Microtubular honeycomb carbon material obtained by heat-treating cellulose fiber, production method of thereof, microtubular reactor module comprising the microtubular honeycomb carbon material and method for producing the microtubular reactor module
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-033/34
B01J-019/00
B01J-010/00
B32B-003/12
B23K-011/00
B23K-026/00
C01B-031/00
B29C-065/00
출원번호
US-0071223
(2008-02-19)
등록번호
US-8187400
(2012-05-29)
우선권정보
KR-10-2007-0094579 (2007-09-18)
발명자
/ 주소
Jeong, Nam Jo
Han, Seong Ok
Kim, Hong Soo
Kim, Hee Yeon
출원인 / 주소
Korea Institute of Energy Research
대리인 / 주소
LRK Patent Law Firm
인용정보
피인용 횟수 :
3인용 특허 :
6
초록▼
Disclosed herein are a microtubular honeycomb carbon material obtained by heat-treating cellulose fiber, a production method thereof, a microtubular reactor module fabricated using the microtubular honeycomb carbon, a method for producing the microtubular reactor module, and a microcatalytic reactor
Disclosed herein are a microtubular honeycomb carbon material obtained by heat-treating cellulose fiber, a production method thereof, a microtubular reactor module fabricated using the microtubular honeycomb carbon, a method for producing the microtubular reactor module, and a microcatalytic reactor system comprising the microtubular reactor module. A carbon material having a new structure is produced by heat-treating cellulose fiber, and a catalytic reactor system having a new structure is constructed by coating the surface of the carbon material with a metal catalyst. Cellulose carbide, used as the reactor material, is very simple to produce. Because it has a micro honeycomb structure having a large number of microchannels and a large number of mesopores, it can be loaded with a large amount of a catalyst compared to the prior material having the same area, and thus it is useful as a catalyst support, and the reaction efficiency can be maximized. Also, the microcatalytic reactor system can be used in applications including very small steam reformer systems that use biomass fuel such as ethanol, fuel cell reactor systems, VOC and low-concentration-hydrogen treatment systems operable below 200□, micro heat exchangers, and natural gas reformer systems. Thus, the invention is a useful, industrially applicable invention.
대표청구항▼
1. A method for producing a microtubular reactor module for use in microcatalytic reactor systems, the method comprising; preparing a metal catalyst solution having a nano-sized metal catalyst dispersed therein;coating the metal catalyst solution on a surface of a microtubular honeycomb carbon mater
1. A method for producing a microtubular reactor module for use in microcatalytic reactor systems, the method comprising; preparing a metal catalyst solution having a nano-sized metal catalyst dispersed therein;coating the metal catalyst solution on a surface of a microtubular honeycomb carbon material obtained from cellulose microfiber only and having a honeycomb structure in a sectional view thereof, the surface being in contact with fluid flow;drying the coated microtubular honeycomb carbon material, and then reducing the nano-sized metal catalyst-coated surface of the carbon material in a reducing atmosphere; andassembling and sealing a reactor frame around each of the reduced microtubular honeycomb carbon materials using an adhesive,wherein the microtubular honeycomb carbon material has a diameter ranging from 200 to 600 μm, andwherein the coating includes at least:placing the catalyst dispersion in a first micro-pipette to form a drop, and locating the micro-pipette at one side; andplacing the above-produced microtubular honeycomb carbon material in a second micro-pipette, and sealing the gap between the second micro-pipette and the microtubular honeycomb carbon material with an optical adhesive. 2. The method of claim 1, wherein the preparing of the metal catalyst solution having the nano-sized metal catalyst dispersed therein is performed by dispersing in distilled water any one or more selected from the group consisting of nickel, platinum, palladium and rhodium, at a concentration of 0.1-1 mol %. 3. A method for producing a microtubular reactor module for use in microcatalytic reactor systems, the method comprising: preparing a metal catalyst solution having a nano-sized metal catalyst dispersed therein;coating the metal catalyst solution on the surface of a microtubular honeycomb carbon material from cellulose microfiber, the surface being in contact with fluid flow;drying the coated microtubular honeycomb carbon material, and then reducing the nano-sized metal catalyst-coated surface of the carbon material in a reducing atmosphere; andassembling and sealing a reactor frame around the reduced microtubular honeycomb carbon material using an adhesive,wherein the coating of the metal catalyst solution on the surface of the microtubular honeycomb carbon material is performed by:placing the catalyst dispersion in a first micro-pipette to form a drop, and locating the micro-pipette at one side;placing the above-produced microtubular honeycomb carbon material in a second micro-pipette, sealing the gap between the second micro-pipette and the microtubular honeycomb carbon material with an optical adhesive, and locating the second micro-pipette at another side; andforming a pressure gradient between both ends of the microtubular honeycomb carbon material using capillary force of the microtubular honeycomb carbon material and a vacuum pump so as to suck minutely the catalyst solution drop formed in the first micro-pipette and to coat the catalyst on the surface of the microtubules fixed in the second micro-pipette, and repeating this pressure gradient-forming process to coat the catalyst the surface of the microtubules. 4. The method of claim 1, wherein the reactor frame is made of stainless steel (SUS) or ceramic material, andwherein the assembling and sealing of the reactor frame around the reduced microtubular honeycomb carbon material using the adhesive is performed by:placing the reduced microtubular honeycomb carbon material in a half reactor frame filled with a ceramic adhesive;covering the resulting microtubular honeycomb carbon material with another half reactor frame filled with a ceramic adhesive, and drying the resulting microtubular reactor module at 100-150° C. for more than 24 hours; andsealing all the gaps in the dried microtubular reactor module by laser welding if the reactor frame is made of the stainless steel, or sealing the gaps with a high-temperature ceramic adhesive if the reactor frame is made of the ceramic material. 5. The method of claim 1, wherein the sealing of the reactor module is performed using an epoxy-based adhesive at a temperature lower than 300° C. or a ceramic adhesive at a temperature of 300° C. or higher. 6. A method for producing a microtubular reactor module for use in microcatalytic reactor systems, the method comprising: preparing a metal catalyst solution having a nano-sized metal catalyst dispersed therein;coating the metal catalyst solution on a surface of a microtubular honeycomb carbon material obtained from cellulose microfiber only and having a honeycomb structure in a sectional view thereof the surface being in contact with fluid flow;drying the coated microtubular honeycomb carbon material, and, then reducing the nano-sized metal catalyst-coated surface of the carbon material in a reducing atmosphere; andassembling and sealing a reactor frame around each of the reduced microtubular honeycomb carbon materials using an adhesive,wherein the microtubular honeycomb carbon material is produced by:wetting and washing cellulose microfiber with distilled water and drying the washed cellulose microfiber at room temperature;placing the dried cellulose microfiber in a reactor system for high-temperature heat treatment and removing oxygen remaining in the reactor system by means of a vacuum pump; andheat-treating the cellulose microfiber in the reactor system in an atmosphere of reducing gas such as hydrogen while controlling the temperature of the reactor system in a range of 500-1500° C.; andwherein the coating includes at least:placing the catalyst dispersion in a first micro-pipette to form a drop, and locating the micro-pipette at one side; andplacing the above-produced microtubular honeycomb carbon material in a second micro-pipette, and sealing the gap between the second micro-pipette and the microtubular honeycomb carbon material with an optical adhesive.
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이 특허에 인용된 특허 (6)
Dale Robert W. (Belfast GB5) Rooney John J. (Belfast GB5), Catalysts.
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