19 results about "Hydrogen analysis" patented technology

The invention discloses a preparation method and application of a pine needle nanosheet composite copper-cobalt alloy phosphide hydrogen evolution catalyst, and relates to the technical field of electro-catalysis. The copper-cobalt alloy phosphide hydrogen evolution catalyst is obtained by adopting electrolyte containing a copper source, a cobalt source, a phosphorus source and an inorganic fluoride complexing agent, taking foamed nickel as a working electrode and carrying out electro-deposition by utilizing a constant voltage method. On the basis of low cost and a simple synthesis method, the electronic structure of the catalyst is adjusted, and the electron transfer efficiency and the stability of active sites are improved, so that an excellent water electrolysis hydrogen evolution effect is realized, and a new solution is provided for the development of the field of clean energy.

The utility model discloses a sample cutting platform for processing oxygen, nitrogen and hydrogen analysis samples, relates to the field of detection devices, and specifically comprises a first supporting frame, a second supporting frame fixedly arranged at the top of the first supporting frame, an n-shaped component for fixing a handle of a sample cutting forceps, and an adjusting nut adaptively connected to the n-shaped component, the bottom ends of four second supporting rods are fixed on the top surface of the first rectangular frame; the length dimension of the second rectangular frame is smaller than the length dimension of the first rectangular frame, two n-shaped components are respectively installed on two opposite sides of the first rectangular frame, two threaded ends of the n-shaped components pass through the first rectangular frame and are connected with the adjusting nut, the two n-shaped components can also be installed on the second rectangular frame, the n-shaped component can fix the handle of the sample cutting forceps, and the operation is convenient, the first rectangular frame and the second rectangular frame form two planes with a height difference, both of which are used to install the sample cutting forceps, and are suitable for people of different heights to perform sample cutting operations.

The invention relates to an R-STO photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. Cubic-phase SrTiO3 nanoparticles are synthesized by adopting a high-temperature molten salt medium, reduced graphene oxide attached to the surface of SrTiO3 is reduced by using ascorbic acid to obtain RGO / SrTiO3 nanoparticles, and then a final product named R-STO photocatalyst is obtained by using a photodeposition method and can be applied to the field of photocatalytic full water splitting. Compared with an existing photocatalyst, the R-STO photocatalyst is good in controllability and high in stability, the cubic-phase SrTiO3 nanoparticles with the special morphology can effectively inhibit photogenerated electrons and hole recombination, the separation efficiency of carriers is further improved, and synchronous water decomposition, hydrogen evolution and oxygen production can be achieved. The method is green and environment-friendly, simple, convenient to operate and low in material preparation cost, conforms to the green and environment-friendly concept advocated at present, and has a wide application market prospect.

This invention relates to the field of big data analytics, specifically to a big data-based residual oil hydrotreating analysis system, comprising a data acquisition module, a path identification module, a disturbance confirmation module, an efficiency evaluation module, and a section output module. In this invention, multi-source dynamic data from the residual oil hydrotreating process is synchronized in time and reconstructed periodically. Path deviation behavior is screened based on dual thresholds for the direction and magnitude of feed rate changes. Disturbance trends are classified and identified by combining rate difference gradients. Furthermore, the directional matching relationship between aromatic concentration and hydrotreating efficiency is correlated, constructing a coupling response labeling mechanism among multi-source indicators. This enables dynamic tracking of the intrinsic causal relationship between feed disturbances and efficiency changes, clearly distinguishing between trend fluctuations and random disturbances. High-confidence coupling identification labels are output within the overlapping intervals of multi-source data, enhancing the perception of complex changes in the reaction process and improving the real-time performance and accuracy of operational condition judgment.

