45results about "Nitrogen preparation" patented technology

A method for decomposing ammonia (NH3) to hydrogen (H2) and nitrogen (N2) includes contacting a H2-containing feed gas stream with a carbon material supported metal (M-C) catalyst at a temperature of about 500° C. to form a reduced M-C catalyst; contacting an NH3-containing feed gas stream with the reduced M-C catalyst at a temperature of about 200 to about 600° C. thereby converting at least a portion of the NH3 to H2 and N2, and regenerating the M-C catalyst to form a regenerated M-C catalyst, and producing a residue gas stream leaving the reactor; and separating the H2 from the residue gas stream to generate a H2-containing product gas stream. The regenerated M-C catalyst is substantially free of agglomerated particles and sintered particles.

The invention belongs to the technical field of ocean engineering drag reduction, and relates to a self-adaptive chemical gas production underwater drag reduction layer and a preparation method thereof.The surface of an aircraft is regarded as a gas production place and transformed into an intelligent interface with sensing and feedback capabilities, inert gas generated by reaction of reactants is detained and utilized in situ through microstructure design, and the self-adaptive chemical gas production underwater drag reduction layer is obtained. The independent micro chamber structure avoids diffusion of local failure, the macroscopic flow guide structure relieves the problem of non-uniform gas film distribution, external energy input is not needed, the chemical reaction rate is reversely and adaptively regulated and controlled based on the physical effect generated by gas retention, and therefore a closed-loop passive self-adaptive resistance reduction film layer is formed. Reaction byproducts are environment-friendly water-soluble sodium chloride and water and are removed in a pulse type reaction mode of high-speed water flow scouring and gas retention, so that the risk of permanent blockage is reduced, safety and environment friendliness are achieved, the energy utilization efficiency is high, meaningless waste of gas is avoided, and the cruising ability of fuel is equivalently and greatly improved.

The application provides a hydrogen-ammonia engine combustion and NO x The application relates to a control technology field of a combustion engine, and discloses a synergic control system and a control method, which comprise a controller and a fuel distribution subsystem, an ignition subsystem and an aftertreatment subsystem connected with the controller, wherein the ignition subsystem at least comprises a jet ignition device; the fuel distribution subsystem at least comprises an ammonia fuel storage device, a catalytic decomposer and a hydrogen purification device, the hydrogen purification device is connected with a first supply subsystem and a second supply subsystem, the first supply subsystem is connected with the jet ignition device, the second supply subsystem is connected with the aftertreatment subsystem; and the aftertreatment subsystem at least comprises a primary SCR device and a secondary SCR device connected with the primary SCR device. The application solves the problems that the proportion of hydrogen-ammonia mixed fuel and the combustion process cannot be effectively controlled in the prior art, the engine combustion efficiency is low, and nitrogen oxide emission does not meet the standard.

A method for operating a turbomachine (10) includes directing a stream of ammonia vapor to one or more hot gas path components (300) of the turbomachine (10). This transfers heat from the one or more hot gas path components (300) to the ammonia vapor. The method also includes cracking the ammonia vapor using the heat from the one or more hot gas path components (300), producing hydrogen gas and nitrogen gas. The method further includes directing the hydrogen gas produced by cracking the ammonia vapor to a combustion chamber (24) of the turbomachine (10).

The invention discloses a confinement nitrogen-doped carbon-based denitration catalyst with a layered stacking structure and a preparation method of the confinement nitrogen-doped carbon-based denitration catalyst. The preparation method comprises the following steps: 1) preparing an LDH material with high adsorption performance; 2) adsorbing nitrogen-containing organic matters by using an LDH material with high adsorption performance so as to prepare a reaction product LDO-C; and 3) performing hydrochloric acid hydrothermal treatment on the reaction product LDO-C, and eluting the LDH layered structure, thereby preparing the nitrogen-doped confinement carbon material with the layered stacking structure. The nitrogen-containing organic matter is used as a carbon source and a nitrogen source, LDH is used as a template, the cost is low, and the preparation process is simple and convenient.

