332 results about "Nitric Oxide / Nitrogen" patented technology

The utility model relates to a purification device for nitric oxide gas. The purification device comprises an extraction tower, a desorption tower, an alkaline washing tower, a condenser, an ethanol absorption tower and an adsorption tower which are communicated in sequence, a feed port of the extraction tower is communicated with a crude product gas source pipeline, a discharge port of the extraction tower is communicated with a feed port pipeline of the desorption tower, a discharge port of the desorption tower is communicated with a feed port pipeline of the alkaline washing tower, a discharge port of the alkaline washing tower is communicated with a feed port pipeline of the condenser, and a discharge port of the condenser is communicated with a feed port pipeline of the ethanol absorption tower. A discharge port of the ethanol absorption tower is communicated with a feed port of the adsorption tower through a pipeline, and a discharge port of the adsorption tower is communicated with a product collection bottle through a pipeline. Through the extraction tower, the desorption tower, the alkaline washing tower, the condenser, the ethanol absorption tower and the adsorption tower which are arranged in sequence, the device can efficiently purify nitric oxide gas, and each treatment unit can remove specific impurities, so that the finally obtained nitric oxide gas is ensured to have high purity.

The invention relates to a process for removing nitrogen monoxide, nitrogen dioxide and nitrous oxide from an exhaust gas stream obtained in a nitration process, comprising: (a) Removing nitrogen monoxide and nitrogen dioxide from the exhaust gas stream by adding an oxygen comprising gas to the exhaust gas stream, oxidizing the nitrogen monoxide in the gas stream to form nitrogen dioxide, thereby obtaining a gas stream depleted in nitrogen monoxide; (b) Washing the gas stream depleted in nitrogen monoxide with water to obtain a gas stream depleted in nitrogen monoxide and nitrogen dioxide; (c) Converting nitrous oxide in the gas stream depleted in nitrogen monoxide and nitrogen dioxide into nitrogen and carbon dioxide and optionally oxygen in the presence of a nitrous oxide reduction catalyst and in the presence of hydrogen cyanide.

Systems and methods for delivering a gas, such as nitric oxide, are provided. In some embodiments, systems and methods are provided for delivering a gas, such as nitric oxide, in the form of nanobubbles and / or a dissolved gas using a liquid medium.

The present invention discloses a method for assessing nitrogen emissions from farmland soil at a regional scale based on transfer learning, the method comprising: obtaining existing farmland soil nitrogen, nitric oxide and nitrous oxide data, and constructing an emission database; establishing a coupled domain adaptive and random forest regression model based on the data in the emission database; adjusting the parameters of the random forest model using farmland soil nitrogen emission observation data, and optimizing the random forest model; using the optimized model to perform global farmland emission prediction on farmland soil nitrogen data, and obtaining a regional scale farmland soil nitrogen emission assessment result. The present invention uses field measured data of nitrous oxide and nitric oxide, which have the same production pathway as nitrogen, to construct a random forest model, and based on transfer learning technology and ideas, uses limited nitrogen field observation data to calibrate the constructed model to meet the needs of large-scale assessment of farmland soil nitrogen emissions, thereby achieving farmland soil nitrogen emission assessment.

The invention provides a nitric oxide generating device, and relates to the technical field of medical instruments, the nitric oxide generating device comprises an air input module, a nitric oxide generating module and a harmful gas filtering module which are connected in sequence, the nitric oxide generating module comprises a high-voltage pulse arc generator and a reaction bin, and the output end of the air input module is connected with the air inlet end of the reaction bin; the two ends of the high-voltage pulse arc generator extend into the reaction bin to be connected with a negative electrode and a positive electrode, the high-voltage pulse arc generator is used for outputting voltage to electrolyze air between the negative electrode and the positive electrode so as to generate nitric oxide gas, and the gas outlet end of the reaction bin is connected with the harmful gas filtering module. The harmful gas filtering module filters harmful gas. Compared with a traditional method for storing and compressing the high-concentration nitric oxide gas based on a steel cylinder, the device generates the nitric oxide gas on site, high storage and transportation cost is avoided, and potential risks of the high-concentration nitric oxide steel cylinder in the transportation and use process are avoided.

