24 results about "Dinitrogen monoxide" patented technology

The invention belongs to the field of chemical engineering manufacturing industry, and relates to equipment and a method for producing cyclic ketone compounds by oxidizing cycloolefin by using waste gas produced by adipic acid. Raw material gas A containing nitrous oxide from an adipic acid production process production line can be subjected to oxygen removal, so that the oxygen content is less than 100ppm; the raw material gas A containing nitrous oxide from the adipic acid production line can also be purified into purer gas containing 50-99% of N2O, and the purer gas is used for reacting with the cycloolefin compound; the reaction equation is CnH2n-2 (cycloolefin) + N2O (nitrous oxide)-> CnH2n-2O (a product cyclic ketone compound) + a byproduct + N2 superscript (nitrogen), wherein n is a positive integer from 4 to 24. The device is stable in consumption quota, low in production cost and high in economic benefit compared with the prior art.

Embodiments herein relate to recycling of used lithium battery materials. In some aspects, a method may include suspending a lithium source in a solvent containing an oxidizing agent to extract lithium, forming an extracted lithium solution, separating the extracted lithium solution from residual solids of the lithium source, purifying the extracted lithium solution by precipitating and filtering impurities, and precipitating lithium in the purified lithium solution to produce lithium carbonate (Li2CO3). In some embodiments, the method may also include pre-treating the lithium source to improve the kinetics of the lithium extraction. In some embodiments, the pretreatment may include a cutting or comminution step to reduce the size of the lithium source. In some embodiments, the lithium source may include lithium ion battery waste. In some embodiments, the oxidizing agent may include sodium persulfate (Na2S2O8), potassium persulfate ((NH4) 2S2O8), ammonium persulfate (NH4) 2S2O8, hydrogen peroxide (H2O2), ozone (O3), and / or nitrous oxide (N2O).

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 relates to the technical field of gas impurity removal, and discloses a metal modified molecular sieve as well as a preparation method and application thereof. The method comprises the following steps: (1) mixing a metal salt, a nitrogen-containing micromolecule complexing agent, a nitrogen-containing micromolecule dispersing aid and ethanol to obtain a mixed solution, and then adding a molecular sieve for mixing to obtain a mixture; (2) drying the mixture obtained in the step (1), and then roasting; wherein the metal in the metal salt is selected from at least one of Mg, Ca, Sr and Ba; the nitrogen-containing micromolecule complexing agent is selected from at least one of 2-nitrophenol, 3-nitrophenol and 4-nitrophenol. The metal modified molecular sieve prepared by the method has very high adsorption activity on nitrous oxide, oxygen-enriched liquid air containing nitrous oxide is treated, the content of nitrous oxide can be reduced to 5 ppm or below, and the whole process is low in energy consumption, does not generate new impurities, and is green and environment-friendly.

Provided are a gas decomposition method and a gas decomposition device that are designed to efficiently decompose a greenhouse gas by a simpler way or structure. The gas decomposition method includes irradiating a gas to be treated containing oxygen, dinitrogen monoxide, and a saturated hydrocarbon with first light having a main emission wavelength in a range of 160 nm or more and less than 200 nm to decompose the dinitrogen monoxide and the saturated hydrocarbon. The gas decomposition device includes a chamber to supply a gas to be treated containing oxygen, dinitrogen monoxide, and the saturated hydrocarbon and a first light source to irradiate the chamber with the first light.

To suppress generation of harmful substances when using ammonia as fuel in a control device and method for an internal combustion engine.SOLUTION: In an internal combustion engine having a fuel supply passage for supplying ammonia as fuel to a combustion chamber and a reformer that reforms ammonia to hydrogen by using heat of exhaust gas, when a load is raised by increasing the amount of ammonia, if thermal efficiency deteriorates, ignition timing is delayed, and when a concentration of dinitrogen monoxide in exhaust gas or a correlation value correlated with the concentration of the dinitrogen monoxide in exhaust gas reaches a preset determination value, the delay of the ignition timing is finished.SELECTED DRAWING: Figure 1

[Problem] The present invention provides a dinitrogen oxide purification system, an internal combustion engine system, and a dinitrogen oxide purification method, which make it easy to obtain sufficient effects of decomposing or reducing dinitrogen oxide.[Solution] The dinitrogen oxide purification system 10 includes an intake section 14 and a purification section 1. The intake section 14 takes in dinitrogen oxide in the presence of coexisting O2 and / or H2O. The purification section 1 decomposes or reduces the dinitrogen oxide taken into the intake section 14.

