KR20120104722A - Co2 개질용 촉매, 그 제조 방법 및 co2 개질 방법 - Google Patents
Co2 개질용 촉매, 그 제조 방법 및 co2 개질 방법 Download PDFInfo
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- KR20120104722A KR20120104722A KR1020110022296A KR20110022296A KR20120104722A KR 20120104722 A KR20120104722 A KR 20120104722A KR 1020110022296 A KR1020110022296 A KR 1020110022296A KR 20110022296 A KR20110022296 A KR 20110022296A KR 20120104722 A KR20120104722 A KR 20120104722A
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Abstract
Description
도 2는 촉매 금속이 물리적 또는 화학적으로 흡착되어 다공성 담체에 담지된 촉매(도 2a)의 경우와 담체와 촉매 금속 사이에 얼로이 형태의 결합을 형성하여 담지된 촉매(도 2b)의 경우에 있어서, 각각 하나의 촉매 금속 입자에 대하여 그 형상의 특징이 잘 나타나도록 과장되게 확대하여 나타낸 도면이다.
도 3은 담체에 담지된 촉매 금속이 CO2 개질 반응 참여 후 신터링에 의해 입자가 변화하는 것을 모식적으로 도시한 것이다.
도 4는 실시예 1의 촉매의 3차원의 3D TEM 이미지이다.
도 5는 비교예 1의 촉매의 3차원의 3D TEM 이미지이다.
도 6은 실시예 1 및 비교예 1에서 제조된 CO2 개질용 촉매를 실험예 1의 건식 CO2 개질 반응을 수행시 시간에 따른 CH4 및 CO2의 전환율을 보여주는 그래프이다.
도 7은 실시예 1 및 비교예 1에서 제조된 CO2 개질용 촉매를 실험예 2의 건식 CO2 개질 반응을 수행시 시간에 따른 CH4 및 CO2의 전환율을 보여주는 그래프이다.
도 8은 실시예 1의 촉매에 대하여 실험예 2의 개질 반응 참여 후 배율을 달리하여 찍은 SEM 사진이다.
도 9는 비교예 1의 촉매에 대하여 실험예 2의 개질 반응 참여 후 배율을 달리하여 찍은 SEM 사진이다
도 10은 실시예 1과 비교예 1의 촉매에 대하여 실험예 2의 습식 개질 반응 참여 후의 열중량분석 그래프이다.
도 12은 실시예 1의 촉매에 대한 TEM 및 STEM 이미지이다.
도 13의 비교예 1의 촉매에 대한 TEM 및 STEM 이미지이다.
Ni 입자의 평균 크기 (nm) | ||
실시예 1 | 비교예 1 | |
개질 반응 참여 전 | 16 | 6.4 |
실험예 1의 개질 반응 참여 후 | 16 | 9 |
실험예 2의 개질 반응 참여 후 | 16 | 11 |
Claims (13)
- Ni, Co, Cr, Mn, Mo, Ag, Cu, Zn 및 Pd으로 이루어진 군으로부터 선택된 적어도 하나인 촉매 금속이 다공성 담체에 얼로이(alloy) 형태로 결합됨으로써 담지되어 형성되고, 상기 촉매 금속과 상기 다공성 담체의 결합면의 수직방향 단면에서 상기 촉매 금속은 직선으로 절단된 원 또는 타원 형상을 형성하고, 상기 원의 반지름을 r, 상기 타원형의 장반경을 ra, 상기 타원의 단반경을 rb라고 하면, ra>rb이고, 상기 원 또는 타원을 절단하는 직선으로부터 수직한 높이 h는 h<2r 또는 h<2ra인 CO2 개질용 촉매.
- 제1항에 있어서,
상기 직선으로 절단된 원 또는 타원 형상은 반구형 또는 반구 타원형의 형상인 것인 CO2 개질용 촉매. - 제1항에 있어서,
상기 다공성 담체는 알루미나, 티타니아, 세리아 및 실리카 옥사이드로 이루어진 군으로부터 선택된 적어도 하나인 것인 CO2 개질용 촉매. - 제1항에 있어서,
상기 CO2 개질용 촉매는 하기 반응식 5의 CO2 개질 반응에 참여하는 것인 CO2 개질용 촉매.
