35 results about "Nitrous oxide gas" patented technology

The invention belongs to the field of engine aftertreatment systems, and provides a composite two-stage SCR system, a control method, an aftertreatment system.The system comprises a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit; and the control unit is used for determining a urea injection control strategy of the first SCR and the second SCR and a working strategy of the electric heating device according to the nitrogen oxide concentration and the nitrogen dioxide proportion detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and respectively controlling the first SCR, the second SCR and the electric heating device to work according to the determined strategies. According to the invention, the cooperative control requirement of ultralow nitrogen oxide emission and nitrous oxide gas emission limitation of the diesel engine can be met.

The present invention relates to a method for treating landfill leachate. The steps include: mixing nitrogen-containing landfill leachate and activated sludge and then introducing the mixture into a denitrification tank. Under the condition of inhibiting nitrous oxide reduction, nitrite in the mixture generates nitrous oxide gas dissolved in the sewage under the action of denitrifying bacteria in the denitrification tank; then introducing it into an ammonification tank for gas-liquid separation to collect nitrous oxide gas; and obtaining the sewage after ammonification treatment under the ammonification action of ammonifying functional bacteria in the ammonification tank; further introducing it into a nitrification tank to obtain sewage containing nitrite under the action of nitrosifying bacteria; refluxing to the denitrification tank for cyclic reaction; and then introducing it into a separator for separation to obtain an effluent that can be discharged and sewage that needs to be recycled for treatment. The present invention also relates to a treatment system capable of cooperating with the above treatment method. It changes the existing treatment process of directly discharging nitrogen into the air, turns to collecting nitrous oxide gas, shortens the treatment time, reduces greenhouse gas emissions, and realizes energy recovery.

The application relates to the technical field of soil gas collection, and particularly discloses an in-situ soil profile gas collection device which comprises an inner pipe, a pipe body and a strip-shaped belt. The pipe body comprises an exposed end and an inserted end, the inner pipe is located in the inner cavity of the pipe body, one end of the inner pipe is detachably connected with the inner wall of the pipe body close to the inserted end, the inner wall of the inner pipe is connected with one end of a supporting rod, the outer circumferential side of the strip-shaped belt is equidistantly provided with not less than three elastic rings, the inner diameter of the strip-shaped belt is larger than the outer diameter of the inner pipe, the strip-shaped belt is sleeved on the inner pipe, each elastic ring is clamped on the outer circumferential side of the inner pipe, and the pipe body is provided with a pulling assembly for driving one end of the strip-shaped belt to move. The technical scheme of the example of the application realizes in-situ collection of soil profile nitrous oxide gas, is suitable for long-time measurement of nitrous oxide, and has smaller interference with the surface microclimate.

The invention discloses a novel method for manufacturing p-type poly, which comprises the following steps of: providing a substrate, putting the substrate into a reaction cavity, and introducing 30000-40000 sccm of oxygen at the temperature of 500-700 DEG C or introducing 5000-20000 sccm of nitrous oxide gas at the temperature of 200-700 DEG C, so that a tunneling oxide layer Tunnel SiOx with the thickness of 0.1-2 nm grows on the back surface of a battery piece; the preparation method comprises the following steps of: adding nitrogen oxide or nitrous oxide into a substrate, removing oxygen or nitrous oxide at the temperature of between 200 and 700 DEG C, and introducing mixed gas of 3000 to 4000sccm of silane, 100 to 1000sccm of borane and 2000 to 20000sccm of hydrogen, so that a bottom layer Poly with the thickness of between 5 and 100nm grows on the substrate; the preparation method comprises the following steps of: removing mixed gas of silane, borane and hydrogen at the temperature of between 200 and 700 DEG C, introducing oxygen at the temperature of between 30000 and 40000 sccm or nitrous oxide gas at the temperature of between 5000 and 20000 sccm, and generating a silicon oxide (SiOx) multifunctional laminated layer with a certain thickness of between 0.5 and 30 nanometers. According to the method, the original p-type Poly layer is initially prepared in a PECVD mode, and then auxiliary doping is carried out through laser and annealing processes so as to accurately control the effective doping concentration of boron atoms.

A gas decomposition catalyst, a method for decomposing nitrous oxide gas by using the gas decomposition catalyst, and a cleaner system for decomposing nitrous oxide gas by using the gas decomposition catalyst. The gas decomposition catalyst includes a perovskite oxide host material containing a B'element and represented by Formula 1, and at least one B 'element protruding particle derived from some or all of the B' element, wherein the B'element protruding particles have a shape in which a portion of the particles is fixed inside the perovskite oxide host material and another portion of the particles protrudes from a surface of the perovskite oxide host material, where A, B, B ', x, and y in Formula 1 are as described in the detailed description. .

