KR20110004302A - Porous substrate for chemical reactor, chemical reactor using the same and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A porous carrier for a reactor, the reactor using thereof, and a producing method thereof are provided to for nano-scale micro pore structures on the porous carrier by electro-spinning a spinning solution as a nanofiber web. CONSTITUTION: A producing method of a porous carrier for a reactor including a catalyst supporter comprises the following steps: melting a fiber forming polymer to a solvent(S11); adding a metal or a ceramic precursor with an additive to the polymer solution to make a spinning solution(S12); spinning the spinning solution to the porous carrier or a wire mesh as a base carrier, to form a nanofiber web(S13); and high-temperature sintering the base carrier to remove organic materials from the ceramic precursor.(S16).

Description

Porous carrier for reactor, reactor using same and manufacturing method therefor {Porous Substrate for Chemical Reactor, Chemical Reactor Using the Same and Method for Manufacturing the Same}

The present invention relates to a porous carrier for a reactor, a carrier using the same, and a method for manufacturing the same. Particularly, the present invention relates to a nanoparticle through sintering after electrospinning a spinning solution containing a metal and / or a ceramic precursor and a polymer material in the pores of the porous base carrier. The present invention relates to a porous carrier for a reactor having a catalyst support having a large surface area by forming a fine pore structure in scale units, a reactor using the same, and a method of manufacturing the same.

The household food waste treatment device generates a large amount of exhaust gas including the odor generated during fermentation and decomposition processing of organic matter that occupies most of the food waste. Therefore, in the case of a mobile type, a deodorization device for deodorizing the odor is essential to the exhaust part. In case of fixed type, the discharge gas is discharged through the sewer.

Conventional deodorizers are microbial deodorization method using microorganisms, activated carbon adsorption method using activated carbon, oxidation catalyst combustion method using an oxidation catalyst and the like.

In the deodorization method using the oxidation catalyst, the odor is removed by passing the exhaust gas through a honeycomb carrier having a plurality of hollow cell structures coated with a catalyst. In this case, the catalyst is provided with a heater in the deodorizing apparatus so as to effectively react with the substance causing the odor, and the carrier of the catalyst is heated to the catalyst active temperature. Deodorization method using such a catalyst can be used semi-permanently, it can be applied where the processing capacity is high because the processing speed is high.

In addition, the exhaust gas emitted from the gasoline vehicle contains harmful substances such as carbon monoxide (CO) and nitrogen oxides (NOx), and exhausted at the rear of the exhaust manifold of the vehicle to remove and remove these harmful substances in a completely combustion manner. A carrier converter for gas purification is provided.

Furthermore, in diesel vehicles, particulate matter (PM), such as smoke, is discharged relatively more than gasoline vehicles, and thus a smoke reduction device for purifying exhaust gas and purifying exhaust gas is used.

The smoke reduction device for reducing the smoke of diesel vehicles also includes a catalyst support formed on the porous support and a catalyst converter coated with an oxidation catalyst on the catalyst support to filter the smoke and at the same time, a carbon component contained in the exhaust gas. Soot and nitrogen oxides (NOx) are oxidized and regenerated at high temperatures.

The carrier converter using the oxidation catalyst is prepared by coating fine ceramic particles on the surface of a thin metal plate or a porous ceramic carrier as a catalyst carrier to form a catalyst support having a large surface area and then coating the catalyst. When the catalyst support is formed on the thin metal plate, a process of winding the catalyst support to form a honeycomb structure is required.

Conventional techniques for forming a catalyst support are disclosed in Japanese Laid-Open Patent Publication No. 7-171421 for the purpose of improving resistance to thermal shock by immersing a surface of aluminum-containing ferrite stainless steel in a slurry solution made by dispersing fine ceramics in water. By coating a catalyst support ceramic particles on the surface of the metal carrier to dry and calcination treatment is disclosed a wash coat (wash coat) method. However, this method has a weak pretreatment condition of the metal surface, and the treatment condition of the coating solution is not sufficient, so that the cracking occurs seriously on the surface after coating.

In addition, Japanese Patent Laid-Open No. 6-47279 discloses a sol-gel in which a sol solution of a ceramic material to be coated is made, and a thin metal plate or ceramic carrier is repeatedly wetted with a sol solution and dried to coat the sol particles on the surface of the carrier. A coating method is disclosed. However, this coating method is limited in the thickness of the ceramic layer to be coated, there is a problem that cracks or peeling of the coating layer due to thermal shock.

