1078 results about "Hydrogen content" patented technology

The invention belongs to the technical field of back contact cells, and particularly relates to a back contact cell with a passivated specific light receiving surface and a preparation method and application thereof.The back contact cell comprises a substrate, the substrate is provided with a backlight surface and a light receiving surface, the light receiving surface of the substrate is sequentially provided with a first tunneling oxide layer, a doped amorphous silicon layer and a silicon medium anti-reflection layer, the thickness of the first tunneling oxide layer is 0.2-1.5 nm, and the thickness of the doped amorphous silicon layer is 0.2-1.5 nm; the doped amorphous silicon layer is doped with an oxygen element and a hydrogen element, the first tunneling oxide layer is doped with a hydrogen element, and the content of the hydrogen element close to the side of the doped amorphous silicon layer in the first tunneling oxide layer is greater than the content of the hydrogen element close to the side of the substrate. According to the invention, good passivation effect and optical loss can be taken into account, and the passivation effect is enhanced, so that the passivation effect and current of the battery are improved, the efficiency of the battery is improved, and the equipment cost is low.

The present invention relates to a hydrogen sulfide content detection device, and in particular to a hydrogen sulfide content detection device inside a biogas tank. Provided is a hydrogen sulfide content detection device inside a biogas tank that can be easily moved and has accurate detection results. A hydrogen sulfide content detection device inside a biogas tank includes a mounting block, rollers, a bracket, a detector, a pipeline, etc.; rollers are rotatably provided on the front and rear sides of the left and right sides of the lower part of the mounting block, a bracket is provided on the top of the mounting block, a detector is provided on the upper part of the bracket, and pipelines are connected to the left and right sides of the upper part of the detector, and the upper part of the pipeline passes through the top of the bracket. After the straight pipe moves downward, it enters the biogas tank, thereby extracting the gas inside the biogas tank for the detector to detect the hydrogen sulfide content, so that the detection result is more accurate. At the same time, because the device is easy to move, it is convenient for the staff to detect other biogas tanks in turn.

The invention discloses an electrolytic hydrogen production system and method for deeply reducing the hydrogen content in oxygen. Comprising an alkaline electrolytic bath, an oxygen side gas-liquid separator, a hydrogen side gas-liquid separator, an alkaline liquor circulating pump, a first gas-liquid separator additionally arranged on the front side of the oxygen side gas-liquid separator, and a hydrogen-in-oxygen deep separation device for deeply removing hydrogen in an oxygen side gas-phase product, the first gas-liquid separator is additionally arranged in the oxygen-side gas-liquid separation system, so that a deep separation device capable of purifying and dehydrogenating the oxygen-side gas-phase product can be realized, and when the hydrogen content in oxygen at the gas-phase outlet of the oxygen-side gas-liquid separator is relatively high, the hydrogen-in-oxygen deep separation device is started to deeply remove hydrogen in the oxygen-side gas-liquid separation system, so that the hydrogen content in the oxygen-side gas-liquid separation system is greatly reduced. And the hydrogen content in oxygen in the water electrolysis hydrogen production system is reduced, and the safety of the system is improved.

The invention discloses an electrolytic hydrogen production device and method for reducing the hydrogen content in oxygen. The electrolytic hydrogen production device comprises an alkaline electrolytic bath, an enhanced removal pipeline accessory, an anode side gas-liquid separator, an anode side gas treatment device, a cathode side gas-liquid separator, a cathode side gas treatment device, an enhanced removal device, an alkali liquor tank and an alkali liquor circulating pump. The enhanced removal pipeline accessory is arranged on a pipeline between the alkaline electrolytic bath and the anode side gas-liquid separator, and the enhanced removal device is arranged in front of the alkaline liquor tank. According to the invention, the gas-liquid mixed solution on the anode side is primarily dehydrogenated by using the enhanced removal pipeline accessory, the circulating alkali solution is deeply dehydrogenated by using the enhanced removal device, and the hydrogen concentration in oxygen in the water electrolysis hydrogen production system is reduced by reducing the content of dissolved hydrogen in the circulating alkali solution, so that the safety of the system is improved.

