104 results about "Gaseous diffusion" patented technology

The invention relates to a gas leakage early warning method and system for a chemical industry park. The early warning method comprises the following steps: acquiring real-time temperature and pressure data of a reaction kettle area and a storage tank area; obtaining a historical leakage record of a pipeline joint, and determining a diffusion path prediction boundary; extracting a wind direction and a wind speed in a diffusion path prediction boundary, and determining space-time distribution characteristics; analyzing space-time distribution characteristics, determining an overlapping region and setting concentration monitoring nodes; identifying the concentration contribution ratio of the reaction kettle area diffusion characteristic and the storage tank area diffusion characteristic; integrating the operation data of the pipeline joint diffusion characteristics and the loading and unloading area diffusion characteristics, and determining a diffusion path deviation correction coefficient; combining the deviation correction coefficient with the humidity data of the peripheral diffusion characteristics of the cooling tower; and updating diffusion parameters of the separation tower area diffusion characteristics and the public engineering area diffusion characteristics according to a source intensity estimation result. According to the invention, accurate prediction and early warning of gas diffusion in a complex chemical device area are realized, and the safety management level is improved.

The invention belongs to the technical field of oil-gas field development, and particularly relates to a method for testing the content of adsorbed gas in a coal bed gas diffusion process. The problem that the desorption degree of coal bed gas cannot be clearly known at present is solved. According to the technical scheme, high-temperature and high-pressure isothermal adsorption experiments under the condition of different gas proportions are carried out, methane adsorption-desorption capacity of mixed gas of different proportions under different partial pressures is determined, gas diffusion experiments are carried out to evaluate gas migration capacity in the diffusion process and methane gas partial pressure distribution in a sample, and different experiment results are synthesized to determine the methane gas content of the sample. The desorbed gas content in the coal bed gas diffusion process can be calculated; according to the new method, the proportion of the methane desorption gas amount in the coal bed gas development process can be calculated, and the desorption degree of the adsorbed gas of the coal bed reservoir is evaluated.

The utility model relates to a gas diffusion cascade device for preparing high-abundance nitrogen-15 isotopes by taking nitrogen as a medium. The gas diffusion cascade device comprises a first gas diffusion cascade, a second gas diffusion cascade, a photocatalysis / electro-catalysis device and a high-speed magnetic suspension gas compressor, the first gas diffusion cascade and the second gas diffusion cascade are ladder cascade and respectively comprise a plurality of gas diffusion separation devices; the photocatalysis / electrocatalysis device is positioned between the first gas diffusion cascade and the second gas diffusion cascade; the high-speed magnetic suspension gas compressor is positioned in front of each gas diffusion and separation device in the nitrogen flowing direction; and obtaining the high-abundance nitrogen-15 isotope prepared by taking nitrogen as a medium from the heavy fraction end of the second gas diffusion cascade. The gas diffusion cascade device is high in separation coefficient, large in flow and high in efficiency, the prepared nitrogen-15 isotope abundance is high, and the gas diffusion cascade device is suitable for industrial application.

The invention relates to the technical field of experimental devices for testing diffusion coefficients, in particular to an experimental device for testing the gas diffusion coefficient of a geomembrane and a testing method.The experimental device comprises a gas supply mechanism, a testing mechanism and a stretching mechanism, the testing mechanism comprises a reaction testing cylinder, and the reaction testing cylinder comprises an upper cavity and a lower cavity; one side of the lower cavity communicates with the air supply mechanism, a containing assembly is arranged between the upper cavity and the lower cavity, and the clamping assembly of the stretching mechanism is detachably connected to the middle of the containing assembly. The problem that the gas diffusion coefficient test of the geomembrane under the coupling action of aging and tensile stress cannot be simulated in the prior art is solved, and a reliable experimental device is provided for evaluating the long-term anti-seepage performance of the geomembrane under the actual working condition.