Furthermore, Korean Patent Laid-Open Publication No. 2000-0042383 improves the metal surface treatment conditions before coating ceramic on the catalyst support to improve the adhesion between the catalyst support ceramic layer and the metal base surface, and the dispersion and particle size before coating the ceramic coating solution. A technique for reducing cracking of a coating layer due to heat treatment after coating is disclosed as an improvement of a controlled treatment method.

On the other hand, the catalyst support formed on the surface of the ceramic support and coated with the catalyst is preferable because the surface area on which the catalyst is coated is as wide as possible so as to increase the reaction efficiency of the exhaust gas emitted from the vehicle or the odor gas of the food treatment apparatus.

Conventional ceramic carriers are manufactured by extrusion using cordierite materials, and in this case, it is difficult to control the density of each particle, thereby preventing formation of fine pore structures in nanoscale units.

The present invention has been proposed in order to solve the above problems, and its object is to electrospin a spinning solution containing a metal and / or ceramic precursor and a fiber-forming polymer material into the pores of the porous base carrier in the form of a nanofiber web. After the sintering to form a fine pore structure of the nano-scale unit to provide a porous carrier for a reactor having a catalyst support having a large surface area and a method of manufacturing the same.

Another object of the present invention is to spin the nano-scale unit by electrospinning a spinning solution containing a metal and / or ceramic precursor, a fiber-forming polymer material and a catalyst metal in the form of a nanofiber web inside the pores of the porous base carrier The present invention provides a reactor having a large surface area catalyst coating layer and a method for producing the same, by forming a fine pore structure and simultaneously coating a catalyst.

It is still another object of the present invention to easily control the thickness of the catalyst support layer by directly performing electrospinning on a thin metal plate as a base carrier, and to increase the specific surface area of the nanofibers. It is to provide a porous carrier and a method for producing the reactor that can improve the reaction efficiency compared to the coat) method.

It is another object of the present invention to directly perform electrospinning on a thin metal plate as a base carrier, and then to perform thermal compression to increase the resistance to thermal shock generated in repeated thermal cycles by acting as a buffer in the fiber laminate structure. The present invention provides a porous carrier for a reactor in which no peeling occurs between the catalyst support ceramic layer and the metal thin plate, and a method of manufacturing the same.

Another object of the present invention is to deodorize the exhaust gas through an effective oxidation reaction by forming an Eddy Flow by increasing the contact time with the catalyst coated on the surface of the carrier by forming a three-dimensional fibrous structure. It is to provide a method for producing a catalyst support for a carrier that can improve the purification performance.

The present invention for achieving the above object, the step of dissolving a fiber-forming polymer in a solvent to dissolve, the step of preparing a spinning solution by dissolving a metal or ceramic precursor and additives in the dissolved polymer solution, and the spinning solution obtained Forming a nanofiber web by spinning on a porous carrier or a wire mesh as a base carrier, and removing the organic material contained in the fiber-forming polymer and the precursor by hot sintering the base carrier on which the nanofiber web is formed. It provides a method for producing a porous carrier for the reactor, characterized in that.

According to another feature of the invention, the present invention comprises the steps of dissolving a fiber-forming polymer in a solvent to dissolve, dissolving a metal or ceramic precursor and additives in the dissolved polymer solution to prepare a spinning solution, and obtained spinning solution Radiating a thin metal plate, thermocompressing the nanofiber web spun onto the thin metal plate, and molding the honeycomb structure into a honeycomb structure using the thin metal plate to which the nanofiber web is pressed, and the honeycomb structure It provides a method for producing a porous carrier for a reactor, comprising the step of removing the organic matter contained in the fiber-forming polymer, the precursor by sintering the molded article at high temperature.

According to another feature of the present invention, the present invention comprises the steps of dissolving a fiber-forming polymer in a solvent to dissolve, and preparing a spinning solution by dissolving a metal or ceramic precursor, a catalyst metal and an additive in the dissolved polymer solution; Forming a nanofiber web by spinning the obtained spinning solution on a porous carrier or a wire mesh as a base carrier, and removing the organic material contained in the fiber-forming polymer and the precursor by hot sintering the base carrier on which the nanofiber web is formed. It provides a method for producing a reactor comprising the step.