The purpose of the present invention is to provide: a steel material which is suitable as a steel structure used in a hydrogen gas environment, has excellent hydrogen absorption resistance in a hydrogen gas environment, and has excellent hydrogen embrittlement resistance; and a method for producing same.　The steel material has a specific component composition, wherein the amount of saturated hydrogen that has entered in a hydrogen gas environment at a hydrogen gas pressure of 40 MPa is less than a predetermined value. The predetermined value is 0.8 ppm by mass when the tensile strength TS of the steel material is less than 500 MPa, and is a hydrogen amount CH (ppm by mass) calculated from formula (1) when the tensile strength TS of the steel material is 500 MPa or more. (1): CH (ppm by mass) = 5.4637e-0.004 × TS (MPa) In formula (1), TS (MPa) is the tensile strength of the steel material.

The invention provides an acoustic coalescence elimination method for hydrogen bubbles in molten aluminum, and belongs to the technical field of molten aluminum bubble elimination. According to the method, sound field collaborative focusing is achieved by arranging a phase control array transducer set in a molten aluminum smelting furnace, primary gathered sound waves and efficient coalescence sound waves are applied in stages according to bubble size evolution in a double-frequency scanning mode, and the hydrogen bubbles in the molten aluminum are eliminated. A target frequency is dynamically adjusted in combination with a bubble resonance frequency optimization model to match the inherent frequency of a bubble, a sound-bubble coupling dynamic tracking system is used for monitoring bubble evolution triggering stage switching in real time, and a sound field focus point dynamically scans and covers a three-dimensional space area through phase delay control. A delay detection method is adopted to eliminate cavitation bubble interference and accurately measure the hydrogen content, sound intensity and frequency parameters are optimized according to a sound field parameter self-adaptive regulation and control model, and the technical problem that hydrogen bubbles in a molten aluminum deep area are difficult to be effectively driven by sound waves and cannot be fully coalesced and eliminated is solved.

A seamless flux-cored wire for 10CrNiCu steel for ships, applied to welding of continuous casting 907A steel for a main hull and composed of a low-carbon steel sheath and a flux core. The diameter of the wire is 1.0-1.4 mm; the filling rate of flux-cored powder is 14%-16%; measured as the mass percentage of the flux-cored wire, the flux core contains rutile, aluminum oxide, ferroboron, zircon sand, quartz, bismuth oxide, potassium titanate, sodium fluoride, electrolytic manganese, ferrotitanium, magnesium powder, manganese-silicon alloy, nickel powder, metal chromium, copper powder, and iron powder. The seamless flux-cored wire for 10CrNiCu steel for ships has the advantages of good welding performance, stable mechanical properties, good crack resistance, low diffusion hydrogen content, high moisture absorption resistance, excellent rust resistance, and the like. Also provided is a method for manufacturing the seamless flux-cored wire for 10CrNiCu steel for ships

The invention discloses a solid hydrogen storage system capacity state estimation method. The method comprises the following steps of: firstly, simplifying a high-dimensional numerical calculation model into a lumped parameter model according to a chemical chemistry kinetic equation of solid hydrogen storage / desorption, and then carrying out linearization processing to obtain a state space equation and a linearization model of a solid hydrogen storage system; then designing extended Kalman filtering for monitoring the state of the solid-state hydrogen storage system, estimating the state of the solid-state hydrogen storage system at the future moment by using an extended Kalman filtering algorithm, and accordingly outputting the state of the hydrogen content SOC of the solid-state hydrogen storage system; and finally, predicting and updating the state of the solid-state hydrogen storage system through loop iteration, and adjusting the SOC estimated value of the solid-state hydrogen storage system in real time. According to the method, the phenomenon of error accumulation in hydrogen flow integration can be avoided, the SOC estimation precision is improved, meanwhile, the hydrogen content state of the system is estimated in real time under the dynamic working condition, dynamic control over system operation is guided, and errors caused by measurement noise and model uncertainty are reduced.

The invention provides the application of the non-dehydrogenation after hydrogen decrepitation treatment in the aspect of improving the residual magnetism of the neodymium-iron-boron magnet. The hydrogen content of the high-hydrogen-content coarse powder which is not dehydrogenated after the hydrogen decrepitation treatment is 1500-3500 ppm. According to the method, dehydrogenation treatment is not carried out especially in the hydrogen decrepitation treatment process, and the alloy coarse powder with high hydrogen content is obtained and used for improving the residual magnetism of the neodymium-iron-boron magnet. According to the preparation method of the high-remanence neodymium-iron-boron magnet, the production process is creatively designed and improved, the total amount of rare earth is reduced through formula design, the hydrogen content of coarse powder is increased, the coarse powder is sieved to remove impurities, an antioxidant is added into the coarse powder, and the measures of secondary high-temperature sintering and the like are adopted, so that the high-remanence neodymium-iron-boron magnet is obtained. And finally, the oxygen content of the magnet is reduced, namely, the beta non-ferromagnetic phase is reduced, and meanwhile, the density of the magnet is improved, so that the residual magnetism Br of the neodymium-iron-boron magnet is effectively improved.