The invention discloses a method and system for calculating the excess air coefficient of a pure hydrogen fuel internal combustion engine, and the method comprises the steps: obtaining the oxygen concentration in the intake air of the pure hydrogen fuel internal combustion engine; and the hydrogen concentration, the oxygen concentration and the nitric oxide concentration in exhaust gas of the pure hydrogen fuel internal combustion engine are obtained. And calculating the excess air coefficient of the pure hydrogen fuel internal combustion engine by solving a material balance equation set according to the oxygen concentration in the intake air and the hydrogen concentration, the oxygen concentration and the nitric oxide concentration in the exhaust. Therefore, according to the calculation method for the excess air coefficient of the pure hydrogen fuel internal combustion engine, the calculation accuracy of the excess air coefficient is improved, and therefore the combustion efficiency and the emission control effect of the hydrogen internal combustion engine are optimized.

The nitric oxide laboratory online preparation device comprises an ionization box, an adsorption regeneration tower, a compressor and a gas storage tank, a positive electrode and a negative electrode are arranged on the ionization box, and the positive electrode and the negative electrode are matched to generate electric arcs; the adsorption regeneration tower is provided with an adsorbent inlet, an adsorbent outlet, an ionized gas inlet, an exhaust port and a nitric oxide outlet, the ionized gas inlet is communicated with the ionized gas outlet, a gas inlet of the compressor is communicated with the nitric oxide outlet, and a gas outlet of the compressor is communicated with the gas storage tank; nitric oxide gas discharged from the nitric oxide outlet is compressed and then stored in the gas storage tank. According to the nitric oxide laboratory online preparation device, the device structure is greatly simplified, and operation and maintenance are convenient. By means of the mode of generating nitric oxide through the electric arc, the high-temperature and high-pressure conditions in a traditional method are avoided, energy consumption is effectively reduced, the purity of nitric oxide is improved, and the requirement of a high-precision experiment is met.

The invention relates to a glutamic acid-N-carboxyl-anhydride monomer containing an ethyl nitrate group, a polymer of the glutamic acid-N-carboxyl-anhydride monomer containing the ethyl nitrate group, and an application of the glutamic acid-N-carboxyl-anhydride monomer containing the ethyl nitrate group and the polymer of the glutamic acid-N-carboxyl-anhydride monomer containing the ethyl nitrate group as a nitric oxide donor. The polyethylene glycol block-containing copolymer can be independently polymerized or copolymerized with other amino acid-N-carboxyl-anhydride monomers to form an NO donor polymer, and the polyethylene glycol block-containing copolymer can form a nano structure through self-assembly so as to efficiently load a hydrophobic drug. The drug can be accurately delivered to tumor tissues or cardiovascular and cerebrovascular disease parts in a targeted manner, and the controllable release of NO and / or loaded drugs is realized, so that the effect of inhibiting tumors and cardiovascular and cerebrovascular diseases is achieved. Structural formula of glutamic acid-N-carboxyl-intracyclic anhydride monomer containing ethyl nitrate group is as shown in formula (I): # imgabs0 #

The invention belongs to the technical field of third-generation semiconductor material defect control. According to the method for eliminating the silicon carbide small stacking fault based on high-temperature oxidation, a silicon carbide substrate is scanned and represented in a photoluminescence mode, and the target small stacking fault is accurately recognized and positioned; cleaning the substrate to remove surface impurities, performing high-temperature oxidation treatment in a dry oxygen atmosphere, and growing an oxide layer under control; constructing a composite interface stress field at an interface by utilizing thermal expansion coefficient mismatch and reaction molar volume expansion between the oxide layer and the substrate, and driving target stacking fault atom arrangement to generate directional reconstruction, so that the target stacking fault atom arrangement is converted into a matrix standard sequence; and finally, nitric oxide auxiliary annealing is carried out, and the reconstructed lattice configuration is solidified by utilizing a nitrogen passivation effect. The method is simple in process and high in compatibility, small stacking fault can be efficiently and stably eliminated, the silicon carbide substrate crystal quality is remarkably improved, and a guarantee is provided for preparation of a high-reliability power device.