According to another feature of the present invention, the present invention comprises the steps of dissolving a fiber-forming polymer in a solvent to dissolve, preparing a spinning solution by dissolving a metal or ceramic precursor, a catalyst metal and an additive in the dissolved polymer solution, Spinning the obtained spinning solution onto a thin metal plate, thermocompressing the nanofiber web spun onto the thin metal plate, and forming a honeycomb structure using a thin metal plate on which the nanofiber web is pressed; It provides a method for producing a reactor comprising the step of removing the organic material contained in the fiber-forming polymer, precursor by high-temperature sintering the molded article formed into a honeycomb structure.

The polymer solution preferably contains 5 to 30 wt.% Of the fiber-forming polymer.

In addition, the spinning solution preferably contains 30 to 300% of the metal or ceramic precursor and additives relative to the polymer.

The nanofiber diameter of the spun nanofiber web preferably has a range of 50nm ~ 700㎛.

In addition, the metal precursor is titanium isopropoxide (TIP), lithium acetylacetonate (Lithium Acetylacetonate), manganese acetate tetrahydrate, iron acetylacetonate (iron acetylacetonate), aluminum nitrate nonahydrate and at least one selected from aluminum nitrate nonahydrate, and when the ceramic precursor is oxidized, ceramics of alumina (Al ₂ O ₃ ), zirconia (ZrO ₃ ), ceria (CeO ₂ ), and titanium (TiO ₂ ) are formed. At least one selected from among those can be used.

In addition, the catalyst metal may use at least one precursor selected from platinum (Pt), cobalt (Co), nickel (Ni), palladium (Pd), and nano silver.

In the present invention, a porous carrier for the reactor and the reactor are obtained according to the above production method.

As described above, in the present invention, the spinning solution containing a metal and / or ceramic precursor and a polymer material is electrospun in the form of a nanofiber web in the pores of the porous base carrier to form a fine pore structure in nanoscale units through sintering. Thus, a porous carrier for a carrier converter having a catalyst support having a large surface area is obtained.

In addition, in the present invention, it is easy to control the thickness of the catalyst support layer by directly performing electrospinning on the thin metal plate, and to increase the specific surface area characteristic of the nanofibers, compared to the conventional wash coat method. It can improve the reaction efficiency and act as a buffer in the fiber laminate structure, thereby increasing resistance to thermal shock generated in repeated thermal cycles, thereby preventing peeling between the catalyst support ceramic layer and the metal sheet. do.

Furthermore, in the present invention, the eddy current is formed by the fibrous structure constituting the three-dimensional structure, thereby improving the reaction efficiency by increasing the contact time with the catalyst coated on the surface of the carrier, thereby improving the fuel cell reformer (F / C Reformer). ), A converter, a chemical reactor coated with a catalyst, and the like can be miniaturized and designed.

1 is a process chart for explaining a manufacturing process for producing a reactor according to the present invention,
2 is a SEM photograph showing a fiber electrospun by mixing PVAc and TIP,
3 is a SEM photograph showing the result of sintering the PVAc / TIP spun fiber shown in FIG.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 is a process chart for explaining a manufacturing process for producing a reactor according to the present invention, Figure 2 is a SEM photograph showing the fiber electrospun by mixing PVAc and TIP, Figure 3 is a PVAc / shown in Figure 2 SEM image showing the result of sintering TIP spun fiber.

In the following description, the base carrier refers to a state in which the catalyst support is not coated, and the porous support for the reactor refers to a structure having a porous structure by coating the catalyst support on the base support, and the reactor is a catalyst support on the base support. Refers to a structure coated with a catalyst.

The reactor is, for example, a deodorizing device for removing odors by completely burning the odor gas generated in the food processing device, exhaust gas containing harmful substances such as carbon monoxide (CO), nitrogen oxides (NOx) emitted from the gasoline vehicle Purifying exhaust gas containing harmful substances such as particulate matter (PM) and nitrogen oxides (NOx), etc. Together, it is used for a soot reduction apparatus (DPF) to remove soot, or applied to a fuel cell reformer (F / C Reformer).

