162 results about "Honeycomb ceramic" patented technology

The invention discloses a preparation method of high-performance cordierite DPF honeycomb ceramic, and belongs to the technical field of honeycomb ceramic carrier preparation. The preparation method comprises the following steps: mixing raw materials; kneading mud; performing extrusion molding; drying and shaping; cutting and firing to obtain a cordierite honeycomb ceramic carrier; and performing boundary dimension processing, film covering, hole dotting, mud scraping and drying to obtain a finished product. According to the invention, aluminum hydroxide is adopted to replace or partially replace aluminum oxide in the formula of the cordierite porous ceramic structure while magnesium hydroxide is used, and the two substances can form a synergistic heat absorption mechanism by virtue of the difference of the aluminum hydroxide and magnesium hydroxide in thermal decomposition temperature, so that the heat absorption efficiency of the cordierite porous ceramic structure is greatly improved in the low-temperature coke discharge stage of a carrier mud blank. Aluminum hydroxide is subjected to a decomposition reaction before magnesium hydroxide, and then magnesium hydroxide is continuously decomposed at a higher temperature, so that the temperature range covered by the whole heat absorption process is greatly widened, the heating rate of the carrier mud blank is effectively slowed down, and thermal shock caused by sudden rising of local temperature is avoided.

The invention relates to the field of catalysts. The invention relates to a catalyst for catalytic oxidation of carbon monoxide in industrial sulfur-containing flue gas. A carrier is a cordierite honeycomb ceramic carrier coated with activated aluminum oxide (Al2O3), silicon oxide (SiO2) or titanium oxide (TiO2), or a honeycomb carrier with titanium oxide as a skeleton; the noble metal active component is selected from one or a combination of more of palladium (Pd), platinum (Pt) and rhodium (Rh), the total loading capacity accounts for 0.05-0.4 wt% of the mass of the carrier, and the noble metal component is loaded on the surface layer of the carrier at the depth of 10-300 microns and is of an eggshell type distribution structure; the cocatalyst component is selected from one or a combination of more of vanadium oxide (VO), tungsten oxide (WO), cerium oxide (CeO), molybdenum oxide (MoO) and lanthanum oxide (La2O3) and is uniformly distributed on the carrier. Unification of activity, stability and economical efficiency of the catalyst is achieved, the problems that a catalytic oxidation catalyst is prone to inactivation, low in activity and high in cost in complex sulfur-containing flue gas are solved, and the industrial application value is remarkable.

The invention discloses toughened honeycomb ceramic as well as a preparation method and application thereof. The toughened honeycomb ceramic is prepared by mixing, kneading, refining, drying and sintering a mixed ceramic raw material and an additive, the additive accounts for 4-12wt% of the weight of the mixed ceramic raw material, and the additive comprises yttrium-stabilized zirconia and nickel-titanium memory alloy in a mass ratio of (1-3): (1-3). According to the method, plastic deformation of the memory alloy is induced by utilizing the volume change of the instantaneous phase change of the yttrium-stabilized zirconia when the crack is generated, and the damage accumulated in the ceramic at the low-temperature stage can be partially recovered by utilizing the memory effect and the hyperelastic effect of the memory alloy. And a dual protection mechanism of instantaneous energy consumption and hysteresis recovery is constructed, and the damage resistance and toughness of the material are remarkably improved.

The invention provides a high-porosity honeycomb pore ceramic bond grinding tool forming device, and belongs to the technical field of semiconductor hard and brittle material precision machining, the high-porosity honeycomb pore ceramic bond grinding tool forming device comprises a mold, a forming groove is formed in the upper surface of the mold, the forming groove penetrates through the mold, and grinding tool slurry is injected into the forming groove; the grinding tool slurry is arranged to form a gel body in the forming groove, and the gel body is self-tightened downwards; the absorption layer abuts against the lower surface of the mold and is used for absorbing moisture in the gel body so that the gel body can be rapidly self-tightened downwards; and the temperature regulation and control module is used for heating the absorption layer to promote rapid evaporation of the moisture absorbed by the absorption layer, so that the absorption layer can continuously absorb the moisture in the gel. The problem that in the related technology, the blank curing forming time is long is effectively solved.