The invention provides a temperature-sensitive gel composition for slowly releasing nitric oxide as well as a preparation method and application thereof, and relates to the technical field of medical gels, the temperature-sensitive gel composition comprises the following components: a temperature-sensitive gel matrix, an NO donor composition, and an optional pH regulator and oxidant; wherein the temperature-sensitive gel matrix comprises the following components: a temperature-sensitive matrix, a phase-change temperature regulator and a solvent, after the temperature-sensitive gel preparation is used, NO gas can be slowly released, the release time can last for more than 12 hours, and the temperature-sensitive gel preparation has a remarkable curative effect in the aspect of long-acting bacteriostasis.

A topical application of nitric oxide may be provided by two separate containers, each containing an active component media to produce nitric oxide when combined. For example, a nitrite component media may be contained in one dispenser and an acidified component media may be contained in another dispenser. Each dispenser may dispense the respective component media as a foam or a solution. They can be combined to initiate the production of nitric oxide and the mixture of resultant foam is applied topically to treat various skin disorders or wounds.

To provide improved beneficial bacteria that can suppress the growth of pathogens.SOLUTION: The present disclosure provides, inter alia, an optimized strain of Nitrosomonas eutropha (N. eutropha) designated D23, D23-100, or AOB D23-100. N. eutropha bacteria disclosed in the present application have desirable properties, e.g., optimized properties, such as the ability to suppress growth of pathogenic bacteria, and an enhanced ability to produce nitric oxide and nitric oxide precursors. The N. eutropha herein may be used, for instance, to treat diseases associated with low nitrite levels, skin diseases, and diseases caused by pathogenic bacteria.SELECTED DRAWING: Figure 18

Systems and methods for nitric oxide generation are provided. In an embodiment, an NO generation system can include a controller and disposable cartridge that can provide nitric oxide to two different treatments simultaneously. The disposable cartridge has multiple purposes including preparing incoming gases for exposure to the NO generation process, scrubbing exhaust gases for unwanted materials, characterizing the patient inspiratory flow, and removing moisture from sample gases collected. Plasma generation can be done within the cartridge or within the controller. The system has the capability of calibrating NO and NO2 gas analysis sensors without the use of a calibration gas.

The present invention discloses an ammonia oxidation process and a method for recovering Rh from a gas phase comprising volatile precious metals, comprising the steps of: a) generating or providing volatile precious metals, particularly by operating a catalytic system comprising a catalyst, wherein the catalyst contains precious metals, wherein the precious metals at least comprise Rh, wherein the volatile precious metals comprise at least volatile Rh; b) contacting volatile Rh generated in step a) with a recovery system comprising a compound of formula Co3-xMxO4, where M is Fe or Al and x = 0-2; and c) forming a solid composition comprising the compound of formula Co3-xMxO4 and Rh, wherein the compound of formula Co3-xMxO4 is bonded with Rh, particularly as determined by SEM-EDS and TEM analysis. The present invention further relates to the use of the compound of formula Co3-xMxO4, where M is Fe or Al and x = 0-2, or the use of the recovery system, for recovering at least volatile Rh.

The utility model discloses a reaction device for normal-pressure leaching of nitric acid, which is characterized in that in the reaction process, nitric oxide in a reaction kettle enters an absorption tower through a nitric oxide exhaust outlet, a first pipeline and a nitric oxide gas inlet, and an oxygen supply device supplies oxygen to the absorption tower; an absorption liquid circulating pump I conveys an absorbent in the absorption tower circulating device to an absorbent circulating inlet I and enters the absorption tower, the absorbent absorbs nitric oxide gas to form nitric acid, nitric oxide released in the process reacts with oxygen to generate nitrogen dioxide, and the nitrogen dioxide reacts with the absorbent to generate nitric acid; according to the device, nitrogen oxide gas generated in the reaction process can be absorbed, the obtained absorption acid (nitric acid) can be cyclically applied to the leaching reaction, and tail gas can be discharged after reaching the standard. And the method is environment-friendly.

The invention relates to the technical field of gas purification, and discloses impurity removal equipment for removing CO2 and NO2 for nitric oxide production equipment, which comprises a purification tower, a defoaming mechanism is mounted in the purification tower and is used for defoaming nitric oxide bubbles in a solution in the purification tower; and the defoaming mechanism comprises a gas outlet distributor, a sleeve and a gas inlet pipe. Through cooperative use of the gas outlet distributor, the sleeve and the gas inlet pipe, nitric oxide initial gas is uniformly distributed and discharged into a NaOH aqueous solution in the form of relatively fine bubbles through the gas outlet distributor, so that the gas-liquid contact area, namely the reaction absorption rate, can be greatly increased, and meanwhile, the gas-liquid contact time, namely the reaction absorption time, is increased due to the slowdown of the gas flow rising speed; by greatly increasing the gas-liquid contact time and area in the purification tower, the effect of the target purification function is greatly improved, and further, the impurity removal treatment of the device on CO2 and NO2 in nitric oxide can be improved.