In the reactor according to the present invention, as shown in FIG. 1, a fiber-forming polymer is dissolved and dissolved in a solvent (S11), and a metal or ceramic precursor and an additive are dissolved in the dissolved polymer solution to prepare a spinning solution. (S12), and spinning the obtained spinning solution to the base carrier (S13), and if the base carrier is a metal foil, thermally compressing the nanofiber web spun on the metal foil (S14), and the nanofiber web Forming a honeycomb structure using a pressed metal thin plate (S15), and when the molded body formed by the honeycomb structure and the base carrier is a porous carrier or a wire mesh, the carrier on which the spinning solution is spun at high temperature is sintered to a fiber Removing the forming polymer, the organic material contained in the precursor and the like (S16).

Each step is explained in more detail below.

First, the fiber-forming polymer is dissolved in a solvent (S11). In this case, the fiber-forming polymer usable in the present invention Polyurethane copolymer including polyvinyl acetate (PVAc), polyvinyl pyrrolidone (PVP), polyurethane (PUT) and polyether urethane, polyvinyl alcohol (PVA) , Polyacrylonitrile, polyacrylonitrile copolymer including polyacrylonitrile methyl methacrylate copolymer, polymethyl methacrylate, polymethyl methacrylate copolymer, polystyrene, polystyrene acrylonitrile Copolymer, polyethylene, polypropylene, cellulose, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, poly (vinylpyrrolidone-vinylacetate), poly {bis (2- (2-methoxyethoxy) phosphazene ]}, Poly (ethyleneimide), polyethylene glycol, polyethylene glycol dialkyl ether and polyethyl Polyethyleneglycol derivatives including lenglycol dialkyl esters, polyethylene oxides, polyethylenesuccinates, polyethylenesulfides, poly (oxymethylene-oligo-oxyethylene), polypropylene oxides, polyesters, nylons, polyvinyl chlorides, polyvinyl It is preferable that the polymer is selected from the group consisting of fluoride and poly (vinylidene fluoride-co-hexafluoropropylene) alone or in combination. And a material having a radiation compatibility.

The solvent used to dissolve the polymer is, for example, single or plural in DMAc (N, N-dimethylaceticamide), DMF (Dimethylformamide), acetone (Acetone), alcohol (alcohol), EtOH, THF (tetra hydro furan), etc. The mixed solution of can be used.

The amount of the polymer is preferably 5 to 30% by weight with respect to the solvent. When the amount of the polymer is less than 5% by weight, it is sprayed like a spray during spinning and does not form a fibrous form. Is high, making radiation difficult.

Thereafter, a metal or ceramic precursor and additives are dissolved in the dissolved polymer solution to prepare a spinning solution (S12). Metal precursors usable in the present invention include, for example, titanium isopropoxide (TIP), lithium acetylacetonate, manganese acetate tetrahydrate (manganese (II) acetate tetrahydrate), At least one of iron (IV) acetylacetonate, copper acetate monohydrate, aluminum nitrate nonahydrate, or a mixture thereof may be used.

In addition, when oxidized as a ceramic precursor, it is also possible to use ceramics such as alumina (Al ₂ O ₃ ), zirconia (ZrO ₃ ), ceria (CeO ₂ ), titanium (TiO ₂ ), and the like. Further, as the additive, for example, when using TIP (Titanium Isopropoxide) as a precursor, TIP is mixed well in the spinning solution, and acetic acid glacial is added as a dispersant to increase the volatilization of the solvent. can do.

Additives such as the precursor and dispersant are preferably added at 30 to 300% relative to the fiber-forming polymer, respectively. In this case, when the precursor content is less than 30%, the specific surface area of the catalyst support decreases and the amount of inorganic particles decreases, so that the reaction efficiency of the catalyst decreases. When the precursor content exceeds 300%, precipitation of metals occurs. It is generated and trouble occurs during radiation.

In addition, when the additive including the dispersant is less than 30%, the precursors are not mixed well, and when it exceeds 300%, the toxicity of glacial acetic acid may be a problem or the volatilization of the spinning solution may be so high that radiation problems may occur. have.

On the other hand, when the catalyst support is formed simultaneously with the formation of the catalyst support, platinum (Pt), cobalt (Co), nickel (Ni), palladium (Pd) or nano silver (Nano) as a catalyst metal used as a catalyst in the spinning solution. A suitable amount of precursor, such as Silver) may be further included.