The invention discloses a phosphorane mixed gas filling method, and relates to the technical field of mixed gases, the phosphorane mixed gas filling method comprises instrument pretreatment, step-by-step filling, post-vacuum treatment, quality detection and safety monitoring, and the phosphorane mixed gas filling method has the advantages that a mixed accelerant is added into a filling pipeline in the phosphorane and argon filling process, so that the filling efficiency is improved; by providing a large number of active sites and unique gas diffusion channels, uniform mixing of phosphorane and argon can be accelerated, the uniformity and accuracy of mixed gas matching are improved, in the process of action of an accelerant and gas, argon molecules are fully contacted and collided with dissociated and adsorbed phosphorus atoms under the guidance of a special structure of a nano-porous material, and the phosphorus atoms are separated and adsorbed. The mixed accelerant is added to promote rapid and uniform mixing of the phosphorus and the alkane, stable and accurate-proportion phosphorus and alkane mixed gas is formed, and in the whole process, the mixed accelerant continuously plays a role, so that the uniform mixing efficiency of the mixed gas in the filling process is greatly improved compared with a traditional mode.

The invention relates to the technical field of chemical gas, in particular to a chlorine leakage detection method and system in reaction kettle production. The method comprises the following steps: acquiring chlorine concentration values and wind field vectors of a plurality of positions around a reaction kettle at each moment; marking any moment as a target moment, and determining the gas diffusion contribution coefficient of each position to other positions at the target moment; determining a real gas diffusion contribution coefficient of each position to other positions at the target moment; determining the airflow correction density of each position at the target moment; and positioning a chlorine leakage source by using a density peak clustering algorithm based on the airflow correction densities of all positions at the target moment. According to the method, the wind field vector is introduced to construct the gas diffusion contribution coefficient to correct the density, the limitation of traditional static diffusion is overcome, the real leakage source and the concentration convergence point in the downwind direction are effectively distinguished, the accuracy and reliability of chlorine leakage source positioning are improved, and support is provided for safe emergency disposal.

The invention provides a combustible and toxic gas monitoring method and system, and the method comprises the steps: dynamically adjusting the density of a sensor based on a historical leakage risk weight, collecting multi-modal environment data, and carrying out the fusion correction, and generating an environment data set; constructing a gas diffusion model based on the environmental data set, predicting future concentration distribution in combination with environmental variables, and identifying a high-risk region; aiming at a high-risk area, an optimization objective function is designed by taking minimization of gas concentration distribution and energy consumption as optimization objectives, an optimal control strategy is generated through the optimization objective function, and temperature, wind speed and ventilation intensity are adjusted to inhibit gas diffusion; and an optimal control strategy is executed and real-time feedback optimization is performed, so that system robustness and energy consumption balance are ensured. According to the invention, the monitoring and control process of gas leakage can be dynamically optimized, more accurate safety management is realized, and the safety and energy efficiency of industrial places are effectively improved.

The invention discloses a multiphase substance filling method for a discarded roadway of a coal face of a spontaneous combustion coal seam. The method comprises the following steps: S1, determining a closed position of the discarded roadway; s2, drilling holes beside the scrapped roadway and laying gas production pipes; s3, an inner side sealing wall is built in the scrapped roadway, and an air injection pipe is arranged; and S4, CO2 gas is injected into the scrapped roadway on the inner side of the inner side sealing wall through a gas injection pipe, and leakproofness detection and other steps are carried out. According to the discarded roadway, sealing and gravel filling are only conducted on the portion, 30 m away from the coal face side, of the discarded roadway through the two sealing walls, CO2 gas is injected into the discarded roadway, after rocks on a top plate of the goaf continuously collapse, the goaf is continuously compacted again, then liquid CO2 is injected into the discarded roadway, and permanent sealing and storage of the goaf can be achieved. And drilling holes are constructed in the periphery of the scrapped roadway, gas in the drilling holes is sampled through the gas production pipe, the diffusion range of CO2 gas in the scrapped roadway is detected, and it is guaranteed that liquid CO2 in the scrapped roadway does not leak.

