WO2016133238A1 - 연료 전지용 탈황 흡착 촉매 및 그 제조 방법 - Google Patents
연료 전지용 탈황 흡착 촉매 및 그 제조 방법 Download PDFInfo
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- WO2016133238A1 WO2016133238A1 PCT/KR2015/002998 KR2015002998W WO2016133238A1 WO 2016133238 A1 WO2016133238 A1 WO 2016133238A1 KR 2015002998 W KR2015002998 W KR 2015002998W WO 2016133238 A1 WO2016133238 A1 WO 2016133238A1
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- nickel
- adsorption catalyst
- desulfurization adsorption
- fuel cell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/281—Sorbents specially adapted for preparative, analytical or investigative chromatography
- B01J20/282—Porous sorbents
- B01J20/284—Porous sorbents based on alumina
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/755—Nickel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
- H01M8/0675—Removal of sulfur
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a desulfurization adsorption catalyst for fuel cells that can be used to adsorb and remove sulfur compounds contained in diesel oil for producing hydrogen for fuel cells, and a method of manufacturing the same.
- fuel cells have unique characteristics depending on the type of electrolyte used, and are largely alkaline fuel cells (AFCs), phosphate acid fuel cells (PAFCs), and polymer electrolyte fuel cells (Polymer Electrolyte).
- AFCs alkaline fuel cells
- PAFCs phosphate acid fuel cells
- Polymer electrolyte fuel cells Polymer Electrolyte fuel cells
- Fuel Cell, PEFC Solid Oxide Fuel Cell (SOFC), Molten Carbonate Fuel Cell (MCFC), Direct Methanol Fuel Cell (DMFC), etc. .
- fuel cells can be classified into high temperature type and low temperature type according to the operating temperature.
- PAFC, PEFC, DMFC, etc. are classified as low temperature type by operating below 200 °C from normal temperature.
- high efficiency type such as MCFC, SOFC, etc. is operated above 600 °C, and general metal catalyst such as nickel is used as electrode catalyst. It has the disadvantage of high, high power but long start-up time.
- the fuel cell can be largely applied to portable, building, transportation, power generation, etc. according to the capacity and type of the system, the power generation fuel cell can produce power of more than several hundred kW.
- molten carbonate fuel cell can be divided into the external reforming type and the internal reforming type according to the reforming method of the fuel used, the external reforming type is a problem such as the complexity of the system configuration, linkage operation reliability, etc. Additional development is required to solve this problem. Internal reforms are being commercialized in the US, Germany, and Korea.
- the internally reformed molten carbonate fuel cell (MCFC) stack is used as a raw material by reforming low hydrocarbons (hydrocarbons having a small number of carbons) such as methane, but natural gas or diesel, which is currently commercially available fossil fuel, is molten carbonate. It is not directly used in fuel cells (MCFC) but can be decomposed into low hydrocarbons such as methane through a pre-reformer, using gaseous fuel reforming methods for using natural gas, ship oil, diesel, etc. The development is divided into the liquid fuel reforming method for.
- a particularly technically difficult part of diesel fuel reformer technology is to remove sulfur so that sulfur contained in about 10 ppmw in domestic commercial diesel can be maintained at a concentration of 0.1 ppmw or less.
- Sulfur is used in diesel fuel such as 4,6-disubstituted dibenzothiophene It is included in its form, and the molecule is low in reactivity, making it difficult to isolate.
- the sulfur components contained in diesel oil are converted into toxic substances of hydrogen sulfide (H 2 S) through the reformer for molten carbonate fuel cell (MCFC) and the internal reforming part of the molten carbonate fuel cell (MCFC).
- H 2 S hydrogen sulfide
- the performance of the unit cell can be greatly reduced by poisoning the reformer's active catalyst and the electrode of the molten carbonate fuel cell (MCFC).
- Sulfur removal techniques for use of the hydrogen fuel cell as described above can be broadly classified into hydrodesulfurization technology (HDS) and selective adsorption desulfurization technology.