The application discloses a precious metal embedded porous carbon coated honeycomb ceramic monolithic catalyst and application thereof. The liquid phenolic resin polymer containing chloroplatinic acid is uniformly coated on the surface of the cordierite honeycomb ceramic through impregnation treatment; in an oxygen-nitrogen mixed atmosphere, one-stage solidification makes the liquid phenolic resin polymer containing chloroplatinic acid coated on the surface of the cordierite honeycomb ceramic completely solidified; two-stage calcination makes oxygen react with chloroplatinic acid, so that the chloroplatinic acid is decomposed, and the negative influence of chloride ions on the catalyst is eliminated; in an inert gas argon atmosphere, carbonization makes the phenolic resin polymer carbonize under high-temperature conditions to form porous carbon, and meanwhile, platinum ions are reduced to platinum single elements and embedded by the porous carbon, so that the precious metal (platinum, iridium) embedded porous carbon coated honeycomb ceramic monolithic catalyst is finally prepared.

The invention relates to the technical field of grinding in material engineering, and discloses a high-porosity honeycomb pore ceramic bond grinding tool and a preparation method and application thereof.The preparation method of the mold comprises the following steps that S1, a solvent, a gelatinizing agent, a ceramic bond, a pore forming agent and a grinding material are pretreated to prepare sol slurry; s2, after gel treatment, the sol slurry forms a gel body, pore-forming agents in the gel body are mutually adsorbed through self-tightening treatment, gaps between the pore-forming agents are filled with a ceramic bonding agent and an abrasive material, and a grinding tool blank is obtained; and S3, the grinding tool blank is subjected to firing process treatment, and the target grinding tool is obtained. According to the preparation method disclosed by the invention, the pore-forming agent is used as a template, and the ceramic bond grinding tool prepared by a process method of stacking and self-assembling an in-situ gel casting mold through the pore-forming agent has the advantages of high porosity, high macro porosity, uniform pore size and uniform distribution, and has good mechanical properties and grinding properties such as cooling and chip containing.

The invention discloses a preparation method of a ceramic reinforced metal matrix composite material based on atomic layer deposition coating. The preparation method comprises the following specific steps: 1, pretreatment of ceramic particles: surface cleaning, roughening treatment and surface activating treatment; 2, ceramic particle surface atomic layer deposition coating: preheating, precursor gas introduction, inert gas purging, oxygen source supply, inert gas secondary purging, cooling and annealing; and 3, preparation of the ceramic reinforced metal-based composite material: preparing a honeycomb-shaped ceramic prefabricated body, and pouring molten metal to obtain a ceramic reinforced metal-based composite material product. The atomic layer deposition technology is utilized, Al2O3, Ni or TiO2 films are deposited on the surfaces of the ceramic particles to improve the interface bonding force between the ceramic particles and the matrix, the surface films are uniform and compact, meanwhile, the thickness of the films can be accurately controlled, the wettability between the ceramic particles and the metal matrix is effectively improved, and the ceramic particles can be prepared. And the interface bonding force between the metal matrix and the ceramic particles is obviously improved.

The application provides a monolithic catalyst for propane combustion, which comprises a square cordierite honeycomb ceramic carrier and a double-layer coating coated on the carrier, the square cordierite honeycomb ceramic has controllable pore size; the coating comprises active components Pt and Pd, the active components are loaded on modified composite alumina, the modified composite alumina has a composition of MO x -Al2O3; the mass ratio of the noble metals Pt and Pd is 1:(0.2-2); the weight proportion of the noble metals in the coating material is 1-5%. Through detection, the catalyst obtained by the technical scheme has a significantly improved purification efficiency for propane, and the purification efficiency after 8000h can reach or exceed 96%, and the catalyst has a high propane purification efficiency; after the catalyst is hydrothermally aged for 100h at 850 DEG C with 10% H2O, the purification efficiency for propane at 550 DEG C can still reach or exceed 97%, and the catalyst shows good high-temperature hydrothermal stability.

