WO2014158009A1 - 나노촉매 필터 및 그의 제조방법 - Google Patents
나노촉매 필터 및 그의 제조방법 Download PDFInfo
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- WO2014158009A1 WO2014158009A1 PCT/KR2014/002729 KR2014002729W WO2014158009A1 WO 2014158009 A1 WO2014158009 A1 WO 2014158009A1 KR 2014002729 W KR2014002729 W KR 2014002729W WO 2014158009 A1 WO2014158009 A1 WO 2014158009A1
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- nanocatalyst
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- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/86—Catalytic processes
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- B01D53/8628—Processes characterised by a specific catalyst
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- C25D9/00—Electrolytic coating other than with metals
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- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
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Definitions
- the present invention relates to a method for producing a nanocatalyst filter and a nanocatalyst filter produced by the method.
- the flue gas denitrification technology has been studied in the world for more than 30 years. Among them, selective catalytic reduction (SCR) is being used as the most effective technology, and a method of simultaneously treating dust and harmful gases by giving harmful gas removal performance to the ceramic filter for dust collection for operation cost and space saving is proposed. It is used.
- SCR selective catalytic reduction
- catalysts for removing NOx various catalysts such as vanadium oxide, zeolite, iron oxide, activated carbon, platinum, and palladium are used.
- dip coating or wash coating is generally used.
- Korean Patent Publication No. 10-2009-0065568 manufactures a reduction catalyst by a method of dip coating a catalyst on a disk-type ceramic filter, and in Korean Patent Publication No. 10-2007-0075044, the catalyst is cordierite honeycomb.
- a reduction catalyst is prepared by using a wash coating method, which is a method of spraying on a filter.
- the dip coating or wash coating has a disadvantage in that it is difficult to uniformly support the catalyst inside the filter when applied to a filter, for example, a disc type filter, which is being studied for dust and harmful gas equivalence treatment.
- the present invention aims to support the nanocatalyst inside the filter simply and efficiently using an electroplating method in order to uniformly support the nanocatalyst in the porous filter. In addition, it aims to improve the catalytic properties by maximizing the gas contact area by using a large specific surface area that is a characteristic of the nanostructure.
- the present invention provides a method for producing a nanocatalyst filter comprising electroplating a nanocatalyst precursor inside a porous filter to form a nanocatalyst.
- the present invention is prepared by the above-described method for producing a nanocatalyst filter, porous filter.
- nanocatalyst filter comprising a nanocatalyst formed inside the porous filter.
- the nanocatalyst filter according to the present invention is manufactured through electroplating, the nanocatalyst can be uniformly supported inside the porous filter, and high catalyst efficiency can be obtained even with a small amount of catalyst.
- Example 2 is a photograph of a disc-shaped cordierite filter used in Example 1 of the present invention.
- Example 3 is an X-ray diffraction pattern graph of the nanocatalyst filter prepared in Example 1 of the present invention.
- Example 4 is a scanning micrograph of the nanocatalyst filter prepared in Example 1 of the present invention.
- Example 5 is a scanning microscope photograph of a nanocatalyst filter prepared after electroplating in Example 1 of the present invention.
- Example 6 is a scanning microscope photograph of a nanocatalyst filter prepared after electroplating and calcining (heat treatment) in Example 1 of the present invention.
- Example 7 is a graph showing the NOx removal efficiency of the nanocatalyst filter prepared in Example 1 of the present invention.
- Example 8 is a photograph of a honeycomb ceramic filter used in Example 2 of the present invention.
- Example 9 is a photograph of a nanocatalyst filter prepared in Example 2 of the present invention.
- FIG. 10 is a scanning micrograph of the nanocatalyst filter prepared in Example 2.
- Example 11 is a graph showing the NOx removal efficiency of the nanocatalyst filter manufactured by Example 2 of the present invention.
- Example 12 is a transmission electron microscope (TEM) photograph of the nanocatalyst filter prepared in Example 3 of the present invention.
- Example 13 is a CeO 2 X-ray diffraction pattern graph of the nanocatalyst filter prepared in Example 3 of the present invention.
- Example 14 is a graph showing the NOx removal efficiency of the nanocatalyst filter prepared in Example 3 of the present invention.
- the present invention relates to a method for producing a nanocatalyst filter comprising electroplating a nanocatalyst precursor inside a porous filter to form a nanocatalyst.