- HDS hydrodesulfurization technology
- selective adsorption desulfurization technology selective adsorption desulfurization technology
- the hydrogenated desulfurization technique when the hydrogen is added to remove the sulfur contained in the diesel, the less reactive sulfur compound added to the diesel is HDS catalyst (for example, Co-Mo / Al 2 O 3 , Ni-Mo / Al 2 O 3, etc.) to react with hydrogen to produce hydrogen sulfide (H 2 S), and the generated hydrogen sulfide generates zinc sulfide (ZnS) while passing through the ZnO catalyst layer.
- the sulfur adsorbed in the form of zinc sulfide (ZnS) can be separated through a catalyst regeneration process.
- the desulfurization technique using an adsorption desulfurizer is described in recent years due to the advantages of simple equipment and good desulfurization performance, and can be operated at room temperature and atmospheric pressure and there is no need to add hydrogen separately. It is known to be suitable for molten carbonate fuel cells (MCFCs) using internal reforming compared to hydrodesulfurization technology (HDS).
- MCFCs molten carbonate fuel cells
- HDS hydrodesulfurization technology
- the present invention is a sulfur compound contained in diesel oil for producing hydrogen for fuel cells by producing a desulfurization adsorption catalyst by mixing and extruding gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal. It is an object of the present invention to provide a desulfurization adsorption catalyst for a fuel cell and a method of manufacturing the same that can be used for adsorption and removal.
- the present invention provides a desulfurization adsorption catalyst obtained by sintering the adsorption catalyst in an oxidizing atmosphere and heat-treated in a reducing atmosphere, thereby improving the adsorption and removal characteristics of sulfur compounds contained in diesel oil for producing hydrogen for fuel cells.
- the present invention provides a desulfurization adsorption catalyst for batteries and a method for producing the same.
- a desulfurization adsorption catalyst for a fuel cell prepared by using gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal may be provided.
- the step of performing a pre-treatment step of heat treatment and grinding the gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal, respectively, and the gamma alumina ( ⁇ - Al 2 O 3 ) and the nickel oxide (NiO) or nickel (Ni) metal comprising the step of forming a noodle, forming the noodle form and sintering in an oxidizing atmosphere, and sintering in the oxidizing atmosphere
- a method for producing a desulfurization adsorption catalyst for a fuel cell comprising the step of heat treatment in a reducing atmosphere.
- a desulfurization adsorption catalyst is prepared by mixing and extruding gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal, thereby being included in diesel oil for producing hydrogen for fuel cells. It can be used to adsorb and remove sulfur compounds.
- the present invention can improve the adsorption and removal characteristics of sulfur compounds contained in diesel oil for producing hydrogen for fuel cells by sintering the adsorption catalyst in an oxidizing atmosphere and providing a desulfurization adsorption catalyst inferior in a reducing atmosphere.
- FIG. 1 is a photograph illustrating a desulfurization adsorption catalyst for a fuel cell according to a first embodiment of the present invention
- FIG. 2 is a view illustrating a BET analysis result of a desulfurization adsorption catalyst for a fuel cell according to a first embodiment of the present invention
- FIG. 3 is a view illustrating a porosity analysis result of a desulfurization adsorption catalyst for a fuel cell according to a first embodiment of the present invention
- Figure 4 is a step-by-step flowchart showing a process for producing a desulfurization adsorption catalyst for a fuel cell according to a second embodiment of the present invention.
- FIG. 1 is a view illustrating a desulfurization adsorption catalyst for a fuel cell according to a first embodiment of the present invention.
- FIG. 1 is a photograph illustrating a catalyst extruded in the form of a noodle in a clockwise direction on the basis of the first photograph on the left side, a catalyst after sintering, and a catalyst after reduction heat treatment.
- the desulfurization adsorption catalyst for a fuel cell according to the first embodiment of the present invention may include gamma alumina ( ⁇ -Al 2 O 3 ), nickel oxide (NiO), nickel (Ni) metal, or the like. .
- gamma alumina ⁇ -Al 2 O 3
- nickel oxide NiO
- nickel (Ni) metal may be included as 40-50 wt%
- the sulfur compound may be adsorbed while generating nickel sulfide (NiS) through the desulfurization adsorption catalyst for a fuel cell according to the first embodiment.
- the desulfurization adsorption catalyst for fuel cells may be molded according to various molding methods, and a cellulose type aqueous binder may be mixed, and the ratio thereof may be mixed with gamma alumina ( ⁇ -Al 2 O 3 ) included in the desulfurization adsorption catalyst for fuel cells. , Based on 100 parts by weight of powder of nickel oxide (NiO) or nickel (Ni) metal may be included as 1-10 parts by weight.