The invention provides a mine goaf gas monitoring method and device, electronic equipment and a storage medium, and belongs to the technical field of mine monitoring. The method comprises the steps that gas data collected by sensors arranged in different areas of a goaf are acquired, and a gas concentration matrix with time and space correlation is generated based on the gas data; establishing a gas diffusion model based on geologic structure data and ventilation parameters of the goaf, and inputting gas data into the gas diffusion model to calculate a gas concentration prediction matrix of the goaf; determining a target monitoring strategy based on a deviation coefficient matrix of the gas concentration matrix and the gas concentration prediction matrix; and monitoring the goaf based on the target monitoring strategy. According to the mine goaf gas monitoring method and device, the electronic equipment and the storage medium, the accuracy of mine goaf gas monitoring is improved.

Method and system for electrochemically compressing hydrogen. In one embodiment, the system includes a membrane electrode assembly (MEA) that includes a polymer electrolyte membrane (PEM), an anode, and a cathode. First and second gas diffusion media are positioned adjacent the cathode and anode, respectively. A humidifying membrane is positioned next to the second gas diffusion medium on a side opposite the anode. A water supply is connected to the humidifying membrane, and a hydrogen gas supply is connected to the second gas diffusion medium. A hydrogen gas collector including a back pressure regulator is connected to the first gas diffusion medium. Separators, positioned on opposite sides of the MEA, are connected to a power source. In use, hydrogen is electrochemically pumped across the MEA and collected in the hydrogen gas collector. The PEM is kept properly humidified by the humidifying membrane, which releases water into the second gas diffusion medium.

The application discloses a kind of based on heat trigger solid-liquid reaction's goaf spontaneous combustion initiative inerting device and method, belong to coal mine fire prevention technical field, first based on experimental data, goaf beam tube monitoring and numerical simulation determine goaf high temperature prevention area, under the influence of setting safety margin and considering the maximum thickness of residual coal determine the starting temperature of adaptive inerting device, then according to goaf residual coal thickness, porosity, oxygen concentration field and high temperature prevention area area calculate out initiative inerting device size and reagent filling amount, finally combine the effective coverage area of single device and honeycomb grid generation algorithm, design initiative inerting device dynamic pre-buried point, and pre-bury initiative inerting device in coal mining face, when device reaches the high temperature protection area of goaf deep, temperature sensing guide column paraffin melt, aluminum sulfate solution in liquid reagent storage tank flows into solid reaction bin and sodium bicarbonate reaction along guide column, generate a large amount of CO2 from exhaust port, rapidly reduce local oxygen concentration, eliminate goaf spontaneous combustion hazard.The core innovation of the application is to abandon the traditional passive prevention mode relying on gas diffusion, and instead adopt the initiative control mechanism of "temperature sensing trigger-in-situ reaction-directional release", so that CO2 directly acts on the high temperature area through the directional exhaust port, rapidly reduces the local oxygen concentration, cuts off the necessary condition of coal spontaneous combustion from the source, realizes the initiative identification and accurate inerting of goaf high temperature area, and ensures the safety production of coal mining face.

The application relates to a gas detection device and a gas concentration detection method. The gas detection device comprises a micro-detection chamber, a power source, an air outlet, a gas diffusion resistance element, and a working electrode. The volume of the micro-detection chamber is fixed, and the micro-detection chamber is provided with an air inlet. The power source is connected with the micro-detection chamber. The air outlet is connected with the power source. The gas diffusion resistance element is arranged in the micro-detection chamber. The working electrode is connected with the gas diffusion resistance element, and the working electrode is provided with a catalytic material. The working electrode is used for detecting a response value of a to-be-detected gas concentration and / or consuming the to-be-detected gas. The gas detection device has a small volume and a simple structural design. When the gas concentration is detected, a small amount of gas is required. According to specific experimental requirements, the gas detection device with different structural features can be used for measuring a single gas concentration or a mixed gas concentration.

