38results about How to "Improve catalytic decomposition efficiency" patented technology

The invention discloses a supported metallic oxide catalyst for assisting microwave denitration and a preparation method and a using method thereof. The catalyst is the supported catalyst using carbon as a carrier and using a metallic oxide as an active ingredient. The carrier of the catalyst is carbon-based, is convenient to obtain, large in specific surface area and capable of playing a very good dispersing role on the active ingredient of the catalyst, and the phenomenon of ingredient agglomeration is not produced. The metallic oxide is high in activity, and required supporting amount is small. The carbon-supported metallic oxide has very good microwave absorbing ability, can well play the synergistic effect of microwaves and the catalyst, the catalytic decomposition efficiency of nitrogen oxide is high, the NO decomposition rate can be above 98%, and the catalytic decomposition temperature is low and the loss of the carbon carrier is low by means of the method.

The invention provides a preparation method of a filter material with denitration and dioxin-removal effects. The preparation method comprises the following steps: (1) after an active metal catalyst powder and PTFE resin powder are mixed, catalyst-containing PTFE fiber and a catalyst-containing PTFE micro-porous membrane are respectively prepared; (2) the catalyst-containing PTFE fiber and high-strength PTFE fiber are made into warp beams by a 1-10:1-10 alternate arrangement mode, and a PTFE base cloth layer is prepared by a weaving mode; (3) the catalyst-containing PTFE short fiber and a base material undergo composite acupuncture or spunlace on the surface of the PTFE base cloth layer so as to prepare a PTFE felt layer; (4) an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixed treating fluid, and the PTFE felt layer undergoes mass-impregnation treatment and then is sintered at 300-350 DEG C; and (5) the sintered PTFE felt layer and the catalyst-containing PTFE micro-porous membrane are simultaneously introduced into a hot laminator to undergo surface hot-press lamination processing. According to the invention, filtration accuracy and denitration and dioxin-removal efficiency can be enhanced remarkably.

The invention provides a preparation method of a high performance polytetrafluoroethylene functional filter material for denitration and dioxin removal. The method includes the steps of: (1) mixing active metal catalyst powder with PTFE resin powder to make catalyst-containing PTFE fiber and a catalyst-containing PTFE microporous film respectively; (2) making the catalyst-containing PTFE fiber and high strength PTFE fiber into a warp beam by means of 1-10:1-10 alternate arrangement, and making a PTFE base cloth layer by machine weaving; (3) mixing an active metal catalyst emulsion with a PTFE emulsion to prepare a catalyst mixed treatment solution, conducting overall impregnation treatment on the PTFE base cloth layer, and then performing sintering at 300-350DEG C; and (4) introducing the sintered PTFE base cloth layer and the catalyst-containing PTFE microporous film into a hot film laminator simultaneously, and carrying out hot pressing laminating processing. The high performance polytetrafluoroethylene functional filter material provided by the invention can significantly improve the filtering precision and the efficiency of denitration and dioxin removal.

The invention provides a composite material for catalyzing formaldehyde decomposition and a preparation method thereof. The preparation method of the composite material for catalyzing the formaldehydedecomposition comprises the following steps: S1, stirring a carrier comprising zeolite and clay mineral in water to obtain a slurry, wherein the mass of the clay mineral is lower than or equal to 20%of the total mass of the carrier, the carrier is added into water of which the water absorption is 9-11 times of that of the carrier, and the stirring time is at least 10min; S2, modifying the slurryto obtain a modified carrier; S3, performing a reaction on the modified carrier and a catalyst in an anhydrous toluene solution, and after the reaction, washing and drying to obtain the composite material. According to the preparation method of the composite material for catalyzing the formaldehyde decomposition, provided by the embodiment of the invention, raw materials are easy to obtain, the preparation method is simple and convenient, and the reaction is convenient to control; the composite material prepared by preparation method has high formaldehyde adsorbing capacity; the composite material can efficiently decompose formaldehyde without additional energy delivery.

The invention relates to the field of air purification technology, in particular to a photocatalytic decomposition purification system for organic waste gas, comprising an air inlet pipe, a dust removal pipe, a circulation pipe, a catalysis mechanism, a cleaning mechanism, a first traction mechanism, an exhaust pipe, a second traction mechanism and a spraying mechanism. The circulation pipe of a U-shaped structure can prolong the flow speed of flue gas, so that the solid particles can gather at the bottom of the circulation pipe, and obliquely distributed first and second baffles can be used for filtering out of the solid particles, thereby further improving the filtration effect; the spraying mechanism communicating with the top of the circulation pipe can accelerate the falling speed ofthe solid particles, and can cause a neutralize reaction with the flue gas to further improve the separation effect; and the first traction mechanism and the second traction mechanism can drive the cleaning mechanism to move up and down to scrape off dirt attached to the outer wall of an ultraviolet lamp, thereby ensuring the illumination intensity of the ultraviolet lamp, and improving the catalytic decomposition efficiency.

The invention discloses a method for growing copper-based multilayered graphene. The method comprises following steps: (1) after pre-treating a copper foil substrate, putting into a bracket; (2) covering the outer surface of the bracket with one layer of metal foil; (3) putting the bracket covered with the metal foil into a vacuum system and carrying out annealing treatment; (4) introducing carbon-containing gas and reacting for 30 to 60 minutes; after cooling, forming the multilayered graphene on the surface of a copper foil. According to the method disclosed by the invention, the copper-based graphene grows by adopting a low-pressure vapor phase deposition method, the safety is good and the growth speed is high; the outer surface of the bracket is covered with one layer of the metal foilso that the catalytic decomposition efficiency of the carbon-containing gas can be improved and the concentration of carbon atoms is increased; meanwhile, the evaporation of the copper foil substrateis inhibited and the multilayered graphene is easy to form. The method disclosed by the invention is simple and easy to operate; the outer-layer coated metal foil can be repeatedly utilized and additional energy consumption is not increased; the high-quality and high-multilayer-rate graphene can be formed.

