132 results about "Nitrous oxide" patented technology

The invention relates to the technical field of biological denitrification, in particular to a nitrogen-doped carbon dot-based microbial electronic control denitrification system and application thereof. The system comprises electron donor microorganisms, electron acceptor microorganisms and nitrogen-doped carbon dots, the nitrogen-doped carbon dots serve as electron mediators outside cells, an efficient extracellular electron transfer network is constructed, and interspecific electron transfer resistance is reduced; meanwhile, the nitrogen-doped carbon dots can regulate and control intracellular electron transport chains and the energy metabolism process, the improvement of the reducing power and the energy level is promoted, and the metabolism mode optimization is realized. By cooperatively regulating and controlling generation, transmission and utilization of electrons under an extreme electron donor limited oligotrophic condition, the system disclosed by the invention can realize efficient denitrification, avoid nitrite accumulation, remarkably inhibit generation of nitrous oxide (N2O), reduce dependence on an external organic carbon source and an electron source, and improve the denitrification efficiency. And a new technical approach is provided for improving the deep denitrification efficiency under the low-carbon condition.

Disclosed is a waste gas treatment apparatus for semiconductor and display processes, the apparatus including: a pre-treatment unit having an inlet and an outlet formed therein, and configured to spray a cleaning solution to waste gas introduced through the inlet to primarily treat in the waste gas; a reaction unit configured to simultaneously treat fluorine compounds and nitrous oxide (N2O) in waste gas discharged from the pre-treatment unit; a post-treatment unit configured to spray a cleaning solution to waste gas discharged from the reaction unit to secondarily treat in the waste gas; and a heat exchange unit installed between the pre-treatment unit and the reaction unit.

The present application relates to the field of agricultural environmental protection method, particularly to a method for reducing the pollution of vegetable field soil non-point source and N2O.The method provided by the present application fully considers the carbon and nitrogen content, C / N and cellulose content of different exogenous carbon materials, reduces the application of chemical fertilizer nitrogen under the premise of ensuring the nitrogen supply of vegetables according to the nitrate nitrogen content of vegetable field soil, increases the amount of effective state carbon and the content of holocellulose by optimizing the combination and proportion of different exogenous carbon materials, improves the nitrate nitrogen assimilation of vegetable field soil, reduces the nitrogen leaching and soil N2O emission, and realizes the coordinated reduction and regulation of the pollution of vegetable field soil non-point source and N2O.The method is clear, simple, convenient, easy to implement.

The ammonium nitrate recycling structure comprises a melting device and a reaction kettle, the melting device is connected with the reaction kettle through an ammonium nitrate delivery pump, a control valve is arranged between the ammonium nitrate delivery pump and the reaction kettle, and a cooling coil is arranged at a decomposed gas rising section in the reaction kettle. The liquid inlet end of the cooling coil pipe is connected with the melting device through an ammonium nitrate circulating pump, the liquid return end of the cooling coil pipe is connected back to the melting device, and an ammonium nitrate solution in the melting device is used as a cooling medium in the cooling coil pipe and exchanges heat with undecomposed ammonium nitrate steam rising along with nitrous oxide in the reaction kettle; the liquid drops formed after condensation return to the reaction kettle for continuous thermal decomposition, the utilization rate of ammonium nitrate is improved, meanwhile, the ammonium nitrate solution serving as a cooling medium in the cooling coil returns to the melting device after heat exchange and temperature rise, and the energy consumption of the melting device for preheating the ammonium nitrate solution is reduced.

The invention discloses preparation of a nickel and cerium doped cobalt-based catalyst and application of the nickel and cerium doped cobalt-based catalyst in catalytic decomposition of nitrous oxide. The nickel and cerium doped cobalt-based catalyst is of a Ni and Ce co-doped spinel type Co3O4 structure and has a mesoporous structure, and the molar ratio of cobalt to nickel to cerium is 1: 0.12: 0.04. The preparation method comprises the following steps: preparing a mixed solution in which the molar ratio of cobalt nitrate to nickel nitrate to cerium nitrate is 1: 0.12: 0.04 by adopting a coprecipitation method, adding sodium carbonate as a coprecipitator into the mixed solution, adjusting the pH value of the mixed solution to 9 while stirring, carrying out coprecipitation and aging, then washing and drying the precipitate, and roasting for 3 hours in an air atmosphere at 300-400 DEG C to obtain the nickel and cerium doped cobalt-based catalyst. The catalyst provided by the invention has good low-temperature nitrous oxide decomposition capability and anti-interference capability under complex working conditions.

