125 results about "No conversion" patented technology

The invention relates to a composite catalyst used for denitrification of flue gases under low-temperature conditions. The catalyst contains a Ti/Zr composite oxide as carrier, an oxide of manganese as catalytically-active component, and at least one oxide of vanadium, chromium, iron, copper, nickel and cerium as auxiliary agent. The Ti/Zr composite oxide is prepared by coprecipitation method and loads the catalytically-active component and the auxiliary agent by immersion method, wherein the mole ratio of Ti/Zr in the composite oxide is controlled in a range from 0.25 to 4, the oxide of manganese accounts for 1-15% of the weight of the Ti/Zr composite oxide, and the auxiliary agent accounts for 1-5% of the weight of the Ti/Zr composite oxide. The catalyst has good catalytic activity at low temperature and high NO conversion rate up to 100% at 100-300 DEG C, and has good prospect in industrial application.

A visibility support system is provided which displays a wide field of view while absorbing camera installation errors. The visibility support system obtains a first conversion matrix H₁ for projecting a captured image onto the ground, while a second conversion matrix H₂ for projecting the captured image on a plane different from the ground (e.g. no-conversion unit matrix) is set. An extended high-angle view image is divided into a first region corresponding to the vehicle periphery and a second region corresponding to farther away from the vehicle, and a high-angle view image based on H₁ is displayed in the first region, whereas an image based on a weight-added conversion matrix in which H₁ and H₂ are weight-added is displayed in the second region. Weight for the weight-addition is varied according to a distance from the border of the first and second regions to seamlessly join the images in both regions.

An engine exhaust catalyst containing precious metal nanoparticles is promoted with bismuth. The bismuth promotion improves the catalyst's CO oxidation performance. Also, by varying the amount of bismuth that is added, the NO conversion rate that can be realized with the catalyst can be controlled. The control over the NO conversion rate is important because the passive regenerative performance of a particulate filter used in engine exhaust systems is based on the amount NO₂ that is present in the exhaust stream that reaches the particulate filter. The amount of NO₂ being produced needs to be optimized (not necessarily maximized) so that adequate particulate filter regeneration performance can be maintained while avoiding unused, toxic NO₂ from being exhausted into the atmosphere.

The present invention belongs to the field of medicine and health care article amino acid, and includes pre-treatment of the fermented liquid to eliminate thallus, partial protein, pigment and polysaccharide, controlling the pH value of the fermented liquid after pre-treatment; electrodialysis to eliminate inorganic salt and regulating pH value again; leading in processed OH type anionic exchangecolumn to adsorb impurities and separate glutamine; decoloring, vacuum concentration, isoelectric crystallization, washing coarse crystal in organic solvent and drying. The said process has low exchange resin consumption, no conversion of glutamine in strong acid and strong alkali environment, low production cost and high total glutamine extracting rate up to 70%, and is suitable for industrial production.

The invention provides a process for deep-cooling, embrittling and broken-expanding of a connecting rod of high-rigid alloy steel, relating to an improvement of the process for processing engine components. The process comprises the following steps of: a. putting the connecting rod in liquid nitrogen for deep cooling for more than 5 minutes; basically deep cooling of the connecting rod to a test piece core part after ending of heat exchange; and measuring temperature at a fracture of the cracked test piece same as surface temperature of the test piece; b. keeping the deep cooling temperature to be lower than 156 DEG C below zero; c. placing an expanding sleeve in a macropore of the connecting rod and fixing the connecting rod on an operating board of a pressure machine, and punching the expanding sleeve by an expanding head to expand the connecting rod to be broken. The process has the advantages of changing tractility of the connecting rod of a high-power engine, and ensuring radically no conversion of mechanical performance before deep cooling and after deep cooling through utilizing the deep cooling technology. The technology is popularized and used in the high-power engine manufacture field of our country, which can combine seven or ten steps of key steps of the process for producing the connecting rod into one or two steps, thereby reducing much precision equipment for carrying out precise broaching and form grinding and so on.