According to the type of catalyst metal, the catalyst is relatively low in organic substances contained in odorous gases or harmful substances such as carbon, carbon monoxide (CO) and nitrogen oxides (NOx), for example, at a catalytic activity temperature of 200 to 600 ° C. Induces complete combustion or decomposition at temperature.

Table 1 shows the composition of the spinning solution of the present invention described above.

Raw material composition Polymer menstruum additive One Polyurethane
(PUT) 5-30wt.% DMAc Titanium (IV) isopropoxide 30-300% of polymer Glacial acetic acid 2 Polyvinylacetate
(PVAc) DMAc: THF Titanium (IV) isopropoxide Glacial acetic acid 3 Polyvinylpyrrolidone
(PVP) EtOH Titanium (IV) isopropoxide Glacial acetic acid

The present invention can be used in addition to the above-described spinning solution, a variety of spinning solutions, for example the composition of the specific spinning solution is as follows.

(Composition example 1)

After dissolving by adding 15 wt.% Of PUT (polyurethane) as a polymer to dimethyl acetamide (DMAc) as a solvent, titanium isopropoxide (TIP) as a metal precursor and acetic acid as a dispersant Prepare a spinning solution by adding 50% of Glacial) to each polymer.

(Composition example 2)

After dissolving 20 wt.% Of PVAc (polyvinylacetate) as a polymer to dimethyl acetamide (DMAc) and tetrahydrofuran (THF) mixed at a ratio of 9: 1 as a solvent, titanium isopropoxide, a metal precursor, was dissolved. Prepare a spinning solution by adding (Titanium (IV) Isopropoxide: TIP) and 100% of acetic acid glacial as a dispersant.

(Composition Example 3)

After dissolving 18 wt.% Of PVAc (polyvinylacetate) as a polymer in dimethyl acetamide and tetrahydrofuran mixed in a ratio of 9: 1 as a solvent, iron (IV) acetylacetonate, a metal precursor, was dissolved. 50% of the polymer was added to prepare a spinning solution.

(Composition example 4)

After dissolving 15 wt.% Of PMMA as a polymer in dimethyl acetamide and tetrahydrofuran mixed at a ratio of 9: 1 as a solvent, manganese (II) acetate tetrahydrate, a metal precursor, and iron acetylaceto Nate (iron (IV) acetylacetonate) is added to each polymer by 50% to prepare a spinning solution.

(Composition Example 5)

After dissolving by adding 20 wt.% Of PMMA and PVP as a polymer to dimethyl acetamide as a solvent, manganese (II) acetate tetrahydrate and titanium isopropoxide (TIP) ) And 30% of acetic acid glacial as a dispersant, respectively, to prepare a spinning solution.

(Composition Example 6)

After dissolving by adding 15 wt.% Of PVdF as a polymer to dimethyl acetamide as a solvent, 80% of aluminum nitrate nonahydrate, a metal precursor, is added to a polymer to prepare a spinning solution.

(Composition example 7)

After dissolving by adding 20 wt.% Of PMMA and PVP as a polymer to dimethyl acetamide as a solvent, copper acetate monohydrate, iron (IV) acetylacetonate and titanium isopropoxide A spinning solution is prepared by adding 30% of acetic acid glacial as a side (Titanium (IV) Isopropoxide (TIP)) and a dispersant.

Thereafter, the spinning solution prepared in the step is spun onto the base carrier (S13). In this case, as the base carrier usable in the present invention, for example, nickel (Ni), nickel alloy, FeCrAl, FeCrAl alloy containing a predetermined amount of Ni, Fe-20Cr-5Al-REM (rare earth metal) (here, REM (Y, Hf, Zr) containing about 1%), a metal foam made of metal materials such as Cu, Mn, porous ceramic foam made of ceramic materials, the above heat resistant material A wire mesh made of a metal wire having a pore structure, a flat strip having a plurality of blue pore structures, or a metal sheet made of a heat resistant material may be used.

The pore size of the porous structure is set to, for example, 100 ~ 2000㎛, the cell size of the wire mesh is preferably set in the range of 10 ~ 2000 cpsi (cell per square inch). As for the said metal thin plate, it is preferable to use what has a thickness of 20-100 micrometers, for example.

In addition, the spinning method may be any one of electrospinning, electrospray, electrobrown spinning, centrifugal electrospinning, and flash electroelectrospinning. It is preferable to use.