The utility model discloses a nitrogen circulating and collecting device. Wherein the nitrous oxide monitoring chamber is hermetically mounted above the plant growth chamber; a space is defined between the nitrous oxide monitoring chamber and the plant growth chamber, a gas inlet and a gas outlet are formed in the nitrous oxide monitoring chamber, and the gas outlet is sequentially connected with a nitrous oxide sensor, a gas pump and the gas inlet through a gas pipeline to form a loop; and the lower end of the nitrous oxide monitoring chamber is integrally and fixedly connected with an annular fitting step. According to the utility model, the interference of man-made disturbance in the acquisition process can be reduced, and the accuracy and reliability of monitoring data are improved.

The invention relates to the technical field of sewage treatment, and discloses a system and a method for inhibiting nitrous oxide release in a sewage denitrification process, and the system comprises a water inlet unit, a denitrification reaction unit, a dissolved oxygen monitoring module, a central control unit, a gas collection unit and a performance evaluation module. The multi-point arrangement and encryption communication mode of the dissolved oxygen monitoring module improves the accuracy and safety of data acquisition, and the corrosion-resistant design of the gas collection unit and infrared absorption spectrometry detection ensure the reliability of gas analysis. The central control unit realizes the adaptive capability of the system through real-time monitoring and dynamic adjustment, and the performance evaluation module improves the long-term operation efficiency of the system through data analysis and optimization suggestion generation. According to the method, a dissolved oxygen dynamic balance regulation mechanism and a multi-parameter collaborative optimization strategy are introduced, and a real-time monitoring and feedback control technology is combined, so that the problem of generation of byproducts in the nitrification and denitrification process is solved, and the release amount of nitrous oxide is effectively reduced.

The invention discloses a cobalt-based catalyst for producing ammonia through catalytic oxidation of nitrous oxide and nitric oxide as well as a preparation method and application of the cobalt-based catalyst, and belongs to the technical field of catalysts and environmental pollution. The preparation method of the cobalt-based catalyst comprises the following steps: (1) mixing a cobalt source, a carbon-containing nitrogen compound, a precipitator and a solvent for reaction to obtain a precursor solution; (2) putting the precursor solution into a high-pressure reaction kettle for hydrothermal reaction to obtain a solid, namely a precursor; and (3) performing pyrolysis treatment on the precursor in an inert atmosphere to obtain the cobalt-based catalyst. The cobalt-based catalyst prepared by the invention is applied to electrocatalytic conversion from N2O to NH3 for the first time, and shows excellent catalytic activity.

The present application relates to a kind of purification method of nitric oxide gas, comprising the following steps: crude nitric oxide gas is imported into extraction column, and the extraction phase obtained after extraction is imported into resolution column for temperature resolution;Nitric oxide gas resolved is imported into ethanol absorption tower after alkali washing tower and condenser;Again imported into the adsorption tower filled with 13X molecular sieve;After adsorption, the gas is collected into product collection bottle, and the purity of more than 99.99% nitric oxide product is obtained.The present application uses ferrous sulfate solution as extractant, extracts refined nitric oxide, realizes the efficient extraction of nitric oxide by the coordination reaction of ferrous ion and nitric oxide in the purification process, then uses ethanol as absorbent, utilizes the significant difference in solubility of nitric oxide and nitrous oxide in ethanol, can selectively absorb the nitrous oxide impurity difficult to remove, finally uses 13X molecular sieve to further remove nitrous oxide, which is beneficial to reduce disproportionation reaction and improve product purity.

This invention discloses a quantitative method and system for the contribution of river nitrous oxide sources and fate processes, relating to the field of biotechnology. The method includes: collecting surface water and groundwater samples; determining the physicochemical properties of the water samples, including calculating and quantifying the water-to-groundwater exchange ratio; extracting dissolved nitrous oxide from the water samples after determining the physicochemical properties and performing isotope analysis on the nitrous oxide to generate isotope test results; conducting indoor culture experiments on the water samples after completing the isotope analysis to determine whether there are abiotic sources of nitrous oxide in the water samples, generating indoor culture results; and quantifying the contribution of river nitrous oxide sources based on the results of the water-to-groundwater exchange ratio, the isotope test results, and the indoor culture results. This invention effectively analyzes the sources and fate processes of nitrous oxide in rivers and accurately quantifies the contributions of different sources.

