41results about How to "Lower catalytic temperature" patented technology

The invention relates to a method for preparing a cerium oxide nanometer rod at a mild condition, which belongs to the preparation technical field of inorganic nanometer materials, and comprises the main steps as follows: (1) the preparation of a cerium salt liquor: cerium salt is dissolved in an appropriate amount of deionized water and prepared into the 0.1-0.8mol/l cerium salt liquor; (2) the preparation of a concentrated alkali liquor: alkali is dissolved by using the appropriate amount of deionized water and prepared into the 10-15mol/l concentrated alkali liquor; and (3) the mixing of the two liquor for carrying out liquid phase reaction: the cerium salt liquor is quickly poured into the concentrated alkali liquor at the temperature of 10-40 DEG C; the volume ratio of the two used liquor is 1:3 to 1:7; after the reaction is finished, a white precipitate is generated, stayed in the liquor for ageing for 1 hour to 9 days, then washed and dried and finally the cerium oxide nanometer rod is obtained.

An exhaust gas control device for an internal combustion engine includes an estimation unit configured to estimate a temperature of a catalyst on the basis of an acquired operation state of the internal combustion engine and a difference between a lean air-fuel ratio and a rich air-fuel ratio which are set as target air-fuel ratios during execution of catalyst regeneration control, a determination unit configured to determine whether the estimated temperature of the catalyst is higher than a threshold value during execution of the catalyst regeneration control, and a prohibition unit configured to prohibit the catalyst regeneration control when it is determined that the estimated temperature of the catalyst is higher than the threshold value during execution of the catalyst regeneration control.

The present invention relates to a hollow pearl nano cerium oxide and its preparation method. The invented nano cerium oxide is a spherical granule whose diameter is 80-200 nm and centre has a through hole whose diameter is 10-60 nm. Said invention utilizes organic solvent to make the cerium salt be dissolved, and further utilizes solvent heat to make the hollow pearl nano cerium oxide be formed on the surface of carbon nano tube, then the template is removed, so that the correspondent hollow pearl nano cerium oxide can be obtained.

A low-temperature sulfur-resistant vanadium-titanium denitration catalyst and a preparing method are disclosed and belong to the field of denitration catalysts. The low-temperature sulfur-resistant vanadium-titanium denitration catalyst is prepared with a steeping method, anatase type titanium dioxide serves as a carrier, and vanadium pentoxide, tungsten trioxide and ruthenium are loaded on the surface of the carrier, wherein TiO2 accounts for 70-95 wt%, V2O5 accounts for 0-10 wt%, WO3 accounts for 0-20 wt%, and Ru accounts for 0.1-0.8 wt%. The chemical composition precursors of V2O5, WO3 and Ru are ammonium metavanadate, ammonium tungstate and ruthenium trichloride respectively. By loading trace precious metal elements, the denitration catalyst can maintain the efficiency of 90% or above at 150-400 DEG C, and the toxic action of sulfates formed by Sox in the sulfur-containing smoke atmosphere on the catalyst can be relieved. The service life of the catalyst can be prolonged, the preparing method is easy and convenient to implement, and the production efficiency is high.

The invention discloses a gas detection method and a special sensor array thereof. The gas sensor array comprises a plasma generator and a sensor array chip, wherein one end of the plasma generator is connected with a three-way pipe; the other two ways of the three-way pipe are used as a sample gas inlet and a carrier gas inlet respectively; the other end of the plasma generator is used for introducing gas to the surface of the sensor array chip through a gas pipeline; the sensor array chip is composed of a temperature controllable inert chip, and an array composed of a plurality of sensing units and arranged on the surface of the inert chip; and different nano catalytic materials are loaded on each sensing unit. The gas sensor array combines high-activation performances of low-temperature plasmas, and the reaction activities of the catalytic materials and reactants are improved; the device is simple, the catalytic temperature is low, the energy consumption is low and the heat background is low; and the gas sensor array can be used for detecting environmental gas-state pollutants and respiratory air leaving away from a human body, and a simple and rapid novel method is provided for rapid diagnosis and early detection of diseases including cancers and the like.

