244 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.

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 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 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.

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.

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 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 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.

The application discloses a river nitric oxide emission calculation method based on a land-river-air simulation, and belongs to the field of environmental engineering. The existing method for measuring river N2O has poor accuracy. A RF regression model is trained by using a nitrogen emission prediction set, a geographical variable prediction set and a climate variable prediction set, and a trained RF regression model is obtained. The nitrogen emission test set, the geographical variable test set and the climate variable test set are input into the trained RF regression model, and the river water concentration of each sub-basin in each region is output. The river hydrological parameters of each sub-basin in each region and the river water concentration of each sub-basin are input into an air-water interface gas exchange model, and the total river nitric oxide emission of each sub-basin in each region is obtained. The application is used for obtaining the total river nitric oxide emission.

The application discloses a preparation method of a copper-tin alloy catalyst and application of the copper-tin alloy catalyst in ammonia synthesis. A three-electrode system is adopted, a certain mass of copper salt and tin salt is dissolved in water, an acid solution with a certain concentration is added and is continuously stirred, a certain current density is applied at a cathode, and finally the electrodeposited catalyst is filtered and dried to obtain a dendritic nano Cu6Sn5 alloy catalyst. The application is used for electrocatalytic reduction of nitrogen monoxide to synthesize ammonia, the NH3 Faraday efficiency reaches more than 95% in a flow phase electrolytic cell, the highest current density reaches 1 A cm ‑2 , and the ammonia production rate is about 8 mmol cm ‑2 h ‑1 ; in a membrane electrode electrolyzer, the highest current density reaches 4 A cm ‑2 , and the ammonia production rate is 24.4 mmol cm ‑2 h ‑1 .

The present invention relates to nitric oxide generating compositions, kits, and combinations for the treatment, improvement, or prevention of respiratory diseases or disorders, and to methods for treating, improving, or preventing such diseases or disorders using such compositions, kits, and combinations.

The present invention relates to a method for removing nitric oxide, nitrogen dioxide, and nitrous oxide from an exhaust gas stream obtained during nitration, the method comprising: (a) removing nitric oxide and nitrogen dioxide from the exhaust gas stream by adding an oxygen-containing gas to the exhaust gas stream to oxidize the nitric oxide in the gas stream to form nitrogen dioxide, thereby obtaining a nitric oxide-deficient gas stream; (b) washing the nitric oxide-deficient gas stream with water to obtain a nitric oxide- and nitrogen dioxide-deficient gas stream; and (c) converting the nitrous oxide in the nitric oxide- and nitrogen dioxide-deficient gas stream into nitrogen and carbon dioxide, and optionally oxygen, in the presence of a nitrous oxide reduction catalyst and in the presence of hydrogen cyanide.

A device for determining measurement values describing the function of the lungs or the respiratory system of a patient includes a mouthpiece including a tube for introducing respiratory air and for sucking in air, and a gas measurement space. At least one of the following gas sensors is arranged in the gas measurement space: nitrogen monoxide sensor, carbon dioxide sensor, oxygen sensor, carbon monoxide sensor, multi-gas sensor, sensor for volatile organic compounds, alkane sensor, infrared sensor, fiber optic sensor, resistance sensor, and semiconductor sensor. The gas measurement chamber is separated by a closable opening into a first gas measurement chamber and a second gas measurement chamber, the second gas measurement chamber being closed or closable. The closable opening opens a flow path from the first gas measurement chamber into the second gas measurement chamber. A gas sensor is arranged in the second gas measurement chamber.

Provided are wound dressings for treating wounds, which include a nitric oxide generating layer for generating nitric oxide by acidification of nitrite, wherein the nitric oxide generating layer includes a solid powder nitrite component and a solid proton source component, as well as methods and uses of such wound dressings for treating wounds.

Disclosed are a 14-chloro-β-elemene nitric oxide donor derivative and a preparation method and use thereof in the preparation of anti-tumor drugs. The 14-chloro-β-elemene nitric oxide donor derivative has a general formula shown in formula (I): in formula (I): R1 represents a linear or cyclic alcohol amine structure containing nitrogen and oxygen atoms; and each of R2 and R3 is independently selected from the group consisting of C1-10 alkyl, C3-12 cycloalkyl, C6-12 aryl, 5- to 10-membered cyclic heteroaryl, C2-10 alkenyl, C2-10 alkynyl, and C2-10 alkoxy.

The invention provides a preparation method and application of a mullite catalyst. The mullite catalyst contains SmMn2O5, the mullite catalyst has a porous structure, and the porous structure is obtained by removing silicon oxide in the mullite catalyst and / or on the surface of the mullite catalyst. The mullite catalyst has a high specific surface area, exposes abundant active sites, has excellent catalytic activity and stability in diesel vehicle tail gas purification, can efficiently and synergistically remove hydrocarbon, nitric oxide and carbon monoxide, has excellent catalytic activity in multi-pollutant synergistic removal, and can be applied to the field of diesel vehicle tail gas purification. The catalyst can be effectively applied to diesel vehicle tail gas purification.

A gas delivery device includes a nitric oxide generating system. The system has a medium including a nitrite ion source. The working electrode is in contact with the medium. The Cu (II)-ligand complex is in contact with the working electrode. The reference / counter electrode, or the reference electrode and the counter electrode, is in contact with the medium and separated from the working electrode. An inlet conduit is used to deliver nitrogen to the medium and an outlet conduit is used to deliver nitrogen and a nitric oxide stream from the medium. An inspiratory gas conduit is operatively connected to the outlet conduit to introduce the oxygen-containing gas and form an output gas flow of the gas delivery device.