To provide a gas processing system which discharges electricity according to at least one of an odor intensity of an odorous gas and a concentration of dinitrogen monoxide to enable deodorization according to change of at least one of the odor intensity and the concentration of dinitrogen monoxide.SOLUTION: A gas processing system 1 includes: a plasm processing unit 20 which discharges electricity in an odorous gas including odorous components to generate plasma in the odorous gas; an adsorption unit 30 which is provided at the downstream of the plasma processing unit 20 and adsorbs the odorous components remaining in the odorous gas which contacts with the plasma; and a control unit 43 which controls the number of times of electric discharge of the plasm processing unit 20. The control unit 43 controls the number of times of electric discharge according to an odor intensity of the odorous gas.SELECTED DRAWING: Figure 1

The invention relates to the technical field of metal recovery, and particularly discloses a method for recycling metal elements from a waste residue oil hydrogenation catalyst, which comprises the following steps: (1) crushing and roasting a waste cobalt-molybdenum-based hydrogenation catalyst to obtain a sintered material; (2) mixing the sintered material with a leaching agent, and leaching and filtering to obtain leaching residues and leaching liquid; the leaching agent is prepared from the following components: nitric acid, 1-butyl-3-methylimidazolium tetrafluoroborate and modified nano titanium dioxide; (3) adding a precipitator into the leachate to obtain cobalt hydroxide, and reducing the cobalt hydroxide to obtain a cobalt elementary substance; and (4) adding a reducing agent into the filtrate containing the molybdenum ions, and reducing to obtain the elemental molybdenum. According to the recovery method, by controlling the proper volume ratio of nitrous oxide to nitrogen, the mass ratio of the sintered material to the leaching agent and the components of the leaching agent, the recovery rate of cobalt and molybdenum metal in the waste catalyst is effectively increased.

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.

This application relates to the technical field of metal recycling, and specifically discloses a method for recycling metal elements from waste residue oil hydrogenation catalysts, which includes: (1) crushing and roasting the waste cobalt-molybdenum-based hydrogenation catalyst to obtain a sintered material; (2) mixing the sintered material with a leaching agent, and leaching and filtering to obtain a leaching residue and a leaching solution; the components of the leaching agent include nitric acid, 1-butyl-3-methylimidazolium tetrafluoroborate, and modified nano-titanium dioxide; (3) adding a precipitating agent to the leaching solution to obtain cobalt hydroxide, and reducing the cobalt hydroxide to obtain cobalt metal; (4) adding a reducing agent to the filtrate containing molybdenum ions to reduce and obtain molybdenum metal. The recycling method of this application effectively improves the recovery rate of cobalt and molybdenum metals in waste catalysts by controlling the appropriate volume ratio of dinitrogen monoxide to nitrogen, the mass ratio of the sintered material to the leaching agent, and the components of the leaching agent.

A method for manufacturing a semiconductor device includes forming, on a nitride semiconductor layer, a dielectric oxide film having a higher relative dielectric constant than silicon dioxide, forming a dielectric oxynitride film by nitriding the dielectric oxide film, and forming a gate electrode on the dielectric oxynitride film. The forming the dielectric oxynitride film includes disposing a substrate including the nitride semiconductor layer and the dielectric oxide film inside a reaction furnace including a catalyst metal therein, thermally decomposing an ammonia gas inside the reaction furnace to generate a dinitrogen monoxide gas from nitrogen atoms included in the ammonia gas and oxygen atoms diffused from the dielectric oxide film, and thermally decomposing the dinitrogen monoxide gas to generate a nitrogen monoxide gas.

The invention provides a regeneration method for a deactivated copper-bismuth catalyst. The regeneration method comprises: performing low-temperature thermal oxidation treatment on the deactivated copper-bismuth catalyst in a nitrous oxide atmosphere to obtain a catalyst after the low-temperature thermal oxidation treatment; the invention selects nitrous oxide to perform low-temperature regeneration on the deactivated copper-bismuth catalyst, and the oxidation rate of copper acetylene in the low-temperature regeneration process is relatively low, so that the problem of CuO particle agglomeration in the rapid oxidation process can be avoided; and for the deactivated copper-bismuth catalyst produced in the preparation of 1,4-butynediol by the acetylene-aldehyde process, the catalytic activity of the regenerated copper-bismuth catalyst can be improved.

In a method for producing nitric acid, nitrogen oxides are first created in an ammonia combustion plant (2) by burning ammonia with primary air and are cooled in a condenser (3), thereby producing a solution containing nitric acid. The solution containing nitric acid is then supplied to at least one absorption tower, (4, 5), in which the nitrogen oxides are brought into contact with water and oxygen, the nitrogen-containing gas mixture reacting at least partially with the water and the oxygen, forming an aqueous solution containing nitric acid, which solution collects at the bottom of the absorption tower, (4, 5) and is then compressed and supplied back to the absorption tower (4, 5) via a line (13, 15, 21). To minimise the formation of dinitrogen monoxide during ammonia oxidation in such a plant and to increase the efficiency of the process, it is proposed in accordance with the invention to use a gas, the oxygen content of which is between 21.3 vol.% and 35 vol.% as an oxidant in the ammonia combustion plant (2). According to the invention, this oxidant is produced by introducing pure oxygen or an oxygen-rich gas into the primary air or into the ammonia combustion plant (2).

The gas decomposition device includes: a pipe through which a gas to be treated containing oxygen and dinitrogen monoxide flows; a first light source that irradiates an inside of the pipe with first light having a main emission wavelength of 160 nm or more and less than 200 nm; and a second light source that irradiates the inside of the pipe with second light having a main emission wavelength of 200 nm or more and less than 411 nm, in which the first light source and the second light source are disposed such that at least a part of the second light overlaps with at least a part of the first light, and decompose the dinitrogen monoxide.