The application discloses honeycomb ceramic and a preparation method thereof. A composite additive is added into mixed ceramic raw materials, and the weight ratio of the mixed ceramic raw materials to the composite additive is (30-50):(50-70). The composite additive comprises 30-54 parts of flaky alumina, 2-10 parts of nano-zinc oxide and 1-5 parts of metal molybdenum particles. The honeycomb ceramic is prepared through ball milling, kneading, refining, extrusion forming, drying and sintering. The application replaces bauxite with flaky alumina, adds beneficial additives, i.e. nano-zinc oxide and metal molybdenum particles, and uses the original extrusion forming equipment to realize the layered structure of the flaky alumina, thereby building a shell-like pearl layer structure with the layered alumina as a "brick", the metal molybdenum particles as "mud" and the zinc-aluminum spinel particles as "protrusions".

The invention discloses a rhizoma polygonati flavone extraction system and process, and relates to the technical field of rhizoma polygonati component extraction, and the process comprises the following steps: selecting rhizoma polygonati tubers, grading the rhizoma polygonati tubers, and respectively carrying out flavone extraction pretreatment and flavone extraction treatment on each grade of raw materials, the polygonatum kingianum tubers with the same total segment number are divided into the same age limit group; the polygonatum sibiricum tubers in all the groups with the same age limit are split along the joint of the segments, and all the split segments are numbered; randomly selecting a certain proportion from the numbered raw material sections as a sample for flavone content detection, and taking an arithmetic mean value as a flavone nominal content of the raw material section; and performing multi-stage raw material division according to the flavone nominal content of each raw material section. According to the process, the dissolution rate and the purity of flavone are improved, an extraction system matched with the process enables all levels of raw materials to be orderly treated according to levels, and the industrialization value and the product competitiveness of polygonatum sibiricum flavone extraction are improved.

The invention discloses a movable electric heat storage device which comprises a container. The heat storage device is arranged in the first mounting area in the container, and the heat storage device comprises a plurality of honeycomb ceramic heat accumulators and a heater in heat conduction connection with the honeycomb ceramic heat accumulators; the power distribution device is arranged in the second mounting area in the container, electrically connected with the heater and used for being connected with an external power source and supplying power to the heater; the heat exchange device is arranged in the third mounting area in the container and comprises a heat exchanger and a circulating pump, the heat exchanger is in heat conduction connection with the honeycomb ceramic heat accumulators through heat conduction pipes, and the circulating pump is used for controlling flowing of working media in the heat conduction pipes; the power interface and the thermal interface are arranged on the side wall of the container, the power interface is electrically connected with the power distribution device, and the thermal interface is connected with the heat exchanger. The mobility and rapid deployment of heat storage equipment are achieved, and meanwhile efficient and stable heat energy storage and release are achieved through the solid heat storage technology.

The utility model relates to the technical field of ceramic products, in particular to a slotted hole honeycomb ceramic heat accumulator which comprises a supporting outer frame and slotted holes formed in the supporting outer frame. The supporting outer frame comprises 1-3 rows of rectangular holes arranged around the slotted hole in the radial direction. The cross-sectional area of the rectangular hole is at least less than half of the cross-sectional area of the slotted hole; a plurality of slotted hole bulges are arranged in each slotted hole; a clamping groove protrusion is arranged on the outer side of the supporting outer frame. The clamping groove protrusions between the adjacent slotted hole honeycomb ceramic heat accumulators define splicing holes. The slotted hole honeycomb ceramic heat accumulator has the advantages that after the slotted hole honeycomb ceramic heat accumulator is assembled through the clamping groove protrusions, vent holes of a certain size are reserved between the outer walls, and the rectangular holes of the supporting outer frame enable the structure of the supporting outer frame to be more stable and firmer. The design of the clamping groove protrusions and the groove holes of the supporting outer frame enables the gas distribution capacity in the heat accumulator to be kept, the defect that local pressure drop is too high is overcome, and the heat efficiency of the system is improved.

The utility model discloses a honeycomb ceramic carrier support for an automobile exhaust purifier, which relates to the technical field of automobile exhaust purification equipment and comprises a cylindrical support, a plurality of groups of trapezoidal plates are fixedly mounted on the inner wall of the cylindrical support, and a plurality of groups of elastic cushions are arranged in the cylindrical support. And three groups of buffer springs are fixedly mounted at one end of each group of trapezoidal plates. According to the utility model, the arc-shaped supporting blocks connected with the buffer springs are arranged on the inner wall of the cylindrical bracket, and the elastic buffer pads are arranged on the inner arc surfaces of the arc-shaped supporting blocks, so that the honeycomb ceramic carrier can be stably supported and effectively damped, and the influence of vibration and impact on the honeycomb ceramic carrier in the running process of an automobile is reduced; and secondly, the semicircular baffles are installed at the two ends of each set of arc-shaped supporting blocks, the two ends of the honeycomb ceramic carrier can be limited, the two ends of the honeycomb ceramic carrier can be fixed conveniently, and the honeycomb ceramic carrier is prevented from moving in the cylindrical support.