- the nanocatalyst filter refers to a filter in which the nanocatalyst is formed in the internal pores of the porous filter.
- the porous filter has a porous structure inside the filter.
- the porous filter may have a porosity of 40% or less, specifically 30% or less, strength of 10 MPa or more, specifically 20 MPa or more, and a pressure loss value of 3000 Pa or less at a surface velocity of 5 cm / sec, specifically 2000 It may be less than or equal to Pa.
- the porosity was tested by the Archimedes method, the strength was measured by tensile strength equipment UTM (Universal Testing Machine), the pressure loss value was measured by using a manometer.
- the porous filter serves as a carrier, and the nanocatalyst is formed inside the filter by electroplating to have an excellent harmful gas treatment effect, specifically, nitric oxide removal effect.
- the kind of the porous filter is not particularly limited, and alumina (Alumina, Al 2 O 3 ), silica (Silica), mullite (3Al 2 O 3 ⁇ SiO 2 ), zeolite, zirconia, zirconia, ZrO 2 ), One or more selected from the group consisting of titanium dioxide (TiO 2 ), silicon carbide (SIC), and cordierite (2MgO 2 ⁇ Al 2 O 3 ⁇ SiO 2 ), Specifically, cordierite can be used.
- the shape of the porous filter is not particularly limited, and may be a disk or honeycomb type.
- the nanocatalyst is formed inside the porous filter as a nanocatalyst by electroplating starting from the nanocatalyst precursor.
- the kind of the nanocatalyst is not particularly limited and may be a metal oxide, a transition metal, a noble metal or a rare earth metal.
- the metal oxide is titanium oxide (TiO 2 ), cerium oxide (CeO 2 ), zirconium oxide (ZrO 2 ), magnesium oxide (MgO), copper oxide (CuO), tungsten oxide (WO 3 ), nickel oxide (NiO) x), cobalt oxide (CoO x), manganese (MnO x), vanadium oxide (VO x), iron oxide (FeO x), gallium oxide (GaO x), cesium (SeO x), or molybdenum oxide (MoO x
- the transition metal is scandium (Sc), titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), zirconium (Zr), niobium ( Nb), molybdenum (Mo), technetium (Tc), lead (Pb), bismuth (Bi), germanium (Ge) or zinc (Zn), and the precious metals are silver (Ag),
- the nanocatalyst precursor is a compound formed inside the ceramic filter in the form of a nanocatalyst by electroplating.
- the kind of the nanocatalyst precursor is not particularly limited, and may include one or more selected from the group consisting of a metal oxide precursor, a transition metal precursor, a noble metal precursor, and a rare earth metal precursor.
- the type of the metal oxide precursor, the transition metal precursor, the noble metal precursor and the rare earth metal precursor is not particularly limited as long as the above-described metal oxide, transition metal, noble metal and rare earth metal can be present in an ionic state in the electrolyte.
- NH 4 VO 3 or Ce (NO 3 ) 3 .6H 2 O may be used as the catalyst precursor.
- the formation of the nanocatalyst inside the porous filter may be performed using electroplating.
- the preparation of the nanocatalyst filter using electroplating may be performed using the method shown in FIG. 1.
- the nanocatalyst filter according to FIG. 1 may be prepared by first attaching an electrode layer to a porous filter, immersing the porous filter with the electrode layer in a plating bath filled with an electrolyte solution containing a catalyst precursor, and then electroplating. have.
- the nanocatalyst filter includes immersing a porous filter (porous filter having an electrode layer attached) in a plating bath filled with an electrolyte solution containing a nanocatalyst precursor and depressurizing it;
- the nanocatalyst may be deposited inside the porous filter by the above method.
- the concentration of the nanocatalyst precursor in the electrolyte is not particularly limited, and may be 0.01 to 30 mole, specifically 0.03 to 10 mole, more specifically 0.05 to 5 mole. Uniform deposition of the nanocatalyst into the porous filter in the above range is easy.
- the electrolyte may maintain a pH of 1 to 5 so that the nanocatalyst precursor is present as ions, specifically cations.
- the electrolyte solution may include an acid solution, and in this case, nitric acid, sulfuric acid, hydrochloric acid, boric acid, oxalic acid, acetic acid, phosphoric acid, or a mixture thereof may be used.
