62 results about "Adsorbed molecule" patented technology

The invention discloses a desulfurization adsorbent for low-carbon olefins and a preparation method of the desulfurization adsorbent, and belongs to the technical field of preparation of desulfurizers. The desulfurization adsorbent is a 13X molecular sieve with larger K < + > ion exchange aperture, so that the acting force between adsorbed molecules and cations is weak, the adsorption heat is obviously reduced, the olefin adsorption capacity is weakened, the polymerization reaction of olefin is obviously inhibited, the content of effective components can be further improved, and the adsorption capacity is improved; in the forming process of the adsorbent, a macromolecular polymer and a mesoporous high-thermal-conductivity material are added, local heat accumulation in the adsorption process is reduced, local temperature rise is relieved, meanwhile, heat is rapidly taken away, the adsorption temperature rise is small, and unexpected shutdown, olefin leakage and other dangers are avoided; in the forming process of the adsorbent, metal components are added, the adsorption sites of the adsorbent are further increased, the adsorption speed is higher, and the desulfurization efficiency is higher.

The invention provides a system and a method for treating coexisting new pollutants in drinking water, and the system and the method are characterized in that firstly, ozone microbubble water with small volume and large specific surface area and magnetized superfine activated carbon are used for carrying out oxidation treatment on the coexisting new pollutants and adsorbing pollutants with small molecular weight and relatively high activity; the purpose of removing part of new pollutants is achieved; then, under the irradiation of an ultraviolet lamp tube, the reducing agent catalyzes sulfite to generate reducing free radicals such as hydration electrons [eaq-],. H and SO3., and under the substitution action of iodide ions, reductive dehalogenation and iodine substitution reaction of the halogenated organic matter difficult to degrade are achieved, and reduction removal of new pollutants difficult to degrade is achieved. The system is simple and compact in structure, is a treatment device integrating filtration, oxidation, adsorption and reduction, reduces the occupied area, can realize effective removal of coexisting new pollutants with different molecular characteristics and different reaction activities through multiple actions of physical interception, oxidation, adsorption, reduction and the like, and has a wide application prospect.

The invention belongs to the technical field of crystalline materials, particularly relates to a calcium-based metal organic framework material, a preparation method thereof and application of the calcium-based metal organic framework material in carbon dioxide trapping, and provides a calcium-based metal organic framework material formed by using 2, 5-pyrazine dicarboxylic acid as a ligand and calcium salt through a solvothermal method. The calcium-based metal organic framework material can generate transformation of unit cell parameters when removing guest molecules and adsorbing CO2 molecules, the metal-organic framework material is constructed by taking acetonitrile as a template agent, and due to the similarity of acetonitrile and CO2 molecules, the MOF has potential application in the aspect of CO2 trapping.

A carbon dioxide recovery system includes an electrochemical cell that includes a working electrode, a counter electrode, an insulating layer, and an electrolyte layer. The electrochemical cell is configured to repeat an adsorption mode and a desorption mode. In the adsorption mode, in a state where oxygen is supplied together with a gas to be treated that contains carbon dioxide to a portion of the electrolyte layer in a vicinity of the working electrode, a voltage is applied between the working electrode and the counter electrode to supply electrons to the working electrode so that the oxygen receives electrons to generate active oxygen, and the active oxygen combines with the carbon dioxide to absorb the carbon dioxide and generate a carbon dioxide adsorbed molecule.

