charge transfer amount is -0.49 e, and the Al-O interaction distance is 1.737 Å. The adsorption structure can be used for irreversible capture, enrichment and immobilized adsorption of SO2, and industrial waste gas desulfurization and capture of toxic gas containing sulfur.

The embodiment of the application discloses a kind of adsorption energy prediction method and related device, at least involve machine learning in artificial intelligence etc., can be applied to catalysis field, environmental catalysis, energy conversion, chemical production, biomedical scene etc..The method provided in the application embodiment can save computing time, improve prediction accuracy, speed up the development process of new materials.Moreover, the adsorption energy prediction method comprises: obtaining the target structure and element characteristics of the material to be predicted;According to the target structure of the material to be predicted, target distance information and target angle information are obtained;The target structure characteristics of the material to be predicted are determined based on the target distance information and the target angle information;The target structure characteristics and element characteristics are processed based on the preset machine learning model, and a prediction label is obtained, which is used to indicate the adsorption energy of the adsorption molecule in the material to be predicted.

The present application relates to the technical field of low-carbon metallurgical CO2 reduction catalyst, and specifically discloses a single-atom Mo loaded titanium dioxide hollow sphere, a preparation method and application thereof. The present application inhibits CO from occupying the active center from the adsorption energy level through the electronic regulation of Mo sites, and at the same time, hinders CO from approaching the active center from the mass transfer level by using the hollow confinement structure of TiO2. The synergistic effect of the two significantly improves the stability and selectivity of the catalyst in a low-concentration CO2 atmosphere. Experiments show that in a simulated industrial low-concentration CO2 atmosphere (CO2 volume fraction 15%), the activity of the catalyst does not show obvious attenuation after 16 hours of continuous reaction, and the Mo sites do not show obvious CO poisoning and deactivation after the reaction, proving that the catalyst of the present application has broad application prospects and industrialization promotion value in the fields of CO2 resource utilization of industrial CO-containing exhaust gas and syngas purification.

The application discloses a kind of single crystal covalent organic framework materials, the structural formula of single crystal covalent organic framework material is:;Single crystal covalent organic framework material of the application has the advantages such as high adsorption capacity, stable selectivity, low regeneration energy consumption and excellent cycle performance, provides a new adsorption separation material system for propylene low-energy consumption purification;The adsorption capacity of C3H4 and C3H8 is significantly higher than C3H6 under normal temperature and pressure, so as to realize the one-step separation and purification of propylene in C3H4 / C3H6 / C3H8 ternary mixed gas, and polymerization grade propylene can be directly obtained.

The application relates to the technical field of intelligent water treatment control, and discloses a system for simulating and predicting the kinetics of the adsorption capacity of biochar, which comprises the following modules: a data acquisition module uses the Arrhenius equation to introduce a temperature correction coefficient to perform thermodynamic compensation on adsorption kinetic constants; a flow state recognition module determines a forward adsorption or reverse desorption working condition based on the Langmuir model; a resistance decoupling module calculates the mass transfer Biot number based on the double membrane theory to distinguish the liquid film and the internal diffusion resistance of the particles, and uses a physical blockage index to distinguish physical blockage and chemical saturation; a hysteresis compensation module introduces a hysteresis correction factor to correct the desorption equilibrium concentration and calculate the recovery adsorption capacity during the reverse desorption; and a service life prediction module uses a dynamic utilization rate coefficient to correct the theoretical residual capacity and generate operation and maintenance instructions. Through the resistance decoupling and hysteresis compensation mechanisms, the physical and chemical attenuation mechanisms are effectively distinguished, and the precise prediction of the adsorption breakthrough time under dynamic working conditions is realized.

The present application relates to the technical field of flue gas desulfurization catalyst, and disclose a kind of active carbon catalyst for flue gas desulfurization and preparation method, the present application is added to container water, copper salt, after stirring, amino naphthalene formic acid graft cellulose is added, ion crosslinking is carried out, crosslinking product is placed in tube furnace, calcination, activation is carried out, and the active carbon catalyst for flue gas desulfurization is obtained. With cellulose matrix and high carbon naphthalene ring as carbon source, form high specific surface area, high stability carbon skeleton porous active carbon, large specific surface area, abundant porosity, contain a large number of copper oxide catalytic active component, can effectively reduce the content and concentration of sulfur dioxide in flue gas, after high temperature calcination in active carbon matrix form active nitrogen structure, can improve the adsorption capacity of active carbon to SO2.