This application relates to the field of diesel engine exhaust gas treatment technology, and provides an aftertreatment system and a diesel engine. The aftertreatment system includes a first oxidation catalytic conversion module located downstream of the diesel engine's exhaust outlet; a particulate filter module located downstream of the first oxidation catalytic conversion module; a selective catalytic reduction module located downstream of the particulate filter module for reducing nitrogen oxides in the exhaust gas discharged from the particulate filter module; an ammonia oxidation catalytic module located downstream of the selective catalytic reduction module for oxidizing ammonia in the exhaust gas discharged from the selective catalytic reduction module; and a second oxidation catalytic conversion module located downstream of the ammonia oxidation catalytic module for decomposing nitrous oxide in the exhaust gas discharged from the ammonia oxidation catalytic module. Using this system can significantly improve exhaust gas treatment efficiency.

Use of a gas hydrate for producing a frozen food foam product, wherein the gas comprises air and / or one or more of carbon dioxide, nitrogen, nitrous oxide, argon and oxygen, preferably the gas comprises carbon dioxide and / or nitrogen.

This invention provides an apparatus and method for recovering nitrous oxide from high-ammonia-nitrogen wastewater using algae-bacteria symbiotic technology. The apparatus includes an aerobic reaction unit and an anoxic reaction unit; the first outlet of the aerobic reaction unit and the inlet of the anoxic reaction unit are connected, and a monovalent anion exchange membrane is installed at the connection point; the aerobic reaction unit is connected to a first gas collection unit via a first gas outlet, and the anoxic reaction unit is connected to a second gas collection unit via a second gas outlet, for recovering nitrous oxide generated in both the aerobic and anoxic reaction units. This invention, by inoculating the aerobic reaction unit with algae-bacteria symbiotic sludge that achieves short-cut nitrification, effectively reduces the aeration energy consumption of short-cut nitrification through microalgae photosynthesis, realizes the recovery of nitrous oxide in the aerobic reaction unit, reduces the denitrification load in the anoxic reaction unit, increases the denitrification conversion rate, and reduces operating costs, embodying a high-efficiency, low-carbon, and environmentally friendly design concept.

This invention relates to the field of biological denitrification technology, and more particularly to a microbial electron-regulated denitrification system based on nitrogen-doped carbon dots and its application. The system comprises electron-donating microorganisms, electron-accepting microorganisms, and nitrogen-doped carbon dots. The nitrogen-doped carbon dots act as extracellular electron mediators, constructing an efficient extracellular electron transport network and reducing interspecies electron transport resistance. Simultaneously, the nitrogen-doped carbon dots can regulate intracellular electron transport chains and energy metabolism processes, promoting increased reducing power and energy levels, and optimizing metabolic patterns. By synergistically regulating electron generation, transport, and utilization under oligotrophic conditions with limited electron donors, this system achieves highly efficient denitrification, avoids nitrite accumulation, and significantly inhibits nitrous oxide (N2O) generation, while reducing dependence on external organic carbon sources and electron sources. This provides a new technical approach for improving the efficiency of deep denitrification under low-carbon conditions.

Systems and methods for controlling an aftertreatment system are provided. A method includes: receiving a first input target and a first input value, the first input target and the first input value associated with a first aftertreatment system component; receiving a second input target and a second input value, the second input target and the second input value associated with a second aftertreatment system component; estimating a nitrous oxide value based on at least the first input value and the second input value; determining a first output target based on at least the first input target, the second input target and the nitrous oxide value; and controlling the aftertreatment system based on the first output target.

The utility model relates to a drying device, in particular to a drying device for preparing high-purity nitrous oxide by recovering adipic acid tail gas, which belongs to the technical field of adipic acid tail gas treatment and comprises a treatment mounting box, a liquid purification filter element is mounted at one end of the treatment mounting box, and a drying filter element is arranged on one side of the liquid purification filter element. A molecular filtering structure is designed on the other side of the drying filter element, a purification treatment filter element is clamped to one side of the molecular filtering structure, a product storage bin is designed at the other end of the treatment mounting box, and an air outlet control pump is mounted at one end of the product storage bin. The device is rapidly connected with an external structure, the use convenience of the device is improved, products pass through the device and are guided, corresponding gas is correspondingly treated and then is collected, and the classified collection efficiency of the products is improved.