The invention relates to the technical field of molecular sieve and dust separation, in particular to a pressure swing adsorption molecular sieve screening device which is characterized in that the upper end of a screening pipe is connected with the upper end of a dust conveying pipe, and the lower end of the dust conveying pipe is connected with the lower end of a primary dust collecting pipe; a plurality of air supply branch pipes are arranged in the lower portion of the screening pipe, a feeding port is formed in one side of the upper portion of the screening pipe and connected with a feeding hopper, the feeding hopper is connected with a feeding pipe, and a transverse dispersing device and a longitudinal dispersing device are arranged on the inclined face in the feeding hopper. And a screen is arranged in the screening pipe, and the screen is arranged between the feeding port and the air supply branch pipe. The air supply branch pipe on the lower portion of the screening pipe provides airflow into the screening pipe and is used for separating dust and a molecular sieve; the device is used for regularly screening and removing pulverized molecular sieve particles, so that the requirement of frequent replacement caused by aging and crushing of the molecular sieve is reduced, the production cost is reduced, and the oxygen production efficiency and the product quality are improved.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and relates to a preparation method of an Ag-Fe3O4 composite SERS substrate and application of the Ag-Fe3O4 composite SERS substrate in monitoring trace pollutants in water. Based on a plasma-semiconductor synergistic enhancement mechanism, cubic Fe3O4 nano particles with exposed {100} crystal faces are synthesized through a hydrothermal method, and the cubic Fe3O4 nano particles and Ag nano particles are subjected to ultrasonic-stirring to construct the Schottky heterojunction. The substrate creatively realizes dual-channel enhancement: the local surface plasmon resonance effect of Ag nanoparticles generates electromagnetic enhancement, the narrow band gap of Fe3O4 promotes photo-induced electrons to be transferred to Ag, an interface electric field is formed, and the polarizability of adsorption molecules is remarkably increased. When the probe is applied to detection of trace pollutants in a water body, the probe molecule RB is anchored on the surface of Fe3O4 through carboxyl, and the HOMO energy level of the probe molecule RB and the valence band top of Fe3O4 generate resonance charge transfer, so that the Raman cross section is improved. The detection limit of RB under 0.25 mW laser is increased by several orders of magnitude compared with that of a single Ag substrate.

The present invention aims to provide an activated carbon for adsorbing a molecular polar substance with excellent adsorption property to a molecular polar substance and regeneratability. The present invention provides an activated carbon for adsorbing a molecular polar substance obtained by an alkali activation method, wherein the activated carbon has an acidic functional group in an amount of 2.1 meq / g or more, a basic functional group in an amount of more than 0 to 0.6 meq / g, and a specific surface area of 1000 to 4000 m2 / g.

The application relates to a functionalized glass for SERS detection and a preparation method thereof, characterized by the following steps: a. tetraethyl orthosilicate and oxalic acid are mixed into a 0.02-0.10 moL / L sol in anhydrous ethanol according to a molar ratio of 1:2-5, a stabilizer with a volume of 5-50% is added, and then the mixture is stirred and transferred into a four-necked flask; b. after being heated and stirred for 12-16 hours, an anhydrous ethanol emulsion of polystyrene small balls with a mass fraction of 5-20% and a volume of 6-18% is added; c. an anhydrous ethanol solution of a surfactant P123 with a total mass of 2-8% and a weight concentration of 3-8% is added, and then the mixture is stirred and aged; d. a wet film is prepared on a glass substrate, and then the wet film is dried and kept warm; (2) a nano-silver particle dispersion liquid with a concentration of 5-25 mg / mL is prepared; and (3) the glass substrate prepared in the step d is coated with the nano-silver particle dispersion liquid and dried. The application has the advantages of simple process and low cost; the surface of the porous structure silica nano-particles has a large number of nanoscale gap structures, which is beneficial to obtaining an enhanced silver nano-particle surface plasmon resonance electromagnetic field, and greatly enhances the Raman signal of the adsorbed molecules.

The invention belongs to the technical field of immunohistochemical detection, and discloses a modified composite sealing buffer solution as well as a preparation method and detection application thereof. The modified composite blocking buffer solution comprises a basic buffer system, a composite blocking agent, a nonionic detergent, an endogenous interferent blocking agent and an antibody stabilizer, wherein the basic buffer system provides a stable pH environment and ionic strength; the composite sealing agent firstly occupies a shielding site, and the background is lowered; the nonionic detergent destroys hydrophobic interaction, effectively elute and loosen adsorbed molecules, and promote dissolution of components with relatively strong hydrophobicity; the endogenous interferent blocker can be combined with a receptor firstly, so that non-specific combination of an antibody and the receptor is blocked, and the problem of specific background is solved; the antibody stabilizer can protect the activity of the detection reagent and maintain the stability, and the obtained modified composite sealing buffer solution and the kit thereof have the advantages of multiple cooperative sealing mechanisms, prospective blocking of endogenous interference, improvement of the stability, compatibility and high efficiency of the antibody and the like.

