354 results about "Nitric Oxide / Nitrogen" patented technology

A process for fabricating a semiconductor device having a high-K dielectric layer over a silicon substrate, including steps of growing on the silicon substrate an interfacial layer of a silicon-containing dielectric material; and depositing on the interfacial layer a layer comprising at least one high-K dielectric material, in which the interfacial layer is grown by laser excitation of the silicon substrate in the presence of oxygen, nitrous oxide, nitric oxide, ammonia or a mixture of two or more thereof. In one embodiment, the silicon-containing material is silicon dioxide, silicon nitride, silicon oxynitride or a mixture thereof.

The present invention relates to a technology to purify nitrogen oxides contained in exhaust gas exhausted from lean combustion engines such as diesel engine with ammonia and a selective catalytic reduction type catalyst, and an object of the present invention is to provide a selective catalytic reduction type catalyst which can effectively purify nitrogen oxides even at a low temperature as well as inhibit leak of ammonia, and an exhaust gas purification equipment and a purifying process of exhaust gas using the same.

The present invention is a selective catalytic reduction type catalyst for purifying nitrogen oxides in exhaust gas exhausted from lean combustion engines using ammonia or urea as a reducing agent, it is provided with a selective catalytic reduction type catalyst, characterized in that said catalyst comprises a lower-layer catalyst layer (A) having an oxidative function for nitrogen monoxide (NO) in exhaust gas and an upper-layer catalyst layer (B) having an adsorbing function for ammonia on the surface of a monolithic structure type carrier (C), and that the lower-layer catalyst layer (A) comprises a noble metal component (i), an inorganic base material constituent (ii) and zeolite (iii), and the upper-layer catalyst layer (B) comprises substantially none of component (i) but the component (iii).

The present invention relates to nitric oxide-releasing amidine- and enamine-derived diazeniumdiolates, compositions comprising such compounds, methods of using such compounds and compositions, and to a method for the preparation of nitric oxide-releasing amidine- and enamine-derived diazeniumdiolates via the direct reaction of nitric oxide with amidines and enamines, and to a method of converting amines into such compounds.

An exhaust gas post treatment system for nitrogen oxide and particle reduction of internal combustion engines operated with excess air. An oxidation catalytic converter is disposed in the exhaust gas stream of the engine for converting at least a portion of the nitric oxide in the exhaust gas into nitrogen dioxide. The first particle separator or filter is disposed in the exhaust gas stream downstream of the oxidation catalytic converter for converting carbon particles accumulated in the separator or filter into carbon monoxide, carbon dioxide, nitrogen and nitric oxide with the aid of nitrogen dioxide contained in the exhaust gas. A partial exhaust gas stream is branched off from the exhaust gas stream upstream of the first separator or filter. A metering device adds reduction agent to the partial exhaust gas stream in the form of ammonia or a material that releases ammonia downstream of the supply location due to hot exhaust gas. A second particle separator or filter is disposed in the partial exhaust gas stream downstream of the supply location. The partial exhaust gas stream returns to the exhaust gas stream downstream of both particle separators or filters. An SCR catalytic converter is disposed downstream of the return location for reducing nitrogen oxides in the exhaust gas to nitrogen and water vapor with the aid of ammonia or released ammonia by way of selective catalytic reduction.

The present invention relates to provides one kind of RE perovskite type catalyst for catalytic oxidation of NO into NO2, and features that the catalyst includes the perovskite type active component A1-xA'xB1-yB'yO3, where, A represents RE metal element La, A' includes Zr, Ce, Sr, Ca, Ba and Pr, B and B' represent transition metal element Fe, Co, Ni, Mn, Cu or Ti, x is 0-0.9, and y is 0-1.0. The catalyst of the present invention has simple preparation process, low cost, and NO oxidizing activity up to 80 % at 300 deg.c. It may be used to replace noble metal catalyst for oxidizing NO in lean combustion tail gas into NO2 to raise the NOx eliminating rate.