The invention belongs to the technical field of denitration catalyzed production in environmental protection and particularly relates to a carbon quantum dot modified lanthanum ferrite/attapulgite nanocomposite material and a preparation method and application thereof. Lanthanum nitrate, ferric nitrate, citric acid and attapulgite are added into deionized water for full mixing, then the mixture is transferred to a water bath pot, evaporation is performed at the temperature of 50-100 DEG C to obtain wet gel, drying and calcination is performed, then the mixture is impregnated a carbon quantum dot solution, and drying and grinding are performed. The composite material is adopted as a catalyst to perform photocatalytic denitration. Compared with traditional SCR denitration, the energy consumption is greatly reduced, the NO conversion efficiency is obviously improved at low temperature.

The invention discloses a wireless charging circuit, a wireless charging system and a circuit control method, and belongs to the technical field of wireless charging. The wireless charging circuit comprises a DC/AC converter, a wireless transmitter, a control component and a wireless communication component. The wireless communication component is used for receiving the charging parameters fed back by a receiving side. The control component is used for transmitting a first driving signal or a second driving signal to the DC/AC conversion module according to the charging parameters. The DC/AC converter is used for being in the work state under the control of the first driving signal and converting the DC voltage in the work state and being in the work stop state under the control of the second driving signal and performing no conversion of the DC voltage in the work stop state. The problem of increasing of the circuit cost and the size of the present output power adjustment method can be solved so that the effects that the average power of the actual load of the receiving side is enabled to be equal to or close to the needed power of the load and the efficiency and the power densityof the wireless charging system can be enhanced can be achieved.

The invention provides a method for denitrifying NO by directly decomposing NO catalytically by using a supported metal oxide catalyst. The method is carried out in a microwave field. The catalyst is a supported mixed metal oxide catalyst which is characterized in that a mixed metal oxide MOx is supported on an Al2O3 carrier, wherein M is selected from two or three of cerium, copper, manganese and nickel; preferably, the catalyst is selected from CeCuOx/Al2O3, CeMnOx/Al2O3, CeNiOx/Al2O3 and CeCuMnOx/Al2O3. The method has the advantages that secondary pollution is avoided through microwave catalytic direct NO decomposition reaction; the process is simple, is convenient to operate and easy to control, is high in NO removal efficiency (the NO conversion rate can be 95.1%), strong in oxidation resistance and low in operating temperatures, is energy-saving and environment-friendly and is low in operating cost; the flue gases or waste gases treated by using the method can be directly up to the national emission standard.

The invention relates to a method for catalytic oxidation of nitric oxide with a low-temperature plasma modified catalyst. In the method, a catalyst is arranged in a plasma reactor to be modified under certain condition, thereby significantly improving the property of the catalyst for low-temperature catalytic oxidation, and the NO conversion rate can reach 80-86 percent at 50-150 DEG C. The NO in mixture can be oxidized into NO2 and enter into an ammonia absorption bottle along with the gas, thereby obtaining an ammonium nitrate product which can be used as a raw material of a fertilizer. The catalyst is mainly used for purifying NOX in the industrial waste gas emitted from coal-based power plants and other fixed sources. The invention can significantly improve the low-temperature oxidation activity of the catalyst, and facilitate the increase of the purification efficiency in the following liquid-phase absorption.

The invention discloses a preparation method of a cerium-titanium composite oxide low-temperature SCR catalyst and belongs to the technical field of catalyst preparation. The preparation method particularly includes: placing a cerium precursor, an organic ligand, a carrier TiO2 and a small amount of organic solvent into a ball milling tank for ball milling to obtain well-mixed powder; calcining to obtain the CeO2-TiO2 composite oxide catalyst, wherein content of cerium oxide is 5-90wt%. Within a temperature range of 200-400 DEG C, NO conversion ratio of the catalyst is maintained higher than 95%. The preparation process is simple, preparation conditions are easy to control, and the preparation method is environment-friendly.