The invention discloses an indoor hydrogen elimination device, and relates to the technical field of indoor hydrogen elimination, the indoor hydrogen elimination device comprises a hydrogen elimination mechanism, a gas inlet mechanism is arranged on the left side of the hydrogen elimination mechanism, a condensation mechanism is arranged on the right side of the gas inlet mechanism, and the left side of the condensation mechanism is matched with the right side of the hydrogen elimination mechanism; the hydrogen elimination mechanism comprises a shell, an inner container is arranged in the shell, an insertion block is fixedly connected to the bottom of the inner wall of the inner container, a plurality of carrier plates are inserted into the insertion block and are made of cordierite honeycomb ceramics, the tops of the carrier plates are fixedly connected with the same fixing plate, and the same fixing plate is fixedly connected with the inner wall of the inner container. The top of the fixing plate is attached to the top of the inner wall of the inner container, and the right side of the shell is fixedly connected with an air outlet. According to the indoor hydrogen elimination device, gas is evenly mixed through the spiral flow guide fins, hydrogen and oxygen in the gas are subjected to a surface chemical reaction under the action of a palladium catalyst for hydrogen elimination, and water vapor is cleaned through a condensation plate.

The invention discloses honeycomb ceramic skin slurry, a preparation method thereof and a honeycomb ceramic filter, and belongs to the field of honeycomb ceramic materials. According to the technical scheme, the silicon carbide grinding waste comprises 40-60% of silicon carbide grinding waste, 5-15% of wollastonite and 13-25% of silica sol. The silicon carbide grinding waste comprises silicon carbide, metal silicon and silicon dioxide; the porosity of the silicon carbide grinding waste is 50% or above, and the BET specific surface area is larger than 0.8 m < 2 > / g. The method is applied to the aspect of honeycomb ceramic filters, the problems that existing honeycomb ceramic skin slurry is long in drying time, waste generated in the production process of a silicon carbide honeycomb ceramic body is complex to treat, and the treatment cost is increased are solved, rapid drying can be achieved, the drying efficiency is high, and meanwhile resource utilization of solid waste can be achieved.

The invention relates to the technical field of solid oxide fuel cells, in particular to a honeycomb ceramic catalyst for hydrogen production by reforming natural gas water, a preparation method and application. Comprising an ultrahigh-pore-density honeycomb ceramic carrier and a composite active catalytic layer coated on the pore channel wall of the ultrahigh-pore-density honeycomb ceramic carrier, the mesh number of the ultrahigh-pore-density honeycomb ceramic carrier is 10000-40000, and the composite active catalytic layer comprises metal active components, modified aluminum oxide and cerium-zirconium oxide. The catalyst has high catalytic activity by adopting an ultrahigh-pore-density honeycomb ceramic carrier, the utilization rate of active components is improved by a porous structure of the coating, a natural gas water reforming hydrogen production reaction can be quickly started, the hydrogen production efficiency is improved, and the methane conversion rate at 650 DEG C reaches 75% or above.

The application discloses a low-temperature toughened honeycomb adiabatic catalytic component and a preparation method and application thereof, and belongs to the technical field of new energy catalytic materials. The component is based on cordierite, is compounded with 3Y stable zirconium oxide, nano-aluminum oxide and a low-temperature borosilicate glass composite system, is formed by low-temperature segmented sintering at 1280 DEG C, and stainless steel fiber doping is abandoned, so that the toughness of the matrix is significantly improved. A gamma-Al2O3 composite transition layer and a Cu-Mn-Ce-Zr-La non-noble metal catalytic active double-layer coating are arranged on the inner wall of the pore, the coating has strong bonding force and high specific surface area. The application solves the problems of traditional honeycomb ceramic high-temperature sintering, high-temperature failure of metal reinforcing phase, weak low-temperature catalytic activity, easy peeling of the coating and the like, and the preparation process is simple and easy to mass produce. The product is suitable for coal underground in-situ gasification 180-280 DEG C low-temperature halogen adiabatic catalytic working conditions, is used for flue gas reforming, hydrogenation cracking and oil component regulation, has the advantages of low cost, thermal shock resistance, long-term stability and the like, and has strong industrial practicability.