For example, in the case of using electrospinning, preferable spinning conditions may be set as shown in Table 2 below.

Hole Feeding (μl / min) Voltage (kV) Temperature (℃) Humidity(%) TCD (cm) 5-20 1000-5000 10-100 20-40 40-80 5-30

According to the spinning conditions described above, for example, when spinning is performed on a porous base carrier such as metal foam or ceramic foam or wire mesh, a spinning solution containing a metal and / or a ceramic precursor and a polymer material is formed in the pores of the porous base carrier. Spinning takes place in the form of nanofibers.

In addition, in the case of using a metal thin plate as the base carrier, when the spinning solution is spun, it is formed in the form of a nanofiber web as shown in FIG. Figure 2 shows a SEM photograph of the fiber spun by spinning PVAc and TIP in the spinning solution. The diameter of the nanofibers is preferably set to the spinning conditions to have a range of 50nm ~ 700㎛.

When the spinning is made in the form of a nanofiber web on a metal thin plate as described above, for example, by performing a 10 min thermocompression bonding at 120 ℃ (S14). In this case, the above-mentioned thermal compression conditions may be changed depending on the type of polymer used.

Subsequently, the nanofibrous web is pressed into a carrier having a well-known honeycomb structure by using a thin metal plate (S15). For example, the honeycomb structure may be formed such that each cell is formed into a honeycomb structure by winding a welding made for each contact portion of the flat plate contacted by the corrugated wave plate and forming a cylindrical or cylindrical shape. The cell of the carrier may be formed in a hemispherical shape or a triangle according to the shape of the wave plate.

Subsequently, the molded article formed of the honeycomb structure and the base carrier are porous carriers or wire meshes, for example, sintered for 30 minutes at 450 ° C. for 30 minutes to a fiber-forming polymer and precursor. To remove the organic matter contained (S16). In this case, the sintering heat treatment conditions may be changed according to the type of the organic material included in the polymer and the precursor used.

FIG. 3 is a SEM photograph of the porous structure obtained when the fiber spun by spinning with PVAc and TIP in the spinning solution as shown in FIG. 2 is subjected to high temperature sintering.

The porous structure obtained as described above is obtained in the high-temperature sintering process as shown in Figure 3, the fiber-forming polymer, the organic material contained in the precursor is removed and a porous structure made of inorganic nanofibers made of inorganic materials, in this case the diameter of the inorganic nanofibers Is formed in a granular state ranging from 10 nm to 700 nm.

In the above process, the porous carrier for the reactor having a porous structure by coating only the catalyst support without a catalyst on the base carrier is further used to coat the catalyst to be used as a reactor such as a catalyst carrier, or to reduce smoke without coating the catalyst. (DPF) and the like.

In addition, the reactor in which the catalyst support and the catalyst are coated together on the base carrier may have various applications. For example, the reactor may be assembled with a heater in a housing and used as a carrier converter for purifying exhaust gas.

The present invention will be described in more detail with reference to the following Examples.

(Example 1)

After dissolving 18 wt.% Of PVAc as a polymer in dimethyl acetamide and tetrahydrofuran mixed at a ratio of 9: 1 as a solvent, titanium isopropoxide (TIP), a metal precursor, and glacial acetic acid (A) as a dispersant Acetic Acid Glacial) was added by 80% of each polymer to prepare a spinning solution, and then electrospinning was performed on a metal plate made of FeCrAl as a base carrier while applying a voltage of 20 kV between the spinning nozzle and the collector in an electrospinning apparatus. To form a nanofiber web.

Thereafter, the nanofiber web spun on the metal thin plate was thermally compressed at 80 ° C. for 10 minutes, and then heated at a temperature rising rate of 1 ° C./min, and heat-treated at 500 ° C. for 1 hour to remove various organic matters, thereby increasing the porosity of the reactor. A carrier was obtained.

SEM pictures of the nanofiber web formed on the metal thin plate before the sintering heat treatment are shown in FIG. 2, and SEM pictures after the sintering heat treatment are shown in FIG. 3.

The nanofibers forming the nanofiber web before the sintering heat treatment appeared to have a diameter in the range of 400-700 nm as shown in FIG. 2, and the inorganic nanofibers after the sintering heat treatment was also crosslinked between the nanofibers as shown in FIG. Porous, inorganic nanofibers also appeared to have diameters in the 400-700 nm range.