The invention discloses a method for measuring the axial clearance or the preload clearance of back-to-back angular contact ball bearings, which comprises the steps of firstly manufacturing an outer ring spacer bush (4), a gasket (1), an inner diameter load block (7) and a measurement system and then correcting measurement instruments, wherein the inner ring (2) of a bearing I is arranged on the gasket, the bearing I and a bearing II are arranged on the outer ring spacer bush back to back, the inner diameter load block is arranged in the inner ring (6) of the bearing II; and during the correction of instruments, one end of each of the two equilong levers, which is provided with a right-angle measuring head, extend into an inner ring space bush through each notch groove of the inner ring spacer bush. During the measurement, the inner diameter load block of a balance weight applies axial load to the bearing I and the bearing II, the two right-angle measuring heads respectively align to the center points A and B of the bearing I and the bearing II, wherein A-B=delta, if the delta is a negative value, the bearing I and the bearing II are in axial clearance, and if the delta is a positive value, the bearing I and the bearing II are in preload clearance. The invention has the advantages of simple operation, no complicated conversion for obtaining measurement result, visually readable values A and B, and no conversion and cumulative errors.

An illumination device includes a first light source, a second light source, and a light-diffusing medium. The first light source emits light of a first hue, and the second light source emits light of a second hue. The light-diffusing medium receives light emitted from the first and second light sources. The light-diffusing medium is composed of a light-transmitting material and a light color-converting material. The light color-converting material is selected to convert the light of a first hue into a light of a third hue, and to pass the light of the second hue with substantially no conversion. The light-diffusing medium thus emits light of a perceived hue that is a combination of the light of the third hue and the light of the second hue. By adjusting the relative intensities of the light emitted by the first and second light sources, the perceived hue can be readily transformed or tuned.

An anaerobic-aerobic process control method for the efficient phosphorus removal and nitrogen reservation of municipal domestic sewage belongs to the municipal domestic sewage processing and recycling fields. A complete sewage regeneration flow represented by using anaerobic-aerobic processes to remove phosphorus and organic matters and using an autotrophic nitrogen removal technology to remove nitrogen is an effective approach for realizing the low-carbon and high-efficiency processing of the sewage; and the subsequent autotrophic nitrogen removal technology has no phosphorus removal function and treats ammonia nitrogen as inlet water, so the total phosphorus content of the outlet water of the anaerobic-aerobic process in the complete flow is less than 0.5mg/L and reaches a first order A standard, and nitrogen reservation, no conversion and low loss are reached. The anaerobic-aerobic process efficient phosphorus removal and low nitrogen operation is realized through treating the domestic sewage as base water, carrying out gradient oxygen limitation, strictly controlling the sludge age and inhibiting ammoxidation and denitrification through providing the anaerobic-aerobic process control parameters at different temperatures under a normal temperature condition.

The invention provides a catalyst for propylene to selective reduce NO on oxygen-enriched condition, which comprises: the La2O3-ZrO2-Al2O3 as complex carrier composed of 9-11% ZrO2, 3-5% La2O3 and 84-88% Al2O3; and 1-5wt% Cu2+ as active constituent. Wherein, the carrier is prepared by: synthesizing by hydrothermal method, dipping to modify by SO42-, drying, baking, dipping with Cu2+ solution, drying, and baking. This invention has NO conversion more than 84%, well moisture-proof and heat-proof properties and wide temperature operation range, and provides a practical approach to tail gas decontamination facility.

There is provided a nitrogen compound analyzer capable of easily and accurately measuring the two components NH3 and NO2 or each nitrogen compound component in a single sample. The nitrogen compound analyzer includes: a plurality of sample treatment systems by which a single sample is divided and which includes (A) a treatment system having oxidation means for oxidizing ammonia in the sample and conversion means for converting nitrogen dioxide in the sample to nitrogen monoxide, (B) a treatment system having conversion means for converting nitrogen dioxide in the sample to nitrogen monoxide, and (C) a treatment system in which no conversion treatment is performed on a specific component in the sample; changeover means capable of providing a specific combination of any of the treatment systems (A), (B) and (C); and at least one measurement means for continuously measuring nitrogen monoxide in the sample.