- gamma alumina ⁇ -Al 2 O 3
- nickel oxide NiO
- the aqueous binder may be molded together in such a way that they are mixed together and extruded in the form of noodle.
- aqueous binders 1-10 g are mixed together based on 50-60 g of gamma alumina ( ⁇ -Al 2 O 3 ) and 100 g of powder containing 40-60 g of nickel oxide (NiO) or nickel (Ni) metal. It may be extruded in the form of a noodle after mixing to form a desulfurization adsorption catalyst for a fuel cell.
- the outside of the support chain gamma alumina ( ⁇ -Al 2 O 3) in the nickel (Ni) may be formed by extrusion of the two to be a coating, a gamma alumina formed as a support of the noodle shape ( ⁇ -Al 2 O 3) Nickel oxide (NiO) or nickel (Ni) and the aqueous binder may be molded in a manner that is mixed, coated and extruded.
- the nickel (Ni) component does not exist in gamma alumina ( ⁇ -Al 2 O 3 ), and when the cut surface is cut, the two layers (that is, the gamma alumina layer) are observed. And a nickel layer), and may be molded by a method of preparing and coating a slurry for dipping of nickel oxide (NiO) on a gamma alumina ( ⁇ -Al 2 O 3 ) support.
- the gamma alumina ( ⁇ -Al 2 O 3 ) support can be formed by impregnating with nickel nitrate (Ni nitrate), but gamma alumina ( ⁇ -Al 2 O 3 ) is an aqueous binder and carbon black After the addition of the pores to form a support in the form of a noodle, nickel nitrate (Ni nitrate) by mixing and heat treatment can be molded in such a way to impregnate the nickel (Ni) metal in the pores.
- carbon black may be included in an amount of 1-10 parts by weight based on gamma alumina ( ⁇ -Al 2 O 3 ) and 100 parts by weight of powder of nickel oxide (NiO) or nickel (Ni) metal.
- gamma alumina ⁇ -Al 2 O 3
- an aqueous binder and carbon black are added to form a support, and the formed support is subjected to heat treatment at approximately 850-950 ° C. to burn the carbon black, and the mechanical strength of the support. Can improve.
- the gamma alumina support prepared through this process is immersed in a solution containing nickel nitrate and DI water (Deionized Water) in a ratio of approximately 1: 1, and then approximately 50- so that the nickel nitrate solution is sufficiently infiltrated into the gamma alumina support. It may be maintained for 100 seconds, naturally dried for approximately 20-30 hours, and then heat treated at approximately 450-550 ° C.
- a solution containing nickel nitrate and DI water (Deionized Water) in a ratio of approximately 1: 1, and then approximately 50- so that the nickel nitrate solution is sufficiently infiltrated into the gamma alumina support. It may be maintained for 100 seconds, naturally dried for approximately 20-30 hours, and then heat treated at approximately 450-550 ° C.
- the above-described process ie, the process of dipping the gamma alumina support in the nickel nitrate solution and then performing the heat treatment
- the desulfurization adsorption catalyst for fuel cells can be molded in the form of noodle in three ways as described above, and then secure a dense sintered body of the catalyst through a high temperature oxidation process (that is, sintering in an oxidizing atmosphere), and reducing atmosphere Through the heat treatment of the nickel oxide (NiO) is changed to nickel (Ni) through a reduction process can increase the activity of the catalyst.
- the sintering treatment in an oxidizing atmosphere is performed for 100-150 minutes at 800-900 ° C. in a hydrogen (H 2 ) atmosphere, thereby burning gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide together with combustion of an aqueous binder. Sintering of (NiO) may proceed.
- the heat treatment in the reducing atmosphere as described above may be performed for 100-150 minutes at 800-900 °C in a hydrogen (H 2 ) atmosphere, the activity of the catalyst as nickel oxide (NiO) is reduced to nickel (Ni) Can improve (increase)
- the sintering and heat treatment are performed at a temperature of 900 °C or more, the specific surface area is drastically reduced, and when the sintering and heat treatment is performed at a temperature of 1200 °C or more, the phase of alumina (Al 2 O 3 ) is changed from gamma to alpha
- the sintering treatment in an oxidizing atmosphere and the heat treatment in a reducing atmosphere are respectively 800-900 at a temperature below 800 ° C. Preference is given to performing at 100 ° C. for 100-150 minutes.