The application discloses a sintering flue gas treatment device and a treatment method thereof and belongs to the technical field of flue gas treatment. The device comprises a tower body, a waste liquid tank is arranged at the bottom of the tower body, and a plurality of pretreatment adsorption units are arranged around the position corresponding to the waste liquid tank at the bottom of the inner cavity of the tower body. In the application, the water sprayed by the spraying assembly can enter the corresponding pretreatment adsorption unit under the guidance and control of the connecting assembly, the sintering flue gas sent from the bottom can be guided into the corresponding pretreatment adsorption unit through the air inlet guide assembly, the rising sintering flue gas can be contacted with the sprayed water for spraying purification, the activated carbon on the sidewall of the pretreatment adsorption unit can simultaneously perform the pre-adsorption of the flue gas, the air after spraying and adsorption can pass through the gathering of the smoke hood upwards, be conveyed to the tower top through the pipeline and be treated by the subsequent purification process, the pre-spraying and adsorption of the sintering air can reduce the content of large particles in the flue gas, and the difficulty of the subsequent process purification treatment is reduced.

This invention discloses a self-supporting, high-efficiency OER Mo / Ru-Ni / NF electrocatalyst and its preparation method, belonging to the field of electrocatalytic materials technology. Addressing the problems of insufficient exposure of active sites, poor conductivity, and high interfacial resistance due to the need for binders in existing catalysts, this invention uses nickel foam as a substrate and employs a two-step electrodeposition method combined with a calcination process to prepare a composite catalyst with a cauliflower-like porous structure. This material optimizes the electronic structure and oxygen intermediate adsorption energy by introducing strongly electron-deficient Mo centers to modify the Ru-Ni heterojunction interface; the unique self-supporting porous structure increases the active area, promoting mass transfer and electron transport. This catalyst requires no binder, exhibits low overpotential, a small Tafel slope, and excellent long-term stability, significantly improving the catalytic performance of the oxygen evolution reaction (OER) and making it suitable for high-efficiency water electrolysis for hydrogen production.

This invention discloses a method for preparing magnetic iron-cobalt-nickel layered trimetallic hydroxide modified feldspar adsorbent material and its application in water treatment, belonging to the field of environmental engineering technology. This invention uses a hydrothermal synthesis method to obtain magnetic iron-cobalt-nickel layered trimetallic hydroxide modified feldspar adsorbent material [Ni 0.33 Co 0.33 Fe 0.33 [(OH)2](CO3) 0.17 ·mH2O / CaAl2Si2O8 (m=0.5~4.0), specific surface area is 45-60 m² 2 / g, the total pore volume is 0.136–0.141 cm³. 2 / g. Modification can improve the pore structure of feldspar, significantly increasing its specific surface area and thus enhancing its adsorption capacity for recalcitrant organic pollutants. The resulting magnetic iron-cobalt-nickel layered trimetallic hydroxide modified feldspar adsorbent material is saturated with organic pollutants. This adsorbent material is simple to prepare, exhibits high adsorption efficiency, stability, is environmentally friendly, and is safe and non-toxic to humans. It can be used to adsorb organic pollutants in water and has promising application prospects.

The application provides an oxygen-coordinated cobalt monatomic catalyst, a preparation method and application thereof. The oxygen-coordinated cobalt monatomic catalyst is composed of a porous carbon skeleton, cobalt monatomic and oxygen atoms. The specific surface area of the porous carbon skeleton is 100-3000 m 2 / g, the mass content of the cobalt monatomic is 0.01%-10%, and the mass content of the oxygen atoms is 1%-15%. The catalyst anchors the cobalt metal center by using an oxygen-rich metal organic framework, and forms Co-O-C after carbonization. In the oxygen-coordinated cobalt monatomic catalyst, the oxygen-coordinated structure can adjust the electronic structure of the central metal cobalt to promote the transfer of active sites, provide the optimal adsorption energy of the intermediate OOH, and thus improve the selectivity of 2e ‑ ORR.