The invention discloses a transition metal-based composite electrode for hydrogen production by alkaline electrolysis of water and a preparation method thereof, and the preparation method comprises the following steps: 1) uniformly dissolving a first transition metal salt and a second transition metal salt in the same organic alcohol respectively, and then mixing the two obtained salt-alcohol solutions to obtain a uniform and stable electro-deposition solution; and (2) a two-electrode system is adopted, the conductive substrate serves as a cathode, the cathode and an anode are immersed in the electrodeposition liquid for electrochemical deposition, then washing and drying are conducted, and the transition metal-based composite electrode evenly deposited with the binary alloy particle layer is obtained. According to the method, the single organic alcohol is selected as the electrode liquid solvent, and the front transition metal chlorate is selected as the solute, so that the introduction of the oxometallate is avoided, the direct conversion from the low-valence front transition metal ions to the rough alloy particle deposition layer is realized, the deposition energy consumption is effectively reduced, and the deposition efficiency is improved. And meanwhile, the catalyst has higher intrinsic hydrogen evolution activity and good mechanical strength and chemical stability, and is suitable for popularization.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a Cu-doped MnMoO4 photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: grinding copper sulfate pentahydrate into a MnMoO4 precursor, and changing the molar ratio of a copper source to obtain the MnMoO4-x% Cu composite material with different molar ratios, which can be applied to the field of hydrogen evolution by photocatalytic decomposition of water. Compared with an existing photocatalyst, the Cu-doped MnMoO4 photocatalyst has the advantages that the controllability is good when the Cu-doped MnMoO4 is used as a catalyst, the separation efficiency of current carriers is further improved, and the Cu-doped MnMoO4 photocatalyst is relatively high in hydrogen yield and relatively good in stability when being applied to photocatalytic water decomposition. The method is green and environment-friendly, simple, convenient to operate and low in material preparation cost, conforms to the green and environment-friendly concept advocated at present, and has a wide application market prospect.

The invention provides a synergistic method of an alkaline water electrolysis hydrogen evolution catalyst, and belongs to the technical field of water electrolysis hydrogen production, the method comprises the following steps: S1, selecting or preparing a certain amount of a hydrogen evolution catalyst A; s2, taking a certain amount of transition metal hydride B, and compounding the transition metal hydride B with the hydrogen evolution catalyst A in the S1 to obtain a composite material C; and S3, performing electrochemical testing on the hydrogen evolution catalyst A, the transition metal hydride B and the composite material C to obtain an electrolyzed water cathodic polarization curve. According to the method, the catalyst and the transition metal hydride are compounded, the alkaline hydrogen evolution catalytic activity can be improved, the power consumption of hydrogen production through water electrolysis is reduced, and the synergistic technology has the advantages of being low in cost, remarkable in effect and high in universality and has important application value in the field of hydrogen production through alkaline water electrolysis.

A movable phosphine hydrogen analysis and treatment device comprises a main body, a heat dissipation opening is formed in the front face of the main body, an air inlet and a charging port are formed in the right side of the main body, an air outlet is formed in the left side of the main body, corresponding strap frames are arranged on the two sides of the main body, and a display screen, indicator lamps and operation keys are arranged at the top of the main body. A protection assembly is arranged on the air inlet and comprises a fixing block, a sealing cover and an air pump, the air pump is located in the main body and communicates with the air inlet, a sensor is arranged on the left side of the air pump, a signal converter is arranged on the left side of the sensor, and a data analyzer is arranged above the signal converter; and a tail gas treatment device is arranged on the left side of the data analyzer, the tail gas treatment device communicates with the gas outlet, the gas inlet can be protected through the protection assembly when the gas inlet is not used, it is prevented that foreign matter enters the gas inlet, cleaning is difficult, meanwhile, operation of the device is affected, and the use safety of the device is improved.

The utility model relates to a gasification furnace burner leakage analysis system, which comprises a gasification furnace and a burner, the burner is arranged on the gasification furnace, the burner is provided with a cooling water circulation system, and the cooling water circulation system comprises a gas-liquid separator with an inlet connected with the burner; the on-line hydrogen analysis sampling pipe is connected with a gas outlet of the gas-liquid separator; an inlet of the burner cooling water tank is connected with a liquid outlet of the gas-liquid separator; the overflow pipe is arranged on the side wall of the burner cooling water tank; the tail end of the overflow pipe extends below the liquid level of the liquid seal tank; the manual analysis sampling pipe is arranged on the overflow pipe; and the burner cooling water pump provides power for the cooling water circulation system. Cooling water is introduced into a gas-liquid separator, the hydrogen content of separated gas is detected, whether leakage occurs or not is judged, separated liquid enters a nozzle cooling water tank and enters a liquid seal tank through an overflow pipe, if bubbles are generated at the tail end of the overflow pipe, sampling and analysis are carried out through a manual analysis sampling pipe on the overflow pipe, and if leakage gas exists, the nozzle leaks.

The utility model discloses a thermal conductivity type hydrogen analyzer which comprises a hydrogen conveying pipeline and hydrogen analysis equipment, the hydrogen conveying pipeline is connected with a shunting pipeline penetrating through the hydrogen analysis equipment, and the hydrogen analysis equipment is internally connected with a sealed detection box; a gas inlet cavity, a stable detection cavity and a backflow cavity which are communicated with one another are sequentially formed in the sealed detection box from front to back, a top plate of the hydrogen analysis equipment is connected with a thermal conductivity type analyzer, the thermal conductivity type analyzer is connected with a sensing module extending into the stable detection cavity, and the flow dividing pipeline is connected with a gas inlet pipeline communicated with the gas inlet cavity. And the shunting pipeline is connected with a backflow pipeline communicated with the backflow cavity. Compared with the prior art, the hydrogen analysis device has the advantages that the split-flow hydrogen analysis equipment is arranged in the hydrogen conveying pipeline and is matched with a thermal conductivity type analyzer, so that the analysis accuracy can be ensured while rapid analysis is carried out.