- the sintering treatment in the oxidizing atmosphere and the heat treatment in the reducing atmosphere may be performed separately to improve the mechanical properties, nickel oxide is well adsorbed to the alumina through the sintering treatment, if the nickel oxide is reduced to nickel
- the reaction area of the catalyst can be increased, and a catalyst having improved desulfurization adsorption performance can be obtained.
- BET Brunauer-Emmett-Teller
- the present invention sample 1 subjected to oxidative sintering was measured at 16.38326 nm
- the present invention sample 2 subjected to reduction heat treatment was measured at 17.03400 nm, thereby improving the pore size compared to the conventional desulfurization adsorption catalyst. It can be seen that the desulfurization adsorption reaction performance is improved.
- the porosimeter is a device for measuring the porosity of the material using mercury, porosity through the mercury penetrated by the water penetrating the pores generated in the material And the pore size is measured, it can be seen that the porosity of 55.7083% and 57.9407% in the present invention sample 1 and the invention sample 2 according to the measured pore size, which is not significantly different from the conventional sample 1 It can be seen that a desulfurization adsorption catalyst for fuel cells having excellent desulfurization adsorption performance can be provided.
- the present invention is included in diesel oil for producing hydrogen for fuel cells by producing a desulfurization adsorption catalyst by mixing and extruding gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal. It can be used to adsorb and remove sulfur compounds.
- the present invention can improve the adsorption and removal characteristics of sulfur compounds contained in diesel oil for producing hydrogen for fuel cells by providing a desulfurization adsorption catalyst sintered in an oxidizing atmosphere and heat treated in a reducing atmosphere.
- gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal are mixed and extruded, and then sintered to densify the structure and reduced to improve the activity of the catalyst.
- NiO nickel oxide
- Ni nickel
- FIG. 4 is a step-by-step flowchart illustrating a process of manufacturing a desulfurization adsorption catalyst for a fuel cell according to a second embodiment of the present invention.
- a pretreatment process of thermally treating and pulverizing gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal may be performed (step 402).
- gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal are each ball milled for 100-150 minutes after heat treatment at 850-950 ° C. in powder (ie powder) form, respectively.
- the gamma alumina ( ⁇ -Al 2 O 3 ) and the nickel oxide (NiO) or nickel (Ni) metal may be formed into a noodle form (step 404).
- This forming step can be molded according to a variety of ways, where gamma alumina ( ⁇ -Al 2 O 3 ) is 50-60 wt%, and nickel oxide (NiO) or nickel (Ni) metal is 40-50 It may be included as wt%, hydrogen sulfide can be adsorbed sulfur compounds while producing nickel sulfide (NiS) through the desulfurization adsorption catalyst for fuel cells prepared according to the second embodiment of the present invention.
- a cellulose-based aqueous binder may be mixed, and the ratio is gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal powder included in the desulfurization adsorption catalyst for fuel cells. It may be included in 1-10 parts by weight based on parts by weight.
- gamma alumina ( ⁇ -Al 2 O 3 ), nickel oxide (NiO) or nickel (Ni) metal, and the aqueous binder may be molded together in such a way that they are mixed together and extruded in the form of noodle. That is, 1-10 g of aqueous binders are mixed together based on 50-60 g of gamma alumina ( ⁇ -Al 2 O 3 ) and 100 g of powder containing 40-60 g of nickel oxide (NiO) or nickel (Ni) metal. It may be extruded in the form of a noodle after mixing to form a desulfurization adsorption catalyst for a fuel cell.
- the outside of the support chain gamma alumina ( ⁇ -Al 2 O 3) in the nickel (Ni) may be formed by extrusion of the two to be a coating, a gamma alumina formed as a support of the noodle shape ( ⁇ -Al 2 O 3) Nickel oxide (NiO) or nickel (Ni) and the aqueous binder may be molded in a manner that is mixed, coated and extruded.