The application discloses a method and system for treating high-concentration nitrogen oxide waste gas. The method is characterized in that high-concentration nitrogen oxide waste gas is mixed with natural gas, and then burned to generate high-temperature atmosphere, so that the nitrogen oxide is converted into nitrogen. The application has the advantages of environmental protection, economy, high efficiency and the like.

The invention discloses a method for producing a high-phosphorus-content calcium magnesium phosphate fertilizer by using an industrial byproduct magnesium ammonium phosphate, which comprises the following steps: drying and screening magnesium ammonium phosphate, adding phosphorite, dolomite or serpentine and coke or anthracite, feeding the materials into a smelting furnace according to a ratio, melting and smelting at a high temperature, blowing air or oxygen by an air blower at the smelting temperature of 1400-1600 DEG C for 2-3 hours, and cooling to room temperature to obtain the high-phosphorus-content calcium magnesium phosphate fertilizer. The smelting time is 0.5-4 hours, discharging molten slag from a slag opening of the smelting furnace, and carrying out water quenching to obtain the calcium magnesium phosphate fertilizer; gas generated in the process enters a hot-blast stove along with smelting furnace gas, at the moment, the temperature of a hearth of the hot-blast stove reaches 900-1000 DEG C due to gas combustion, and ammonia reacts with nitrogen oxide in the tail gas to obtain nitrogen and water, and reacts with sulfur dioxide to finally obtain ammonium bisulfate. According to the invention, resource utilization of the industrial byproduct magnesium ammonium phosphate can be realized, the calcium magnesium phosphate fertilizer with high phosphorus content can be obtained, and nitrogen oxides and sulfur dioxide in the tail gas in the production process of the calcium magnesium phosphate fertilizer can be more effectively removed.

The invention provides a graded aperture hydrogen production reactor based on a gate sponge fractal structure. The graded aperture hydrogen production reactor is particularly suitable for efficient, compact and movable hydrogen production scenes in marine environments such as a ship power system taking fluid fuel as a raw material and an offshore hydrogen refueling station. The reactor is provided with a fractal graded aperture reaction cavity constructed based on lattice sponges, a reaction-heat supply integrated structure is integrated, different orders of lattice sponges are communicated with one another through a micro-channel array composed of straight channels or branched channels, and a multi-gradient coordinated regulation reaction area is formed. By virtue of the inherent cross-scale heat and mass transfer strengthening capability of the fractal structure and the self-adaptive matching characteristic of the gradient aperture to a multi-physical field, the conversion efficiency of fluid fuel and the hydrogen yield can be remarkably improved in ocean high-temperature, high-humidity, high-salt and vibration environments, and the comprehensive utilization efficiency of energy is strengthened; the operation stability and the modular expansion capability of the reactor are improved, and the urgent demand of an ocean mobile platform on efficient and reliable hydrogen production equipment is met.

A MnO2 catalyst for efficient catalytic purification of acetonitrile x This paper discusses SiO2@CeO2 catalysts and their preparation methods, belonging to the fields of catalysis chemistry and environmental chemistry. It involves using MnO... x MnO was prepared by loading it onto a SiO2@CeO2 core-shell structure support. x / SiO2@CeO2 catalyst. The preparation method is as follows: silica microspheres are prepared using a method similar to [preparation method], followed by SiO2@CeO2 preparation using a urea decomposition and precipitation method. The above steps are repeated to adjust the CeO2 loading. MnO is then impregnated using an impregnation method. x MnO was prepared by loading the sample onto the surface of a core-shell SiO2@CeO2 support and then calcining the sample in a muffle furnace at 450℃ for 3 hours. x / SiO2@CeO2 catalyst. This catalyst features a uniform dispersion of transition metal oxides on the support surface, exhibiting good catalytic purification performance for acetonitrile, and shows significant application potential in the treatment of nitrogen-containing organic pollutants.