This utility model discloses an ultra-high temperature flue gas purification device for steelmaking, including a shell and an inlet pipe. The interior of the shell is divided into a spiral dust collection chamber and a fine filtration chamber by a partition. The inlet pipe is tangentially connected to the spiral dust collection chamber. Multiple vertical cylinders are concentrically arranged in the fine filtration chamber. The upper end of each vertical cylinder is sealed to the top of the shell, and the lower end is sealed to the partition. Several horizontal pipes are evenly distributed on the side wall of each vertical cylinder, and honeycomb ceramics are installed inside the horizontal pipes. An exhaust pipe is provided on the side wall of the fine filtration chamber. An upper air pipe is provided on the vertical center line of the fine filtration chamber, and the lower end of the upper air pipe passes through the partition and connects to the spiral dust collection chamber. Ring pipes are provided at the bottom of the annular space between two adjacent vertical cylinders and at the bottom of the innermost vertical cylinder. A dust suction port is provided at the bottom of the ring pipe, and a dust suction pipe extending out of the fine filtration chamber is provided on the ring pipe. In summary, this utility model has the advantages of low processing cost, high working efficiency, and good dust removal effect.

The invention belongs to the technical field of ceramic cutting, and discloses a cutting device for producing silicon carbide honeycomb ceramics, which comprises a workbench, a transmission mechanism is fixed at the top end of the workbench, the transmission mechanism comprises a guide frame, a bottom plate and a support frame, the guide frame is fixed at the top end of the workbench, and the bottom plate is fixed at the top end of the workbench. According to the silicon carbide honeycomb ceramic cutting device, through cooperation of the guide frame, the bottom plate, the supporting frame and other structures, stable conveying and precise cutting of silicon carbide honeycomb ceramic can be achieved, the situation that the cut ceramic falls off and is damaged is avoided, the guide frame provides guidance for ceramic conveying, a first servo motor drives a screw to drive the supporting frame to move, and the supporting frame is driven to move; and then the first feeding plate pushes the ceramics to move towards the cutting area, the first air cylinder pushes the second feeding plate to be matched with the first feeding plate to clamp the ceramics, it is guaranteed that the ceramics are stable during cutting, the cut ceramic pieces are supported by the second feeding plate, direct toppling and breaking are avoided, and the product integrity is guaranteed.

The present invention provides a ceramic unit body, a honeycomb ceramic carrier and a preparation method therefor, and an exhaust catalytic substrate core, wherein two ends of the ceramic unit body define a gas inlet end and a gas outlet end, respectively, and the ceramic unit body has a plurality of compartments separated by partition walls and extending in a longitudinal direction of the ceramic unit body; the compartments comprise first compartments and second compartments alternately arranged in a cross section in the ceramic unit body, the first compartments being open on a gas inlet end side and blocked on a gas outlet end side, and the second compartments being blocked on a gas inlet end side and open on a gas outlet end side; wherein the partition walls are provided with a plurality of pores connecting the first compartments and the second compartments; and an average pore diameter of openings of the pores on a first compartment side is Di, an average pore diameter of openings of the pores on a second compartment side is Do, and Di<Do. The ceramic unit body and honeycomb ceramic carrier provided by the present invention can improve exhaust gas purification efficiency.

According to the skin grafting device and method for the silicon carbide honeycomb ceramic carrier, high-quality and high-efficiency skin grafting of the silicon carbide honeycomb ceramic carrier can be achieved, meanwhile, dependence on manpower is reduced, the product consistency and the production efficiency are improved, and the production cost is reduced. The rotary driving assembly is used for bearing the silicon carbide honeycomb ceramic carrier and driving the silicon carbide honeycomb ceramic carrier to rotate; the top pressing assembly is used for pressing the silicon carbide honeycomb ceramic carrier from the top; the blade coating assembly is used for scraping and trimming pug coated on the surface of the silicon carbide honeycomb ceramic carrier; the skin grafting template and the floating clamping mechanism are matched to be clamped at the two ends of the silicon carbide honeycomb ceramic carrier, the skin grafting template is used for limiting the skin grafting outer diameter of the silicon carbide honeycomb ceramic carrier, and the floating clamping mechanism can conduct self-adaptive adjustment on radial run-out of the silicon carbide honeycomb ceramic carrier during rotary machining.