The invention relates to a high-purity reactor for regenerating low-concentration bicarbonate and application of the high-purity reactor. The reactor comprises a cathode end plate, a gas diffusion cathode, a cation exchange membrane, an intermediate plate, a proton exchange membrane, an anode and an anode end plate which are sequentially arranged, the middle plate is provided with a middle cavity, a third feeding port and a third discharging port, and a solid electrolyte layer is arranged in the middle cavity; the cathode end plate is provided with a first feed port, a first discharge port and a groove-shaped first runner, and the anode end plate is provided with a second feed port, a second discharge port and a groove-shaped second runner; the reactor utilizes low-concentration bicarbonate to regenerate high purity on the basis of an electrochemical principle, the utilization rate of resources such as oceans / lakes is increased, the regeneration purity is 99%, industrial-grade current density can be achieved, the stability of the reactor is high, and the reactor has industrial application potential and wide application prospects.

This application relates to the technical field of dust removal, and in particular to a multi-stage dust removal device and method for coal mine roadways with impact resistance. The device includes an upward-opening water tank with an outlet on the side. A rotating shaft is rotatably mounted on the bottom of the water tank via a bearing. A cavity for air passage is formed inside the rotating shaft. A pushing mechanism is installed on the part of the rotating shaft located inside the water tank, and a pre-treatment mechanism that cooperates with the cavity is installed on the top of the rotating shaft. The pushing disc and the fan-shaped plate cooperate to push impurities floating on the water surface upward, which can effectively remove floating impurities on the water surface and prevent them from forming a barrier film on the water surface. This creates an unobstructed channel for gas diffusion. That is, when the water surface is kept clean and unobstructed, the gas can escape from the water surface more smoothly, the separation efficiency of impurities and gas is significantly improved, and thus the dust removal effect of the gas is greatly improved.

The invention discloses a goaf spontaneous combustion active inerting device and method based on thermal trigger type solid-liquid reaction, and belongs to the technical field of coal mine fire prevention and extinguishing. The method comprises the following steps: determining the starting temperature of an adaptive active inerting device under the conditions of setting a safety margin and considering the influence of the maximum thickness of residual coal, and then calculating the size of the active inerting device and the reagent filling amount according to the thickness of residual coal in a goaf, the porosity, an oxygen concentration field and the area of a high-temperature control region; finally, combining the effective coverage area of a single device and a honeycomb grid generation algorithm, designing a dynamic pre-embedded point location of the active inerting device, pre-embedding the active inerting device on a coal face, and when the device reaches a high-temperature protection area in the deep part of a goaf, melting paraffin in the temperature-sensing flow guide column when the device is heated, so that the temperature-sensing flow guide column reaches the high-temperature protection area in the deep part of the goaf. An aluminum sulfate solution in the liquid reagent storage tank flows into the solid reaction bin along the flow guide column to react with sodium bicarbonate, a large amount of CO2 is generated and discharged from the exhaust port, the local oxygen concentration is rapidly reduced, and the natural ignition hidden danger of the goaf is eliminated. The core innovation of the invention lies in that a traditional passive prevention and control mode depending on gas diffusion is abandoned, and an active prevention and control mechanism of'temperature sensing trigger-in-situ reaction-directional release 'is adopted, so that CO2 directly acts on a high-temperature area through a directional exhaust port, the local oxygen concentration is quickly reduced, the necessary condition of coal spontaneous combustion is cut off from the source, and the coal spontaneous combustion is realized. Active recognition and precise inerting of the high-temperature area of the goaf are achieved, and safe production of a coal mining working face is guaranteed.

The invention belongs to the technical field of metal powder preparation, and particularly relates to a method for preparing metal powder through intermittent gas supply reduction. The method comprises the following steps: in a metal oxide heating stage, continuously introducing a reducing gas; and when the temperature is raised to the reduction reaction temperature of the metal oxide, intermittently introducing reducing gas until the reduction reaction is finished. By means of intermittent gas supply, reduction reaction by-products can be discharged in time, the gas environment of a reduction reaction interface is updated, the problems that in traditional continuous gas supply, by-products are accumulated, and the gas diffusion efficiency is low are solved, efficient and uniform reduction of a thick material layer (larger than or equal to 50 mm) can be achieved, and the prepared metal powder is high in uniformity.