The invention provides an impulse-type bionic power device based on a single-component fuel. The device mainly consists of a fuel supply system and an impulse-type reaction system, wherein the fuel supply system is used for realizing storage and flow regulation and control of single-component fuels; the single-component fuels sequentially pass through an inlet high-frequency switch valve and a catalyst bed of the impulse-type reaction system and are decomposed from a liquid state into a gas state under the action of a catalyst, so that the internal pressure of the catalyst bed increases rapidly; the whole process can be divided into three stages, namely an input stage, a reaction stage and a spraying stage; during the input stage, the inlet high-frequency switch valve is opened, and an outlet high-frequency switch valve is closed; during the reaction stage, the inlet high-frequency switch valve and the outlet high-frequency switch valve are closed; during the spraying stage, the outlet high-frequency switch valve is opened, and the inlet high-frequency switch valve is closed. The device is capable of obtaining the flow of a flow pump and parameter values such as PWM control signal duty ratio of the inlet high-frequency switch valve and the outlet high-frequency switch valve by use of formulae of thermodynamics and hydromechanics according to the output force requirement, and generating a continuous impulse spraying effect. The impulse-type bionic power device has the advantages of high power density, environmental friendliness, simple structure, high efficiency and the like, and is applicable to power systems of devices such as exoskeleton robots and jet packs.

The invention provides a preparation method of a filtering material possessing desulphurization efficacy, which comprises the following steps: 1)active metal catalyst powder and PTFE resin powder are mixed and respectively prepared to catalyst-containing PTFE fiber and catalyst-containing PTFE micropore film; 2) catalyst-containing PTFE fiber and high-strength PTFE fiber employs an alternative arrangement mode with 1-10: 1-10 to prepare warp beam, a PTFE base cloth layer is prepared by employing a machine knitting mode; 3)the base material and catalyst-containing PTFE fiber are mixed, and then placed in a needle loom with the PTFE base cloth layer to prepare PTFE composite needled felt; 4)an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixing treatment fluid, the PTFE composite needled felt is performed with integral dipping treatment and sintered at temperature of 280-350 DEG C; and 5)the sintered PTFE composite needled felt and the catalyst-containing PTFE micropore film are simultaneously introduced into a heat film covering machine, and the surface is performed with hot pressing and laminating. According to the invention, filtration accuracy as well as desulphurization efficiency can be greatly increased.

The invention discloses a fresh air handling unit with purification, sterilization and disinfection functions and a purification, sterilization and disinfection process thereof. The fresh air handling unit comprises an air inlet chamber, a gas purifying chamber, a gas heating and disinfecting chamber, a gas mixing chamber, a fan chamber and an air outlet chamber from bottom to top. Air inlets are formed in the four side walls of the air inlet chamber, and a filter screen mounting opening is formed in one side of the gas purifying chamber. A filter screen sealing element is arranged outside the filter screen mounting opening. A gas purification filter screen is mounted in the gas purifying chamber, heat insulation layers are arranged on the four side walls of the gas heating and disinfecting chamber, heating plates are mounted in the gas heating and disinfecting chamber, catalytic ceramic particles are filled between the heating plates, and a porous partition plate is mounted at the top of the gas heating and disinfecting chamber. An air supplementing opening is formed in the opposite side wall of the gas mixing chamber, an air supplementing adjusting plate is arranged outside the air supplementing opening, and a gas mixing fan is installed in the gas mixing chamber. The fresh air handling unit with the purification and disinfection functions can effectively remove particulate matter, VOC and other harmful gases in the air, kill bacteria, viruses and other microorganisms in the air, purify and disinfect the air and can also be used for heating in winter.

The invention provides a composite metal catalyst for an online hydrocarbon removal instrument and a preparation method of the composite metal catalyst. The method is used for solving the technical problem of low catalytic efficiency of hydrocarbon substances of an online hydrocarbon removal instrument in the prior art. The method comprises the following steps of: S1, dissolving a template, Pd(NO3)2.6H2O and RuCl3.3H2O in a solvent I, and adding an alkaline solution to obtain a mixture; performing heating and separating to obtain a solid I; S2, adding the solid I, CTMAB, TEOS and a solvent IIinto a container, adding a precipitant for reaction, performing separation to obtain a solid II, and calcining the solid II to obtain PdxRuy/SiO2 nanoparticles; and S3, treating the PdxRuy/SiO2 nanoparticles, MCM-22 and water to obtain a molecular sieve water slurry, covering the surface of a carrier with the molecular sieve water slurry, performing drying, and conducting calcining to obtain the composite metal catalyst. The technical scheme of the invention is implemented, precious metals Pd and Ru are used as active components and are uniformly mixed with SiO2 and an MCM-22 molecular sieve,finally, the mixture is uniformly coated on the surface of a zeolite carrier to prepare the PdxRuy/SiO2/MCM-22/Zeolite composite metal catalyst, so that the catalytic decomposition efficiency of the online hydrocarbon removal instrument is effectively improved.

The invention discloses a supported catalyst preparation method, which comprises: heating a mixture of an active component, a catalyst carrier and a pore-forming agent, wherein the heating temperatureis higher than the boiling point of the pore-forming agent. According to the invention, with the preparation method, the macroscopic form of the supported catalyst can be changed, the macroscopic form of the particles of the supported catalyst can be controlled, and the internal microcosmic form can be affected.