The invention provides a heavy oil viscosity reducer. Based on the total weight of the heavy oil viscosity reducer, the heavy oil viscosity reducer is prepared from 1 to 15 percent by weight of component A, 0.1 to 1.5 percent by weight of component B, 0.1 to 5 percent by weight of component C and water, totaling 100 percent, wherein the component A is at least two of ammonium nitrite, sodium carbonate, sodium bicarbonate, ammonium bicarbonate and ammonium carbonate; the component B is alkylphenoxy polyoxyethylenepolyoxypropylene; the component C is an alkyl imidazole ionic liquid and/or a quaternary ammonium salt ionic liquid. The invention further provides a preparation method of the heavy oil viscosity reducer. The method comprises: mixing and stirring the component A, the component B, the component C and the water. By adopting the heavy oil viscosity reducer, the viscosity of heavy oil can be lowered remarkably; meanwhile, irreversible modification and viscosity reduction can be performed on the thick oil to transform a heavy component of the thick oil to a light component, so that the thick oil recovery efficiency is increased.

The invention provides a loading-type copper-manganese catalyst and a preparation method and application in CO low-temperature catalytic oxidation thereof. The method includes the steps of blending ceric oxide with steeping liquid containing copper salt and manganese salt to obtain a mixture; drying the mixture to obtain a catalyst precursor; conducting calcine on the catalyst precursor to obtainthe loading-type copper-manganese catalyst. The catalyst includes a ceric oxide carrier and active components loaded on the carrier, wherein the active components are copper oxide and manganese dioxide. According to an experimental result, the loading -type copper-manganese catalyst prepared in the embodiment of the invention can maintain high catalytic activity for high-concentration CO catalyticoxidation (4000 ppm) under a low-temperature condition (0-150 DEG C), effectively reduce catalytic temperature of traditional Hopcalite and decrease energy consumption of a system reaction. Additionally, the preparation method is simple, the prepared catalyst can be applied to low-temperature CO catalytic clearance of sealed spaces including submarines and space stations and the like.

In a hydrogen generation device according to the invention, PSR reformers have a heat capacity smaller than that of the other PSR reformers. Therefore, the temperature of the catalyst reaches to a reforming-start temperature more quickly in the PSR reformers than in the other PSR reformers. When the hydrogen generation device is started and the reforming reaction is carried out, the mixture of gasoline vapor and water vapor is selectively and preferentially supplied to the PSR reformers so that the reforming reaction is carried out in the PSR reformers.

An addition valve is provided upstream of an exhaust gas purifying catalyst (NOx catalyst) in an exhaust pipe and in the vicinity of a water jacket in a cylinder head, in addition to a fuel injection valve injecting fuel for combustion in a combustion chamber. The addition valve injects a reducing agent in an addition amount in accordance with an operation state of an engine. Using an engine coolant temperature correlated to a temperature of the addition valve, a target addition interval of the addition valve is made shorter with increase in the engine coolant temperature, so that the addition amount is increased (step 130). The temperature of the exhaust gas purifying catalyst (catalyst bed temperature) is raised as a result of increase in the addition amount. Here, a target injection amount of fuel, representing one of parameters other than the addition amount that affect the catalyst bed temperature, is restricted by using an injection amount upper limit, such that the catalyst bed temperature does not exceed an upper limit of an allowable range (steps 240, 250).

A method to regulate catalyst temperature by adjusting engine air and fuel amounts. The method provides catalyst temperature regulation while reducing fuel consumption.

The invention provides a low-temperature-resistant PVC composite cable material which is prepared from 100 parts of EPDM composite, 18 to 20 parts of ethylene-vinyl acetate copolymer, 16 to 18 parts of nano silicon dioxide, 4 to 6 parts of a composite compatilizer, 15 parts of chlorinated polyethylene, 5 to 8.5 parts of dicumyl peroxide, 0.2 to 0.3 part of sulfur, 0.4 part of a TMTD accelerant, 3.2 to 5.5 parts of a composite vulcanizing agent, 60 to 80 parts of a filling agent, 15 to 20 parts of high polymerization degree polyvinyl chloride, 0.8 part of an anti-aging agent and 20 to 25 partsof a plasticizer, wherein the EPDM composite is prepared from 90 to 94 parts of ethylene-propylene-diene monomer and 6 to 10 parts of modified chlorosulfonated polyethylene; the composite compatilizeris prepared from a mixture of dicumyl peroxide, glycidyl methacrylate and styrene; the composite vulcanizing agent is a mixture of triallyl isocyanurate and trimethylolpropane trimethyl acrylate. According to the composite cable material disclosed by the invention, the ingredients are optimized and designed; thus, the prepared composite cable material has the advantages of better low temperatureresistance and oil resistance and more excellent mechanical property.