Provided is a method for decomposing a treatment target gas, the method involving decomposing dinitrogen monoxide while suppressing emission of NOx.　This method is for decomposing a treatment target gas, the method comprising decomposing dinitrogen monoxide in the treatment target gas by providing, to the treatment target gas, energy for exciting a gas contained in the treatment target gas. The treatment target gas contains at least dinitrogen monoxide and carbon dioxide. The gas concentration of the carbon dioxide contained in the treatment target gas is higher than the concentration of each gas contained in the treatment target gas excluding the carbon dioxide.

An exhaust gas treatment device for treating exhaust gas generated by burning fuel, wherein: the exhaust gas treatment device comprises one or more catalyst units, each of which includes a first denitration catalyst for reducing nitrogen oxides in the exhaust gas, an ammonia decomposition catalyst that is provided downstream of the first denitration catalyst in an exhaust gas flow and is for decomposing ammonia in the exhaust gas, and a second denitration catalyst that is disposed downstream of the ammonia decomposition catalyst in the exhaust gas flow and is for reducing nitrogen oxides in the exhaust gas; and the ratio (CNH3_FSCR / CN2O_SYS) of the concentration of ammonia (CNH3_FSCR) at the outlet of the first denitration catalyst to the concentration of dinitrogen monoxide (CN2O_SYS) at the outlet of the one or more catalyst units is 10.0 or greater.

According to an example aspect of the present invention, there is provided a method of selectively catalytically reducing dinitrogen oxide present in a gaseous sample, comprising: providing a catalyst capable of reducing dinitrogen oxide; bringing the gaseous sample into contact with the catalyst to reduce dinitrogen oxide in the gaseous sample in the presence of the catalyst; wherein as a result of the reduction step, the gaseous sample is adapted for determination of the amount of an isotopic form of CO2 in the gaseous sample.

To provide an exhaust gas purification catalyst for an ammonia engine, capable of purifying unburned ammonia (NH3) and / or nitrogen oxides (NOx) contained in exhaust gas during start-up of the ammonia engine, while suppressing emission of nitrous oxide (N2O).SOLUTION: An exhaust gas purification catalyst for an ammonia engine, comprises support particles 211 and a catalytic noble metal 212 supported on the support particles 211, wherein the support particles 211 comprise alumina support particles, and at least 90 mol% of the catalytic noble metal 212 is supported on the alumina support particles.SELECTED DRAWING: Figure 1

The present disclosure provides a method for reducing dinitrogen monoxide emission from a soil composition containing a nitrogenous fertilizer. The soil composition contains a base soil and the nitrogenous fertilizer. The method for reducing dinitrogen monoxide emission comprises mixing decomposed leaf matter with the base soil and adjusting the mixed proportion of the decomposed leaf matter to 50 vol% or more of the total of the base soil and the decomposed leaf matter.

A processing method can be performed to produce a semiconductor structure that can include a high-k dielectric material. The method can include removing a native oxide from a surface of a substrate. The method can include delivering dinitrogen monoxide to the substrate and thermally annealing the surface to form an oxide-containing interface. The method can include delivering a nitrogen-containing precursor or an oxygen-containing precursor to a substrate housed in a semiconductor processing chamber. The method can include forming reactive ligands on an exposed surface of the substrate using the nitrogen-containing precursor or the oxygen-containing precursor. The method can further include forming a high-k dielectric material covering the substrate.

To provide a dinitrogen oxide purification system, an internal combustion engine system, and a dinitrogen oxide purification method, which make it easy to obtain sufficient effects of decomposing or reducing dinitrogen oxide.SOLUTION: A dinitrogen oxide purification system 10 includes an intake section 14 and a purification section 1. The intake section 14 takes in dinitrogen oxide in the presence of coexisting O2 and / or H2O. The purification section 1 decomposes or reduces the dinitrogen oxide taken into the intake section 14.SELECTED DRAWING: Figure 2

The application discloses an oxygen carrier for methane chemical looping combustion coupled with N2O decomposition, a preparation method and application thereof, and belongs to the technical field of methane chemical looping combustion and N2O decomposition. x Ba 1‑ x Fe 12‑y Ti y O 19 , wherein 0 <= x < 1, 0 <= y <= 2, and x and y are not 0 at the same time. The application is modified by A-site La and B-site Ti double doping, La is used to inhibit the hetero-phase and improve the sintering resistance, and Ti is used to construct a local Fe-O-Ti configuration to promote the formation of oxygen vacancies. The application realizes efficient collaborative conversion of methane and dinitrogen monoxide and excellent cycle stability of the oxygen carrier.

A method of selectively catalytically oxidizing dinitrogen oxide present in a gaseous sample, comprising: heating a NiO catalyst to a temperature of at least 250° C.; and bringing the gaseous sample into contact with the heated NiO catalyst to oxidize dinitrogen oxide of the gaseous sample in the presence of the heated NiO catalyst.