The invention discloses a method for obtaining hydrogen solubility in slag based on microstructure analysis, and belongs to the field of high-temperature melt physical property characterization. The method comprises the following steps: determining initial components of a simulation system; establishing an initial structure model of the water molecule-containing slag system; determining a potential function for describing the simulation system; simulation calculation parameters are set, LAMMPS software is operated for simulation calculation, and simulation result data such as an atomic coordinate file and free energy of a simulation system are obtained; the atomic coordinate file is imported into visual software for statistical analysis and visual processing, and microstructure information of the slag is obtained; and calculating the hydrogen solubility of the slag according to simulation result data such as free energy. According to the method, the microstructure information of the atomic scale of the slag and the hydrogen solubility of the slag are calculated by adopting a molecular dynamics simulation method, so that the blank of experimental data can be filled, theoretical guidance is provided for controlling the hydrogen content of the slag, and a theoretical foundation is laid for controlling the hydrogen content of the molten steel.

The invention discloses an alkaline electrolysis water hydrogen production system and method capable of deeply reducing the hydrogen content in oxygen in multiple ways, a hydrogen side flash tank is arranged in the alkaline electrolysis water hydrogen production system, and dissolved hydrogen deep removal is carried out on hydrogen side alkali liquor passing through a gas-liquid separator through the hydrogen side flash tank; a mixed alkali liquor flash tank is arranged in an alkaline electrolysis water hydrogen production system, and deep removal of dissolved oxygen and dissolved hydrogen is carried out on mixed alkali liquor through the mixed alkali liquor flash tank; a hydrogen side pressure adjusting part capable of adjusting the pressure of a cathode chamber is arranged in a hydrogen side gas-liquid separator system, and an oxygen side pressure adjusting part capable of adjusting the pressure of an anode chamber is arranged in an oxygen side gas-liquid separation system, so that the pressure of the anode chamber of the alkaline electrolytic cell is higher than that of the cathode chamber, and the amount of hydrogen entering the anode chamber from the cathode chamber through a diaphragm is reduced; the concentration of hydrogen in oxygen in the water electrolysis hydrogen production system is reduced, and the safety of the system is improved.

The invention relates to the technical field of metallurgy, in particular to a production method for controlling the hydrogen content in high-carbon manganese steel. According to the method, the packaging specification of the metallurgical auxiliary materials is improved, and the field storage time and the water content of the metallurgical auxiliary materials, the temperature of terminal molten steel of an electric arc furnace, and the adding time and the adding sequence of all materials in the steel ladle pre-deoxidation, precipitation deoxidation and alloying procedures are controlled; in the LF refining process, foam white slag is rapidly formed, the thickness, the components and the retention time of the foam white slag are controlled, the silicon-calcium wire feeding time and the flow of soft blowing argon are controlled, the baking time and the baking temperature of a tundish are controlled in the continuous casting process, casting is protected in the whole process, the fluctuation range of the liquid level of a crystallizer is controlled, and the slow cooling time is prolonged. The hydrogen control mechanism and the hydrogen removal mechanism are closely linked with all the processes, the hydrogen content of the obtained casting blank is reduced to 4.5 ppm or below, air holes, cracks and other defects do not appear on the surface of the casting blank, and subsurface bubbles of 0.5 grade or above do not appear on the low magnification of the casting blank.