The invention provides a preparation method and an application of a Cu-ZSM-5 doped Zr and Sr composite catalyst. The composite Zr-Sr/Cu-ZSM-5 catalyst which is high in specific surface area (350-400m2/g) is prepared by the following steps: exchanging a Na-ZSM-5 molecular sieve with NH4Cl to prepare an amino type NH4-ZSM-5 molecular sieve; then, adding a copper acetate solution to the NH4-ZSM-5 molecular sieve, preparing a Cu-ZSM-5 molecular sieve by virtue of an ion exchange method, and doping little Zr and Sr by virtue of an impregnation method. Within a relatively wide temperature range, the catalyst has a high catalytic elimination effect (NO conversion rate is 50-97%) for pollutants which are high in space velocity (120,000-360,000mL.(g.h)-1), high in O2 concentration (10-20vl%), high in H2O content (5-10wt%) and low in NO concentration (300-1000ppm). By adding a hydrocarbon compound (100-300ppm propylene) to a reaction system, the catalyst is high in anti-carbon-deposition performance.

The invention discloses a flue gas denitrification catalyst and a preparation method thereof. The flue gas denitrification catalyst comprises a carrier component TiO2, an active component CeO2 and an assistant MoO3, wherein the mass of the CeO2 accounts for 5-20wt percent of that of the TiO2, and the mass of the MoO3 accounts for 1-20wt percent of that of the TiO2. According to the flue gas denitrification catalyst, anatase type titanium dioxide is used as a carrier, and by adopting a sol-gel method, the active component cerium oxide and a cocatalyst molybdenum trioxide are loaded on the carrier. The catalyst is a selective reduction denitrification catalyst with the good activity, in a range of 300-450 DEG C, the NO conversion rate of more than 90 percent can be maintained and relatively high water-resisting and sulphur-resisting performances are obtained; at a temperature of 350 DEG C, after sulfur dioxide and water vapor are introduced for 7.5h, the NO conversion rate can be kept more than 80 percent, and after the introduction of the sulfur dioxide and the water vapor is stopped, the NO conversion rate is recovered to be 97 percent.

The invention discloses a preparation method of a Mo modified Cu-SSZ-13 catalyst. Ammonium molybdate tetrahydrate and copper nitrate are taken as precursors and are directly dipped and loaded to an H-SSZ-13 (SiO2:Al2O3=10:1) molecular sieve. In the Mo modified Cu-SSZ-13 catalyst, the mass percent of Cu is 4 percent, and the mass percent of Mo is 0.2 to 3 percent. Active components are transition metal Cu<2+>, a Bronsted acidic locus and a Lewis acidic locus. The transition metal catalyzes the NO oxidation, and all the acidic loci take charge of ammonia activation. When the addition of Mo is 0.2 percent, a NO conversion rate temperature window is widened; when the addition of Mo is 0.5 percent or more, a NOx conversion rate temperature window is reduced. Through the adoption of the Mo modified Cu-SSZ-13 catalyst, the discharge of NOx can be reduced, and meanwhile the generation of a by-product N2O can be reduced.

A robustness model fitting method based on supermap mode search relates to the computer visual technology; the method comprises the following steps: preparing a dataset; setting up a supermap model G-(V, E), one model assumption corresponds to one peak v of the supermap, and a data point corresponds to a super edge e, so each peak is connected with an inner point of the corresponding model assumption, i.e., the super edge; using a non-parameter kernel density estimation method to evaluate a weight fraction w (v) of each peak v, so a model fitting problem can be converted into a mode search problem in the supermap; providing mode search through searching weight peak in the supermap; determining inner points and parameters of each structure through searched mode and supermap model; cutting an image according to the parameters and inner points of each structure so as to complete model fitting. The robustness model fitting method can alleviate data distribution sensitivity, and the set supermap needs no conversion, and can be directly applied to mode search.