This invention relates to the field of spectroscopic testing technology, specifically to a membrane electrode, reaction cell, spectroscopic testing device, and their applications in an in-situ spectroscopic reaction cell under operating conditions. The membrane electrode comprises a light-transmitting ion-exchange membrane and two catalyst layers in contact with opposite sides of the ion-exchange membrane. At least one catalyst layer forms the catalyst-membrane reaction observation interface at its contact surface with the ion-exchange membrane. The other catalyst layer, opposite the catalyst-membrane reaction observation interface, has a light-transmitting aperture. This design exposes the catalyst-membrane reaction observation interface, allowing scattered light reflected from the interface to be collected by a spectrometer through the aperture. This enables in-situ observation of important conformational and microenvironmental information of adsorbed molecules at the catalyst-membrane reaction observation interface, thus providing an understanding of the reaction mechanism.

The invention provides a construction method and application of an SO2 gas sensor based on a room-temperature H2S removal agent, and belongs to the field of gas sensors, the device comprises an SO2 gas sensor and an H2S filter membrane, the H2S filter membrane is arranged at a gas inlet of the SO2 gas sensor, and the SO2 gas sensor can detect SO2 with different concentrations; the H2S filtering membrane adsorbs H2S molecules to reduce the interference of the H2S molecules on SO2 gas-sensitive detection, so that the detection selectivity and accuracy are improved. The invention aims to realize high-sensitivity and high-precision detection of SO2 in a H2S-containing mixed gas environment, and has the advantages of simplicity and convenience in operation, low cost, environmental friendliness, wide applicability and the like.

The present invention relates to a preparation method and a use method of a molecular sieve for adsorbing formaldehyde. The preparation method includes the following steps: (1) preparing a carrier of the molecular sieve; (2) preparing a load of the molecular sieve; (3) preparing the molecular sieve. The use method includes the following steps: putting the prepared molecular sieve into the wastewater containing formaldehyde according to the amount of the wastewater containing formaldehyde in proportion, then adding dilute hydrochloric acid to the wastewater to adjust the pH, and then adjusting the reaction temperature, and reacting for 6d - 7d to achieve the purpose of adsorbing formaldehyde in the wastewater. As a crystalline material with a porous structure, the pore size of the molecular sieve can be accurately controlled at the molecular level, so it can selectively adsorb formaldehyde (HCHO) molecules with a smaller molecular weight. While the molecular sieve efficiently adsorbs formaldehyde, it retains the carbon source to the greatest extent and has high industrial application value.

This invention belongs to the field of microbial electrochemistry and single-cell analysis technology, and specifically relates to a femtocoulomb-level single-bacterial surface charge imaging method and its application. This technology is based on electrochemiluminescence microscopy, utilizing the spontaneous enrichment of cationic ECL luminescent molecules by the electrostatic field of the negative charge on the bacterial surface, thereby non-destructively enhancing its ECL signal. By establishing a quantitative relationship between the ECL intensity enhancement ratio and the number of adsorbed molecules, and combining this with COMSOL simulation to determine the thickness of the luminescent layer, it achieves for the first time high-throughput, high spatiotemporal resolution dynamic quantitative measurement of femtocoulomb-level charges on the surface of a single living bacterium. The invented technology has high sensitivity, high resolution, and good biocompatibility, and can be used to reveal bacterial metabolic-charge regulation mechanisms, analyze synergistic electron transport pathways, and screen highly electroactive bacterial subpopulations in situ, providing a key tool for microbial electrochemical research.

Nearly all existing direct current (DC) chemical vapor sensing methodologies are based on charge transfer between sensor and adsorbed molecules. However, the high binding energy at the charge-trapped sites, which is critical for high sensitivity, significantly slows sensors' response and makes the detection of non-polar molecules difficult. By exploiting the incomplete screening effect of graphene, this disclosure demonstrates a DC graphene electronic sensor for rapid (sub-second) and sensitive (ppb) detection of a broad range of vapor analytes, including polar, non-polar, organic and inorganic molecules. Molecular adsorption induced capacitance change in the graphene transistor is revealed to be the main sensing mechanism. This work provides an avenue for a broad spectrum real-time gas sensing technology and serves as an ideal testbed for probing molecular physisorption on graphene.