Formulation and dispenser systems create dairy based toppings for beverages. The dispensers include a container, valve, and an actuator for the valve. The formulations include a liquid product and a propellant. The liquid product includes a certain percentage of milkfat provided, for example, by heavy cream, skim milk, nonfat dry milk, sweeteners, and an emulsifier. The propellant is nitrous oxide or nitrogen.

The invention provides a catalyst for removing nitrous oxide and a method for removing nitrous oxide. The catalyst comprises metal oxide powder and an iron-copper compound. The iron-copper compound is attached to the surface of the metal oxide powder. The metal oxide powder includes zinc oxide, magnesium oxide, aluminum oxide, or a combination thereof. The molar ratio of iron in the iron-copper compound to metal in the metal oxide powder is 1: 1.3-4.0.

The application discloses a purification method for high-purity nitric oxide gas production, which comprises the following steps: adding sulfuric acid drops into a sodium nitrite solution to generate a nitric oxide crude product, removing nitrogen dioxide and carbon dioxide by alkali washing, removing water by pre-cooling, removing nitrogen by deep cooling, and finally obtaining high-purity nitric oxide gas. The residual concentration of nitrous oxide in the purified nitric oxide gas can be reduced to below 3 ppm, and the purity of the nitric oxide reaches above 99.99%. The method can efficiently remove the nitrous oxide impurities, has the advantages of high product yield and simple operation, and has a wide practical application prospect.

The application relates to the technical field of water quality treatment, in particular to an intelligent water quality treatment method and device. A target water quality image corresponding to a target sampling point in target water quality is acquired; the target water quality image is input into a preset water quality data determination model, and target water quality data corresponding to the target water quality is output; the target water quality image and the target water quality data are input into a preset nitrous oxide emission amount determination model, and the nitrous oxide emission amount corresponding to the target water quality is output; and based on the target water quality data and the nitrous oxide emission amount, a preset treatment measure corresponding to the target water quality is determined. The timeliness and accuracy of water quality treatment are improved.

Systems and methods for controlling an aftertreatment system are provided. A method includes: receiving a first input target and a first input value, the first input target and the first input value associated with a first aftertreatment system component; receiving a second input target and a second input value, the second input target and the second input value associated with a second aftertreatment system component; estimating a nitrous oxide value based on at least the first input value and the second input value; determining a first output target based on at least the first input target, the second input target and the nitrous oxide value; and controlling the aftertreatment system based on the first output target.

Methods and systems for controlling nitrous oxide production in a wastewater treatment facility in which wastewater is treated with microbes in a biological reactor. Nitrous oxide production can be controlled by determining an amount of two or more nutrients in the biological reactor, calculating a value that represents a comparison of the determined values, comparing the calculated value to a threshold value, and optionally taking a corrective action to reduce nitrous oxide production based on the comparison to the threshold value. In one aspect, nitrous oxide production can be controlled by determining an amount of ammonium in the biological reactor, determining an amount of a nitrogen compound that can include nitrite, nitrate, and / or hydroxylamine, calculating a value that compares the amount of ammonium to the amount of the nitrogen compound, and taking a corrective action that changes a system parameter to reduce the nitrous oxide production if the calculated value surpasses a threshold limit. In another aspect, the amount of total organic carbon (TOC) and / chemical oxygen demand (COD) in the biological reactor can also be determined, and values comparing the amount of the TOC and / or COD components to the amount of a nitrogen compound in the biological reactor can be calculated, and corrective action can likewise be taken dependent on these values.

The application discloses a short-range denitrification process nitrous oxide kinetics modeling and verification method, and specifically comprises the following steps: simplifying the ASM3 model, retaining the core biochemical processes and components related to the growth, storage and endogenous respiration of heterotrophic bacteria; expanding the reaction mechanism to construct the biochemical process involved in the short-range denitrification process to produce N2O; constructing a new way of directly using NO2- as an electron acceptor to produce N2O in the endogenous respiration stage of microorganisms; considering different electron donors and acceptors in each biochemical process, constructing a process rate equation; selecting high-quality short-range nitrification-denitrification experimental data published to test the constructed model; taking self-test data as a benchmark, iteratively fitting and calibrating key parameters, so that the model prediction value and the actual measured value are optimally fitted.