The invention discloses a preparation method of a supported medium and high temperature denitration catalyst. The method comprises the following steps: 1, dissolving a soluble active metal component precursor salt and a soluble auxiliary metal component precursor salt into deionized water to obtain a transparent impregnation solution; 2, impregnating a molecular sieve carrier for 6h-24h, filtering, drying at temperature of 80-120 DEG C for 12h-24h to obtain a catalyst precursor; 3, putting the catalyst precursor in a heat treatment furnace, heating to 300 DEG C-400 DEG C, calcining while introduction of air for 1h-3h, heating up to 600-800 DEG C, calcining for 2h-6h, and cooling to obtain the supported medium and high temperature catalyst. The supported medium and high temperature denitration catalyst prepared by the method has high strength, is not easy to pulverize, has long service life, and has low catalyst bulk density. The catalyst has a NO conversion rate of 85% or more at a suitable application temperature of 300 to 500 DEG C.

The invention discloses a method for automatically identifying and removing industrial interface based on dual factors. The method comprises the following steps: after seismic data are acquired, carrying out frequency domain filtering on each channel of data, respectively calculating energy A (y(t)) of a filtering result and energy A (x(t)) of original data, and dividing A (x(t)) by A (y(t)); if the ratio is greater than 0.001 and the filtering result passes through a zero point for 90-110 times within 1 s, judging that the channel has 50 Hz industrial interference, otherwise judging that no industrial interference exists; processing the channel with the industrial interference by a sine and cosine weighing approach method to obtain seismic data subjected to interference removal. According to the method, the industrial interference is detected and suppressed within a time domain of original shot data, so that no conversion to a detection point or a frequency domain is needed, and the time and the space are greatly saved; furthermore, only records with the interference are processed, so that the signal-to-noise ratio of the seismic data can be effectively increased, and the method is an efficient fidelity processing technology.

The invention provides a preparation method and application of a Fe-ZSM-5 doped Rh and Er composite catalyst. The preparation method comprises the following steps: preparing a sodium type high-silicon-aluminum-rate Na-ZSM-5 molecular sieve by virtue of a hydrothermal method, exchanging the sodium type high-silicon-aluminum-rate Na-ZSM-5 molecular sieve and NH4Cl to prepare an ammonium type NH4-ZSM-5 molecular sieve, adding the NH4-ZSM-5 molecular sieve into a ferric nitrate solution, preparing a Fe-ZSM-5 molecular sieve by virtue of an ion exchange method, and doping a small amount of Rh and Er to prepare a high-silicon-aluminum-rate (350 to 420m<2>/g) composite Rh-Er/Fe-ZSM-5 catalyst by virtue of an impregnation method. The prepared catalyst has good catalytic removal effects (NO conversion rate of 45 to 95 percent) on high-airspeed, high-O2-concentration, high-H2O-content and low-NO-concentration (300 to 1,000ppm) pollutants within a wider temperature (150 to 650 DEG C) range. Moreover, the initial NO conversion rate of the catalyst within 100 hours within the wide temperature range (150 to 650 DEG C) is maintained.

An engine exhaust catalyst containing precious metal nanoparticles is promoted with bismuth. The bismuth promotion improves the catalyst's CO oxidation performance. Also, by varying the amount of bismuth that is added, the NO conversion rate that can be realized with the catalyst can be controlled. The control over the NO conversion rate is important because the passive regenerative performance of a particulate filter used in engine exhaust systems is based on the amount NO₂ that is present in the exhaust stream that reaches the particulate filter. The amount of NO₂ being produced needs to be optimized (not necessarily maximized) so that adequate particulate filter regeneration performance can be maintained while avoiding unused, toxic NO₂ from being exhausted into the atmosphere.