41 results about "Molecular gases" patented technology

The invention discloses a low-energy-consumption nitrogen-charging grain storage system and method, and relates to the field of nitrogen-charging grain storage. The method comprises the steps that compressed air is sequentially introduced into a filter set, a drying machine and a micro-oil adsorber to be purified and dried; stripping oxygen O2 molecules and water H2O molecules in the air by using a carbon molecular sieve pressure swing adsorption tower to obtain nitrogen N2 molecular gas; inputting nitrogen N2 molecular gas into a cold drying system, and cooling to a preset temperature range; detecting whether the concentration of the output nitrogen N2 molecular gas meets a preset concentration range or not by using an oxygen analyzer; and when the detected N2 molecular gas concentration of the nitrogen is lower than the lower limit of the preset concentration range, starting a circulating pump to suck the mixed gas in the closed warehouse to the carbon molecular sieve pressure swing adsorption tower for adsorption and nitrogen production again until the N2 molecular gas concentration of the output nitrogen meets the preset concentration range. Aiming at the problem that the nitrogen concentration in nitrogen-filled grain storage is difficult to accurately control in the prior art, accurate control of the nitrogen concentration and yield is realized.

The invention discloses an improved discrete velocity method for rotation unbalance calculation of diatomic molecules, and relates to the field of numerical simulation of rarefied gas dynamics. The method comprises the steps that a flow field is initialized according to actual working conditions, a Boltzmann equation based on a Rykov model is adopted as a control equation, a collision-free Boltzmann equation is solved to obtain a unit interface distribution function, a macroscopic equation flux corresponding to a local solution of the collision-free Boltzmann equation and a macroscopic equation flux corresponding to a Navier-Stokes equation considering the molecular rotation effect are calculated, and a unit interface distribution function is obtained; performing weighted calculation on the two types of fluxes according to the rarefaction degree of the gas to obtain a macroscopic flux, solving a macroscopic adjoint equation to obtain an estimated macroscopic quantity and an estimated equilibrium state distribution function, solving a microcosmic control equation to update the distribution function, and integrating the distribution function to update the macroscopic quantity and judge the convergence. On the basis of keeping the conciseness of the traditional semi-implicit discrete velocity method, the method can achieve the precise prediction of the full-basin unbalanced flow field of the diatomic molecular gas.

The invention relates to analcime with an ANA structure and a preparation method of the analcime, the chemical molecular formula of a unit cell of the analcime with the ANA structure is Na < x > [SiyAlzO96], x is equal to 6-15, y is equal to 30-37, and z is equal to 10-16; the analcime with the ANA structure has a spherical crystal morphology. The analcime with the ANA structure disclosed by the invention has a spherical crystal morphology, shows excellent molecular diffusion performance, and has a good application prospect in the fields of small molecular acid catalytic reaction, small molecular gas adsorption separation, ion adsorption purification and the like.

The present invention relates to a preparation method of a multi-ordered silicon-carbon anode material, comprising the following steps: (S1) performing chemical vapor deposition on porous carbon to obtain a silicon-carbon precursor I with a silicon content of 20-30 wt%; (S2) sequentially performing heat treatment on the silicon-carbon precursor I with a small molecule gas A and an organic lithium salt, to obtain a silicon-carbon precursor II, wherein the small molecule gas A is at least one of CO2, N2O, and CO; (S3) performing chemical vapor deposition on the silicon-carbon precursor II to obtain a silicon-carbon precursor III; (S4) sequentially performing heat treatment on the silicon-carbon precursor III with a small molecule gas B and an organic lithium salt, to obtain a silicon-carbon precursor IV, wherein the small molecule gas B is at least one of water vapor and O2; (S5) performing carbon coating on the silicon-carbon precursor IV to obtain a multi-ordered silicon-carbon anode material. The preparation method of the present invention realizes the efficient utilization of the pores of the porous carbon while achieving the staged, continuous, and uniform distribution of silicon.

