| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.895 |
| 발표분야 |
촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 |
New SiO2@V2O5@Al2O3 core@shell catalysts for selective oxidation of methane to formaldehyde |
| 초록 |
As a technology that utilizes abundant natural gas resources, it is very important to develop catalysts that directly convert methane into high value-added chemicals. Stable molecular structure and high C–H bond dissociation energy require excessive thermal reaction conditions, and these harsh thermal system produces additional carbon dioxide due to overoxidation. Herein, we develop the novel SiO2@V2O5@Al2O3 core@shell nanostructure as a catalyst for selective oxidation of methane to formaldehyde. The new core@shell catalysts are prepared by the hydrothermal synthesis and subsequent atomic layer deposition (ALD). The core SiO2@V2O5 nanostructures are coated by Al2O3 shell through multiple ALD cycles, enhancing catalytic activity and thermal stability in the methane partial oxidation. The highest catalytic activity (CH4 conversion = 22.2%; HCHO selectivity = 57.8%) at 600 °C is shown in the core@shell catalyst prepared by 50 ALD cycles. In situ XRD, H2-TPR, Raman, and UV-Vis characterizations demonstrate that the new Td monomeric vanadium species with V–O–Al bond is responsible for the high methane conversion. |
| 저자 |
양의섭1, 이준경1, 김동현2, 정윤석3, 곽자훈1, 박은덕4, 안광진1
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| 소속 |
1울산과학기술원, 2울산과학기술원 / 한양대, 3한양대, 4아주대 |
| 키워드 |
촉매 |
| E-Mail |
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| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