The invention belongs to the technical field of nitrous oxide preparation equipment, and particularly relates to an efficient heat exchange device for nitrous oxide preparation and a method thereof.The efficient heat exchange device comprises a snakelike bent pipe arranged on a fin heat exchanger body, a discharging end is arranged at one end of the snakelike bent pipe, and the other end of the snakelike bent pipe is fixedly communicated with a first Y-shaped pipe; the two ends of the first Y-shaped pipe are fixedly communicated with second Y-shaped pipes through straight pipes. According to the invention, through the innovative locking trigger sealing assembly, after the filter screen cylinder is oppositely inserted into the packaging cylinder, the pre-positioned filter screen cylinder can be further locked, and further sealing between the sealing plug and the inlet at the bottom end of the packaging cylinder is synchronously realized at the locked rear section, so that the air tightness of the system is ensured, and the leakage of nitrous oxide gas is prevented; the pre-positioning ensures that the filter screen cylinder is not easy to fall off in the process of being fed into the packaging cylinder, and meanwhile, the filter screen cylinder is further locked after being fed into the packaging cylinder.

The present invention aims to provide a low-cost NDIR greenhouse gas monitoring device that combines a rotary multi-gas cell system and an NDIR sensor system for measuring nitrous oxide (N2O) gas at multiple locations in a short time. [Solution] The NDIR greenhouse gas monitoring device is characterized by comprising a rotary multiple gas cell system having two or more gas cells, gas cell holders that fix both ends of each gas cell, a central axis that serves as the axis of rotation of the gas cell holder, and a motor connected to the central axis that rotates the gas cell holder by rotating the central axis, and an NDIR sensor system having an NDIR light source unit, an NDIR detector unit, and a controller that controls the output of the motor that rotates the central axis in the rotary multiple gas cell system.

The present invention relates to the field of wide-range ramjet engines, addressing the technical issues of difficult ignition and flame stabilization in a supersonic combustion chamber caused by cold-start fuel, as well as the difficulty in organizing combustion over a wide Mach number. The invention particularly relates to a nitrous oxide-based atomized injection cavity device and a method for atomizing and mixing flames. The device comprises an injection cavity integrated module disposed on a supersonic combustion chamber, and an atomizing kerosene nozzle orifice with an outlet located on a surface of the injection cavity integrated module. A cavity is disposed downstream of the atomizing kerosene nozzle orifice. High-temperature nitrous oxide gas and kerosene are mixed in the injection cavity integrated module to form kerosene atomized with the high-temperature nitrous oxide gas, which is then injected laterally upstream of the cavity through the atomizing kerosene nozzle orifice. The present invention can improve the ignition performance of liquid kerosene, while also reducing the atomized particle size and increasing the jet penetration depth, thereby enhancing the gas mixing efficiency and broadening the range of liquid kerosene supersonic combustion flame stabilization.

The utility model discloses a trace methane and nitrous oxide isotope component separation, conversion and enrichment device, and belongs to the technical field of isotope analysis and test. Comprising a methane sample tube, a nitrous oxide sample tube, a helium bottle, a first Nafion trap, a VOC adsorption trap, a combustion tube, a four-way valve, an eight-way valve, a carbon dioxide removal assembly, a first enrichment cold trap, a second enrichment cold trap and a chromatographic column, the helium tank is communicated with the gas inlet ends of the methane sample tube and the nitrous oxide sample tube, the gas outlet end of the methane sample tube is communicated with the first Nafion trap and the VOC adsorption trap, the VOC adsorption trap is communicated with the carbon dioxide removal assembly through a four-way valve, the carbon dioxide removal assembly is communicated with a combustion tube, the combustion tube is communicated with the first enrichment cold trap through an eight-way valve, and the combustion tube is communicated with the second enrichment cold trap through an eight-way valve. The first enrichment cold trap is communicated with a second enrichment cold trap through an eight-way valve, and the second enrichment cold trap is communicated with the chromatographic column. According to the utility model, methane or nitrous oxide gas in the air can be separated, converted and enriched, so that methane or nitrous oxide in the air can be measured by instruments such as a mass spectrometer and the like.