The invention relates to the technical field of single-molecule devices, in particular to a single-molecule device for detecting small-molecule gas based on supramolecules and a preparation method of the single-molecule device. The monomolecular device comprises a functional molecule and a graphene electrode pair, wherein the functional molecule is connected between the graphene electrode pair through an amido bond. A cucurbituril hydrophobic cavity structure in the functional molecular structural formula can contain and capture target small molecular gas, gas molecules of different volumes are selectively included through multiple weak interaction, a dynamically-adjustable subject-object compound structure is formed, and then switching type sensing detection on the small molecular gas is achieved. The amino terminal of the end part of the main bridging unit in the functional molecule can be connected with the carboxyl terminal of the graphene point electrode in a covalent bond manner, and amide condensation molecular chain connection is formed at the two ends of the graphene point electrode, so that the stability of a monomolecular device is improved. The preparation method provided by the invention is simple in process, mild and controllable in reaction condition and beneficial to large-scale production.

The invention relates to the technical field of catalyst preparation, and discloses a monolithic catalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) carrying out acid treatment on a regular carrier; (2) mixing an alcoholic solution of a titanium source with an aqueous solution containing a microporous template agent and a silicon source, aging, removing alcohol, and then mixing the obtained gel solution with a titanium silicalite molecular sieve seed crystal and a mesoporous template agent; (3) mixing the mixed solution obtained in the step (2) with a metal oxide, and carrying out ball milling to obtain coating slurry; and (4) mixing the coating slurry with a mixed solution containing a noble metal precursor and an optional structural additive, adding the obtained mixed slurry into a regular carrier subjected to acid treatment, and then sequentially performing purging, drying, roasting and reduction. The monolithic catalyst prepared by the invention shows a better catalytic effect in the process of catalytic oxidation of carbon-based oxygen-containing molecule gas, and the catalyst has obviously better stability and is suitable for continuous long-period operation.

The application provides a molecular gas chamber leakage rate detection method, an electronic device and a detection system. The method can include: testing spectrum data of a to-be-detected molecular gas chamber; calculating a half-height width of the spectrum data according to the spectrum data; and determining a leakage rate of the to-be-detected molecular gas chamber based on the half-height widths obtained at multiple times. In the method, the leakage rate detection accuracy of the molecular gas chamber can be better ensured without affecting the purity in the molecular gas chamber.

The invention discloses a method, a device, equipment and a medium for determining long-distance atmospheric transmission characteristics, relates to the technical field of atmospheric transmission characteristic calculation, and aims to solve the problem that the atmospheric transmissivity of more than 100km cannot be calculated in the prior art. The method comprises the following steps: acquiring atmospheric parameters in a first target height range; determining an atomic gas absorption coefficient and a molecular gas absorption coefficient corresponding to each height based on the gas component, the number density, the first absorption section and the second absorption section; carrying out summation calculation on the atomic gas absorption coefficient and the molecular gas absorption coefficient to obtain a mixed gas absorption coefficient; and determining the atmospheric transmittance in the first target height range by adopting an atmospheric transmission function according to the mixed gas absorption coefficient. The long-distance atmospheric transmission characteristic determination method provided by the invention is used for realizing accurate calculation of atmospheric transmissivity above 100km.

The application discloses a modified two-dimensional metal organic framework nanosheet membrane, a preparation method thereof and gas separation application. The original two-dimensional metal organic framework nanosheet membrane is controllably modified through solvent vapor treatment, the interaction force between adjacent nanosheet layers in the nanosheet membrane is enhanced, and the passage of macromolecular gas along the channel between the nanosheet layers is inhibited, so that the separation selectivity is improved. The preparation and modification method of the original nanosheet membrane comprises the following steps: (1) synthesizing a metal organic framework layered precursor by a solvothermal method; (2) combining a wet ball milling method and an ultrasonic dispersion method to delaminate the metal organic framework layered precursor to obtain two-dimensional metal organic framework nanosheets; (3) assembling the two-dimensional metal organic framework nanosheets into an original two-dimensional layered metal organic framework nanosheet membrane on the surface of a porous carrier; and (4) modifying the nanosheet membrane through solvent vapor treatment. The modified two-dimensional metal organic framework nanosheet membrane prepared by the application has excellent gas separation performance.