A gas sensing device is manufactured with three dimensionally connected metal oxide foam structure of large surface area and elongated channel pores within the three-dimensional porous structure for gas sensing applications, thereby increasing the surface area of the sensing layer and expediting sensitivity and sensor response. A gas sensor device includes the fabricated metal-oxide-foam sensing material attached via silver paste to platinum electrodes and ruthenium heater that are printed on low temperature co-fired ceramic substrate. This device will provide improved gas sensing performance with improved sensitivity and response time. Gas sensors including the metal oxide foam sensing material exhibit higher sensitivity to toxic gases such as ethanol and carbon monoxide due to the large surface area achieved from the porous three-dimensional structure providing increased chemical reaction sites and the larger porous channels allowing gases to easily pass, shortening the gas diffusion reaction path.

The present application relates to the technical field of chemical gas, and particularly relates to a method and system for detecting chlorine leakage in the production of a reaction kettle. The method comprises: obtaining chlorine concentration values and wind field vectors of multiple positions around the reaction kettle at each time; taking any time as a target time, determining a gas diffusion contribution coefficient of each position to the remaining positions at the target time; determining a real gas diffusion contribution coefficient of each position to the remaining positions at the target time; determining a gas flow correction density of each position at the target time; and based on the gas flow correction densities of all positions at the target time, locating a chlorine leakage source by using a density peak value clustering algorithm. The present application corrects the density by introducing the wind field vector to construct the gas diffusion contribution coefficient, overcomes the limitations of the traditional static diffusion, effectively distinguishes the real leakage source and the concentration collection point downwind, improves the accuracy and reliability of the chlorine leakage source positioning, and provides support for safety emergency disposal.

A diagnostic device (30, 30A) diagnoses a reactor (FC, EC). The diagnostic device comprises an impedance measurement unit (32, 32A) that measures the internal impedance of the reactor, and a storage unit (M) in which there is stored an equivalent circuit model simulating the electrochemical characteristics of the reactor. The diagnostic device furthermore comprises: a parameter identification unit (34, 34A) that identifies parameters within the equivalent circuit model; and a state diagnosis unit (36, 36A) that diagnoses the internal state of the reactor on the basis of the equivalent circuit model, in which the parameters identified by the parameter identification unit (34, 34A) are used. The equivalent circuit model includes one or more anode diffusion resistors and one or more anode diffusion capacitances as parameters indicating the gas transport characteristics of an anode of the reactor. The parameter identification unit identifies parameters including an anode diffusion resistor and an anode diffusion capacitance on the basis of a physical quantity having a correlation with the gas diffusion rate in the anode of the reactor.

The present application relates to an atomic layer deposition system, comprising: a body, a carrier, a gas spraying module and a first ring. The body surrounds a reaction chamber; the carrier is located in the reaction chamber. The gas spraying module is arranged on the body and comprises at least one gas inlet and at least one gas diffusion plate between the carrier and the at least one gas inlet, each gas diffusion plate comprises a plurality of perforations. The first ring defines a radial direction and is arranged between the carrier and the at least one gas diffusion plate. The plurality of perforations distributed in the area of the at least one gas diffusion plate defines an outermost distribution contour, the radial dimension of the inner wall of the first ring is greater than the radial dimension of the outermost distribution contour, and the inner wall of the first ring and the outermost distribution contour maintain a distance in the radial direction. The inner wall of the reaction chamber of the present application is not easy to generate residues, effectively reduces the production cost and has good manufacturing effect.

To provide a gas diffusion plate detecting method that accurately predicts the use life of a gas diffusion plate, reduces production costs, and improves production efficiency and electronic equipment therefor, and a gas diffusion plate detection device.SOLUTION: A gas diffusion plate detection method includes: acquiring image data and contour data on a gas diffusion plate to be detected; detecting the hole diameter and surface flatness of the gas diffusion plate to be detected; and estimating the use life of the gas diffusion plate to be detected based thereupon.SELECTED DRAWING: Figure 1