As a result of the above experiment, when the web is formed by spinning the catalyst support alone or the catalyst and the catalyst support on the base carrier, and then sintered, the reactor having a three-dimensional porous structure capable of improving the reaction efficiency can be improved by a simple method. It can be seen that it can be produced.

In the present invention, the catalyst support alone or the catalyst and catalyst support can be formed on the base carrier by a simple method using a spinning method, and since the porous structure is formed using nanofibers, the surface area is wide, which can improve the reaction efficiency. Applied to the reactor.

Claims (13)

Dissolving the fiber-forming polymer in a solvent to dissolve it;
Preparing a spinning solution by dissolving a metal or ceramic precursor and an additive in the dissolved polymer solution;
Spinning the obtained spinning solution on a porous carrier or a wire mesh as a base carrier to form a nanofiber web,
The method of manufacturing a porous carrier for a reactor, characterized in that it comprises the step of removing the organic material contained in the fiber-forming polymer, precursor by sintering the base support formed with the nanofiber web. Dissolving the fiber-forming polymer in a solvent to dissolve it;
Preparing a spinning solution by dissolving a metal or ceramic precursor and an additive in the dissolved polymer solution;
Spinning the obtained spinning solution on a thin metal sheet,
Thermally compressing the nanofiber web spun onto the metal sheet;
Forming a honeycomb structure by using the thin metal sheet to which the nanofiber web is pressed;
A method of manufacturing a porous carrier for a reactor, characterized in that it comprises the step of removing the organic material contained in the fiber-forming polymer, precursor by sintering the molded body formed in the honeycomb structure at high temperature. 3. The method of claim 1, wherein the polymer solution contains 5 to 30 wt.% Of a fiber-forming polymer. 4. The method of claim 1 or 2, wherein the spinning solution contains 30 to 300% of the metal or ceramic precursor and additives relative to the polymer. The method of claim 1, wherein the diameter of the nanofibers is in the range of 50 nm to 700 μm. A porous carrier for a reactor obtained according to claim 1. Dissolving the fiber-forming polymer in a solvent to dissolve it;
Preparing a spinning solution by dissolving a metal or ceramic precursor, a catalyst metal and an additive in the dissolved polymer solution;
Spinning the obtained spinning solution on a porous carrier or a wire mesh as a base carrier to form a nanofiber web,
Sintering the base support on which the nanofiber web is formed at a high temperature to prepare a reactor, characterized in that to remove the organic matter contained in the fiber-forming polymer, precursor. Dissolving the fiber-forming polymer in a solvent to dissolve it;
Preparing a spinning solution by dissolving a metal or ceramic precursor, a catalyst metal and an additive in the dissolved polymer solution;
Spinning the obtained spinning solution on a thin metal sheet,
Thermally compressing the nanofiber web spun onto the metal sheet;
Forming a honeycomb structure by using the thin metal sheet to which the nanofiber web is pressed;
High temperature sintering the molded body formed in the honeycomb structure to remove the organic matter contained in the fiber-forming polymer, precursor precursor manufacturing method comprising a. The method according to claim 7 or 8, wherein the polymer solution contains 5 to 30 wt.% Of a fiber-forming polymer. The method according to claim 7 or 8, wherein the spinning solution contains 30 to 300% of the metal or ceramic precursor and additives relative to the polymer. The method of claim 7 or 8, wherein the metal precursor is titanium isopropoxide (TIP), lithium acetylacetonate (Lithium Acetylacetonate), manganese acetate tetrahydrate, iron acetylacetonate ( iron acetylacetonate) and at least one selected from aluminum nitrate nonahydrate,
When the ceramic precursor is oxidized, at least one selected from among those capable of forming ceramics of alumina (Al ₂ O ₃ ), zirconia (ZrO ₃ ), ceria (CeO ₂ ), and titanium (TiO ₂ ) is used. Method for producing a porous carrier for the reactor. The method of claim 7 or 8, wherein the catalytic metal is to use at least one precursor selected from platinum (Pt), cobalt (Co), nickel (Ni), palladium (Pd), nano silver (Nano Silver) Method for producing a porous carrier for the reactor, characterized in that. Reactor obtained according to claim 7.

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