The invention relates to a high-precision silver electrode micron-sized patterning method, which mainly comprises the following steps of: preparing a hydrophobic molecular film on the surface of a pretreated substrate by a molecular vapor deposition method, patterning the molecular film by ultraviolet ozone photoetching, and precisely depositing a silver electrode in a pattern area by utilizing a silver mirror reaction. Therefore, the silver electrode with simplified and environment-friendly process, low equipment cost, high processing efficiency, excellent precision and strong material adaptability is prepared.

A method for continuously removing a particular type of gas molecules (“gas molecules”) from a gas stream includes selecting a liquid having an affinity for the gas molecules to be removed, and providing the selected liquid to each of a first and second mat, each mat formed from a plurality of fibers having the ability to retain the selected liquid within longitudinally extending channels having longitudinally extending openings against moving into the space between the individual fibers, the mats in fluid communication therebetween with the selected liquid. The method includes directing the gas stream through a portion of the first mat into contact with the selected liquid along the longitudinally extending openings whereby the selected liquid absorbs the gas molecules, and directing a second gas through a portion of the second mat so that the gas molecules, absorbed by and disbursed throughout the selected liquid, are stripped and carried away.

The invention relates to the technical field of environment monitoring, in particular to a system for detecting Freon through a waveguide grating and a detection method thereof.The system for detecting Freon through the waveguide grating comprises a light source emitting device and a light source used for exciting a detection marker; the gas sampling part is used for forming a signal of a marker to be detected; a waveguide grating for splitting an electron transition spectrum of Freon emitted from the gas sampling unit; the zero-order spectrum filtering element is used for receiving the first-order spectrum line transmitted by the waveguide grating and transmitting the first-order spectrum line to the receiver; the spectrograph is used for receiving the primary spectral line passing through the receiver and detecting the Freon gas according to the primary spectral line; through the arrangement of the system, high-resolution detection of Freon series molecular gases can be realized, technical support is provided for environmental monitoring and industrial safety, and Freon-22, Freon-134A and Freon-1301 can be effectively detected and distinguished according to different Freon series molecular infrared spectrums.

According to the frequency stabilizing device based on the combination of the F-P cavity and the reference cell, a traditional F-P cavity is filled with atomic molecule gas, a feedback signal acts on the cavity length of the F-P cavity through the saturated absorption frequency stabilizing technology, the cavity length is locked on the atomic molecule energy level transition frequency, the interference of the cavity length caused by the environmental influence is overcome, and the stability of the frequency stabilizing device is improved. Meanwhile, the F-P cavity with the locked cavity length is applied to PDH frequency stabilization of a laser. The device is compact in structure, short-term frequency stability of PDH frequency stabilization and long-term frequency stability of saturated absorption frequency stabilization can be considered, and the environmental adaptability of frequency-stabilized laser is improved.

A method for treating to-be-treated water containing tritiated water and light water, the method includes providing a temperature difference in a heavy water gas hydrate substrate which may contain tritiated water, and to-be-treated water containing tritiated water and light water in the presence of a guest molecular gas based on a heavy water gas hydrate crystallization temperature zone and its vicinity under a pressure condition where heavy water gas hydrate or tritiated water gas hydrate can be crystallized.

The application relates to the technical field of catalyst preparation, and discloses a monolithic catalyst and a preparation method and application thereof.The method comprises the following steps: (1) acid treatment is performed on a regular carrier; (2) an alcohol solution of a titanium source is mixed with an aqueous solution containing a micropore template agent and a silicon source, aging is performed, alcohol is removed, and then the obtained gel solution is mixed with titanium-silicon molecular sieve seeds and a mesopore template agent; (3) the mixed solution obtained in the step (2) is mixed with a metal oxide, ball milling is performed, and a coating slurry is obtained; (4) the coating slurry is mixed with a mixed solution containing a noble metal precursor and optional structure assistants, the obtained mixed slurry is added into the acid-treated regular carrier, and then purging, drying, calcination and reduction are sequentially performed. The monolithic catalyst prepared by the application has good catalytic effect in the process of catalyzing and oxidizing carbon-based oxygen-containing molecular gas, and the stability of the catalyst is obviously better, so the catalyst is suitable for continuous long-period operation.