Provided are a display apparatus, which may be easily separated from a carrier substrate, and a method of manufacturing the same. The method of manufacturing a display apparatus includes: forming, on a carrier substrate, a first inorganic layer including silicon oxide; plasma-treating the first inorganic layer by using nitrous oxide gas; after the plasma-treating, forming a display substrate on the first inorganic layer; forming a display element layer above the display substrate; and separating the display substrate from the carrier substrate.

The invention discloses a method for forming an oxide-nitride-oxide (ONO) dielectric layer in a flash memory, and aims at solving the problem of Flash reading interference. The method comprises the following steps: providing a substrate, and forming a first oxide layer on the substrate (preferably on a preformed floating gate); forming a silicon oxynitride (SiON) layer on the first oxide layer, wherein the forming process comprises introducing mixed gas containing dichlorosilane gas, ammonia gas and nitrous oxide gas into the reaction chamber for chemical vapor deposition; and forming a second oxide layer on the silicon oxynitride layer, and subsequently forming a control gate. By introducing nitrous oxide gas to form the SiON layer to replace a traditional silicon nitride layer, the number of traps in the dielectric layer is effectively reduced, and the electrical insulation performance is enhanced, so that the loss of floating gate electrons during reading operation is remarkably inhibited, the reading interference characteristic is improved, and the reliability of the flash memory is improved.

The application provides a water resource recycling device and method. The water resource recycling device comprises a heat preservation water tank, an evaporation water tank and a nitrous oxide gas inlet pipe. Hot water (sewage) stored in the heat preservation water tank is sprayed into the evaporation water tank through an atomizing nozzle, and nitrous oxide is introduced into the evaporation water tank at the same time. Nitrous oxide is injected into water, and the high water solubility and heat effect of nitrous oxide accelerate the evaporation of water. The evaporated water is condensed to obtain pure water, so that the recycling and utilization of sewage can be realized. The water is sprayed by the atomizing nozzle and contacted with nitrous oxide, so that the gas-liquid contact area is greatly increased and the evaporation efficiency is improved. The application uses a solar heater to heat the sewage to be recycled, which not only reduces energy consumption, but also achieves the goal of green environmental protection. The application further comprises a cyclone separator. The cyclone separator effectively separates water vapor and nitrous oxide, so that the water recycling efficiency and purity are ensured.

The invention belongs to the technical field of environmental engineering, and particularly discloses a method for regulating and controlling carboxyl functional groups on the surface of a carbon material based on ionization irradiation. The method comprises the following steps: firstly, adding a carbon material into a sodium hydroxide solution for reflux treatment, washing the treated carbon material with deionized water, adding the washed carbon material into a centrifugal tube containing deionized water, and then introducing carbon dioxide or nitrous oxide gas. And carrying out irradiation treatment on the centrifugal tube containing the carbon material, and carrying out vacuum filtration and drying on the treated carbon material solution to obtain the carbon material rich in carboxyl functional groups. The method disclosed by the invention has the advantages of simplicity in operation, controllable carboxyl functional group content, easiness in amplified application and the like, can be used for carrying out modification treatment on a carbon material, and has an application prospect in the aspect of carbon-based material modification.

A gas decomposition catalyst, a method of decomposing nitrous oxide gas by using the gas decomposition catalyst, and a scrubber system for decomposing nitrous oxide gas by using the gas decomposition catalyst. The gas decomposition catalyst includes a perovskite oxide host material containing a B′ element and represented by Formula 1, and at least one B′ element protruding particle derived from some or all of the B′ element, where the B′ element protruding particle has a shape in which a portion of the particle is fixed inside the perovskite oxide host material and another portion of the particle protrudes from the surface of the perovskite oxide host material:where A, B, B′, x and y in Formula 1 are as described in the detailed description.

The utility model relates to an RFID (Radio Frequency Identification Device) tag for traceability management of food-grade nitrous oxide gas and a container thereof, which can be selectively applied to the fields of logistics, inventory management or asset tracking and the like, and the tail of the RFID tag is attached to the surface of an article for automatically identifying and tracking the article. The design scheme of the antenna at least has the following advantages: 1, a closed-loop design is beneficial to providing a uniform radiation mode and a relatively good reading range, the size of the antenna can be reduced, and relatively high efficiency can be kept at the same time; 2, the RFID tag is arrow-shaped, so that the identification rate and directivity of the tag can be improved, and the overall design is beneficial to optimizing the radiation direction of the antenna, so that the antenna has better reading performance in a specific direction; and 3, the top part of the arrow tip is sunken to be connected with the RFID chip, so that good electrical connection between the chip and the antenna can be ensured, and meanwhile, the chip can be protected from physical damage. The arrow tail is used for being attached to the container, and the arrow tip part can float out of the container in the use process of the tag, so that the influence of the environment on the antenna performance is minimized.