- composition ratio according to the second method may also be mixed according to the composition ratio of the first method, and preparing and coating a slurry for dipping of nickel oxide (NiO) on a gamma alumina ( ⁇ -Al 2 O 3 ) support. It can be molded by technique.
- the gamma alumina ( ⁇ -Al 2 O 3 ) support can be formed by impregnating with nickel nitrate (Ni nitrate), but gamma alumina ( ⁇ -Al 2 O 3 ) is an aqueous binder and carbon black After the addition of the pores to form a support in the form of a noodle, nickel nitrate (Ni nitrate) by mixing and heat treatment can be molded in such a way to impregnate the nickel (Ni) metal in the pores.
- composition ratio according to the third method can also be mixed according to the composition ratio of the first method, and carbon black is powder of gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal. It may be included in 1-10 parts by weight based on parts by weight.
- step 406 it can be shaped into a noodle and then sintered in an oxidizing atmosphere (step 406).
- the sintering treatment in an oxidizing atmosphere is carried out for 100-150 minutes at 800-900 ° C. in a hydrogen (H 2 ) atmosphere, whereby gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide ( NiO) may be sintered.
- H 2 hydrogen
- NiO nickel oxide
- heat treatment may be performed in a reducing atmosphere (step 408).
- heat treatment in a reducing atmosphere may be performed for 100-150 minutes at 800-900 ° C. in a hydrogen (H 2 ) atmosphere, and nickel oxide (NiO) is reduced to nickel (Ni) to improve the activity of the catalyst ( Increase).
- the sintering treatment in the oxidizing atmosphere and the heat treatment in the reducing atmosphere may be performed separately to improve the mechanical properties, nickel oxide is well adsorbed to the alumina through the sintering treatment, if the nickel oxide is reduced to nickel
- the reaction area of the catalyst can be increased, and a catalyst having improved desulfurization adsorption performance can be obtained.
- the present invention is included in diesel oil for producing hydrogen for fuel cells by producing a desulfurization adsorption catalyst by mixing and extruding gamma alumina ( ⁇ -Al 2 O 3 ) and nickel oxide (NiO) or nickel (Ni) metal. It can be used to adsorb and remove sulfur compounds.
- the present invention can improve the adsorption and removal characteristics of sulfur compounds contained in diesel oil for producing hydrogen for fuel cells by providing a desulfurization adsorption catalyst sintered in an oxidizing atmosphere and heat treated in a reducing atmosphere.
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Abstract
Description
Claims (20)
- 감마 알루미나(γ-Al2O3)와, 니켈산화물(NiO) 또는 니켈(Ni) 금속을 포함하여 제조되는 연료 전지용 탈황 흡착 촉매.
- 제 1 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 상기 감마 알루미나(γ-Al2O3)가 50-60 wt%로 하고, 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속이 40-50 wt%로 하여 포함되는 연료 전지용 탈황 흡착 촉매.
- 제 2 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 성형 시 상기 감마 알루미나(γ-Al2O3)와, 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속이 포함된 분말 100 중량부를 기준으로 셀룰로오스 타입의 수계 바인더가 1-10 중량부로 하여 혼합되는 연료 전지용 탈황 흡착 촉매.
- 제 3 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 성형된 후 800-900 ℃에서 100-150 분 동안 산화 분위기에서 소결 처리되는 연료 전지용 탈황 흡착 촉매.
- 제 4 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 상기 산화 분위기에서 소결 처리된 후에 800-900 ℃에서 100-150 분 동안 환원 분위기에서 열처리되는 연료 전지용 탈황 흡착 촉매.
- 제 3 항 내지 제 5 항 중 어느 한 항에 있어서,상기 감마 알루미나(γ-Al2O3)와 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속은, 각각 촉매의 비표면적 및 기공률을 제어하기 위해 850-950 ℃에서 열처리한 후 100-150 분 동안 볼밀 방식으로 분쇄하는 전처리 공정을 수행하는 연료 전지용 탈황 흡착 촉매.
- 제 3 항 내지 제 5 항 중 어느 한 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 상기 감마 알루미나(γ-Al2O3)와, 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속과, 상기 수계 바인더가 혼합되어 압출되는 방식으로 성형되는 연료 전지용 탈황 흡착 촉매.