This invention relates to the field of water purification equipment technology, and provides a water purification device and its filter element electric field control method and control device. The filter element electric field control method of the water purification device includes the following steps: based on the capacitive deionization filter element being in the adsorption purification stage, a control electric field control module applies a first pulse voltage to the electrodes of the capacitive deionization filter element. The filter element electric field control method of the water purification device provided by this invention can utilize the periodic variation of the pulse voltage to enable charged particles to more effectively overcome the diffusion boundary layer resistance under the alternating synergy of electric field action and diffusion action, gradually migrating into the deep pores inside the electrode and being stably adsorbed. This significantly improves the diffusion rate of ions from the water body to the pores inside the electrode, thereby increasing adsorption efficiency and total treatment capacity, and solving the problems of low adsorption efficiency and rapid decline in water flow and efficiency over time caused by the use of a constant DC electric field in the prior art.

The application provides a lattice matching type MOF / LDH self-supporting electrocatalyst and a preparation method and application thereof, and belongs to the technical field of electrocatalysis. The application comprises treatment of an activated substrate, preparation of an iron-based MOF self-supporting material and preparation of a lattice matching type MOF / LDH self-supporting material. The application takes an iron-based MOF as an inner template, realizes lattice matching growth of the MOF and the LDH by regulating and controlling the solvent thermal reaction conditions of the urea dosage and the nickel / iron metal ratio, and constructs a self-supporting composite electrocatalyst with strong interface coupling. The catalyst optimizes active site adsorption energy through the interface electron rearrangement effect induced by lattice matching, has a low overpotential of 240 mV at a current density of 10 mA cm ‑2 in a 1.0 M KOH solution, has high oxygen evolution activity and excellent long-term stability, and the performance is significantly better than that of a single-component MOF, LDHs and a noble metal RuO2 comparative catalyst.

This invention discloses activated carbon for methane adsorption and its preparation method, belonging to the field of activated carbon technology. The preparation method includes the following steps: mixing walnut shell powder with phosphoric acid and stirring to obtain a matured material; drying and shaping the matured material sequentially to obtain a carbonized material; performing preliminary activation on the carbonized material using a two-stage heating process, followed by water washing for dephosphorization and drying to obtain a crude product; subjecting the crude product to secondary activation, acid washing, and water washing sequentially to obtain a preliminary product; and modifying the preliminary product with alkali and hydrophobicity to obtain the finished product. The obtained finished product has an average pore size of 2.1 nm and a specific surface area of ​​2000 m². 2 It has a large number of micropores and a capacity of / g or more, which can effectively adsorb methane and is not easily clogged during use.

The application discloses a hydrophobic modified zeolite, a preparation method and application, and by means of in-situ structure regulation, a bifunctional modifier is introduced to change the surface energy of the zeolite pore and realize the remodeling of the zeolite structure, the zeolite grain size is reduced, the surface tension of the grain is increased, and the hydrophobic performance of the zeolite is greatly improved. The hydrophobic modification method breaks the barrier and difficulty that the existing modification method causes the adsorption performance of the modified zeolite to be reduced and the relationship between the hydrophobic and adsorption performances cannot be balanced, and realizes the technical advantage that the zeolite still maintains excellent CO2 adsorption capacity after being hydrophobically modified. The hydrophobic modified zeolite prepared by the application has the characteristics of high CO2 adsorption performance and strong hydrophobicity, and can save the flue gas drying and dehydration link in the actual operation of the zeolite, and save the process flow. The method has the characteristics of simple preparation mode, mild synthesis condition and no pollution, and has the potential for industrial production.