The utility model relates to a nitrous oxide filling system. The nitrous oxide filling system comprises a storage tank, a liquid pump, an analysis pipeline, a nitrous oxide gas pipeline, a vacuum pipeline, a recovery pipeline, a nitrous oxide liquid pipeline and a filling panel, and the filling panel is used for filling a tank car or a steel cylinder. A nitrous oxide gas pipeline, a recovery pipeline, a vacuum pipeline, a nitrous oxide liquid pipeline and an analysis pipeline are arranged on the filling panel. According to the nitrous oxide filling system, purging, positive pressure maintaining and negative pressure maintaining in the nitrous oxide filling process are achieved, and the nitrous oxide filling purity and the safety in the filling process are improved.

The utility model relates to the technical field of nitrous oxide purification devices, in particular to a medical nitrous oxide purification device which comprises a purification tank with a supporting column at the lower end, a sealing cover detachably mounted at the upper end of the purification tank, an inner container fixedly mounted in the purification tank and used for containing purification liquid, and air outlet holes symmetrically formed in one end of the inner container. A mounting frame is rotatably mounted on the outer side of the inner container, annular purification plates are mounted on the outer side of the mounting frame in a linear array mode, mounting grooves are formed in the inner wall of the purification tank in a linear array mode, cleaning assemblies are mounted in the mounting grooves, an air inlet pipe is fixedly mounted at the lower end of the purification tank, and an air outlet pipe is fixedly mounted on the outer side of the purification tank; nitrous oxide gas is automatically purified through the purification liquid and the annular purification plate, the purification effect is good, impurities attached to sieve pores of the annular purification plate can be automatically sucked, and the sieve pores are prevented from being blocked after long-time use, and the purification effect is prevented from being reduced.

The utility model belongs to the technical field of culture device, especially the nitrous oxide gas collection device with luer quick -connect acetylene quantitative and high seal culture structure, the utility model discloses an acetylene supply module, soil culture module and gas collection module, the acetylene supply module includes the acetylene -filled steel bottle, is connected with the micro pressure reducing valve on the steel bottle, and the micro pressure reducing valve is connected with the luer internal thread joint through the pipeline, and the luer internal thread joint is detachably connected with the syringe, the soil culture module includes the culture cavity, and the culture cavity is equipped with the soil, and is connected with the double -way stop valve on the culture cavity, and the double -way stop valve is connected with silica gel gas injection pipe, and the silica gel gas injection pipe is inserted into the culture cavity, and the other end of double -way stop valve is connected with the luer external thread joint for detachably connecting the syringe, the utility model provides a nitrous oxide gas collection device with luer quick -connect acetylene quantitative and high seal culture structure.

In some aspects, an oxidizer tank having an inner volume, the inner volume of the tank having an ullage portion and volume portion containing liquid nitrous oxide. A helium injection line may extend from an entry point of the oxidizer tank to a distal end at a location within the oxidizer portion of the tank. The apparatus may include a diffuser affixed to the distal end of the helium injection line, the diffuser having a plurality of apertures. In addition, when helium gas is supplied to the oxidizer tank via the helium injection line, the helium is injected into the liquid nitrous oxide through the diffuser, causing evaporation of a portion of the liquid nitrous oxide thereby forming nitrous oxide gas. The injected helium and the nitrous oxide gas rise to the surface of the liquid nitrous oxide into the ullage increasing pressure in the ullage.

The invention provides a manufacturing method of a semiconductor device capable of reducing gate leakage. This method for manufacturing a semiconductor device comprises: a step for forming a dielectric oxide film having a higher relative permittivity than that of silica on a nitride semiconductor layer; forming a dielectric nitrogen oxide film by nitriding the dielectric oxide film; and forming a gate electrode on the dielectric nitrogen oxide film. The step of forming the dielectric nitrogen oxide film includes: disposing a substrate including the nitride semiconductor layer and the dielectric oxide film in a reaction furnace having a catalyst metal therein; pyrolyzing ammonia gas in the reaction furnace, and generating nitrous oxide gas from nitrogen atoms contained in the ammonia gas and oxygen atoms diffused from the dielectric oxide film; and pyrolyzing the nitrous oxide gas to generate nitric oxide gas.