To provide at least one of the improvement of the heat resistance of a CHA type zeolite by a method different from conventional methods for improving the heat resistance, a method for producing the CHA type zeolite that improves the heat resistance, and the CHA type zeolite.SOLUTION: A CHA type zeolite is provided in which the ratio of an integrated intensity of the maximum peak having a peak top at a chemical shift of 3.0 to 3.5 ppm to an integrated intensity of the maximum peak having a peak top at a chemical shift of 4.0 to 4.5 ppm is more than 0.12 but not more than 0.5 in the 1H-MAS-NMR spectrum, and the ratio of the maximum peak height of an absorption peak having a peak top at a wave number of 3630 cm-1 or more and 3650 cm-1 or less to the maximum peak height of an absorption peak having a peak top at a wave number of 3590 cm-1 or more and 3610 cm-1 or less in IR spectrum is 0.40 or more and 1.0 or less.SELECTED DRAWING: None

The invention discloses a production method of high-purity fluorine-nitrogen mixed gas, and belongs to the technical field of fluorine chemical industry. The method comprises the following steps: mixing high-purity nitrogen trifluoride and high-purity nitrogen according to a molar ratio of 1: (5.5-10), introducing the mixture into a cracker, reacting at the reaction temperature of 1000-1250 DEG C under the pressure of 0.2-0.7 Mpa until the pressure is not changed any more, cooling the reacted gas through a condenser, introducing the cooled gas into a buffer tank 1, compressing the cooled gas through a compressor, introducing the compressed gas into a de-heavy rectifying tower to remove heavy component impurities, and recovering the heavy component impurities to obtain the high-purity nitrogen trifluoride. And gas extracted from the top of the rectifying tower is introduced into the buffer tank 2, compressed by the compressor and then filled into a steel cylinder. The nitrogen is introduced into the cracking reaction, so that the safety of the reaction can be ensured, meanwhile, the production links of purifying fluorine gas and removing nitrogen impurities after the nitrogen trifluoride is cracked are reduced, the fluorine-nitrogen mixed gas with the preset concentration can be directly produced, the production cost is reduced, the production links are reduced, and the 20% fluorine-nitrogen mixed gas can be directly prepared.

A method for decomposing ammonia (NH3) to hydrogen (H2) and nitrogen (N2) includes contacting a H2-containing feed gas stream with a carbon material supported metal (M-C) catalyst at a temperature of about 500 °C to form a reduced M-C catalyst; contacting an NH3-containing feed gas stream with the reduced M-C catalyst at a temperature of about 200 to about 600 °C thereby converting at least a portion of the NH3 to H2 and N2, and regenerating the M-C catalyst to form a regenerated M-C catalyst, and producing a residue gas stream leaving the reactor; and separating the H2 from the residue gas stream to generate a H2-containing product gas stream. The regenerated M-C catalyst is substantially free of agglomerated particles and sintered particles.

The utility model discloses a novel nitrogen making device which comprises an air compressor, a pre-cooling unit, a purification system and a fractionating tower which are communicated in sequence, raw material air is compressed by the air compressor, cooled by the precooling unit and then enters the purification system; entering a fractionating tower; in a main heat exchanger of the fractionating tower, air exchanges heat with the refluxed oxygen-enriched gas and nitrogen, the temperature is reduced to be close to an air liquefaction point, the air enters a rectifying tower for rectification, and high-purity nitrogen is obtained at the top of the rectifying tower; one part of the high-purity nitrogen serves as product nitrogen, is reheated by the main heat exchanger, is discharged from the fractionating tower and is sent to a user; one part of the obtained liquid nitrogen is output as a product, and the other part of the obtained liquid nitrogen enters the rectifying tower again to serve as reflux liquid; one part of liquid air is throttled, enters the subcooler, is vaporized and then is converged with the expanded oxygen-enriched gas; the rectified liquid nitrogen enters a main heat exchanger through a liquid nitrogen pump to be reheated and serves as another stream of product nitrogen; the device can be used for producing nitrogen with two different pressures.

The utility model discloses a kind of nitrogen making machine noise reduction device, it is related to nitrogen making machine muffler field.The utility model includes the main body of muffler, the inside of the main body of muffler is provided with main sound attenuation pipe, auxiliary sound attenuation pipe, the inside of main sound attenuation pipe is movably installed with spiral blade, the spiral blade is adapted to main sound attenuation pipe, the outer end flange of main sound attenuation pipe is connected with exhaust pipe, the one end of spiral blade close to exhaust pipe is provided with grommet, the utility model passes through spiral blade, high-pressure gas is preferentially into main sound attenuation pipe after entering the main body of muffler, the airflow resistance and flow direction are actively regulated by the through hole on the surface of spiral blade, force airflow to disperse through hole and move along spiral path, to extend gas flow path and residence time under the same flow rate, enhance sound energy attenuation efficiency, spiral blade is fixed by exhaust pipe flange compression, ensure its position stability, avoid displacement or vibration due to airflow impact.