The present invention relates to a process for removing nitrogen oxides, nitrous oxide and carbon monoxide from a gas stream (1), comprising: (a) oxidizing nitric oxide in the gas stream to form nitrogen dioxide by adding an oxygen-containing gas (3) to the gas stream (1), thereby obtaining a nitric oxide-depleted gas stream, and washing the nitric oxide-depleted gas stream with water (7) to obtain a nitric oxide-depleted gas stream (11) to remove nitrogen oxides from the gas stream (1); (b) oxidizing at least a portion of the carbon monoxide in the nitrogen oxide-depleted gas stream (11) to form carbon dioxide, thereby obtaining a carbon monoxide-depleted gas stream (19); (c) converting nitrous oxide in the carbon monoxide-depleted gas stream (19) to nitrogen and oxygen if the carbon monoxide-depleted gas stream (19) does not contain carbon monoxide, or converting nitrous oxide in the carbon monoxide-depleted gas stream to nitrogen and oxygen and / or carbon dioxide if the carbon monoxide-depleted gas stream (19) still contains carbon monoxide, or converting nitrous oxide in the carbon monoxide-depleted gas stream (19) to nitrogen and oxygen and / or carbon dioxide if the carbon monoxide-depleted gas stream (19) still contains carbon monoxide; to obtain a purified tail gas stream (25).

The invention discloses a nitric oxide backdraft balance test device which comprises a plasma generation furnace, a cooler, a first detection device and a second detection device, the plasma generation furnace is used for heating nitrogen and oxygen to enable the nitrogen and the oxygen to generate nitric oxide at high temperature, a thermal medium inlet is communicated with a gas outlet, and a gas inlet is communicated with a gas outlet. The cooler is used for cooling gas discharged by the plasma generator; the first detection device is used for detecting the content of nitric oxide entering the plasma generation furnace, and the second detection device is used for detecting the content of cooled nitric oxide discharged by the cooler. The nitric oxide backdraft balance test device can be used for studying backdraft balance of thermal nitric oxide, technical support is provided for reducing the content of nitric oxide in flue gas of a coal-fired boiler, the boiler emission control technology can be further optimized, near-zero emission of the coal-fired boiler can be achieved, and environmental pollution can be reduced.

The invention discloses a porous crystal material for air purification and a preparation method and application thereof. The crystal material belongs to a tetragonal system, the space group is P43212, the simple formula of the chemical structure is [Ni (Htbc) (fdpy) (H2O)], the molecular formula is C54H42NiN2O7, and the cell parameter is # imgabs0 # alpha = beta = gamma = 90 degrees; the prepared crystal material has a clear space structure and an accurate molecular formula, has good adsorption performance on harmful gas micromolecules, is used as a porous crystal material for removing harmful gas pollutants such as formaldehyde, acetylene, ethylene, halogenated hydrocarbon, nitric oxide, nitrogen dioxide, ammonia or sulfide and the like for air purification, and has a wide application prospect. The technology has the advantages of simplicity in operation, low cost, stable performance, suitability for large-scale production and the like.

The invention discloses a method for circularly absorbing nitric oxide (NO) in flue gas of a rotary kiln by using a neutral potassium permanganate (KMnO4) solution, and belongs to the technical field of flue gas purification. The method comprises the following steps: introducing flue gas containing NO into a neutral KMnO4 solution added with EDTA (Ethylene Diamine Tetraacetic Acid) for absorption; after the absorption tail liquid is subjected to evaporation treatment, NO2 returns to the rotary kiln to be subjected to high-temperature reduction into a mixture of N2, MnO2 and KOH, the mixture is fused by utilizing flue gas of the rotary kiln, oxygen is introduced, the mixture is converted into K2MnO4, and K2MnO4 is dissolved and electrolyzed into KMnO4 to be recycled. The method is simple in process, low in operation cost and high in NO removal rate.