The utility model provides a hydrocarbon analysis gasification device for an air separation unit, which comprises a main cooler, a vaporizer and a capillary tube used for connecting a to-be-detected position of the main cooler and the vaporizer, the capillary tube is spirally arranged along the vaporizer, the outlet end of the capillary tube is connected with at least two outlet pipelines, and the at least two outlet pipelines are provided with stop valves; according to the utility model, the safety and accuracy of hydrocarbon analysis of the air separation device are improved, and the gasification stability of hydrocarbon liquid oxygen is ensured.

The application discloses an automatic clamping and dumping experimental device for hydrogen permeation detection samples of enamel steel, an automatic dumping mechanism is fixedly installed on a rack, an automatic lifting clamping mechanism is fixedly arranged on a turnover bearing platform, a hydrogen analysis pool is arranged on a lifting bearing platform of the automatic lifting clamping mechanism, a hydrogen charging pool is arranged above the hydrogen analysis pool, a sample to be tested is clamped between the hydrogen charging pool and the hydrogen analysis pool through an O-shaped sealing ring, automatic clamping and sealing between the sample to be tested, the hydrogen charging pool and the hydrogen analysis pool are realized through the automatic lifting clamping mechanism; a sealing pressure sensing unit is used for detecting pressure changes when the hydrogen charging pool, the sample to be tested and the hydrogen analysis pool are moved upwards on the lifting bearing platform to realize clamping and sealing, and transmitting pressure signals to a control host; the control host is connected with the automatic lifting clamping mechanism, the automatic dumping mechanism and the sealing pressure sensing unit respectively, and is used for controlling sample clamping, sealing detection and dumping recovery processes.

The invention belongs to the technical field of electrolytic hydrogen evolution. Aiming at the problems of limited catalytic activity and low stability existing in the current NiMo alloy catalyst, the invention provides a nickel foam-supported nitrogen-phosphorus co-doped NiMo-based composite catalyst N, P-MoNi4 / Ni2Mo3O8 / Ni3Mo3C@NF and a preparation method and application thereof, which is obtained by a two-step hydrothermal method; a nitrogen-containing polymer is used as a carbon source and a nitrogen source, phosphomolybdic acid is used as a phosphorus source and a molybdenum source, and nickel foam is used as a carrier. Under hydrothermal conditions, the nitrogen-containing polymer and phosphomolybdic acid are co-modified onto a nickel foam skeleton to obtain a polyoxometalate / polymer composite supported by nickel foam; phosphomolybdic acid, nickel chloride and urea are then co-hydrothermally treated to grow nickel-molybdenum oxide nanoflowers on the polyoxometalate / polymer composite supported by nickel foam; and finally, high-temperature calcination is performed under an inert atmosphere to obtain N, P-MoNi4 / Ni2Mo3O8 / Ni3Mo3C@NF. The catalyst has hydrogen evolution performance and high stability similar to that of precious metal platinum.

The invention relates to the technical field of logging, in particular to a quantitative sample injection system and method for a petroleum logging non-hydrocarbon analyzer, and the quantitative sample injection system comprises a main box body, an air compressor, and a sample pump, a gas path control module, a carbon dioxide analysis module, a combustible gas analysis module, a hydrogen analysis module and a waste gas treatment module which are positioned in the main box body; the method comprises the following steps: (1) pipeline connection; the device is reasonable and compact in structure and ingenious in conception, and the pressure of sample gas supplied into the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module is monitored in real time by arranging the first pressure sensor, the second pressure sensor and the third pressure sensor; by arranging a first pressure control valve, a second pressure control valve and a third pressure control valve, the pressure and the flow speed of sample gas supplied into the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module are quantitatively adjusted, and the device has the characteristics of stability, reliability and quantification.