The application discloses a nitrogen ion static electricity removing system for food packaging bags, which comprises a cavity in a tubular shape, which is installed on a packaging machine, a support is fixed in the cavity, an ion generator is installed on the support through screws, mounting holes are arranged on the side wall of the cavity close to the ion generator, nitrogen concentration sensors are installed in the mounting holes through threads, a threaded joint is fixedly connected to the outlet of the cavity, replaceable first nozzles are installed on the threaded joint through threads, and the inlet of the cavity is connected to an external nitrogen generator through a nitrogen pipeline; the nitrogen ion static electricity removing system for food packaging bags can implement ionization operation in a pure nitrogen environment, can perform static electricity removing operation through nitrogen blowing, and can block the generation of ozone from the source; the system is provided with nitrogen concentration sensors in the cavity, can monitor the nitrogen concentration in the cavity in real time, prevents the system from being started in an oxygen-containing environment, and guarantees the quality of products.

The application belongs to the technical field of catalysts, and particularly relates to a structural formula catalyst and application thereof. The structural formula catalyst comprises a catalyst active component, a high-wetting anti-corrosion polymer layer and a corrugated partition layer. The catalyst active component is loaded in fibers on the surface of the polymer layer by means of impregnation coating. Based on the wetting property of the polymer layer, a flowing liquid film is formed on the surface of the polymer layer. The thickness of the liquid film is adjusted by adjusting the wetting property of the polymer layer, so as to control the catalytic reduction reaction process and improve the selectivity of the reaction. The polymer layer and the corrugated partition layer are arranged at intervals, and a polymer layer coated with the catalyst active component is arranged on each side of the corrugated partition layer. The structural formula catalyst provided by the application utilizes the wetting principle to control the entire catalytic reaction process from multiple angles, so as to improve the selectivity of the catalytic reaction.

The invention relates to a method for decontaminating a preform (14) made of thermoplastic material by exposing at least one part of the preform (14) to reactive species (RS) obtained by mixing a precursor agent (AP) with a plasma (P), the plasma (P) being generated by injecting a carrier gas (G) into a reactor (40), characterized in that the mixing of the precursor agent (AP) and the plasma (P) is carried out exclusively outside of the reactor (40) before coming in contact with the preform (14). The invention also relates to a decontamination device (50) for implementing the method.

The application discloses a rare earth zirconate supported transition metal catalyst and a preparation method and application thereof. The catalyst is composed of a carrier and a transition metal element active component supported on the carrier; the carrier is at least one selected from cerium zirconate, lanthanum zirconate, praseodymium zirconate, neodymium zirconate, samarium zirconate, europium zirconate, gadolinium zirconate, erbium zirconate and yttrium zirconate; the transition metal element active component is at least one selected from iron element, cobalt element and nickel element; the mass of the transition metal element active component is 0.1-100% of the mass of the carrier, and the mass is calculated according to the mass of the transition metal element.

The disclosure relates to a reaction system and / or a corresponding method. The system (11) comprises at least a primary chamber (12, 31), connected or connectable to an air supply (1) supplying air as reaction gas; and a metal or metalloid supply (16) supplying reaction material in the form of at least one material of a group comprising metal or metalloid. The primary chamber (12, 31) contains a reaction process therein, such as a combustion process, and comprises an exhaust (41) to output burnt or oxidized metal or metalloid oxides. A further exhaust (42) is configured to be connected to a conduit (5) configured to supply residual Nitrogen to a subsequent nitrogen based process. The subsequent Nitrogen based process can comprise storing residual Nitrogen in a storage (23) and / or is defined in or by a second chamber (13, 31) to which the conduit (5) is connectable for Nitrogen supply (6).