The invention belongs to the field of biomedical engineering materials and discloses a nitric oxide loaded cationic polymer, a preparation method therefor and an application of the nitric oxide loaded cationic polymer in the field of biomedicine. A cationic polymer which is used for loading nitric oxide and containing a dendritic polyamide element specifically is a polyethyleneimine grafted dendritic polyamide polymer and has a molecular formula shown in the description. The invention further provides the nitric oxide loaded cationic polymer based on the polymer. The nitric oxide loaded cationic polymer disclosed by the invention can be applied to the field of biomedicine as a nitric oxide donor material through loading NO, is used as a biomedical material and particularly is applied to the preparation of antibacterials; and the nitric oxide loaded cationic polymer has the effects of effectively inhibiting the growth and reproduction of bacteria and fungi, has remarkable inhibitory effects on common oral cavity pathogenic bacteria, dermatophyte, wound infection bacteria and the like, has the functions of promoting wound healing, diminishing inflammation and the like and provides a support for the application of the nitric oxide loaded cationic polymer in preparation of the biomedical engineering materials.

The present disclosure is directed to a method of producing nitric oxide comprising (i) providing a composition comprising a metal-organic framework, and (ii) exposing the composition to a nitric oxide-releasing compound. The disclosure also is directed to compositions, coatings, and medical devices comprising a metal-organic framework.

The invention relates to a gamma-form alumina loaded metallic oxide catalyst as well as a preparation method and application thereof. The gamma-form alumina loaded metallic oxide catalyst is prepared by adopting an immersion method. The particular preparation method is explained in the specification. The gamma-form alumina loaded metallic oxide catalyst disclosed by the invention has the advantages of adjustable pore structure, large specific surface area, good absorption property, high mechanical strength, good surface acidity and heat stability, and the like. The gamma-form alumina loading metallic oxide catalyst disclosed by the invention is used for carrying out simultaneous desulfuration and denitration on a flue gas and catalytic reduction on nitric oxide and sulfur dioxide which are contained in the flue gas by adopting CO as a reducing agent, and is particularly used in the field of processing of an FCC (Fluid Catalytic Cracking) flue gas and the flue gas of a power station boiler.

A method of oral treatment comprises passing a flow of a gas mixture from a pressure vessel containing the gas mixture through a generator of non-thermal plasma; applying a partially ionising electrical potential to the flow of the gas mixture in the plasma generator, and thereby forming a non-thermal gaseous plasma in the gas mixture, and causing the flow of the gas mixture downstream of the plasma generator to perform the oral treatment. The gas mixture comprises (a) a noble gas selected from helium and argon and mixtures thereof, and (b) an additive gas selected from water vapour, air, oxygen, nitrogen, hydrogen, carbon monoxide, carbon dioxide, nitrous oxide and nitric oxide and mixtures of any two or more thereof. The additive gas forms up to 1% by volume of the gas mixture. The oral treatment may be the cosmetic whitening of teeth, the non-clinical cleaning of teeth or the in situ cleaning of orthodontic braces, amongst others.

A cosmetic treatment method, and a device therefor, are provided that allow for cosmetic treatment of cosmetic disorders, caused by chronological age, environmental factors, changes in physiological functions of skin, such as psoriasis, dermatitis, acne, cellulites, and viral and/or bacteriological attacks. The device comprises a nitric oxide (NO) eluting polymer arranged to contact the area to be cosmetically treated, such that a cosmetic dose of nitric oxide is eluted from said nitric oxide eluting polymer to said area. The nitric oxide (NO) eluting polymer is integrated with a carrier material, such that said carrier material, in use, regulates and controls the elution of said cosmetic dosage of nitric oxide (NO). Furthermore, a manufacturing method for said device is provided.

The invention discloses a gas phase oxidization-liquid phase oxidization-absorption three-section type dry-wet-process flue gas denitration process. According to the process, ozone is used as a gas-phase oxidant to oxidize one part of nitric oxide in flue gas into high-valence-state nitric oxide capable of being absorbed by slurry; any one or a mixture solution of more of hydrogen peroxide, sodium hypochlorite, sodium chlorite, sodium chlorate, sodium persulfate, potassium chlorate, potassium hypermanganate and potassium dichromate is sprayed to be used as a liquid-phase oxidant to oxidize the residual high-valence-state nitric oxide in the flue gas into the high-valence-state nitric oxide; and the flue gas enters an absorption tower and a magnesium hydroxide solution is sprayed to absorb the high-valence-state nitric oxide. Compared with the prior art, the process firstly adopts two times of oxidization of a gas phase and a liquid phase and a magnesium oxide wet process is used for absorbing so that a target of efficiently removing the nitric oxide is realized; and by virtue of the technical scheme, the use amount of the ozone is reduced, the equipment cost and operation cost are reduced and the denitration efficiency is improved and can reach more than or equal to 93%.