The invention belongs to the technical field of heat exchange devices, and particularly relates to a nitrous oxide gas purification heat exchange device which comprises a shell, a heat transfer pipe fixedly connected to the interior of the shell, a heat conduction mechanism fixedly connected to the outer surface of the heat transfer pipe, a cleaning mechanism fixedly connected to one end of the shell, and a support fixedly connected to the outer surface of the shell. One side of the support is fixedly connected with a water cooling circulation mechanism; by means of the heat conduction mechanism matched with the structure, when the heat exchange device is used, the heat transfer efficiency in the heat exchange device can be improved through the heat conduction mechanism, waste heat can be recycled and utilized more effectively, and the energy recovery rate and the heat efficiency of the whole system are improved; the efficient heat exchange device can better recover waste heat generated in the industrial process, the heat is reused, the energy utilization rate is increased, energy waste is reduced, due to the fact that energy consumption is reduced, emission of related greenhouse gases is reduced, environmental pollution can be relieved, and sustainable development is promoted.

Gas decomposition catalysts and methods and purifier systems for decomposing nitrous oxide (N₂O) gas using them. The gas decomposition catalyst comprises: a perovskite-based oxide host material represented by Formula 1, wherein distinct B' and B'' elements are each doped into B sites; and one or more B' element protrusions originating from a portion or all of the B' element on the surface of the perovskite-based oxide host material, wherein the one or more B' element protrusions have a shape in which a portion of one particle is fixed within the perovskite-based oxide host material and another portion of the particle protrudes from the surface of the perovskite-based oxide host material. In Formula 1, A, B, B', B'', x, y, and z are as described herein.

The utility model discloses a nitrous oxide gas multi-section type condensing device which comprises a first condensing tank, a gas inlet pipe is fixedly connected to the top of the first condensing tank, a supporting assembly is fixedly connected to the side wall of the first condensing tank, and a second condensing pipe tank is fixedly connected to the inner side wall of the supporting assembly. Spiral heat exchangers are installed in the middle of the first condensation tank and the middle of the second condensation pipe tank, a circulating water assembly is fixedly connected to the side wall of the first condensation tank, and nitrous oxide gas entering the first condensation tank and the second condensation pipe tank can be subjected to segmented condensation treatment through the arrangement of the circulating water assembly and the spiral heat exchangers. Condensed gas is discharged through the gas inlet pipe, liquid is discharged through the liquid discharging pipe, the discharged liquid can be collected through the arrangement of the liquid collecting assembly, the first condensation tank and the second condensation tank can be stably supported through the arrangement of the supporting assembly, and the segmented condensation effect of the nitrous oxide gas multi-segment condensation device is enhanced.

The present invention belongs to the technical field of condensers for nitrous oxide production, and specifically is a condenser for nitrous oxide production liquefaction, comprising a bracket assembly, a water washing mechanism is installed inside the bracket assembly, an alkali washing mechanism is installed on the surface of the water washing mechanism, a re-washing mechanism is installed on the surface of the alkali washing mechanism, a filtering and condensing mechanism is installed on the surface of the re-washing mechanism, and a discharging mechanism is installed on the surface of the filtering and condensing mechanism; through the above-mentioned structural coordination, the nitrous oxide crude product gas is transported to the inside of a water washing cylinder, and the nitrous oxide crude product gas is washed twice by the arrangement of two water washing cylinders being connected, and the nitrous oxide after the two water washings is transported to the inside of a primary alkali washing cylinder through a guide pipe, and sodium hydroxide, potassium permanganate solution and drinking water are transported to the inside of a primary alkali washing cylinder and a secondary alkali washing cylinder respectively through an alkali washing pipe, and the nitrous oxide is alkali-washed twice by the arrangement of the primary alkali washing cylinder and the secondary alkali washing cylinder being connected.

Provided herein are methods for maintaining a deposition chamber by plasma heating. The plasma heating can involve heating the showerhead and the deposition chamber, in some cases, using plasma generated from the nitrous oxide gas. The plasma heating is performed between the deposition(s) while the deposition chamber is idle and does not contain a substrate.