The invention provides a waste photovoltaic laminated part pyrolysis and decarburization integrated furnace and an atmosphere partition device thereof, the atmosphere partition device comprises a nitrogen generation system, an atmosphere replacement chamber, a middle cavity and an air curtain flashboard, the atmosphere replacement chamber is respectively connected to a feed port of a pyrolysis cavity and a discharge port of a decarburization cavity, and the atmosphere replacement chamber is connected with the nitrogen generation system. The middle cavity is connected between the pyrolysis cavity and the decarbonization cavity, and the height of the middle cavity is smaller than the height of the pyrolysis cavity and the height of the decarbonization cavity. The air curtain flashboards are respectively connected to the feed port and the discharge port of the atmosphere replacement chamber and the middle cavity, the air curtain flashboards are connected with a nitrogen generation system, and the internal air pressure of the pyrolysis cavity is greater than that of other cavities. The atmosphere in the pyrolysis cavity can be isolated from the outside, external air is prevented from entering the pyrolysis cavity to affect the pyrolysis process, and oxygen and open fire in the decarburization cavity can be prevented from flowing to the pyrolysis cavity in series. By adopting the device, the nitrogen of the nitrogen-making system can be supplied intermittently, so that nitrogen resources can be saved, and the energy consumption of the nitrogen-making system can be reduced.

The present application relates to the field of carbon materials, in particular to a modified high boron and nitrogen phenolic resin-based material, a preparation method and application thereof. The preparation method is to prepare the modified high boron and nitrogen phenolic resin-based material by co-condensation reaction of a modifier, 3-hydroxyphenylboronic acid and formaldehyde and carbonization. The modifier is selected from one of melamine, melamine OAT waste residue and urea. The present application introduces nitrogen-containing groups into the molecular chain segments of phenolic resin to prepare carbon materials with high boron and nitrogen content and high specific surface area. The preparation method is simple and easy to operate, and the carbon material product shows good electrochemical performance. The modified high boron and nitrogen phenolic resin-based material prepared by the present application can be applied to the field of electrode materials or catalytic materials.

A method of operating a turbomachine includes directing a flow of ammonia vapor to one or more hot gas path components of the turbomachine. As a result, heat is transferred to the ammonia vapor from the one or more hot gas path components. The method also includes cracking the ammonia vapor by the heat from the one or more hot gas path components, which causes a hydrogen gas and a nitrogen gas to be produced. The method further includes flowing the hydrogen gas produced by cracking the ammonia vapor to a combustor of the turbomachine. The invention also includes a turbomachine.

The invention relates to the technical field of manganese slag treatment and recovery, in particular to a nitrogen and sulfur recovery device for manganese slag treatment, which comprises a main body cylinder, an oscillation reaction mechanism is arranged in the main body cylinder, and the oscillation reaction mechanism comprises a first placing groove formed in the upper end of the main body cylinder; a first cavity communicated with the first containing groove is formed in the main body cylinder, a third cavity communicated with the first cavity is formed in the main body cylinder, a first motor is fixedly connected to the position, in the third cavity, of the main body cylinder, a fixing pipe is fixedly connected to the transmission shaft end of the first motor, and the upper end of the fixing pipe is of an opening structure; a gas conveying pipe is arranged at the upper end of the fixed pipe, and a chlorine escape prevention mechanism is arranged at the upper end of the main body cylinder; and the chlorine solution flows into the second fixing body again through a plurality of first through holes under the action of gravity, so that moisture can be recycled while chlorine is prevented from escaping to harm air, and the cost is reduced while the safety of the device is improved.

A comprehensive utilization method of secondary aluminum ash solid waste comprises the following steps: preparing secondary aluminum ash and sodium hydroxide according to a proper ratio, adding a proper amount of water, and carrying out heating and stirring reaction to generate a gas product and solid slurry; carrying out a deamination reaction on the gas product through a deamination solution, and collecting gas obtained after the gas product is subjected to the deamination reaction; filtering the deamination solution after the deamination reaction to obtain a crude ammonium salt solution and a first crude aluminum hydroxide product, evaporating and crystallizing the crude ammonium salt solution to obtain crude ammonium salt, and collecting the first crude aluminum hydroxide product; carrying out secondary heating and stirring reaction on the solid slurry and sodium hydroxide in a proper proportion; filtering the reacted solid slurry to obtain filtrate and ash, and carrying out neutralization reaction on the filtrate and a neutralization solution in a certain proportion to obtain neutralized slurry; filtering and neutralizing the slurry to obtain a sodium fortune salt solution and a second crude aluminum hydroxide product, performing evaporative crystallization on the sodium fortune salt solution to obtain sodium fortune salt, and collecting the second crude aluminum hydroxide product; stirring and mixing sodium formate and ash according to a certain ratio; according to the technology, waste residues, waste water and waste gas can be recycled, the problem of'three wastes' pollution is solved, and meanwhile efficient utilization of secondary aluminum ash is achieved.