- 제 3 항 내지 제 5 항 중 어느 한 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 누들 형태의 지지체로 형성된 상기 감마 알루미나(γ-Al2O3)의 외부에 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속과 상기 수계 바인더가 혼합 및 코팅되어 압출되는 방식으로 성형되는 연료 전지용 탈황 흡착 촉매.
- 제 3 항 내지 제 5 항 중 어느 한 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 상기 감마 알루미나(γ-Al2O3)에 상기 수계 바인더와 카본 블랙을 첨가하여 기공이 형성된 누들 형태의 지지체로 형성한 후, 니켈 질산염(Ni nitrate)을 혼합 및 열처리하여 상기 기공에 상기 니켈(Ni) 금속을 함침시키는 방식으로 성형되는 연료 전지용 탈황 흡착 촉매.
- 제 9 항에 있어서,상기 연료 전지용 탈황 흡착 촉매는, 상기 니켈 질산염(Ni nitrate)을 혼합 열처리하는 공정을 적어도 1회 수행하는 연료 전지용 탈황 흡착 촉매.
- 감마 알루미나(γ-Al2O3)와 니켈산화물(NiO) 또는 니켈(Ni) 금속을 각각 열처리 및 분쇄하는 전처리 공정을 수행하는 단계와,상기 감마 알루미나(γ-Al2O3)와 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속을 포함하여 누들 형태로 성형하는 단계와,상기 누들 형태로 성형한 후 산화 분위기에서 소결 처리하는 단계와,상기 산화 분위기에서 소결 처리한 후에 환원 분위기에서 열처리하는 단계를 포함하는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 11 항에 있어서,상기 제조 방법에 따라 제조되는 연료 전지용 탈황 흡착 촉매는, 상기 감마 알루미나(γ-Al2O3)가 50-60 wt%로 하고, 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속이 40-50 wt%로 하여 포함되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 11 항에 있어서,상기 누들 형태로 성형하는 단계는, 성형 시 상기 감마 알루미나(γ-Al2O3)와, 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속이 포함된 분말 100 중량부를 기준으로 셀룰로오스 타입의 수계 바인더가 1-10 중량부로 하여 혼합되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 11 항에 있어서,상기 산화 분위기에서 소결 처리하는 단계는, 성형된 후 800-900 ℃에서 100-150 분 동안 수행되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 11 항에 있어서,상기 환원 분위기에서 열처리하는 단계는, 상기 소결 처리된 후에 800-900 ℃에서 100-150 분 동안 수행되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 11 항 내지 제 15 항 중 어느 한 항에 있어서,상기 전처리 공정을 수행하는 단계는, 촉매의 비표면적 및 기공률을 제어하기 위해 상기 감마 알루미나(γ-Al2O3)와 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속을 각각 850-950 ℃에서 열처리한 후 100-150 분 동안 볼밀 방식으로 분쇄하는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 13 항 내지 제 15 항 중 어느 한 항에 있어서,상기 누들 형태로 성형하는 단계는, 상기 감마 알루미나(γ-Al2O3)와, 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속과, 상기 수계 바인더가 혼합되어 압출되는 방식으로 성형되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 13 항 내지 제 15 항 중 어느 한 항에 있어서,상기 누들 형태로 성형하는 단계는, 누들 형태의 지지체로 형성된 상기 감마 알루미나(γ-Al2O3)의 외부에 상기 니켈산화물(NiO) 또는 니켈(Ni) 금속과 상기 수계 바인더가 혼합 및 코팅되어 압출되는 방식으로 성형되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 13 항 내지 제 15 항 중 어느 한 항에 있어서,상기 누들 형태로 성형하는 단계는, 상기 감마 알루미나(γ-Al2O3)에 상기 수계 바인더와 카본 블랙을 첨가하여 기공이 형성된 누들 형태의 지지체로 형성한 후, 니켈 질산염(Ni nitrate)을 혼합 및 열처리하여 상기 기공에 상기 니켈(Ni) 금속을 함침시키는 방식으로 성형되는 연료 전지용 탈황 흡착 촉매의 제조 방법.
- 제 19 항에 있어서,상기 누들 형태로 성형하는 단계는, 상기 니켈 질산염(Ni nitrate)을 혼합 열처리하는 공정을 적어도 1회 수행하는 연료 전지용 탈황 흡착 촉매의 제조 방법.
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