The application relates to the technical field of catalysts, and discloses a monolithic catalyst for catalytic oxidation of bromine-containing volatile organic compounds and a preparation method and application thereof.The method comprises the following steps: (1) first mixing silica nanoparticles and pseudo-boehmite I in the presence of solvent I to obtain a first mixed material, and second mixing alumina and pseudo-boehmite II in the presence of solvent II to obtain a second mixed material; (2) third mixing a copper source, a manganese source, the first mixed material and the second mixed material to obtain a third mixed material; and (3) impregnating treatment of a honeycomb ceramic in the third mixed material, and sequentially performing drying and calcination on the obtained product to obtain the monolithic catalyst.The monolithic catalyst obtained by the method has an even and smooth edge, a higher loading capacity, better dispersity of active components and better stability of the catalyst.

The invention relates to the field of bread baking machinery, in particular to bread processing baking equipment which comprises a baking equipment body, a rectangular box door hinged to the outer surface of the front end of the baking equipment body and a control module arranged on the outer surface of the front end of the baking equipment body. The inner wall of the heating pipe is fixedly connected with a first heating resistor, and the outer surface of the lower end of the heating pipe is fixedly connected with a honeycomb ceramic module; according to the bread baking device, through the innovative collaborative design of the honeycomb ceramic module and the filtering structure, the processing efficiency of flour particles and grease flying objects in the bread baking process is remarkably improved, specifically, a multi-stage filtering and adsorbing system is adopted, and the flying objects firstly pass through a stainless steel metal filter screen to intercept large-particle dust; and then fine particles and oil mist are adsorbed through a micropore structure of honeycomb ceramic molecular sieve particles, and the filtering efficiency can reach 90% or above.

The utility model discloses a microtubular reactor and system based on modified honeycomb ceramic ozone catalyst, microtubular reactor includes liquid inlet cylinder, reaction cylinder and liquid outlet cylinder that connect in proper order, liquid inlet cylinder outer end and liquid outlet cylinder outer end are both plugged, liquid inlet cylinder, reaction cylinder and liquid outlet cylinder are communicated in proper order, liquid inlet cylinder outer end and liquid outlet cylinder outer end are sealed. The liquid inlet cylinder, the reaction cylinder and the liquid outlet cylinder form a closed structure, an inner module made of modified honeycomb ceramics is arranged in the reaction cylinder, the liquid inlet cylinder is fixedly connected with a wastewater inlet pipe and an ozone inlet pipe, and the liquid outlet cylinder is connected with an outlet pipe. And the length or the number of the reaction cylinders can be correspondingly adjusted according to actual requirements (such as treatment capacity, treatment speed and treatment effect), so that the reaction device can adapt to different treatment requirements. And the inner module can be replaced, so that the operation cost of the utility model can be reduced.

The utility model discloses a tooth-shaped honeycomb ceramic filter component, which relates to the technical field of ceramic filtration and comprises two main bodies arranged side by side, the main bodies are tank-shaped, the top surfaces of the main bodies are provided with top covers, the bottom ends of the main bodies are in threaded connection with a base, two sides of the base are communicated with pipelines through connecting components, and a plurality of fixing blocks are uniformly arranged on the peripheral side of the bottom end of the base; according to the utility model, the threaded hole in the mounting seat is in threaded connection fit with the tooth-shaped honeycomb filter element, so that the filter element is conveniently and accurately mounted and stably fixed, the accuracy and the stability of the mounting of the filter element are improved, and the function of stably working the filter element under a complex working condition can be further realized; the filter element is conveniently and accurately positioned during installation, the accuracy of the installation position of the filter element is improved, the problem that the filter efficiency and quality are reduced due to the fact that an existing buckle frame structure is prone to loosening and displacement when used for fixing the filter element is finally solved, and the filter effect and the operation stability of the filter assembly are improved.