There is provided a method for producing trifluoroamine oxide. The method includes a step of preparing an intermediate product by simultaneously providing and reacting nitrogen trifluoride and nitrous oxide under the presence of a SbF5 reaction activator; and a step of producing trifluoroamine oxide by reacting the intermediate product with potassium fluoride. The step of reacting the intermediate product with potassium fluoride is performed under atmospheric pressure and room temperature.

The utility model relates to nitrous oxide purification technical field especially super pure nitrous oxide multistage catalytic purification device, including base, still including jar body and purification subassembly, the top of base is provided with purification subassembly, the utility model discloses a nitrous oxide through connecting pipe five into the feed pipe, and simultaneously starts heating device one and heats jar body in two hundred and eighty degrees, thereby making carbon monoxide catalyst catalyzing carbon monoxide and oxygen to occur oxidation reaction, generates carbon dioxide, thereby making the organic matter in nitrous oxide oxidize into water and carbon dioxide, subsequently through connecting pipe three and input nitrous oxide into condensing device, thereby making the moisture in nitrous oxide and impurity condense into water and discharge from connecting pipe one, subsequently nitrous oxide passes through connecting pipe two and enters molecular sieve filter device, thereby filtering carbon dioxide and other impurities in nitrous oxide, subsequently through connecting pipe four and discharge super pure nitrous oxide, thereby being favorable to the removal of organic impurity, thereby being favorable to the removal of carbon monoxide and other reducing gas, thereby being favorable to the purification of nitrous oxide.

A substance dispensing system including a first pressure vessel defining a first interior space; a first substance positioned in the first interior space; a first portion of a first propellant positioned in the first interior space; and a first portion of a second propellant positioned in the first interior space. At least 90 percent by weight of the first propellant is at least one of carbon dioxide, nitrous oxide, and combinations thereof. At least 90 percent by weight of the second propellant is at least one of nitrogen, argon, helium, oxygen, and combinations thereof.

This invention relates to the field of microbial technology, specifically disclosing a strain of *Alcaligenes faecalis* ALA-1 and its application in nitrous oxide emission reduction. This invention provides a strain of *Alcaligenes faecalis* (… Alcaligenes faecalis ALA-1, with accession number CGMCC No. 35322, can efficiently convert N... 2 O is restored to N 2 When applied to aerobic composting processes, it can significantly reduce nitrogen emissions during the composting process. 2 O2 emissions will promote the green and low-carbon development of the organic solid waste composting industry.

The invention discloses a transparent conductive film with a hardness gradient composite structure and a flexible electronic device, and relates to the technical field of flexible electronics. The transparent conductive thin film comprises a flexible substrate, a gradient buffer layer and a metal oxide conductive layer, and the gradient buffer layer forms a hardness gradient which is gradually increased from the flexible substrate to the metal oxide conductive layer; the gradient buffer layer takes methane, silane and nitrous oxide as gas sources and is prepared by adopting a PECVD (Plasma Enhanced Chemical Vapor Deposition) process, and in the deposition process, the flow of the methane is configured to be linearly decreased, and the flow of the silane and the nitrous oxide is configured to be linearly increased; according to the invention, the gradient buffer layer effectively obstructs water vapor and organic volatile matters released by the flexible substrate, the hardness gradient of the gradient buffer layer promotes the formation of a metal oxide highly oriented crystal structure, and the interface stress is improved; the prepared transparent conductive film has the remarkable advantages of low defect density, good conductivity, high bending resistance and good long-term stability.

The continuous feeding mechanism comprises a conveying belt, a feeding box is arranged at the end of the conveying belt, a first driving roller is rotationally connected to the interior of the feeding box, and a cutting disc is fixedly connected to the side wall of the first driving roller; a second motor is rotatably connected to the end of the first driving roller, a feeding pipe is fixedly connected to the bottom of the feeding box, a top plate is fixedly connected to the bottom of the feeding pipe, a treatment box is fixedly connected to the bottom of the top plate, a material homogenizing assembly is arranged in the treatment box, and a supporting assembly is arranged at the bottom of a connecting plate. Two feeding modes are provided by arranging the feeding box and the box top feeding opening, the flexibility and applicability of the mechanism are enhanced, bagged raw materials are cut through mutual cooperation of a cutting disc and an auxiliary disc, continuous and automatic feeding of the bagged raw materials is achieved, manpower is reduced, the production efficiency is improved, and the production cost is reduced. And the feeding rate is stabilized.