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 invention relates to a method for adsorbing sulfydryl or thiophenol molecules on the surface of a platinum catalyst to enhance electro-catalysis formic acid oxidation and methanol oxidation, in particular to a method for enhancing formic acid and methanol electro-oxidation reaction by modifying a platinum electrode with cysteamine molecules to form a platinum-cysteamine heterogeneous interface, and belongs to the technical field of catalytic energy. According to the invention, mercaptan / thiophenol molecules represented by cysteamine (CYS) are modified on the surfaces of platinum nanoparticles through chemical adsorption, so that a molecule-metal composite catalytic system with an optimized electronic structure is constructed. X-ray photoelectron spectroscopy, in-situ Raman spectroscopy and theoretical calculation prove that the catalytic performance of surface adsorption molecules is remarkably improved through a dual-action mechanism, on one hand, the electronic structure of platinum is regulated and controlled to reduce a reaction energy barrier, on the other hand, interface charge transfer kinetics is promoted, and the oxidation process of formic acid through a formate path is effectively optimized. The technical scheme has universality to various mercaptan / thiophenol molecular systems, and the strategy can also be used for improving the performance of methanol oxidation reaction. The invention provides a novel catalytic material system for developing efficient direct formic acid and methanol fuel cells, and has important application value in the field of clean energy conversion devices.

The invention belongs to the field of chemical reagents, and particularly relates to a preparation method of alcohol-free acetone. The preparation method comprises the following steps: S1, carrying out primary adsorption by using a 4A molecular sieve and a 5A molecular sieve; s2, carrying out secondary adsorption by using a 4A molecular sieve, a 5A molecular sieve and a 10X molecular sieve; s3, adding sodium iodide into the acetone solution subjected to secondary adsorption treatment according to a solid-to-liquid ratio of 1: 4; s4, washing the crystal with absolute ether at least twice, then carrying out solid-liquid separation, and heating and distilling at 80-100 DEG C; s5, repeating S3 and S4, and carrying out secondary crystallization and crystal cleaning; s6, carrying out dehydration treatment on a crude product subjected to secondary distillation by using a 3A molecular sieve; and S7, carrying out rectification on the dehydrated crude product alcohol-free acetone in a temperature range of 80-100 DEG C. According to the technical scheme, before sodium iodide is added for adduct crystallization and purification, a step-by-step molecular sieve adsorption pretreatment process is introduced. According to the process, two molecular sieves with matched pore diameters and polarities are adopted, an industrial-grade acetone raw material is sequentially subjected to two times of adsorption treatment, and the purpose of synergistic purification is achieved by targeting different impurities.

A method for removing halogen ions adsorbed on the surface of a metal nanocrystal is characterized in that the halogen ions adsorbed on the surface of the metal are removed through strong adsorption of [BH4] <-> and H <-> released by hydroboron and the metal, and surface modification and effective dispersion of the metal nanocrystal are realized by introducing proper molecules (or groups) to be adsorbed on the surface. Therefore, removal of halogen ions on the metal surface, adsorption of specific molecules (or groups) and dispersion of metal nanocrystals are realized. According to the method, halogen ions on the metal surface can be removed and replaced, and then characteristic modification and effective dispersion on the surface of the metal nanocrystal are achieved.

The invention belongs to the technical field of gas detection pretreatment, and particularly relates to a multistage deep water removal pretreatment system for atmospheric trace gas detection. In order to efficiently remove water vapor and interference components in sample gas and solve the problem of interference of a high-humidity environment on quantitative analysis of trace gas, a four-stage cascade water removal structure is adopted, and the water removal limit of a single-stage technology is broken through through a physical synergistic mechanism of condensation (phase change dehumidification), membrane separation (selective permeation), cryogenic treatment (ultralow temperature capture) and adsorption (molecular sieve capture). The full-automatic deicing logic based on a fixed time period (non-temperature sensing) thoroughly avoids manual intervention.

The present invention relates to a flow cell for electrically controllable ad- and desorption of molecules from and into a liquid. Particularly, the present invention relates to a flow cell comprising a chamber comprising an inlet and an outlet which define therebetween a fluid path for the liquid and a volume for containing the liquid provided along said fluid path, the volume comprising a device comprising (a)two electrodes comprising a conductive surface, (b) a stationary phase between said two electrodes, wherein said stationary phase is not in direct contact with said electrodes, (c) a controller functionally associated with a power supply configured for applying and changing a voltage between said electrodes, wherein changing the voltage between said electrodes changes the affinity of molecules so as to adsorb said molecules to said stationary phase or desorb molecules from said stationary phase when said molecules are adsorbed to said stationary phase.