The invention discloses a low-temperature sulfur-resistant molybdenum-vanadium-titanium denitration catalyst as well as a preparation method and application thereof, and belongs to the field of denitration catalysts. The catalyst comprises the following components: catalyst carrier TiO2, active component V2O5, and auxiliary agent MoO3, P2O5 and RuO2. According to the catalyst provided by the invention, an impregnation method is adopted to prepare the V2O5, MoO3, P2O5 and RuO2 supported denitration catalyst, and the catalyst is mainly applied to removal of nitrogen oxides in flue gas at a low temperature; through loading of microelements of precious metals, high-activity denitration under low-temperature flue gas can be realized, deactivation of the catalyst is slowed down, and the servicelife of the catalyst is improved; and moreover, the preparation method of the denitration catalyst is simple and easy to operate, has high production efficiency, and can lay a foundation for industrialized applications in future.

The invention provides a K<+>-doped gamma-MnO2 catalyst and a preparation method and use thereof. A main body structure of the catalyst is gamma-MnO2, and pore passages of the gamma-MnO2 are doped with K<+>. The gamma-MnO2 has a [2*1] pore passage structure, and the thermal stability is higher compared with ion implantation of alpha-MnO2 and lambda-MnO2 in crystal pore passages. Through doping theK<+>, Mn-O bonds of the gamma-MnO2 can be reduced, meanwhile, surface flaw sites are increased, and then, the capacity for adsorbing active oxygen and presenting crystal lattice oxygen is enhanced, so that the K<+>-doped gamma-MnO2 catalyst has relatively high catalytic oxidation activity to VOCs and has a good application prospect.

The invention discloses a heat-insulating and flame-retardant new energy battery box which comprises a battery box body and a box body upper cover, the battery box body and the box body upper cover are connected through a buckle, and heat-insulating and flame-retardant layers are arranged on the inner surfaces of the battery box body and the box body upper cover; the heat-insulating and flame-retardant layer is formed by compounding polycarbonate, modified fibers and a flame retardant; the mass ratio of the polycarbonate to the modified fiber to the flame retardant is (50-80):(10-20):(0.2-2), wherein the modified fibers comprise modified glass fibers and chemical fibers. The invention discloses a novel heat-insulating and flame-retardant new energy battery box which can enable a new energy battery to be less interfered by external temperature during working and can also prevent the battery from explosion and other dangers in the using process to a great extent.

The invention discloses an infrared heating ironing plate which comprises a plurality of sections of ironing plates; each section of ironing plate comprises a bottom plate and a plate rack frame body; a heating bin is arranged between the bottom plate and the plate rack frame body; the heating bin comprises a bin body defined by a bin body cover and a bin body bottom frame; the upper part of the bin body is provided with an air inlet pipe; the bin body cover is internally provided with a gas dispersion plate and an insulating plate which are arranged under the air inlet pipe; the insulating plate is connected with a preheating tube; an infrared catalytic plate is connected under the preheating tube and is used for enabling gas and air to have a full oxidation reaction; and a protective net which is arranged on the bin body bottom frame is arranged under the infrared catalytic plate. After the structure is adopted, an ironing bottom plate can be evenly heated within a short time; the catalytic infrared heating is a non-flame type reaction, the catalyzing temperature of the catalytic infrared heating is lower than the ignition point and is free from the hidden danger of explosion, and harmful gases such as CO, NO and the like are not produced, so that the infrared heating ironing plate is safe and free from pollution; the infrared heating ironing plate is safe and reliable in heating; and the heating requirement of the ironing plate of a paver can be met.

The invention discloses a composite catalyst for acraldehyde synthesis as well as a preparation method and application of the composite catalyst. The composite catalyst comprises an inner core composed of active components and a shell which covers the surface of the inner core and is made of an inert porous material. When the catalyst is applied to the process of synthesizing acraldehyde through propylene oxidation, the temperature runaway phenomenon can be effectively inhibited, side reactions are reduced, and the product yield is increased.