- Depressurizing in the present invention may be performed to facilitate the formation of the nanocatalyst by removing the air inside the porous filter.
- the decompression may be carried out in a low vacuum or vacuum state, the pressure range may be 100 kPa to 100 mPa, specifically 500 kPa to 50 mPa. In addition, the decompression may be performed for 10 minutes to 5 hours, specifically 30 minutes to 3 hours.
- Electroplating in the present invention can be carried out in the current range of 0.1 to 300 mA / cm 2 , specifically 1 to 40 mA / cm 2 . Uniform deposition of nanocatalyst precursors in the current range is facilitated. In addition, the electroplating may be performed for 10 minutes to 48 hours, specifically 3 hours to 24 hours. The time is different depending on the size or height of the porous filter, it is easy to uniform deposition of the nanocatalyst precursor in the above-described time range.
- after the electroplating may further comprise the step of firing (heat treatment).
- heat treatment heat treatment
- the firing is different depending on the type of nanocatalyst precursor, but can be generally performed at 100 to 1000 °C.
- the firing temperature is not particularly limited, and may be 1 to 24 hours, specifically 3 to 20 hours. It is possible to easily prepare a filter excellent in the catalytic activity in the above range.
- the present invention also relates to a nanocatalyst filter produced by the method for producing a nanocatalyst filter described above.
- Nanocatalyst filter according to the present invention is a porous filter
- It may include a nanocatalyst formed in the porous filter.
- the type of nanocatalyst in the present invention is not particularly limited and may be a metal oxide, a transition metal, a noble metal or a rare earth metal.
- the metal oxide is titanium oxide (TiO 2 ), cerium oxide (CeO 2 ), zirconium oxide (ZrO 2 ), magnesium oxide (MgO), copper oxide (CuO), tungsten oxide (WO 3 ), nickel oxide (NiO) x), oxide of cobalt (CoO x), manganese (MnO x), vanadium oxide (VO x), iron oxide (FeO x), gallium oxide (GaO x), cesium (SeO x), or molybdenum oxide (MoO x
- the transition metal is scandium (Sc), titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), zirconium (Zr), niobium ( Nb), molybdenum (Mo
- the structure of the nanocatalyst formed inside the porous filter is not particularly limited and may have, for example, a structure of nanowires or particles.
- the particle structure has an average particle diameter may be 1000 nm or less, specifically 500 nm or less, 100 nm or less, 5 nm or less, and the lower limit may be 1 nm or more.
- Cordierite (2MgO 2 Al 2 O 3 SiO 2 ) was used as the porous filter.
- the ceramic filter was attached to a platinum (Pt) electrode plate and then immersed in a plating bath. At this time, the plating bath is filled with an electrolyte solution containing ammonium vanadate (Nmon 4 VO 3 116.99 g / mol) of 0.05 mole concentration, the nitric acid (HNO 3 ) is added to the electrolyte solution to pH 1.2 to 2.5 Set to.
- the nitric acid (HNO 3 ) is added to the electrolyte solution to pH 1.2 to 2.5 Set to.
- the pressure inside the plating bath was reduced to 86 kPa for 20 minutes using a low vacuum pump, and then electroplated.
- the prepared filter was calcined at 600 ° C. for 1 hour.
- Figure 2 is an image of the cordierite filter used in Example 1.
- 2 (a) is an external photograph of the filter.
- Example 1 of the present invention as shown in 2 (a), a cordierite filter having a diameter of 25 mm and a height of 10 mm was used.
- 2 (b) is a scanning electron microscope (SEM) image of the inside of the filter, as shown in Figure 2 (b), the interior of the cordierite filter is a relatively uniform pores of several ⁇ m or more formed can confirm.
- SEM scanning electron microscope
- 3 is an X-ray diffraction pattern graph of the nanocatalyst filter prepared in Example 1 of the present invention.
- 3 (a) is an X-ray diffraction pattern graph of the filter prepared after electroplating
- 3 (b) Is an X-ray diffraction pattern graph after firing (heat treatment) at 600 ° after electroplating.
- FIG. 3 it can be seen that (a) vanadium oxide (VO x ) crystals were formed after electroplating, and (b) after calcination, vanadium pentoxide (V 2 O 5 ) crystals were formed.