The utility model discloses a gas compressor device for extracting small molecule gas, the gas compressor device is provided with a shell and a Roots blower device, the Roots blower device is arranged in an inner cavity and comprises an impeller assembly, the impeller assembly comprises a pair of impellers, the pair of impellers are located in an impeller cavity, the impellers are centrosymmetric components and are provided with three blades, and the blades of the pair of impellers are meshed with each other; wherein the outer contour shape of each lobe blade is composed of a left half outer contour shape and a right half outer contour shape which are mutually mirrored; according to the direction from the blade top to the blade root of the blade, the outer contour shape of the left half part is provided with a blade top center point, a blade center point, a first transition point, a second transition point, a third transition point, a fourth transition point and a blade root center point; the outer contour shape of the left half part is composed of a blade top opposite rolling arc section, a transition arc section, an involute section, an arc envelope line section, a point meshing cycloid section and a blade root opposite rolling arc section.

The invention relates to a preparation method of a multi-stage ordered silicon-carbon negative electrode material, which comprises the following steps: (S1) carrying out chemical vapor deposition on porous carbon to obtain a silicon-carbon precursor I with the silicon content of 20-30wt%; (S2) carrying out heat treatment on the silicon-carbon precursor I by using a small molecule gas A and an organic lithium salt in sequence to obtain a silicon-carbon precursor II, the small molecule gas A being at least one of CO2, N2O and CO; (S3) performing chemical vapor deposition on the silicon-carbon precursor II to obtain a silicon-carbon precursor III; (S4) carrying out heat treatment on the silicon-carbon precursor III by using a small molecule gas B and an organic lithium salt in sequence to obtain a silicon-carbon precursor IV, the small molecule gas B being at least one of water vapor and O2; and (S5) carrying out carbon coating on the silicon-carbon precursor IV to obtain the multi-stage ordered silicon-carbon negative electrode material. According to the preparation method disclosed by the invention, the pores of the porous carbon are efficiently utilized, and meanwhile, staged continuous and uniform distribution of silicon is realized.

The invention relates to the technical field of transformer and reactor monitoring, and discloses a transformer and reactor oil chromatography on-line monitoring device which comprises a cabinet body, a box body is installed on the inner wall of the cabinet body, a sealing cover is installed on the top of the box body, sample gas and carrier gas are mixed and conveyed to a first conical separation barrel through a first conveying pipe, and a second conical separation barrel is arranged on the top of the box body. A centrifugal force is generated in the process, the mixed gas is screened according to molecular mass, macromolecular gas is thrown to the inner wall, micromolecular gas is left in the center and is conveyed through a second conveying pipe and a third conveying pipe, gas group mixing is avoided, and therefore follow-up separation accuracy is guaranteed; through constant-temperature adsorption of a grating plate and a five-A molecular sieve, ordered separation according to polarity intensity, synchronous rapid separation of small-molecule gas, and arrangement of gas flow into stable laminar flow by using a rectification piece, fine separation of gas components is realized, and the monitoring efficiency is further improved, so that the subsequent monitoring accuracy and stability are improved.

The present invention discloses an improved discrete velocity method for the calculation of diatomic molecular rotational non-equilibrium, which relates to the field of numerical simulation of rarefied gas dynamics. The method comprises: initializing the flow field according to the actual working conditions, using the Boltzmann equation based on the Rykov model as the control equation, solving the collisionless Boltzmann equation to obtain the unit interface distribution function, calculating the macro equation flux corresponding to the local solution of the collisionless Boltzmann equation and the macro equation flux corresponding to the Navier-Stokes equation considering the molecular rotation effect, weighting the two types of fluxes according to the rarefaction of the gas to obtain the macro flux, solving the macro adjoint equation to obtain the estimated macro quantity and the estimated equilibrium distribution function, solving the microscopic control equation to update the distribution function, integrating the distribution function to update the macro quantity and judge the convergence. The present invention can achieve accurate prediction of the full-domain non-equilibrium flow field of diatomic molecular gas on the basis of maintaining the simplicity of the traditional semi-implicit discrete velocity method.