The invention relates to the technical field of wide-range ramjet engines, solves the technical problems of difficult ignition and flame stabilization in a combustion chamber and high combustion difficulty of wide Mach number organizations caused by cold start of fuel in a supersonic combustion chamber, and particularly relates to a nitrous oxide-based gas atomization injection concave cavity device and a gas atomization injection and atomization mixing flame stabilization method. Comprising an injection concave cavity integration module arranged on the supersonic combustion chamber and a gas atomization kerosene spray hole with an outlet formed in the surface of the injection concave cavity integration module, and a concave cavity is formed in the downstream of the gas atomization kerosene spray hole. High-temperature nitrous oxide gas and kerosene are mixed in the injection concave cavity integration module to form kerosene which is inflated and atomized by the high-temperature nitrous oxide gas, and the kerosene is transversely injected at the upstream of the concave cavity through the gas atomization kerosene injection hole. The ignition performance of liquid kerosene can be improved, meanwhile, the atomization particle size can be reduced, the jet flow penetration depth can be increased, the fuel gas mixing efficiency is improved, and the supersonic combustion flame stabilizing range of the liquid kerosene is widened.

Provided are: a nitrous oxide decomposition method capable of decomposing nitrous oxide for a long period of time while maintaining the decomposition rate of nitrous oxide; and a method for producing a nitrous oxide decomposition catalyst suitable for use in the decomposition method. The present invention relates to: a method for decomposing nitrous oxide, which comprises a step for bringing a catalyst into contact with a nitrous oxide-containing gas containing nitrous oxide, water vapor, and oxygen; and a method for producing a nitrous oxide decomposition catalyst suitable for use in the method. The catalyst is a catalyst in which a first component such as a ruthenium compound and a second component such as a zirconium compound are supported on a carrier comprising titanium oxide, or a catalyst in which a first component such as a ruthenium compound is supported on a carrier comprising titanium oxide and silicon oxide.

The present invention belongs to the technical field of heat exchange devices, and specifically relates to a nitrous oxide gas purification heat exchange device, which includes a housing. Inside the housing, there is a heat transfer tube fixedly connected. On the outer surface of the heat transfer tube, there is a heat conduction mechanism fixedly connected. At one end of the housing, there is a cleaning mechanism fixedly connected. On the outer surface of the housing, there is a support fixedly connected. On one side of the support, there is a water cooling circulation mechanism fixedly connected; through the heat conduction mechanism arranged in cooperation with the above structure, when using the heat exchange device, the heat conduction mechanism can be used to improve the heat transfer efficiency in the heat exchange device. Improving the heat transfer efficiency can more effectively recover and utilize waste heat, improve the overall energy recovery rate and thermal efficiency of the system. An efficient heat exchange device can better recover the waste heat generated in the industrial process, reuse this heat, improve the energy utilization rate, reduce energy waste. Since the energy consumption is reduced, the related greenhouse gas emissions will also be reduced, which helps to alleviate environmental pollution and promote sustainable development.

The invention relates to an industrial and agricultural nitrogen cycle process optimization method, which comprises the following steps: carrying out catalytic decomposition on a nitrogen and nitrous oxide gas mixture generated by microbial denitrification, and carrying out pressure swing adsorption to obtain high-purity nitrogen; biomass is gasified and reformed to prepare synthesis gas, the synthesis gas is fed into a conversion furnace for water-gas conversion, and carbon dioxide and hydrogen in the conversion gas are separated through pressure swing adsorption to serve as a carbon source and a hydrogen source for synthesizing urea; introducing the nitrogen gas and the hydrogen gas into an ammonia synthesis device according to a hydrogen-nitrogen ratio of 2.2-2.8, and reacting under the action of a catalyst to generate ammonia gas; the NH3 and the carbon dioxide are introduced into a urea synthesis device, a urea product is obtained after separation and purification, the obtained urea product is returned for agricultural production, and an agricultural-industrial-agricultural nitrogen element circulation system is constructed; the operating voltage, current density and water consumption of the proton exchange membrane electrolysis cell are adjusted to maximize the energy utilization rate and minimize the cost and carbon emission.

A gas decomposition catalyst and a method and scrubber system for decomposing nitrous oxide gas by using the gas decomposition catalyst. The gas decomposition catalyst includes a perovskite-based oxide host material represented by Formula 1, in which a B′ element and a B″ element which are different from each other are each doped into a B site, and one or more B′ element protrusion particles derived from a portion or all of the B′ element on a surface of the perovskite-based oxide host material, where the one or more B′ element protrusion particles have a shape in which a portion of one particle is fixed inside the perovskite-based oxide host material and another portion of the one particle protrudes from the surface of the perovskite-based oxide host material:In Formula 1, A, B, B′, B″, x, y, and z are as described herein.