The application relates to the field of VOCs treatment, and discloses a VOCs adsorption molecular sieve, a preparation method and application thereof. The method comprises the following steps: 1) sequentially performing first ion exchange, calcination and second ion exchange on NaY molecular sieve to obtain NH4NaY molecular sieve; 2) performing hot-pressing treatment on the NH4NaY molecular sieve and water under the condition that the pressure is 0.1-0.7 MPa to obtain hot-pressing treated molecular sieve; and 3) performing acid treatment on the hot-pressing treated molecular sieve and acid. In step 1), the first ion exchange and the second ion exchange are performed under the condition that the pressure is 0.2-1.5 MPa. The method only needs to perform two ammonium ion exchanges and once calcination under the pressurized condition to prepare the NH4NaY molecular sieve with extremely high exchange degree, and further prepare the VOCs adsorption molecular sieve with excellent adsorption performance without long-time and multiple water vapor treatment at high temperature.

This invention relates to a method for preparing and applying an ordered silver nanoparticle@bismuth nanosheet@copper mesh array. First, bismuth nanosheets are grown on the surface of a copper mesh through an etching reaction using an immersion method. Then, silver nanoparticles are sputtered onto the surface of the bismuth nanosheets, resulting in an ordered silver nanoparticle@bismuth nanosheet@copper mesh array film. This array film is then immersed in a 4-p-aminobenzaldehyde (4-ABZ) solution, adsorbing 4-ABZ molecules onto the surface of the silver nanoparticle@bismuth nanosheet@copper mesh array as signal probe molecules. The silver nanoparticle@bismuth nanosheet@copper mesh array with adsorbed 4-ABZ molecules is then placed as a substrate in a packaging environment containing seafood, meat, or other meat-derived foods. The SERS signal intensity of the 4-ABZ molecules on the substrate surface is used to monitor the freshness of the meat-derived foods. As the freshness of the meat-derived foods decreases, the SERS signal of the 4-ABZ molecules on the substrate surface gradually decreases. Meanwhile, the silver nanoparticle@bismuth nanosheet@copper mesh array also exhibits excellent SERS signal response and signal uniformity for organic dye pollutant molecules such as rhodamine 6G and 4-aminobenzylthiophenol (4-ATP), and has important application prospects in the field of environmental monitoring.

The invention provides an application of a solid waste composition, the solid waste composition contains two solid wastes of red mud and coal gangue, can adsorb NH3 molecules, is used for preparing a motor vehicle exhaust ammoxidation catalyst, can reduce the raw material cost for synthesizing the catalyst, saves mineral resources, and has a good application prospect. And a research basis is provided for improving the solid waste pollution condition and realizing the national strategic thought of treating waste with waste in the future.

The application discloses a KOH-loaded molybdenum disulfide photothermal catalyst and a preparation method and application thereof, relates to the technical field of photothermal catalytic reduction of CO2, and specifically comprises the following steps: obtaining a homogeneous solution by taking ammonium molybdate tetrahydrate and thiourea as raw materials, obtaining a mixed solution after hydrothermal treatment, performing centrifugal treatment, washing treatment and drying treatment, and then performing one-time calcination treatment to obtain molybdenum disulfide powder, and finally loading KOH to obtain the KOH-loaded molybdenum disulfide photothermal catalyst. The preparation method of the catalyst uses MoS2 with edge coordination unsaturation as a supporting carrier, and through loading of KOH, MoS2 is changed from inert basal plane dominance to high-activity defect structure / alkaline basal plane, the alkaline basal plane makes it easier to adsorb CO2 molecules, form intermediate products, and inhibit the phenomenon that the catalyst is deactivated due to sulfur oxidation loss in the catalytic process. Therefore, the photothermal catalyst has great potential in the reduction of CO2.

The present invention discloses a measuring device and a measuring method for competitive adsorption of multi-component cementitious materials. The measuring device includes several individual components of the measuring device and a test container. The test container contains a concrete simulated pore solution containing a polycarboxylate water-reducing agent, and the individual components of the measuring device are placed in the test container respectively. Each individual component of the measuring device includes a dialysis bag, which is used to allow water and polycarboxylate water-reducing agent to pass through during the adsorption test and to isolate the various components of the cementitious material from the solution in the beaker. The single component of the cementitious material is placed in the dialysis bag. Through this device, each component can fully adsorb PCE molecules and then be easily separated, so as to measure the adsorption amount of PCE molecules on each component separately. During the entire adsorption process, each sample will not interfere with each other, ensuring the consistency of the solution concentration. The competitive adsorption situation is judged by analyzing the adsorption amount of PCE molecules on each component.