[반응식 5]
3CH4 + CO2 + 2H2O → 4CO + 8H2 - 제4항에 있어서,
상기 CO2 개질용 촉매가 700 내지 850℃에서 10 내지 100 시간 동안 CO2 개질 반응에 촉매로서 참여한 뒤 상기 촉매 금속의 무작위 방향의 입자 직경의 크기 변화가 촉매로서 상기 CO2 개질 반응에 참여하기 전 대비 5 내지 10%의 성장율을 갖는 CO2 개질용 촉매. - 제4항에 있어서,
상기 CO2 개질용 촉매는 CO2 개질 반응에 촉매로서 참여하기 전 촉매 금속 입자의 최장 직경의 평균이 2 내지 20nm 인 CO2 개질용 촉매. - 제4항에 있어서,
상기 CO2 개질 반응은 물을 포함하여 수행되는 것인 CO2 개질용 촉매. - 제1항에 있어서,
상기 다공성 담체의 비표면적이 20 내지 500 m2/g인 것인 CO2 개질용 촉매. - 제1항에 있어서,
상기 촉매 금속의 담지 농도가 1 내지 15wt%인 CO2 개질용 촉매. - 다공성 담체를 Ni, Co, Cr, Mn, Mo, Ag, Cu, Zn 및 Pd으로 이루어진 군으로부터 선택된 적어도 하나인 촉매 금속의 전구체 용액과 혼합하여 소성하여 다공성 담체에 담지된 촉매 금속을 제조하는 단계;
상기와 같이 제조된 다공성 담체에 담지된 촉매 금속을 산화 및 환원시켜 상기 촉매 금속을 활성화시키는 단계;
상기 다공성 담체에 담지된 활성화된 촉매 금속을 물에 함침시키는 단계; 및
상기 물에 함침된 다공성 담체에 담지된 촉매 금속으로부터 수소 분위기하에서 물을 증발시켜 환원시킴으로써 촉매 금속을 다공성 담체에 얼로이(alloy) 형태로 결합시키는 단계를 포함하는 CO2 개질용 촉매의 제조 방법. - 제10항에 있어서,
상기 촉매 금속을 다공성 담체에 얼로이(alloy) 형태로 결합된 후, 상기 촉매 금속과 상기 다공성 담체의 결합면의 수직방향 단면에서 상기 촉매 금속은 상기 촉매 금속은 직선으로 절단된 원 또는 타원 형상을 형성하고, 상기 원의 반지름을 r, 상기 타원형의 장반경을 ra, 상기 타원의 단반경을 rb라고 하면, ra>rb이고, 상기 원 또는 타원을 절단하는 직선으로부터 수직한 높이 h는 h<2r 또는 h<2ra인 CO2 개질용 촉매의 제조 방법. - 제10항에 있어서,
상기 물에 함침된 다공성 담체에 담지된 촉매 금속으로부터 수소 분위기하에서 물을 증발시켜 환원시키는 단계를 500 내지 850℃에서 수행하는 CO2 개질용 촉매의 제조 방법. - Ni, Co, Cr, Mn, Mo, Ag, Cu, Zn 및 Pd으로 이루어진 군으로부터 선택된 적어도 하나인 촉매 금속이 다공성 담체에 얼로이(alloy) 형태로 결합됨으로써 담지되어 형성되고, 상기 촉매 금속과 상기 다공성 담체의 결합면의 수직방향 단면에서 상기 촉매 금속은 직선으로 절단된 원 또는 타원 형상을 형성하고, 상기 원의 반지름을 r, 상기 타원형의 장반경을 ra, 상기 타원의 단반경을 rb라고 하면, ra>rb이고, 상기 원 또는 타원을 절단하는 직선으로부터 수직한 높이 h는 h<2r 또는 h<2ra인 CO2 개질용 촉매를 하기 반응식 5의 반응물인 메탄, CO2 및 물과 함께 촉매 반응시켜 CO2를 개질하는 방법.
[반응식 5]
3CH4 + CO2 + 2H2O → 4CO + 8H2
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KR1020110022296A KR20120104722A (ko) | 2011-03-14 | 2011-03-14 | Co2 개질용 촉매, 그 제조 방법 및 co2 개질 방법 |
US13/268,263 US20120237432A1 (en) | 2011-03-14 | 2011-10-07 | Co2 reforming catalyst, method of preparing the same, and method of reforming co2 using the catalyst |
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Cited By (3)
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US9371235B2 (en) | 2013-03-11 | 2016-06-21 | Samsung Electronics Co., Ltd. | Method for preparing graphene |
US9498769B2 (en) | 2013-04-09 | 2016-11-22 | Samsung Electronics Co., Ltd. | Catalysts for carbon dioxide reforming of hydrocarbons |
CN109755600A (zh) * | 2019-01-29 | 2019-05-14 | 天津大学 | 碳布负载镍钴氧纳米片复合材料及其制备方法和电极的应用 |
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KR101885247B1 (ko) | 2012-07-26 | 2018-08-03 | 삼성전자주식회사 | Co2 개질용 촉매, 그 제조 방법, 및 co2 개질 방법 |
FR3007427B1 (fr) * | 2013-06-20 | 2016-07-01 | Ifp Energies Now | Couche active a base de particules metalliques sur support conducteur poreux, methode de fabrication et utilisation en tant que cathode pour l'electroreduction de dioxyde de carbone. |
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CA2364212A1 (en) * | 2001-12-03 | 2003-06-03 | The University Of Western Ontario | Catalyst for hydrocarbon reforming reaction |
KR20020041346A (ko) * | 2002-02-26 | 2002-06-01 | 김문찬 | 촉매의 성능향상 및 비활성화 저감을 위한 물 및가스처리방법 |
US20040077496A1 (en) * | 2002-07-26 | 2004-04-22 | Shizhong Zhao | Catalyst |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US9371235B2 (en) | 2013-03-11 | 2016-06-21 | Samsung Electronics Co., Ltd. | Method for preparing graphene |
US9536735B2 (en) | 2013-03-11 | 2017-01-03 | Samsung Electronics Co., Ltd. | Method for preparing graphene |
US9498769B2 (en) | 2013-04-09 | 2016-11-22 | Samsung Electronics Co., Ltd. | Catalysts for carbon dioxide reforming of hydrocarbons |
CN109755600A (zh) * | 2019-01-29 | 2019-05-14 | 天津大学 | 碳布负载镍钴氧纳米片复合材料及其制备方法和电极的应用 |
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