- Figure 4 is a scanning micrograph of the nanocatalyst microstructure prepared in Example 1 of the present invention. As shown in Figure 4, it can be confirmed that the specific surface area is formed of a nanofiber (nano fiber) structure.
- 5 is a scanning microscope photograph of a nanocatalyst filter prepared after electroplating in Example 1 of the present invention. Specifically, 5 (a) is a scanning microscope picture of the surface of the filter, 5 (b) is a scanning microscope picture of the inside of the filter, it can be confirmed that the VO x well generated from the filter surface and the inside through FIG.
- 6 is a scanning microscope photograph of a nanocatalyst filter prepared after electroplating and calcining (heat treatment) in Example 1 of the present invention. Specifically, 6 (a) is a filter surface scanning microscope picture, 6 (b) is a scanning microscope picture of the inside of the filter, it is confirmed that the V 2 O 5 is formed in the nanowire structure inside the pores of the filter through FIG. Can be.
- Table 1 shows that the VOx nanocatalyst was supported by 10 wt% or more by X-ray fluorescence (XRF) analysis data of the nanocatalyst filter prepared in Example 1.
- XRF X-ray fluorescence
- Figure 7 is a graph showing the NO x removal efficiency of the nanocatalyst filter prepared in Example 1 of the present invention, specifically, 7 (a) after the electroplating and 7 (b) is electroplating Is a graph showing the removal efficiency of nitrogen oxide (NO x ) after firing (heat treatment). As shown in FIG. 7, the NO x removal efficiency is 53% before firing and 76% after firing, and it can be confirmed that the nitrogen oxide removal efficiency after firing is excellent.
- a filter was manufactured in the same manner as in Example 1, except that the honeycomb type ceramic filter was used as the porous filter.
- Example 8 is a honeycomb porous filter photograph used in Example 2 of the present invention.
- FIG. 9 is a photograph of a nanocatalyst filter after electroplating by the method of Example 2 of the present invention. Specifically, 9 (a) is an outer photograph of the manufactured filter, and 9 (b) is an inner photograph.
- 10 is a scanning microscope picture of the nanocatalyst filter prepared in Example 2, specifically, 10 (a) is a scanning microscope picture of the honeycomb ceramic filter after the electroplating, 10 (b) is electroplating It is a scanning microscope photograph of the honeycomb-type ceramic filter after carrying out and calcining (heat treatment). As shown in FIG. 10 (b), it can be seen that V 2 O 5 has a nanowire structure inside the pores of the filter after firing.
- Table 2 can be confirmed that the X-ray fluorescence (XRF; X-ray Fluorescence) analysis data of the nanocatalyst filter prepared in Example 2 was loaded with more than 14 wt% of VO x nanocatalyst.
- XRF X-ray Fluorescence
- Figure 11 is a graph showing the NO x removal efficiency of the nanocatalyst filter prepared in Example 2 of the present invention, specifically, 11 (a) after the electroplating and 11 (b) is electroplating
- 11 (a) after the electroplating and 11 (b) is electroplating Is a graph showing the removal efficiency of nitrogen oxide (NO x ) after firing (heat treatment). As shown in FIG. 11, the NO x removal efficiency was measured to be 97% before firing and 99% after firing.
- a disk filter was used as the porous filter.
- the filter was attached to an electrode plate and then immersed in a plating bath. At this time, the plating bath is filled with Cerium (III) nitrate and 6-hydrate (Ce (NO 3 ) 3 H 2 O g / mol) electrolyte at 1 mole concentration, and the pH is 1.2 to 3.5 by adding nitric acid (HNO 3 ). Set to.
- the pressure inside the plating bath was reduced to 86 kPa for 20 minutes using a low vacuum pump, and then electroplated.
- FIG. 12 is a transmission electron microscope (TEM) photograph of a nanocatalyst filter prepared according to Example 3 of the present invention. As shown in FIG. 12, it can be confirmed that the nanocatalyst of 5 nm or less is formed in a particle structure within the filter.
- TEM transmission electron microscope
- FIG. 13 is a graph of CeO 2 X-ray diffraction pattern of the nanocatalyst filter prepared in Example 3 of the present invention, and it can be seen from FIG. 13 that cerium oxide is formed in the pores of the filter.
- Table 3 below shows that the CeO 2 nanocatalyst was supported by 28 wt% or more by X-ray fluorescence (XRF) analysis data of the nanocatalyst filter prepared in Example 3 of the present invention.