The invention belongs to the technical field of welding, and discloses and provides a maritime work steel high-performance non-preheating welding process determination method which comprises the following steps: acquiring a first cold crack sensitivity index required by non-preheating welding at a specific temperature and a critical constraint distance and a critical constraint degree of a base metal sample; obtaining the minimum diffusible hydrogen content of a welding material required in non-preheating welding, and selecting an actual welding material based on the minimum diffusible hydrogen content; the cold crack sensitivity coefficient of the base metal sample is used for optimizing the carbon equivalent of the base metal sample to obtain a new base metal; a second cold crack sensitive index smaller than the first cold crack sensitive index is obtained, and the new base metal corresponding to the second cold crack sensitive index serves as actual base metal; and the time t100 when the peak temperature of the actual welding material and the actual base metal after welding is cooled to 100 DEG C under different welding heat inputs and the critical cooling time tcr of the welding joint are obtained, and the welding heat input when the difference value between t100 and tcr is the maximum serves as the actual welding heat input. A quantitative analysis theory system is provided for developing the welding process, orthogonal tests are avoided, and the method is high in universality.

The present invention relates to a membrane electrode for reducing the hydrogen content in oxygen of a PEM water electrolyzer and a preparation method thereof, by simply adding an organic silicone resin solution in the cathode catalyst slurry preparation process, changing the mass transfer and transfer from the catalyst layer to the porous transmission layer after hydrogen is generated in the test process, reducing the hydrogen flux of hydrogen permeating from the cathode to the anode, and thus reducing the hydrogen content in oxygen. The present invention has the advantages of low preparation cost, simple process and easy operation, and excellent performance.

The utility model belongs to the technical field of hydrogen-rich water machines, and particularly relates to a table type hydrogen-rich water secondary mixing device which comprises a mounting seat, a water outlet pipe, a connecting seat, a pressure pump, a flow blocking piece and a controller, the water outlet pipe is arranged on the mounting seat, the connecting seat is arranged on the bottom side of the mounting seat, the pressure pump is arranged on the connecting seat, the output end of the pressure pump is connected with the water outlet pipe, and the input end of the pressure pump is connected with the hydrogen-rich water input equipment; the flow blocking piece is arranged in the water outlet pipe and used for buffering water flow sprayed out by the pressure pump. The controller is connected with the pressure pump and used for controlling opening and closing of the pressure pump. When hydrogen-rich water needs to be taken, the pressurizing pump can be controlled by the controller to be turned on, the pressurizing pump pressurizes water output by the hydrogen-rich water input equipment and pressurizes hydrogen overflowing from the water and then inputs the pressurized water into the water outlet pipe, and when the water is conveyed in the water outlet pipe, the pressurized water can impact the flow blocking piece, so that the water violently moves in the water outlet pipe; and the overflowed hydrogen can be wrapped again, so that the content of the hydrogen in the water output from the water outlet pipe is increased.

A process for the production of hydrogen comprising the steps of: (i) subjecting a gaseous mixture comprising a hydrocarbon and steam to steam reforming in reformer followed by autothermal reforming with an oxygen-rich gas to generate a reformed gas mixture, (ii) increasing the hydrogen content of the reformed gas mixture by subjecting it to one or more water-gas shift stages in a water-gas shift unit to provide a hydrogen-enriched reformed gas, (iii) passing the hydrogen-enriched reformed gas and an oxygen-rich gas to an oxidation unit containing an oxidation catalyst that converts carbon monoxide present in the hydrogen-enriched reformed gas to carbon dioxide, to form a carbon-dioxide enriched gas mixture, (iv) cooling the carbon dioxide-enriched gas mixture and separating condensed water therefrom, and (v) passing the carbon dioxide enriched gas mixture to a carbon dioxide separation unit to provide a carbon dioxide gas stream and a hydrogen product gas stream.

The invention discloses a hydrogen and pressure on-line monitoring device used in a top space of oil-deficient equipment, which comprises a hydrogen sensing unit, a pressure sensing unit, an MCU (Microprogrammed Control Unit) circuit, an LORA wireless communication circuit, an antenna and a shielding shell, and is characterized in that the hydrogen sensing unit, the pressure sensing unit, the LORA wireless communication circuit and the antenna are connected with the MCU circuit; the hydrogen sensing unit, the pressure sensing unit, the MCU circuit, the LORA wireless communication circuit and the antenna are arranged in the shielding shell; the device is arranged at a top exhaust hole of the oil-deficient equipment; the on-line monitoring device is mounted at the exhaust hole of the oil storage chamber at the top of the low-oil equipment, the condition of low data generated by dead-zone sampling is avoided through the hydrogen content and the pressure in a high-concentration area at the top of the low-oil equipment, the problem of measurement errors caused by non-uniform gas distribution is solved, the response speed is increased, meanwhile, the hidden danger of oil leakage and oil seepage is avoided, and the working efficiency is improved. And the use safety of the monitoring device for the low-oil equipment is improved.