The invention discloses a high-strength steel laser welding seam delayed cracking performance evaluation method. The method comprises the steps of welding sample plate preparation, welding parameter setting, laser welding, hydrogen measuring sample plate sampling, comparison sample sampling, diffusible hydrogen analysis, stress loading testing, loading stress setting, delayed fracture testing, hydrogen resistance evaluation and the like. According to the method, the hydrogen concentration of the high-strength steel after laser welding can be obtained, the stress and the hydrogen concentration can be combined, and the minimum stress value of delayed cracking under different laser welding process conditions is obtained. By means of the threshold stress value and the hydrogen concentration obtained through the method, reference can be provided for the delayed cracking risk of the high-strength steel laser welding joint, and guidance is provided for improvement of the hydrogen resistance and safe use of the high-strength steel welding process.

The invention discloses a pair of multi-alkaline electrolytic water hydrogen production monitoring systems which comprises a plurality of alkaline liquid circulating pumps, each alkaline liquid circulating pump is connected with an alkaline electrolytic bath through a pipeline, the cathode end of each alkaline electrolytic bath is jointly connected with an oxygen-in-hydrogen analysis assembly, and the anode end of each alkaline electrolytic bath is jointly connected with an oxygen-in-hydrogen analysis assembly. A monitoring assembly is connected between each alkaline electrolytic cell and the oxygen-in-hydrogen analysis assembly through a pipeline, each monitoring assembly is connected with the oxygen-in-hydrogen analysis assembly, all the alkaline liquor circulating pumps are jointly connected with an alkaline liquor cooler, and the alkaline liquor cooler is connected with the oxygen-in-hydrogen analysis assembly and the oxygen-in-hydrogen analysis assembly. And each monitoring assembly is in data connection with a controller. The invention further discloses a multi-alkaline water electrolysis hydrogen production monitoring method. According to the one-to-many alkaline electrolytic water hydrogen production monitoring system and monitoring method, the problem that the hydrogen content in oxygen of each electrolytic cell cannot be monitored is solved.

The invention provides medium-shallow soil natural hydrogen consumption and migration simulation equipment and an evaluation method, and belongs to the technical field of natural hydrogen, and the medium-shallow soil natural hydrogen consumption and migration simulation equipment comprises a core holder, a covering pressure tracking pump, a temperature controller, a nuclear magnetic magnet, an in-situ soil environment microorganism culture medium, a gas chromatograph and a hydrogen tank. The core holder is used for clamping a prepared soil sample; the overburden pressure tracking pump is connected to the two ends of the core holder through pipelines; the temperature controller is connected with the core holder; the nuclear magnetic magnets are arranged around the core holder; and the in-situ soil environment microorganism culture medium is connected with the core holder. According to the method, the consumption capacity of different strain combinations on the natural hydrogen escaping from the shallow surface is simulated and analyzed, the migration trend and occurrence state of the natural hydrogen in the soil are visually represented by combining a nuclear magnetic resonance technology, the migration and consumption trend of different florae on the natural hydrogen is determined, and an analysis and evaluation system for the natural hydrogen on the shallow surface is established. The underground natural hydrogen state is reversely deduced, and guidance is provided for natural hydrogen exploration.

The utility model discloses a cleaning device for steel sample detection, which relates to the technical field of steel sample detection, and comprises a cleaning inner container, a cleaning basket, a water tank, a water inlet pipe, a water outlet pipe and a water outlet pipe, a plurality of containing cavities are defined by the inner wall of the cleaning basket and the longitudinal and transverse partition plates. A plurality of through holes are respectively formed in the side wall and the bottom of the cleaning basket. The device can contain a plurality of steel samples at a time, the plurality of steel samples can be independently separated, sample mixing is avoided, meanwhile, the cleaning basket can be placed in the cleaning inner container added with water and a solvent, and the plurality of steel samples can be cleaned at the same time; the cleaning efficiency of the steel sample is greatly improved, so that the detection efficiency of the steel sample is improved, the structure is simple, the maintenance is convenient, the production cost is reduced, and the ultrasonic cleaning of granular samples for analyzing carbon, sulfur, oxygen, nitrogen and hydrogen in steel is met.

The invention discloses a hydrogen production mode identification method and system based on a tree classifier, and belongs to the technical field of hydrogen analysis, the hydrogen production mode identification method based on the tree classifier comprises the following steps: S1, extracting the original component content of a hydrogen sample; s2, constructing engineering features based on the original component content, wherein the engineering features comprise a component proportion, a composition entropy, logarithm transformation, a component interaction item and a principal component; and S3, hydrogen production mode identification: taking the engineering characteristics as input, synthesizing minority class oversampling for relieving class imbalance, and performing hydrogen production mode judgment through a tree classifier. By adopting the technical scheme, the hydrogen production mode can be quickly analyzed by utilizing the tree classifier based on the original component content and engineering characteristics of the hydrogen sample.