The patent details a novel method and apparatus for integrating solar nitrogen fixation into container farming systems. The core innovation revolves around a copper mesh electrode powered by solar energy to fix nitrogen directly from the atmosphere into forms usable by crops, such as ammonia. The system can operate independently from traditional nitrogen fertilizers and is designed to be modular and scalable for decentralized farming operations, particularly in urban or off-grid environments. The solar-powered nitrogen fixation process is efficient, utilizing low-voltage systems that eliminate the need for complex circuitry, enabling cost-effective, sustainable crop production. The nitrogen can be applied either via gaseous foliar feeding or through irrigation water, providing a continuous nitrogen source. This technology is especially beneficial for crops with high nitrogen demands, like leafy greens and herbs, offering an environmentally friendly and economically viable alternative to conventional nitrogen fertilization methods.

The utility model relates to the technical field of nitrogen preparation, and discloses a cracking device for a nitrogen generator, which comprises a bottom plate, the front end of the middle of the top of the bottom plate is fixedly connected with a filter barrel, the top of the filter barrel is provided with a barrel cover, and the top of the barrel cover is fixedly connected with a brake motor. The output end of the brake motor is fixedly connected with a rotating rod, the outer ring of the rotating rod is fixedly connected with uniformly distributed scrapers, the two sides of the top of the inner wall of the filter barrel are fixedly connected with second sliding grooves, the inner walls of the second sliding grooves are slidably connected with clamping plates, and a filter screen is fixedly connected between the clamping plates. According to the utility model, air is fed into the filter screen in the filter barrel through the air pump and the fifth pipeline, then dust and chippings in the air are filtered by the filter screen, and the brake motor drives the rotating rod and the scraper blade to rotate, so that the dust and the chippings adhered to the inner wall of the filter screen can be scraped off, and the filtering effect of the filter screen is ensured.

To provide an improved system and method for supplying alternative fuel to a turbomachine while cooling the turbomachine.SOLUTION: A method of operating a turbomachine (10) includes directing a flow of ammonia vapor to one or more hot gas path components (300) of the turbomachine (10). As a result, heat is transferred from the one or more hot gas path components (300) to the ammonia vapor. The method also includes generating hydrogen gas and nitrogen gas by decomposing the ammonia vapor with heat from the one or more hot gas path components (300). The method further includes flowing the hydrogen gas generated by the decomposition of the ammonia vapor to a combustor (24) of the turbomachine (10).SELECTED DRAWING: Figure 1

The invention relates to a treatment system and a treatment method in chlor-alkali production. The treatment system comprises an electrolysis device, an ammonia synthesis device, a gas generation device and a gas storage device, the electrolysis device is used for electrolyzing a sodium chloride solution, is respectively communicated with the ammonia synthesis device and the gas generation device, and is used for supplying electrolyzed hydrogen to the ammonia synthesis device and chlorine to the gas generation device; the ammonia synthesis device is used for synthesizing ammonia gas through the reaction of nitrogen and hydrogen, is communicated with the gas generation device and is used for supplying ammonia gas to the gas generation device, and the gas generation device is used for synthesizing ammonium chloride and nitrogen through the reaction of ammonia gas and chlorine and supplying nitrogen to the ammonia synthesis device; the gas storage device is used for storing nitrogen, is communicated with the ammonia synthesis device and is used for supplying nitrogen to the ammonia synthesis device; or the gas storage device is used for storing the ammonia gas, is communicated with the gas generation device and is used for supplying the ammonia gas. The treatment system can absorb chlorine in chlor-alkali production, and is high in utilization rate and economic benefit.