The invention discloses a hydrogen embrittlement-resistant welding wire for tailor welding of ultrahigh-strength aluminum-silicon coating hot-formed steel and a welding method, and belongs to the technical field of metal materials. 5.0%-7.0% of Ni; 0.3%-0.6% of Mo; 0.08% to 0.12% of Nb; mo, Nb and C react to form Mo2C / NbC nanophase fixed free hydrogen; 0.05%-0.1% of V: carrying out a reaction to form VC nanophase fixed free hydrogen; 0.5% to 0.8% of La; 0.3%-0.5% of Ce; 0.1%-0.5% of Ti; according to the invention, hydrogen atoms diffused in the welding process can be captured, the hydrogen content in a welding seam is obviously reduced, and the diffusible hydrogen amount is reduced by more than 40% under the hydrogen capturing effect of retained austenite, so that the hydrogen-induced crack sensitivity is reduced by 70%.

A process for the hydrogenation of carbonyl compounds consisting of the following steps: (a) providing hydrogen with a molar share of deuterium ≤ 100 ppm, based on the total hydrogen content, by electrolysis of water using electrical power generated at least in part from non-fossil energy, (b) hydrogenating a carbonyl compound using the hydrogen provided in step (a) to form the corresponding hydrogenation product, wherein at least one carbonyl group of the carbonyl compound is hydrogenated.

The invention discloses breeding equipment and method for improving the content of beneficial flavor substances in freshwater fish muscles, the breeding equipment comprises a freshwater fish breeding box, a fish feed feeding mechanism, an oxygenation assembly and a hydrogen increasing assembly, the fish feed feeding mechanism comprises a stirring box, a stirring assembly and a blowing assembly, the stirring box is installed above the freshwater fish breeding box, the stirring assembly is installed in the stirring box, and the blowing assembly is installed in the stirring box; the device is novel in structural design and convenient to operate, uniform feeding can be achieved, meanwhile, the oxygen content and the hydrogen content in a culture water body can be adjusted, the oxygen content and the hydrogen content in the culture water body can be adjusted, the oxygen content and the hydrogen content in the culture water body can be adjusted, and the device is convenient to operate and high in practicability. Wherein the hydrogen can improve the content of flavor substances in back muscles and abdominal muscles of the freshwater fish, and the flavor substances mainly enrich sweet taste, fruit taste and flower fragrance.

The invention discloses a method for measuring high and low calorimetric values of blast furnace fly ash, which relates to the technical field of blast furnace fly ash calorimetric values, and comprises the following specific steps: step 1, calibrating the thermal capacity of a calorimeter, continuously measuring a plurality of groups of thermal capacity data, and carrying out average value calculation to obtain the average thermal capacity data of the calorimeter to finish calibration; 2, measuring as received basis moisture of the sample; 3, measuring the air dry basis moisture of the sample; 4, measuring the air dry basis total sulfur content of the sample; 5, measuring the air dry basis hydrogen content of the sample; 6, measuring the cylinder calorific value of the sample; and 7, calculating high and low calorific values. According to the method, a rapid calorimeter is adopted as a detection instrument, a blast furnace dedusting ash sample is put into a sealed oxygen bomb filled with high-pressure pure oxygen to be burnt, the calorific value of a bomb cylinder is obtained, the moisture, total sulfur and hydrogen content of the bomb cylinder are measured and brought into a calorimeter testing system to be calculated, and therefore the high and low calorific values of the blast furnace dedusting ash are measured.

The invention discloses a low-temperature-resistant hydrogen energy unmanned aerial vehicle system capable of adapting to high-altitude flight. The low-temperature-resistant hydrogen energy unmanned aerial vehicle system comprises an unmanned aerial vehicle body, a hydrogen energy fuel cell module, a driving module and a control module, the hydrogen energy fuel cell module generates electric energy through hydrogen and oxygen and provides the electric energy to the driving module, and the driving module drives the unmanned aerial vehicle body to fly; and the control module controls the hydrogen energy fuel cell module according to the flight height and the flight environment temperature of the unmanned aerial vehicle body and the residual hydrogen content in the hydrogen storage bottle, so that the hydrogen energy fuel cell module works in one of the following modes: an intelligent high-altitude oxygen supply mode, a weight-reduction endurance mode and a low-temperature-resistant mode. According to the invention, the problems of low temperature and low oxygen in high-altitude flight can be well solved, and the application prospect is wide; the control module can autonomously select an intelligent high-altitude oxygen supply mode, a weight-reduction endurance mode or a low-temperature-resistant mode to work according to the flight environment and the state of the unmanned aerial vehicle.