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 provides a nitric oxide generating device and a method for manufacturing the same. [Solution] In an exemplary method, a solution is introduced into the lumen of a nitric oxide permeable polymer object. The solution contains a solvent and S-nitroso-1-adamantanethol dissolved in the solvent. The solution is immersed in the lumen of the nitric oxide permeable polymer object for a maximum of 12 hours. The solution is then removed from the lumen of the nitric oxide permeable polymer object.

A nitric oxide delivery system can include a cassette which is a single use disposable component used to store liquid N2O4 activate upon operator demand, convert N2O4 to NO2 via a heating element(s) controlled by a console to deliver NO2 at a controlled flow rate, direct concentrated NO2 to a contained pair of conversion cartridges and exhaust NO gas to the console for delivery to the patient.

The invention provides a process for preparing a high-sensitivity organic field effect transistor gas sensor by using donor-receptor type molecules, and belongs to the technical field of gas sensors. According to the invention, weak interaction force is generated when the D-A type molecular layer is in contact with the gas to be detected, so that intramolecular charge transfer occurs, the dipole distance of the D-A type molecules is changed, and the current flowing through the source and drain electrodes of the organic field effect transistor is changed, so that the response speed and sensitivity of the field effect transistor are enhanced. The result of the embodiment shows that the migration rate of the organic field effect transistor gas sensor provided by the invention is 0.3-2cm < 2 > V <-1 > s <-1 >, and the detection responsivity of the organic field effect transistor gas sensor to nitric oxide with the concentration of 1ppm can reach 21%.

The present disclosure describes systems and methods for controlling the electrical generation of nitric oxide. In some aspects, a system for generating nitric oxide comprises a plasma chamber housing two or more electrodes in communication with a resonant high voltage circuit configured to send a signal to the plasma chamber for generating nitric oxide in a product gas from a flow of a reactant gas, and a controller configured to generate a pulse width modulation signal having multiple harmonic frequencies to excite the resonant high voltage circuit. The controller is configured to adjust the duty cycle of the pulse width modulation signal, the controller selecting the duty cycle based on a target voltage before plasma formation and a target current after plasma formation in the plasma chamber.

The application discloses a method for generating nitric oxide gas, and belongs to the field of gas preparation and medical treatment, and is characterized in that the method for generating nitric oxide gas is to mix liquid medicament with solid medicament, to make the liquid medicament and the solid medicament react chemically, so as to generate nitric oxide gas with a certain concentration, the effective component of the solid medicament is nitrosyl iron sulfate, and the liquid medicament is one or a mixture of several kinds of alkali solution or slurry and salt solution or slurry. The application further discloses a corresponding device for generating nitric oxide gas.

A transdermal formulation for the delivery of a nitric oxide booster or nitric oxide precursor to a subject is provided. The formulation can be applied to the treatment of various diseases or conditions by enhancing systemic level of nitric oxide.

The high-purity nitric oxide tail gas absorption device comprises a gas washing unit and a reaction unit, the gas washing unit comprises a plurality of absorption towers which are connected in series, the absorption towers comprise a water washing tower and an alkaline washing tower, liquid inlet valves are arranged on the upper sides of the water washing tower and the alkaline washing tower, and liquid discharge valves are arranged on the lower sides of the water washing tower and the alkaline washing tower. A circulating spraying system is arranged in the absorption tower; the reaction unit comprises a buffer tank I arranged on the front side of the water washing tower and a buffer tank II arranged on the front side of the alkaline washing tower; the concentration detection system comprises a detection assembly, and the detection assembly is used for detecting the pH value in the absorption tower. The device has the beneficial effects that the absorption efficiency is high, the absorption is thorough, the equipment is simple, and the operation is convenient.

Systems and methods are provided for generating a nitric oxide (NO) gas. A plasma generating device is configured to produce a plasma to ionize a flow of a reactant gas into a product gas that comprises NO, NO2, oxygen, and nitrogen gases. A controller is configured to regulate an amount of NO in the product gas using parameters as input to the controller. A gas separation device comprising a housing including product gas inlets and sweep fluid inlets to receive a flow of the product gas and a flow of the sweep fluid such that the flows of product gas and sweep fluid are opposed flows. A membrane is positioned inside the housing and permits flow of a subset of gases of the product gas therethrough so the product gas exiting the housing includes NO.