The invention provides a high-porosity honeycomb pore ceramic bond grinding tool forming device, and belongs to the technical field of semiconductor hard and brittle material precision machining. A mold is provided with a forming groove penetrating through the upper surface and the lower surface of the mold, and sol slurry is injected into the forming groove; the sol slurry is prepared by pretreating a solvent, a gelatinizing agent, a ceramic bonding agent, a pore forming agent and an abrasive material, and the sol slurry is subjected to gel treatment in the forming groove to form a gel body; and the downward pressing assembly is arranged above the mold and used for applying downward pressure to the gel in the forming groove from the upper portion, and the pressure is used for compensating transverse shrinkage deformation of the gel in the self-tightening treatment process. The problems of side wall adsorption, tearing and pores possibly occurring when the gel body is rapidly self-tightened downwards are effectively solved.

The present application relates to a kind of preparation methods of silicon-based silicon carbide DPF, using gas furnace to carry out oxygen firing, steps include by selecting specific particle size silicon carbide powder, silicon powder and appropriate amount of auxiliary, material is kneaded into plastic clay and is shaped into honeycomb ceramic monomer, and carries out drying, oxygen degassing and firing etc. After the monomer of firing is completed, high-pressure grouting mode is used, and the splicing material prepared from inorganic silica gel and silicon carbide powder is used to splice the monomer into different specifications of splicing body. After splicing body is dried and hardened, it is processed into cylinder with smaller diameter than finished product, and outer skin is made on its side. Finally, the required hole plugging effect is achieved by laser drilling combined with screen printing test hole plugging, and the preparation of silicon-based silicon carbide DPF product is completed. The preparation method of the present application can effectively prevent the oxidation of silicon powder during firing, improve the performance of silicon-based silicon carbide DPF, simplify the process flow, reduce the preparation cost, and be easy to realize industrial production.

The invention discloses a palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst as well as preparation and application thereof. The preparation method of the catalyst comprises the following steps: stirring and mixing phenol, a formaldehyde aqueous solution and sodium hydroxide, then adding a solution containing a palladium source, and polymerizing to obtain a phenolic resin reaction solution containing palladium; then immersing the cordierite honeycomb ceramic in a phenolic resin reaction solution containing palladium for 8-16 hours, taking out the cordierite honeycomb ceramic, blowing away redundant phenolic resin in pore channels of the cordierite honeycomb ceramic, then carrying out first-stage curing and second-stage roasting on the honeycomb ceramic in a nitrogen-oxygen mixed atmosphere, and then carrying out high-temperature carbonization in a nitrogen atmosphere, so as to obtain the catalyst. And cooling to obtain the palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst. The invention provides an application of the palladium-inlaid porous carbon-coated honeycomb ceramic monolithic catalyst in a selective catalytic hydrogenation reaction of chloronitrobenzene to generate chloroaniline. The catalyst provided by the invention has the advantages of low loading capacity, low cost and high stability.

The invention relates to the technical field of solid oxide fuel cells, in particular to an integral honeycomb ceramic catalyst for hydrogen production by partial oxidation reforming of propane, a preparation method and application. The pore walls of the silicon carbide honeycomb ceramic carrier are coated with catalyst slurry through negative pressure driving, and the monolithic honeycomb ceramic catalyst is obtained after drying and roasting. The catalyst slurry comprises a noble metal precursor and a composite carrier, the noble metal precursor comprises platinum and palladium, and the composite carrier comprises nano cerium oxide and gamma-aluminum oxide. The micro-channel type integral honeycomb ceramic is used as a carrier, so that the specific surface area can be greatly increased, the uniform distribution of active substance sites in the composite active catalyst layer is facilitated, and the conversion rate and the reaction rate of partial oxidation reforming reaction of propane are improved.

The utility model discloses a device of plasma compound ozone treatment water, the utility model discloses when using, the oxygen in oxygen source enters plasma generator and generates generating oxygen plasma, and oxygen plasma and ozone mix in pipeline mixer, after mixed gas enters high pressure gas dissolving jar with the liquid in the jar and mixes, again through venturi jet device enters each honeycomb ceramic aeration disc to generate nanometer gas bubble in the reaction tower to the effective treatment of sewage to the double application of oxygen plasma and ozone, can effectively improve the treatment efficiency of organic pollutant.