The invention provides a neodymium-iron-boron magnet and a preparation method and application thereof, and the preparation method comprises the following steps: preparing a neodymium-iron-boron melt-spun sheet from a magnet raw material, and then carrying out hydrogen demolishing treatment on the neodymium-iron-boron melt-spun sheet to obtain coarse powder; the hydrogen decrepitation treatment comprises a hydrogen absorption step and a dehydrogenation step which are carried out in sequence, and the dehydrogenation temperature is 250-350 DEG C; coating the coarse powder with an organic additive to obtain a coating material; and carrying out grinding, molding, sintering treatment and aging treatment on the coating material to obtain the neodymium-iron-boron magnet. According to the preparation method, the content of hydrogen in the coarse powder is controlled through an incomplete dehydrogenation process, so that the content of impurity elements in the magnet is reduced, degradation of the impurity elements on the magnetic performance is avoided, meanwhile, the problem that cracks are formed in the magnet in the sintering process due to the incomplete dehydrogenation process is avoided in cooperation with a multi-stage sintering process, and the quality of the magnet is improved. And a coating process is matched to protect the magnet, so that the problem that the magnet adsorbs impurities again in a subsequent treatment process is avoided.

The invention provides a method, a system and equipment for optimizing and regulating operating parameters of a hydrogen production system and a medium. The method comprises the following steps: acquiring current, operating pressure, temperature and alkali liquor flow of the hydrogen production system under various different working conditions; based on the current, the operation pressure and the temperature under various working conditions, the electrolysis efficiency of the hydrogen production system under the corresponding working conditions is determined; based on the operation pressure and the alkali liquor flow under various working conditions, determining the hydrogen content in oxygen of the hydrogen production system under the corresponding working conditions; and aiming at the temperature and the corresponding current under each working condition, maximizing the electrolytic efficiency as an optimization target, and carrying out constraint optimization on the operating pressure and the alkali liquor flow under the constraint condition that the hydrogen content in oxygen is smaller than or equal to a preset safety threshold value, so as to obtain the target operating pressure and the target alkali liquor flow under the corresponding current and temperature conditions. According to the method, the electrolysis efficiency can be maximized under the condition of ensuring that the hydrogen content in oxygen meets the safety threshold value.

The invention discloses a method for stably controlling the content of hydrogen in molten steel, which specifically comprises the following steps: (1) baking waste steel fed into a converter, and controlling the loading proportion of the waste steel; (2) the charging proportion of molten iron is controlled, blowing slag charge is added within 8 min before blowing, the using amount and adding time of cold charge are controlled, and slag charge and cold charge with high moisture content are forbidden to be added 10 min after blowing; (3) alloying is carried out when the tapping amount of the converter is 5-20 t, the alloy is baked through a furnace rear alloy baking device and then added into a steel ladle, and the adding amount of the alloy after the converter accounts for 95-100% of the total adding amount of the alloy; pre-melting type refining slag is added along with molten steel during tapping, lime is added after tapping is finished, and the argon flow of a steel ladle is adjusted; (4) supplementing a small amount of lime in the LF refining process, and adjusting the argon flow of a steel ladle; and carrying out alloying after power transmission and temperature rise in refining, adding no alloy or less alloy in refining, then carrying out deoxidation operation, and carrying out soft blowing and online hydrogen determination after the components and the temperature are qualified, and then carrying out continuous casting and pouring on a crane ladle.

A process for manufacturing methanol having a deuterium content of less than 90 ppm based on the total hydrogen content, the process comprising the steps of: (a) providing hydrogen having a deuterium content of less than 90 ppm based on the total hydrogen content by water electrolysis using power generated at least in part from non-fossil renewable resources; (b) providing carbon dioxide; (c) reacting hydrogen and carbon dioxide in the presence of a catalyst to form methanol.