The invention relates to the technical field of mine safety monitoring and gas detection, and discloses a sensor for mine AI identification of automobile exhaust and fire source CO. The sensor comprises a dual-channel sensitive element which is arranged in the same gas chamber and has a cross-sensitive characteristic; the signal conditioning acquisition module carries out digital processing on the original signal; the dynamic hysteresis compensation module carries out time domain alignment on the two paths of signals based on the fluid dynamic characteristics of the gas chamber, and response asynchronization caused by gas diffusion difference is eliminated; the concentration decoupling calculation module constructs a linear equation set by using a sensitivity matrix, and separates the real-time concentrations of carbon monoxide and nitrogen oxide; and the intelligent identification early warning module logically distinguishes gas sources according to the concentration threshold. Through the hydrodynamic compensation and linear decoupling algorithm, calculation errors caused by electrochemical sensor cross interference and response lag are effectively solved, accurate recognition of rubber-tyred vehicle tail gas and real fire hazards is achieved, and the mine false alarm rate is reduced.

Described is an electrolyzing device comprising a first electrode configured to generate a first gas and a second electrode configured to generate a second gas. The first and second electrodes are arranged to face each other to define an electrolyte space for receiving an electrolyte between the first electrode and the second electrode. At least one of the first and second electrode is a gas diffusion electrode comprising a gas diffusion backbone layer facing away from the electrolyte space and comprising conductive porous material; a catalyst layer facing the electrolyte space and comprising an electrochemically active catalyst, wherein the catalyst layer further comprises hydrophobic particles with an average size of 10 nm - 5 µm, and a microporous layer comprising conductive particles with an average size of 15 nm - 2 µm and hydrophobic particles with an average size of 10 nm - 5 µm and arranged between the gas diffusion backbone layer and the catalyst layer. Also described are a gas diffusion electrode for use in said device, as well as a method of manufacturing said gas diffusion electrode.

The utility model discloses a kind of drying device, it includes box and gas storage tank, gas diffusion plate and heating element from top to bottom being arranged in the inside of the box, the top of the box is provided with several air inlet holes, bottom is provided with several air outlet holes, the bottom of the gas storage tank is provided with several first diffusion holes, the gas diffusion plate is provided with several second diffusion holes, gas is entered into the gas storage tank from the air inlet hole and sequentially diffused to the heating element on the first diffusion hole, second diffusion hole heating, heated gas is blown out through the air outlet hole. The utility model improves the uniformity of gas distribution, so that gas heating is more sufficient, uniform, can guarantee the uniformity of product drying, can avoid the phenomenon of local overheating, so as to guarantee the drying quality of product.

The application discloses a method for preparing formate by electro-reduction of carbonate and application thereof. The method comprises the following steps: 1) loading a tin-based oxygen-containing compound electrode as a working electrode, an Ag / AgCl electrode or an Hg / HgO electrode as a reference electrode, a platinum electrode as a counter electrode, and a carbonate solution as an electrolyte to assemble a three-electrode system, and loading the electrolyte into a gas diffusion electrochemical reaction cell; 2) introducing oxygen-containing gas into the gas diffusion electrochemical reaction cell, and then sequentially performing local reduction of the tin-based oxygen-containing compound, electro-reduction of the carbonate and regeneration of the tin-based oxygen-containing compound by electrifying, and the above steps are cyclically performed. The method for preparing formate by electro-reduction of carbonate has the advantages of simple operation, simple equipment, reliable principle, low cost, high stability and the like, and is suitable for large-scale industrial application.

The application provides a spraying assembly, a reactor of a deposition device and an air inlet and outlet system thereof. The spraying assembly is arranged in a cavity of the reactor and comprises a gas passage plate arranged at an upper portion of the cavity and a shower head arranged in the cavity. The gas passage plate is provided with a gas inlet and a gas outlet. The gas inlet is arranged at a central portion of the cavity on the gas passage plate, and the gas outlet is arranged at a position deviated from the central portion. The shower head comprises a first region provided with a plurality of spraying holes and a second region provided with a plurality of exhaust holes. The spraying holes make the gas diffusion cavity and the reaction cavity in fluid communication, and the exhaust holes are in fluid communication with the gas outlet. The uniformity of the process gas flow distribution in the reaction cavity is adjusted by adjusting the size, shape and distribution of the spraying holes in the first region and / or adjusting the size, shape and distribution of the exhaust holes in the second region, so as to accurately control the uniformity of the thickness of the film formed by the deposition device and the film forming quality, thereby improving the production efficiency of the thin film deposition.