A nitrogen-oxide gas sensor that is able to measure a nitric oxide and a nitrogen dioxide at the same time, and ensure sensing accuracy and stability over a long period of time.

The nitrogen-oxide gas sensor includes: a first oxygen ion conductive solid electrolyte; a first film contacting the first oxygen ion conductive solid electrolyte and formed of a metal oxide; a second film contacting the first oxygen ion conductive solid electrolyte and formed of a metal oxide; a power supply source for applying a current to the first and second films by electrically connecting a first node to the first film and a second node to the second film; a measurement unit for measuring an electric potential difference between the first and second nodes; and a temperature adjustment unit for uniformly maintaining a temperature of at least one of the first and second films.

The invention refers to a method for eliminating nitrogen oxide from waste gas, which solves the problem of high investment and high cost by using current selective catalyst reducing method and selective non-catalyst reducing method. It uses the ferrous iron mist liquid as the denitriding liquid. The reducing matter is iron. The method uses ferrous chelator to react with the nitrogen oxide, generates nitrosyl complex, the nitrogen oxide in the waste gas enters the liquid phase, the iron and the nitrosyl complex react, reduces the nitrogen combined with the chelate iron into N2. The process is simple, the operation is convenient. The cost is low, and the efficiency is high.

The invention concerns a breathing assistance apparatus having a source of Nitric Oxide in fluid communication with a nasal cannula assembly (10) adapted to deliver gases to a patient comprising a first compartment (1) and a second compartment (2) separated by a separation wall (6); a pair of nasal prongs (5) in fluid communication with the first compartment (1); the first compartment (1) comprising a first inlet (11) for introducing a first gas into said first compartment (1); the second compartment (2) comprising a second inlet (2) for introducing a second gas into said second compartment (2); and the separation wall (6) comprising at least one flow restriction element (35) for controlling the passage of gas from the second compartment (2) to the first compartment (1).

The invention relates to a chromium-doped catalyst for catalytic oxidation of nitric oxide at a normal temperature and pressure, as well as a preparation method and an application thereof. The chromium-doped catalyst is prepared by using a deposition precipitation method. The preparation method comprises the following steps: weighing a chromium precursor; dissolving the chromium precursor in deionized water; adding one or a combination of nitrate, chloride and hydrogen chloride, wherein the doping content is from 0.5% to 100%; stirring the mixture at the normal temperature to 100 DEG C; adding a precipitator; after regulating the pH value as 3 to 10, stirring for 5 to 8 hours and carrying out a filtering and washing operation; drying for 12 hours at the temperature of 60 to 150 DEG C; and calcining for 2 to 6 hours at the temperature of 100 to 700 DEG C, thereby obtaining the chromium-doped catalyst for the catalytic oxidation of nitric oxide at the normal temperature and pressure. When the chromium-doped catalyst is applied to a catalytic oxidation reaction of the nitric oxide (NO), the nitric oxide (NO) can be converted into nitrogen dioxide (NO2) through the catalytic oxidation at the normal temperature and pressure, so that a higher conversion rate is obtained; and the high activity and high stability of the chromium-doped catalyst are maintained for a long time. The chromium-doped catalyst provided by the invention has the advantages of easiness in raw material obtainment and simplicity in preparation, thereby having a very good application prospect.

The invention relates to a preparation method and an application of a catalyst, wherein a gamma-type aluminium oxide serves as a carrier to load a metallic oxide catalyst. The catalysts related in the invention are prepared thorough a dipping method. The catalyst has the advantages that the gamma-type aluminium oxide catalyst has the advantages of adjustable pore structure, larger specific surface area, better absorbability, higher mechanical strength, acidity of the surface, good thermal stability and the like. The catalyst is used to remove the NO and the SO2 in the smoke at the same time, specifically the NO and the SO2 in the FCC (fluid catalytic cracking) smoke. According to the invention, the CO is used as a reducing agent to conduct catalytic reduction on the NO and the SO2 in the smoke.