The present invention discloses a microwave plasma waste solid cracking device, which belongs to the field of microwave application technology. The interior of a first shielding shell and the interior of a second shielding shell are connected through a cutoff waveguide tube; a first feed port is provided on the side of the first shielding shell; a first microwave source is used to input microwaves to the corresponding first feed port, so that the waste solid arranged in the first shielding shell is cracked; an igniter is provided on the second shielding shell, and is used to generate a tip discharge to the interior of the second shielding shell to generate plasma; a second feed port is provided on the side of the second shielding shell; a second microwave source is used to input microwaves to the corresponding second feed port, so that the gas molecules input from the first shielding shell are cracked; and a gas outlet is used to output the gas in the second shielding shell. The microwave plasma waste solid cracking device of the present invention uses microwaves to quickly crack waste solids, and then decomposes large molecular gases into small molecular gases that are easy to handle under the impact of plasma, which greatly reduces the harm of gases to the environment.

The present disclosure is directed to a gas sensor device that detects gases with large molecules (e.g., a gas with a molecular weight between 150 g / mol and 450 g / mol), such as siloxanes. The gas sensor device includes a thin film gas sensor and a bulk film gas sensor. The thin film gas sensor and the bulk film gas sensor each include a semiconductor metal oxide (SMO) film, a heater, and a temperature sensor. The SMO film of the thin film gas sensor is an thin film (e.g., between 90 nanometers and 110 nanometers thick), and the SMO film of the bulk film gas sensor is an thick film (e.g., between 5 micrometers and 20 micrometers thick). The gas sensor device detects gases with large molecules based on a variation between resistances of the SMO thin film and the SMO thick film.

The invention belongs to the field of molecular simulation calculation, and particularly discloses a simulation calculation method for catalytic degradation of SF6. On the basis of a density functional theory and a transition state theory, the simulation calculation method comprises the steps of building a nitrogen-doped carbon material molecular model, selecting metal atoms to perform doping modification on a nitrogen-doped carbon material, building an SF6 molecular gas-solid adsorption model, searching an SF6 defluorination reaction transition state and building an SF6 defluorination reaction path. On the microscopic level, the SF6 degradation catalysis effect of the catalyst is calculated, the action mechanism of the catalyst is explained, the calculation is simple, the cost is low, and the method has important significance for researching and exploring a catalytic material for SF6 degradation.

This improves the permeability of small molecular gases such as hydrogen, helium, water vapor, and ammonia, as well as their separation selectivity from other gases such as oxygen, nitrogen, and methane. [Solution] A gas separation membrane having at least a separation functional layer and a sheet layer.

The invention belongs to the technical field of remote plasma sources, and provides a remote plasma source dissociation rate monitoring device and a remote plasma source dissociation rate monitoring method, which are suitable for dissociation rate monitoring when process gas is single-element molecular gas, and the monitoring device comprises a remote plasma source, a heat collecting tube and a heat meter, the remote plasma source is used for dissociating the process gas, and the heat meter is used for measuring the dissociation rate of the process gas. The remote plasma source comprises a gas inlet and a gas outlet; the heat collecting pipe comprises a first pipe wall and a second pipe wall, the first pipe wall is connected with the gas outlet, the second pipe wall is arranged outside the first pipe wall, the two ends of the second pipe wall are connected with the first pipe wall to form a containing cavity, and flowing water is introduced into the containing cavity and used for absorbing heat of the process gas; and the heat meter is used for measuring heat generated by the free radicals after the process gas is dissociated to generate the free radicals and the free radicals are compounded into the gas. The method can solve the problem that the dissociation rate cannot be detected by an infrared spectrum due to the fact that single-element molecular gas is easily compounded into original gas after being dissociated into atoms.