The invention relates to the technical field of intelligent nanometer image analysis. The invention discloses an atomic-scale precision surface feature recognition and positioning method based on deep learning multi-modal image fusion, and the method can improve the recognition efficiency and accuracy of a plurality of adsorption molecules and defects on the surface of a crystal, and achieves the automatic recognition and precise positioning of the plurality of adsorption molecules and defects on the surface of the crystal. The method comprises the steps that a target fusion image is obtained, the target fusion image is formed by fusing a positive bias voltage scanning image and a negative bias voltage scanning image, and the positive bias voltage scanning image is an image of the surface of a crystal collected by a scanning tunneling microscope in a positive bias voltage mode; the negative bias scanning image is an image of the surface of the crystal collected by the scanning tunneling microscope in a negative bias mode; and inputting the target fusion image into an atomic-scale precision surface feature recognition and positioning model for positioning detection processing, and obtaining recognition and positioning results of various adsorption molecules and defects on the surface of the crystal.

The present invention provides a method, device and electronic device for determining a surface adsorption model of a plutonium alloy. The method constructs a crystal structure model of plutonium based on the theoretical value of the lattice constant, replaces the plutonium atoms in the crystal structure model with pre-acquired doped atoms to construct an initial plutonium alloy structure model; optimizes the structure of the initial plutonium alloy structure model to obtain a target plutonium alloy structure model in a stable state, and then places the pre-acquired adsorption molecules in the target plutonium alloy structure model in a stable state to construct an initial plutonium alloy surface adsorption model, and optimizes the structure of the initial plutonium alloy surface adsorption model to obtain a target plutonium alloy surface adsorption model that can stably adsorb, solving the technical problem in the prior art that a surface adsorption model cannot be constructed for plutonium alloy materials and meeting the application requirements for plutonium alloy materials in actual application scenarios.

The present invention relates to a silicon carbide / red phosphorus composite material for SERS detection and a preparation method thereof. The present invention discloses for the first time a silicon carbide / red phosphorus composite material that can be used for SERS detection to realize the detection of methylene blue molecules. The material consists of two parts: potato-shaped silicon carbide and red phosphorus. The silicon carbide / red phosphorus composite substrate is prepared by mixing silicon carbide and red phosphorus in different molar ratios. The advantage is that the potato-shaped silicon carbide surface has a large specific surface area, which is conducive to obtaining a composite with red phosphorus material, greatly enhancing the Raman signal of the adsorbed molecules. At the same time, the two materials, silicon carbide and red phosphorus, have matching energy band structures, which can improve the ability of chemical enhancement.

The utility model discloses an efficient oxygen generation system capable of realizing heat exchange and energy recovery, which relates to the technical field of oxygen generation equipment and comprises an air compressor, a gas filter, an adsorption tower, a heat exchange component and an energy recovery component. Air is subjected to three-layer filtration by a gas filter and then enters a compressor, compressed air enters an adsorption tower, and a nitrogen strong adsorption molecular sieve is used for oxygen production. Waste gas of the adsorption tower is guided into the heat exchange component, cold air and hot waste gas are subjected to efficient heat exchange through a copper pipe and a spiral turbulent flow metal sheet in the heat exchange component, preheated air is recycled, and the waste gas subjected to heat exchange enters the energy recovery component to drive a turbine to drive a generator to generate electricity. Impurities in air are effectively removed, oxygen production purity and stable operation of equipment are guaranteed, energy consumption is greatly reduced through heat exchange and energy recovery, and the energy utilization rate is increased.

The present invention relates to a pressure swing adsorption molecular sieve and a preparation method thereof, belonging to the technical field of adsorbents, and comprising the following steps: adding sodium silicate, sodium aluminate, calcium chloride and sodium titanate into an alkaline solution, stirring and mixing to form a uniform synthesis solution, adding a polymer precursor as a carbon source, carrying out hydrothermal reaction, centrifuging the product to separate solids, and then washing with deionized water; drying the washed product and then roasting to activate the molecular sieve to obtain a 5A pressure swing adsorption molecular sieve. The present invention takes silicon as the basic element, and improves the heat resistance and thermal stability of the molecular sieve by doping a certain amount of titanium, aluminum and carbon. Taking the polymer precursor as the carbon source to realize the adjustment of the pore size and adsorption performance of the molecular sieve. At the same time, the heat resistance and its stability under high temperature and high pressure conditions of the present invention are improved.