25 results about "Molecular gases" patented technology

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 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 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 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 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 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 odor treatment in the breeding industry, in particular to an odor separation and intelligent control method for a temporary excrement storage area based on a gas separation membrane. The method comprises the following steps: mounting a gas separation membrane above a temporary excrement storage area to form a lower membrane area and an upper membrane area; the micro negative pressure of the area below the film and the strong negative pressure of the area above the film are preset through the PLC to form a pressure difference gradient; gas fractionation is realized based on the selective permeation characteristic of the gas separation membrane and the negative pressure gradient; data are collected in real time through a sensor, opening and closing of a fan are dynamically adjusted through a PLC, and pressure difference and concentration closed-loop control is achieved. And meanwhile, the cloud data platform predicts the volatilization amount trend, adaptively adjusts the fan in advance, and sets a differential pressure overload and low-concentration retention protection mechanism. The device can efficiently separate micromolecular gas and macromolecular gas, is high in macromolecular retention rate, reduces daily average energy consumption of the system, avoids equipment damage and odor leakage, is adaptive to pig farms of different scales, is high in separation efficiency, is adaptive and energy-saving, and is stable and reliable in operation.

This invention relates to the field of catalyst preparation technology, and discloses a monolithic noble metal catalyst, its preparation method, and its application. The monolithic noble metal catalyst comprises a porous structured support and an active noble metal component and an auxiliary agent supported on the porous structured support. The particle size of the active noble metal component is 2-3 nm. The method includes: (1) sequentially acid-treating and calcining the structured support to obtain a porous structured support; (2) immersing the porous structured support in a mixed solution containing a noble metal precursor and optional structural auxiliary agent, and then sequentially subjecting it to high-pressure gas knife purging, drying, calcination, and reduction. The monolithic noble metal catalyst prepared by this invention exhibits good catalytic performance in the catalytic oxidation of carbon-based oxygen-containing molecular gases, and the catalyst exhibits significantly better stability, making it suitable for continuous long-term operation.

The invention discloses a heating furnace combustion gas monitoring method and device based on a laser Raman telemetry technology, and belongs to the technical field of Raman spectrum analysis, the heating furnace combustion gas monitoring device comprises a pulse laser and a time-gated Raman spectrometer which are arranged outside a heating furnace, and an excitation light path is arranged between the pulse laser and the heating furnace. According to the invention, simultaneous detection of multi-component gases in the combustion furnace is realized by adopting a Raman telemetry technology, the defect that homonuclear diatomic molecular gases are difficult to detect by adopting an absorption spectrum technology is made up, and a Raman signal is generated after a laser light path enters the combustion furnace through an external reflection device; and the gas is transmitted to the time-gated Raman spectrometer after being reflected and enhanced, the external reflecting device and the time-gated Raman spectrometer can realize telemetering treatment on the gas environment in the reflectivity, and monitoring equipment can realize gas measurement without being tightly attached to the surface of the heating furnace, so that the damage to the equipment caused by the high temperature of the furnace body of the combustion furnace is favorably avoided.

The invention 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 discloses an isothermal differential evaluation device and method for catalytic reaction activity in a tar reforming process. The device comprises: a gas supply unit for providing a carrier gas and an isotope-labeled reformed gas; the tar quantitative conveying unit is used for continuously conveying liquid tar; the tar and gas mixing unit is provided with a combined reactor with a throat structure and a conical flow guide part, so that gaseous tar and reformed gas are fully mixed and then flow in a plug flow manner; the isothermal differential catalytic reaction unit is provided with an infrared or microwave heating device and is internally provided with a porous catalyst sheet; the unreacted tar recovery unit is used for collecting unconverted tar in batches through parallel adsorption devices; the gas product testing unit is used for detecting non-condensable small molecule gas components in real time; and the condensable volatile component on-line detection unit is used for analyzing products in real time through a time-of-flight mass spectrum. The isothermal differential reaction characteristics of the catalyst can be accurately evaluated, kinetic data of tar catalytic conversion can be calculated, and the detection result is accurate.

The invention discloses a well type chemical reaction furnace which comprises a furnace body and a furnace cover, a reaction chamber is arranged in the furnace body, heating sources are distributed on the side wall of the reaction chamber, the heating sources can adopt heating wires, heating is safer, temperature control is more convenient and accurate, and a heating reaction kettle and a heat accumulator are further arranged in the reaction chamber. The heating reaction kettle is arranged in the center area of the bottom of the reaction chamber, the heat accumulator is annularly arranged on the outer side of the heating reaction kettle, and the furnace cover is arranged on the furnace body in a sealing and covering mode. Therefore, the pit type reaction furnace collects small molecule gas generated in the heating process of substances for mechanism explanation of the chemical reaction process, and the temperature of the heating reaction kettle can be controlled to slowly and stably rise by indirect heating of the heat accumulator, so that the heat release process of the heat accumulator is more uniform; and the temperature rise process of the industrial furnace body can be simulated more accurately.

The present application relates to the technical field of molecular sieve drier regeneration, and particularly relates to a method for dehydrating and regenerating a molecular sieve drier and application thereof. The method comprises the following steps: in the presence of a regeneration gas, dehydrating and regenerating a water-containing molecular sieve drier to obtain a regenerated molecular sieve drier; wherein the regeneration gas contains an active small-molecule gas capable of reacting with water, and the volume content of the active small-molecule gas in the regeneration gas is not less than 1 vol.%; and the temperature of the dehydrating and regenerating is 100-250 DEG C. The chemical water removal is coupled with the physical thermal dehydration, the regeneration effect is excellent, and the service life of the drier can be prolonged.

The present application relates to a kind of underground salt cavern mixed gas safe storage method, device and system.The method comprises: determining whether the stratification phenomenon of underground salt cavern storage mixed gas, the mixed gas is the mixed gas formed by helium and natural gas;When determining that the stratification phenomenon of underground salt cavern storage mixed gas occurs, the mixed gas that stratification phenomenon occurs is mixed, to make the mixed gas mixed evenly stored in the underground salt cavern.This method can fully ensure the uniform distribution of mixed gas in underground salt cavern helium storage, prevent the stratification of helium small molecule gas and escape leakage and seepage loss from the top roof of salt cavern, ensure the permanent safe storage of helium in mixed gas in helium storage.

The invention belongs to the technical field of activated carbon preparation, and discloses a preparation method of spherical activated carbon for a semiconductor gas sensor, which comprises the following steps: S1, raw material preparation: selecting resin balls with the granularity of 0.7-1.2 mm as raw materials; s2, preparing spherical activated carbon: carbonizing the resin balls in a tubular furnace at the carbonization temperature of 500-600 DEG C; continuously raising the temperature, and introducing an activating agent for activation at the activation temperature of 850-900 DEG C; s3, modification: carrying out acid modification treatment on the spherical activated carbon in S2. The spherical activated carbon which is uniform in dispersion, uniform in particle size, smooth in surface, high in mechanical strength and high in sphericity degree is prepared by screening raw materials and optimizing a preparation process, and the problem of chip falling when the spherical activated carbon is used in a sensor is solved; the surface of the spherical activated carbon is modified, so that the adsorbability and the sensitivity of the spherical activated carbon to specific gas are improved, and the spherical activated carbon can permeate methane (the molecular weight is 0.414 nm) and has excellent selective adsorption performance to gas such as alcohol (the molecular weight is 0.76 nm).