The application provides a frequency stabilizing device based on combination of an F-P cavity and a reference cell, wherein atomic and molecular gas is filled in a traditional F-P cavity, a feedback signal is applied to the F-P cavity length by using a saturated absorption frequency stabilizing technology, the cavity length is locked on an atomic and molecular energy level transition frequency, disturbance of the cavity length caused by the environment is overcome, and the F-P cavity with the locked cavity length is applied to PDH frequency stabilization of a laser. The device has compact structure, can consider short-term frequency stability of the PDH frequency stabilization and long-term frequency stability of the saturated absorption frequency stabilization, and improves environmental adaptability of the frequency stabilized laser.

There is provided a method for generating broadband radiation, the method comprising providing a hollow waveguide having an entrance and an exit and comprising a molecular gas; varying an electric field within the hollow waveguide to alter a rotational energy state of the molecular gas from a first state to a second state; and providing the pump radiation to the entrance of the hollow wave guide to 5 generate the broadband radiation at the exit by Raman scattering from the molecular gas in the second state.

A method for identifying positive cooperating effects in mixed insulating gases based on atomic charge distribution is proposed. This invention addresses the problem that current methods for determining the type of cooperating effects in mixed gases require experimental basis, resulting in high costs and time consumption. A stable structure is constructed for gas molecules A and B, and their interaction configurations. The wave functions of the two gas molecules and the wave functions of the interaction configurations are calculated in relation to the Boltzmann distribution ratio. The electronegativity of the two gas molecules is calculated based on their wave functions. The corresponding atomic charge distributions are calculated based on the wave functions of the three molecules in a neutral state. A linear weighted value of the charge transfer amount of each interaction configuration is calculated based on the Boltzmann distribution ratio. The charge transfer direction is analyzed based on the electronegativity of the two gas molecules and the linear weighted value of each interaction configuration. If the interaction configuration exhibits a characteristic of electron transfer to the less electronegative gas molecule, it is a positive cooperating effect; otherwise, it is a cooperating effect.

According to the nitric acid chambering coconut shell charcoal / ZSM-5 molecular sieve composite material and the preparation method thereof provided by the invention, coconut shell charcoal modified by a nitric acid chambering technology is compounded with a ZSM-5 molecular sieve, so that the pore structure and the specific surface area of the composite material can be remarkably improved, and the adsorption capacity of the composite material on macromolecular gas and organic pollutants is enhanced. Besides, the composite material shows excellent performance in catalytic reaction, has higher reaction activity and selectivity, and can be widely applied to the fields of environmental governance, gas adsorption, catalysis and the like. The technology not only can improve the comprehensive performance of the material, but also can optimize the preparation process, and has a better industrial application prospect.

A plasma engine includes a plasma source that generates ions from molecular gas species received at a gas input where at least some of the ions generated are atomic species ions. An ion extractor is configured to extract ions from the plasma source with an electric field. A housing comprising a recombination region receives ions extracted from the ion extractor. At least some of the atomic species ions recombine into molecular species in the housing, thereby releasing energy for thrust.

The invention relates to the technical field of catalyst preparation, and discloses a monolithic noble metal catalyst as well as a preparation method and application thereof. The monolithic noble metal catalyst comprises a porous regular carrier, an active noble metal component and an auxiliary agent, wherein the active noble metal component and the auxiliary agent are loaded on the porous regular carrier; and the particle size of the active noble metal component is 2-3nm. The method comprises the following steps: (1) sequentially carrying out acid treatment and roasting on a regular carrier to obtain a porous regular carrier; and (2) dipping the porous regular carrier in a mixed solution containing a noble metal precursor and an optional structural additive, and then sequentially carrying out high-pressure air knife purging, drying, roasting and reduction. The monolithic noble metal catalyst prepared by the invention shows a better catalytic effect in the process of catalytically oxidizing carbon-based oxygen-containing molecule gas, and the catalyst has obviously better stability and is suitable for continuous long-period operation.