The invention discloses a cobalt-loaded lanthanum, manganese, calcium and titanium ore type nitric oxide oxidation catalyst and a preparation method. The molecular formula is xCo/La1-yCeyMnO3, wherein x is larger than or equal to 2.5% and smaller than or equal to 20%, x is the mass fraction, y is larger than or equal to 0.1 and smaller than or equal to 0.3, and y is the mole number. Rare earth metal cerium is doped with lanthanum, manganese, calcium and titanium ore to serve as active components and carriers of the catalyst, another active component cobalt is additionally added, the conversion rate of nitric oxide catalytic oxidation can reach 85% or above, and the process used for preparing the catalyst is simple, cost is low and industrialized production can be easily achieved.

Provided are a process and an apparatus for the purification of nitric oxide for industrial, analytical, and research purposes. Nitric Oxide (chemical formula NO) is also referred as nitrogen monoxide. It is a colorless gas having extremely high reactivity toward oxygen and other oxidants present in the atmosphere. The method to purify Nitric Oxide consists in passing a steady flow of a mixture of impure Nitric Oxide, optionally diluted in an inert gas, through a filter composed of hydroxides of alkali and earth alkali metal kept at a temperature below 298 K. The Nitric Oxide is then passed through a second filter and finally collected in a sealed container. The second step has the function to remove those impurities that may not have been removed in the first step.

The invention discloses a nano-silicon gas sensitive material and a gas sensitive element belonging to the filed of new material technology and nano materials, and is characterized in that the gas sensitive material based on nano-silicon and the gas sensitive element sensitive to nitrogen-oxygen compound gases such as nitric oxide, nitrogen dioxide and the like and gases such as ammonia gas and the like can be prepared through preparing the nano-silicon by erosion of metallic catalyst silicon and adding proper catalyst such as platinum (or gold) and the like. The gas sensitive element has the advantages of good selectivity, good temperature resistance and moisture resistance, good stability, long service life, no environment pollution, stable process, good repeatability, and convenient batch production.

The invention relates to a method for generating nitric oxide, in particular for therapeutic applications, which comprises the steps of: guiding a process gas into a reaction chamber 3, wherein the process gas comprises nitrogen and oxygen, heating the process gas to a temperature which is sufficiently high to enable a reaction of oxygen and nitrogen to form nitric oxide, thereby forming a gas which comprises nitric oxide, and extracting the nitric oxide comprising gas from the reaction chamber 3, wherein oxygen is present in the process gas in the reaction chamber in an amount of <5 vol-%.

The invention discloses a method for preparing a sulfur modified ceria catalyst which has sulfur-resistance and water-resistance performance and is applicable to NH3-SCR flue gas denitrification. The method comprises the following steps of: directly calcining resolvable cerium salt in oxygen or nitrogen atmosphere to prepare ceria; and performing surface sulfur modification on the catalyst in SO2 atmosphere. The invention also discloses the sulfur modified ceria catalyst prepared by the method, and the catalyst has obviously improved catalytic activity and excellent medium-temperature activity at the temperature of between 200 and 350 DEG C. The conversion rate of nitrogen oxide of pure ceria is below 30 percent at the temperature of 260 DEG C, while at the same temperature, the sulfur modified ceria catalyst ensures that the conversion rate of nitrogen oxide reaches over 90 percent, and the modified catalyst has excellent sulfur resistance and water resistance.

The invention relates to the technical field of environmental monitoring, in particular to a continuous automatic atmospheric haze contaminant monitoring device. The continuous automatic atmospheric haze contaminant monitoring device comprises a central control module, a liquid crystal display module, a digital communication module, a fine particulate matter measuring module, a nitrogen oxide measuring module, an ozone measuring module, a carbonic oxide measuring module, a hydrocarbon measuring module, an aerosol measuring module, a visibility measuring module and a meteorological parameter measuring module. The continuous automatic atmospheric haze contaminant monitoring device automatically monitors haze contaminant comprising fine particulate matters, nitric oxide, ozone, carbonic oxide, hydrocarbon and aerosol and provides complete basic monitoring data for haze research and government due matching with measurement of the visibility and the meteorological parameters.