- XRF X-ray fluorescence
- Figure 14 is a graph showing the NO x removal efficiency of the nanocatalyst filter prepared in Example 3 of the present invention, specifically, 14 (a) after the electroplating and 14 (b) is electroplating Is a graph showing the removal efficiency of nitrogen oxide (NO x ) after firing (heat treatment). NO x removal efficiencies were measured at 93% before firing and 95% after firing.
- NO x nitrogen oxide
- the nanocatalyst filter according to the present invention can be used for the removal of harmful gases (nitrogen oxides (NOx), etc.).
- harmful gases nitrogen oxides (NOx), etc.
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Abstract
Description
| Material | MgO | Al2O3 | SiO2 | VOx | Etc. |
| As-deposition | 8.05 | 29.8 | 48.6 | 10.5 | 3.05 |
| Annealed 600 ℃ | 7.91 | 29.2 | 47.5 | 12.3 | 3.09 |
| Material | MgO | Al2O3 | SiO2 | VOx | Etc. |
| As-deposition | 7.71 | 27.3 | 46.0 | 14.0 | 4.99 |
| Annealed 600 ℃ | 7.26 | 26.1 | 43.0 | 18.3 | 5.34 |
| Material | MgO | Al2O3 | SiO2 | CeO2 | Etc. |
| As-deposition | 6.85 | 24.8 | 36.8 | 28.8 | 2.75 |
| Annealed 500 ℃ | 6.57 | 23.8 | 35.2 | 31.4 | 3.03 |
Claims (14)
- 다공성 필터 내부에 나노촉매 전구체를 전기도금하여 나노촉매를 형성하는 단계를 포함하는 나노촉매 필터의 제조 방법.
- 제 1 항에 있어서,다공성 필터의 재질은 알루미나, 실리카, 뮬라이트, 제올라이트, 지르코니아, 산화티타늄, 실리콘카바이드 및 코디어라이트로 이루어진 그룹으로부터 선택되는 나노촉매 필터의 제조 방법.
- 제 1 항에 있어서,다공성 필터의 형태는 디스크형 또는 허니컴형인 나노촉매 필터의 제조 방법.
- 제 1 항에 있어서,나노촉매는 금속 산화물, 전이금속, 귀금속 및 희토류 금속으로 이루어진 그룹으로부터 선택되는 나노촉매 필터.
- 제 1 항에 있어서,나노촉매 전구체는 금속 산화물 전구체, 전이금속 전구체, 귀금속 전구체 및 희토류 금속 전구체로 이루어진 그룹으로부터 선택되는 나노촉매 필터의 제조 방법.
- 제 1 항에 있어서,나노촉매 전구체를 함유하는 전해액으로 채워진 도금조에 다공성 필터를 침지하고, 감압하는 단계; 및전기도금을 수행하는 단계를 포함하는 나노촉매 필터의 제조 방법.
- 제 6 항에 있어서,나노촉매 전구제의 농도는 0.01 내지 30 mole인 나노촉매 필터의 제조 방법.
- 제 6 항에 있어서,전해액의 pH는 1 내지 5인 나노촉매 필터의 제조 방법.
- 제 6 항에 있어서,감압하는 단계는 100 kPa 내지 100 mPa의 압력에서 수행하는 나노촉매 필터의 제조 방법.
- 제 6 항에 있어서,감압하는 단계는 10 분 내지 5 시간 동안 수행하는 나노촉매 필터의 제조 방법.
- 제 6 항에 있어서,전기도금은 0.1 내지 300 mA/cm2에서 수행하는 나노촉매 필터의 제조 방법.
- 제 6 항에 있어서,전기도금은 10 분 내지 48 시간 동안 수행하는 나노촉매 필터의 제조 방법.
- 제 1 항에 있어서,전기도금을 수행한 후, 50 내지 1000℃에서 1 내지 24 시간 동안 소성하는 단계를 추가로 포함하는 나노촉매 필터의 제조 방법.
- 제 1 항에 따른 나노촉매 필터의 제조 방법에 의해 제조되고,다공성 필터; 및상기 다공성 필터 내부에 형성된 나노촉매를 포함하는 나노촉매 필터.