This utility model relates to the field of carburizing and quenching technology, and discloses a multi-purpose air-cooled circulation device for the front chamber of a carburizing and quenching furnace; it includes a quenching furnace front chamber, and further includes: a first connecting pipe connected to the right side of the quenching furnace front chamber, the other end of the first connecting pipe being connected to a filter box; and a filter structure disposed inside the filter box; after the workpiece is quenched, the air in the quenching furnace front chamber is adsorbed by a fan, which allows the hot air to adsorb oil, odors and harmful gases in the hot air when passing through the filter structure. At the same time, when the hot air is transported again, the heat of the hot air can be transferred through the cooling structure inside the cooling box, so that the temperature of the hot air is reduced, and then transported back to the quenching furnace front chamber through the second connecting pipe, which can quickly reduce the temperature of the quenching furnace front chamber, accelerate the cooling rate of the workpiece, and prevent the workpiece from being oxidized and discolored due to prolonged high temperature.

This application relates to the field of electrocatalyst technology, disclosing a low-Ru basic HER electrocatalyst, its preparation method, and its application. The low-Ru basic HER electrocatalyst comprises an M-N-C substrate formed by metal M anchored at a single site on nitrogen-doped carbon, and Ru uniformly distributed on the M-N-C substrate; wherein the metal M includes at least one of Ga, In, Sn, or Sb. In this application's low-Ru basic HER electrocatalyst, metal M is anchored at a single site on nitrogen-doped carbon (N-C) to form M-N-C, while Ru is uniformly distributed in clusters of approximately 2 nm on the M-N-C support. Strong catalyst-support interactions occur between the Ru clusters and M-N-C due to Ru-M interactions; simultaneously, the Ru-H adsorption energy is optimized, and the oxygen-loving M further enhances water dissociation capacity, thereby improving the basic HER performance. The electrocatalyst of this application has a low Ru content, with a Ru loading of only 0.08 mg cm⁻¹ at the cathode of an anion exchange membrane electrolyzer. ‑2 Around [a certain amount], while ensuring catalytic activity, the cost was significantly reduced.

The present disclosure provides a carbon-based porous material suitable for electrochemical carbon dioxide capture, a preparation method and application thereof, and belongs to the technical field of electrochemistry. The preparation method comprises: placing urea powder in a high-temperature tube furnace, and introducing nitrogen for 0.5-1.5 hours; pyrolyzing the urea powder under an argon atmosphere and at a preset temperature for 0.5-1.5 hours, and then obtaining a nitrogen-doped carbon-based porous material after cooling and grinding. The present disclosure adopts an in-situ synthesis method, uses urea as a nitrogen source and a carbon source precursor at the same time during the preparation process, and is treated at high temperature in an inert environment, thereby realizing one-step synthesis of a nitrogen-doped carbon material. The material has a large specific surface area and strong adsorption capacity, can effectively adsorb carbon dioxide gas molecules to the surface, and effectively improves the performance and use range of the carbon material in catalysis, adsorption, electrochemistry and the like.

The present application belongs to the technical field of electrocatalytic materials, and particularly relates to a method for screening high-selectivity iron-nitrogen-carbon electrocatalysts for NO3RR based on a curved structure. The method aims to solve the technical problem of low selectivity of ammonia, the target product, in the nitrate reduction process of existing iron-nitrogen-carbon electrocatalysts due to competing side reactions. The method comprises the following steps: firstly, constructing a planar iron-nitrogen-carbon structure model and a series of tubular iron-nitrogen-carbon structure models with different curvatures; secondly, calculating the adsorption energies of nitrogen atoms and oxygen atoms for the planar and tubular structure models, respectively, and selecting a target tubular iron-nitrogen-carbon structure model based on the adsorption energy data; thirdly, calculating the reaction Gibbs free energies of the planar model and the target tubular model for reducing nitrate to various nitrogen-containing products; and finally, drawing a reaction path free energy diagram at zero potential based on the reaction Gibbs free energies, and analyzing the specific influence of the curved structure on the selectivity of the iron-nitrogen-carbon electrocatalytic nitrate reduction reaction, thereby guiding subsequent experimental research.