The invention relates to a method for inhibiting toxic and harmful gas in a leachate pool of an urban garbage dump. The method comprises the steps of three-dimensional closed system construction, precise spraying adsorption system configuration and flexible operation and maintenance of an auxiliary system. According to the invention, gas diffusion is blocked through the three-dimensional sealing cover, and a high-pressure micro-mist spraying technology is combined, so that micron-sized adsorbent mist is in full contact with harmful gas, the adsorbent has high-efficiency adsorption capacity on multi-component gases such as hydrogen sulfide and carbon monoxide, the concentration of the harmful gas in a sealed space is greatly reduced, and the removal efficiency can reach 90% or above; the selected composite adsorbent takes modified zeolite as a core component, harmless treatment or recycling can be performed after adsorption saturation, and no new pollutants are generated; meanwhile, the closed system avoids direct contact between the adsorbent and the external environment, and overcomes the defects that in the prior art, the treatment efficiency of poisonous and harmful gas in the percolate pool of the urban garbage dump is low, the poisonous and harmful gas is easy to diffuse, and secondary pollution is possibly generated.

Method for determining a diffusion coefficient of a diffusion of a first gas (79) through a porous material (2) into a second gas (80) at a gas pressure increased by at least 900% compared to atmospheric pressure, - wherein a sample (1) of the porous material (2) is arranged as a partition of defined thickness between a first gas space (58) and a second gas space (59), wherein the first gas space (58) is at least 5 times the size of an open pore volume of the sample (1), - wherein the first gas space (58), the open pore volume of the sample (1) and the second gas space (59) are purged with the first gas (79), - wherein the purging with the first gas (79) is completed and the first gas space (58) adjacent to the sample (1) is sealed off, - wherein the second gas (80), which is distinguishable from the first gas (79), is subsequently introduced into the second gas space (59) with a defined volume flow rate, and a gas mixture (81) comprising the second gas (80) and components of the first gas (79) is discharged from the second gas space (59), - wherein the diverted gas mixture (81) is maintained at the increased gas pressure and - wherein a concentration profile of the proportion of the first gas (79) in the gas mixture (81) derived from the second gas space (59) is recorded and analyzed with respect to the diffusion coefficient.

The application discloses a phosphine mixed gas filling method, and relates to the technical field of mixed gas, which comprises instrument pretreatment, step-by-step filling, post-vacuum treatment, quality detection and safety monitoring. The phosphine mixed gas filling method has the advantages that: by adding a mixing accelerator in the filling pipeline during the filling of phosphine and argon, a large number of active sites and unique gas diffusion channels are provided to accelerate the uniform mixing of phosphine and argon, and the uniformity and accuracy of the mixed gas ratio are improved. During the action of the accelerator and the gas, the argon molecules fully contact and collide with the dissociated and adsorbed phosphorus atoms under the guidance of the special structure of the nano-porous material, the uniform mixing of the two is promoted, and the stable and accurately-proportioned phosphine mixed gas is formed. During the whole process, the mixing accelerator continuously plays a role, so that the uniform mixing efficiency of the mixed gas during the filling process is greatly improved compared with the traditional method.

The invention relates to the technical field of gas sensors, in particular to a potential type carbon dioxide sensor based on a porous spherical ZnCo2O4-ZnO sensitive electrode, which comprises a solid electrolyte substrate, a platinum reference electrode, the porous spherical ZnCo2O4-ZnO sensitive electrode, a signal acquisition component and a fixing assembly. The sensitive electrode is prepared through a hydrothermal method, electrostatic spinning and other processes, and has high specific surface area and excellent gas diffusion performance. According to the invention, the detection sensitivity, selectivity and response speed of carbon dioxide can be obviously improved, the cross sensitivity is reduced, and high-precision monitoring requirements in a complex environment are met. Tests show that the sensor has the characteristic of quick response to low-concentration carbon dioxide at 450 DEG C and has a good application prospect.