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| EP14773655.7A EP2979741A4 (en) | 2013-03-29 | 2014-03-31 | Nanocatalyst filter and production method for same |
| JP2016505412A JP6329245B2 (ja) | 2013-03-29 | 2014-03-31 | 窒素酸化物除去用のナノ触媒フィルター |
| US14/779,837 US20160060782A1 (en) | 2013-03-29 | 2014-03-31 | Nano-catalyst filter and production method for same |
| US16/440,145 US11071946B2 (en) | 2013-03-29 | 2019-06-13 | Nano-catalyst filter and production method for same |
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| KR10-2013-0034022 | 2013-03-29 |
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| US16/440,145 Continuation-In-Part US11071946B2 (en) | 2013-03-29 | 2019-06-13 | Nano-catalyst filter and production method for same |
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| JP (1) | JP6329245B2 (ko) |
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| KR101610757B1 (ko) | 2015-11-24 | 2016-04-08 | 주식회사 세일에프에이 | 구리-망간 촉매가 함유된 유해가스 제거용 복합 조성물 |
| KR101733171B1 (ko) | 2016-06-21 | 2017-05-08 | 한국생산기술연구원 | 다공극성 금속 구조체 상에 성장된 세라믹 나노튜브를 이용한 선박용 탈질 촉매 및 그의 제조방법 |
| KR20180064929A (ko) * | 2016-12-06 | 2018-06-15 | 한국생산기술연구원 | 다공극성 세라믹 3차원 입체 망상 구조체를 이용한 선박용 탈질 촉매 및 그의 제조방법 |
| US10040057B1 (en) * | 2017-07-06 | 2018-08-07 | Uchicago Argonne, Llc | Catalytic nanosheets to lower soot light off temperatures, method for making nanosheets to lower soot light off temperatures |
| KR102058740B1 (ko) | 2018-06-27 | 2019-12-23 | 서울대학교산학협력단 | 미세먼지 제거용 3차원 필터 및 이의 제조방법 |
| KR102097550B1 (ko) * | 2018-10-12 | 2020-05-26 | 영남대학교 산학협력단 | 배가스 탈질 폐촉매를 이용한 수퍼캐패시터의 제조방법 |
| CN109091956B (zh) * | 2018-10-15 | 2020-12-08 | 安徽元琛环保科技股份有限公司 | 一种基于陶瓷纤维的除尘脱硝一体化滤料的制备方法 |
| JP7353810B2 (ja) * | 2019-06-17 | 2023-10-02 | 古河電気工業株式会社 | 複合材、排ガス浄化用触媒及び複合材の製造方法 |
| CN111871070B (zh) * | 2019-11-12 | 2021-02-19 | 南京工业大学 | 一种一体化滤料 |
| KR102800824B1 (ko) * | 2022-06-21 | 2025-05-02 | 주식회사 에이치에스이 | 해양선박용 배기가스 저감장치 |
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| JP2006513856A (ja) * | 2003-03-05 | 2006-04-27 | スリーエム イノベイティブ プロパティズ カンパニー | 触媒性フィルターおよび製造方法 |
| KR20060039276A (ko) * | 2004-11-02 | 2006-05-08 | 한국에너지기술연구원 | 나노필터 여재 제조 방법과 제조 장치 |
| KR100692191B1 (ko) * | 2005-10-25 | 2007-03-09 | 심종섭 | 금속 및 세라믹 담체 표면에 입체 구조를 갖는 산화물 촉매제조방법 |
| KR20070075044A (ko) | 2006-01-11 | 2007-07-18 | 에스케이 주식회사 | 환원제를 이용한 질소산화물 제거용 촉매 및 그의 제조방법 |
| KR20090065568A (ko) | 2007-12-18 | 2009-06-23 | (주)신텍 | 캔들형 세라믹 필터에 촉매를 코팅하는 방법 |
| KR20100127832A (ko) * | 2008-03-20 | 2010-12-06 | 더 유니버시티 오브 아크론 | 나노크기 금속 촉매 입자를 함유하는 세라믹 나노섬유 및 이의 매체 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101460437B1 (ko) | 2014-11-12 |
| EP2979741A1 (en) | 2016-02-03 |
| US20160060782A1 (en) | 2016-03-03 |
| EP2979741A4 (en) | 2017-03-29 |
| KR20140119331A (ko) | 2014-10-10 |
| JP2016521201A (ja) | 2016-07-21 |
| JP6329245B2 (ja) | 2018-05-23 |
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