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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 이규복
- 발행연도
- 2020
- 저작권
- 충남대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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The development of alternative renewable energy sources has drawn broad attentions. Hydrogen is considered as a highly efficient and low polluting fuel that can be used in small mobile devices, transportations, and buildings. Currently, the production of hydrogen energy is widely based on steam reforming of methane (SMR) as the efficient and the least expensive technology. Ni-based catalysts are known as the best and the most commonly used catalysts for SMR reaction because of their acceptably high reaction activity and
significantly lower cost in comparison with precious metal-based catalysts. However, Ni catalysts are easily deactivated by carbon deposition and sintering at the high reaction temperature. Mg-aluminate is considered to be an excellent catalyst support with its high thermal stability, good chemical stability, mechanical strength and especially surface basic sites which enhance the coke resistance. In this study, Mg-aluminate with mesoporosity and spinel structure was developed, which is hard to achieve by widely used solid-state reactions and solution chemistry route in conventional way. Here an evaporation induced self-assembly (EISA) method was used to generate well-ordered mesopores in One-Pot synthesis method. O-NMA-Cz catalyst was the
catalytic activity of CH4 conversion was tested in SMR reaction. While O-NMA-Cz showed higher BET surface and pore volume originated from the higher sintering resistance than I-NMA. It is speculated that there is
satisfy both of basicity and mesoporosity, which should be simultaneously considered for high catalytic activity in SMR reaction.
significantly lower cost in comparison with precious metal-based catalysts. However, Ni catalysts are easily deactivated by carbon deposition and sintering at the high reaction temperature. Mg-aluminate is considered to be an excellent catalyst support with its high thermal stability, good chemical stability, mechanical strength and especially surface basic sites which enhance the coke resistance. In this study, Mg-aluminate with mesoporosity and spinel structure was developed, which is hard to achieve by widely used solid-state reactions and solution chemistry route in conventional way. Here an evaporation induced self-assembly (EISA) method was used to generate well-ordered mesopores in One-Pot synthesis method. O-NMA-Cz catalyst was the
catalytic activity of CH4 conversion was tested in SMR reaction. While O-NMA-Cz showed higher BET surface and pore volume originated from the higher sintering resistance than I-NMA. It is speculated that there is
satisfy both of basicity and mesoporosity, which should be simultaneously considered for high catalytic activity in SMR reaction.
목차
1. 서론 11.1 연구배경 11.2 연구 필요성 및 목표 22. 문헌 조사 42.1. 추출 수소 생산 기술 현황 42.2. 수증기 메탄 개질 기술 62.3 Ni 촉매를 활용한 개질 반응 92.3.1. Ni 촉매 문제점 92.3.2. 문제 해결을 위한 선행연구 122.4. 메조 다공성 Mg-alumina 152.5. Exsolution 방법을 이용한 촉매 합성 173. 실험 183.1. 촉매합성 183.1.1. 시약 및 재료 183.1.2. Mg-aluminate 지지체 합성 및 Ni 함침 183.1.3. 단일공정을 통한 Ni/Mg-aluminate 촉매 합성 203.1.4. Bimetallic CoNi/Mg-aluminate 촉매 합성 213.1.5. Wash Coating을 이용한 SiC pellet 활용 223.2. SMR 반응 253.2.1. 반응기 구성 253.2.2. SMR 반응 253.3. 특성 평가 274. 결과 및 고찰 284.1. 합성 조건별 Ni/Mg-aluminate 촉매의 기공구조 특성 284.2. 합성 조건별 Ni/Mg-aluminate 촉매의 결정구조 특성 354.3. 환원에 따른 Ni/Mg-aluminate 촉매의 결정구조 특성 374.4. Ni/Mg-aluminate 촉매의 환원 특성 394.5. Ni/Mg-aluminate 촉매의 염기 특성 414.6. Ni/Mg-aluminate 촉매의 SMR 반응 및 CH4 전환률 435. 결론 51참고문헌 52Abstract 62
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