The application relates to the technical field of adsorbing materials, and discloses a preparation method of a carbon dioxide capturing agent and application of the carbon dioxide capturing agent. The carbon dioxide capturing agent is prepared from nitrogen-containing porous carbon, quaternary ammonium kaolin and the like as raw materials through mixing, compression molding and sintering processes. The nitrogen-containing porous carbon has a high specific surface area and can exhibit higher adsorption capacity. Meanwhile, nitrogen element doping can introduce alkaline defect structures. These alkaline nitrogen sites have strong chemical affinity to acidic CO2 molecules, can improve the CO2 adsorption capacity of the porous carbon, and can also endow the activated carbon with the effect of selectively adsorbing CO2. The quaternary ammonium kaolin is prepared by modifying a large number of quaternary ammonium cations on the surface of kaolin. The quaternary ammonium kaolin can not only absorb carbon dioxide by using the structure itself, but also can improve the affinity of the capturing agent to carbon dioxide and enhance the adsorption effect by carrying positive electricity of the large number of quaternary ammonium cations on the surface.

The present application relates to the field of environmental protection and wastewater treatment technology, and more particularly to a copper-loaded adsorbent, a preparation method and application thereof. The method comprises: pretreating zeolite; activating the pretreated zeolite; loading copper ions on the activated zeolite by using a solution containing copper ions to obtain a copper-loaded adsorbent precursor; and cleaning and drying the copper-loaded adsorbent precursor to obtain the copper-loaded adsorbent. The copper-loaded adsorbent not only has a high adsorption capacity and can significantly reduce the ammonia nitrogen concentration in wastewater in a short time, but also has good regeneration performance, which means that it can still maintain high adsorption capacity after multiple uses, thereby prolonging the service life and reducing the replacement frequency.

This invention relates to the field of low-carbon metallurgical CO2 reduction catalyst technology, specifically disclosing a single-atom Mo-supported hollow titanium dioxide sphere, its preparation method, and its applications. This invention inhibits CO from occupying the active center at the adsorption energy level through electronic regulation of the Mo sites, while simultaneously utilizing the hollow confinement structure of TiO2 to hinder CO from approaching the active center at the mass transfer level. The synergistic effect of these two methods significantly improves the stability and selectivity of the catalyst in a low-concentration CO2 atmosphere. Experiments show that in a simulated industrial low-concentration CO2 atmosphere (CO2 volume fraction 15%), the catalyst's activity did not significantly decrease after 16 hours of continuous reaction, and no obvious CO poisoning deactivation was observed at the Mo sites after the reaction. This demonstrates that the catalyst of this invention has broad application prospects and industrial promotion value in the fields of CO2 resource utilization from CO-containing industrial tail gas and syngas purification.

The invention provides a particle discharging device and method for a Tokamak divertor area. The device comprises an adsorbent pump unit arranged in a divertor area and a gas channel structure communicated with the divertor area, and is used for capturing and discharging neutral particles generated by interaction of plasma and divertor components. The adsorbent pump unit is made of a non-evaporation type adsorbent material, has high adsorption capacity on hydrogen and isotopes thereof, can keep stable structure and working performance under the condition of high temperature, and is suitable for a high-heat-load and high-particle-flux operating environment in a divertor area. The in-situ air exhaust of the neutral particles is realized in the divertor area, so that the transport path of the particles is shortened, and the response speed and efficiency of particle discharge are improved. Meanwhile, the particle discharging device has large air extraction capacity and effective extraction speed, is suitable for tritium-related application scenes and operating environments with neutron irradiation, and has good engineering application prospects.

This invention utilizes waste coffee grounds to successfully prepare a high-performance carbon capture material through a combination of cold pressing and high-temperature co-sintering processes. Its core lies in a "triple synergistic enhancement" mechanism: biomass burn-off forms a hierarchical macroporous network, reducing mass transfer resistance; potassium in the ash is used for in-situ doping, promoting ion diffusion; and carbothermic reduction generates oxygen vacancies, enhancing CO2 adsorption capacity. This material exhibits high adsorption capacity, excellent cycling stability, and good mechanical strength at high temperatures, providing a green technological path for low-cost, industrial-scale production of carbon capture materials.