The invention discloses an intelligent preparation method of a high-strength, high-toughness and corrosion-resistant green aluminum frame, and high-value utilization of secondary aluminum is realized through a microalloying component design and a full-process automatic process. The process comprises the following steps: S1, smelting and casting: controlling alloy components (Si is 0.70-0.80%, Mg is 0.60-0.70% and the like, and the tolerance of Fe is widened to be less than or equal to 0.25%), and accurately controlling the hydrogen content (H is less than or equal to 0.17 cm / 100g); s2, homogenizing treatment: preheating (5 DEG C / min to 300 DEG C) in a multi-section homogenizing furnace, keeping constant temperature (560 + / -10 DEG C * 8 hours), and performing composite cooling to eliminate structure segregation; s3, extrusion treatment: optimizing extrusion parameters (the on-machine temperature is 460-480 DEG C, and the speed is greater than or equal to 15m / min); s6, aging treatment: controlling the temperature (the precision is + / -2 DEG C) by a tunnel type continuous aging furnace in combination with a PID algorithm; and S7, oxidation closed-loop treatment: automatically generating a 8-28 [mu] m oxidation film. The method has the advantages that the recycling rate of the secondary aluminum is larger than or equal to 60%, the yield strength is larger than or equal to 280 MPa, the salt spray corrosion resistance is larger than or equal to 1000 hours, the energy consumption is reduced by 24.4%, and the surface defect rate is smaller than or equal to 1%.

A process for the production of hydrogen is described comprising the steps of: (i) reforming a gaseous mixture comprising a hydrocarbon and steam having a steam to carbon ratio in the range of 0.4:1 to 1.8:1, to in a reforming unit comprising an autothermal reformer to produce a reformed gas mixture, (ii) subjecting the reformed gas mixture to an isothermal water-gas shift reaction in an isothermal water-gas shift reactor using water as a heat exchange medium, thereby increasing the hydrogen content of the reformed gas mixture and producing a hydrogen-enriched reformed gas while raising steam, cooling at least some of the hydrogen-enriched reformed gas and separating condensed water therefrom to provide a de-watered hydrogen-enriched reformed gas, (iv) subjecting at least some of the de-watered hydrogen-enriched reformed gas to carbon dioxide separation by performing a reactive amine wash on the hydrogen-enriched reformed gas in a carbon dioxide separation unit to recover carbon dioxide gas and crude hydrogen gas, and (v) subjecting at least some of the crude hydrogen gas to purification in a hydrogen purification unit to produce a purified hydrogen gas and a tail gas, wherein a portion of the tail gas is recycled to the process.

A process for the production of hydrogen is described comprising the steps of: (i) subjecting a gaseous mixture comprising a hydrocarbon and steam to steam reforming in a reforming unit comprising an autothermal reformer to generate a reformed gas mixture; (ii) increasing the hydrogen content of the reformed gas mixture by subjecting it to one or more water-gas shift stages in a water-gas shift unit to provide a hydrogen-enriched reformed gas; (iii) passing the hydrogen-enriched reformed gas and an oxygen-rich gas to an oxidation unit containing an oxidation catalyst that converts carbon monoxide present in the hydrogen-enriched reformed gas to carbon dioxide, to form a carbon dioxide-enriched gas mixture; and (iv) passing the carbon dioxide-enriched gas mixture to a product separation unit to provide a hydrogen gas stream, a carbon dioxide gas stream and a by-product gas stream, wherein at least a portion of the by-product gas stream is compressed and recycled to one or more of the reforming unit, the water-gas-shift unit, the oxidation unit, and the product separation unit.

The invention discloses a metal material delayed cracking threshold hydrogen concentration and stress test method, which comprises the following steps: S1, preparing a sample, treating the surface of the sample, and removing hydrogen concentration surface pollutants in the sample; s2, measuring the material tensile strength of the sample; s3, placing the sample in a hydrogen charging solution in an electrochemical constant current mode for charging hydrogen at different time lengths, and measuring the diffusible hydrogen content; s4, drawing a hydrogen concentration change curve, and preparing samples with different hydrogen concentrations from the samples in the step S3 according to the hydrogen concentration change curve; s5, galvanizing the sample prepared in the step S4 by adopting an electrogalvanizing process; and S6, stress loading is conducted on the sample galvanized in the step S5, and the threshold hydrogen concentration and the threshold stress value are obtained through standing and observation. The hydrogen resistance of the high-strength automobile steel is obtained, the hydrogen embrittlement cracking risk of the high-strength automobile steel under different hydrogen concentration and stress conditions is obtained, and prevention measures are provided.