| 학회 |
한국화학공학회 |
| 학술대회 |
2004년 봄 (04/23 ~ 04/24, 공주대학교) |
| 권호 |
10권 1호, p.972 |
| 발표분야 |
촉매/반응공학 |
| 제목 |
Mechanism of deactivation of iron based catalyst in carbon dioxide to hydrocarbon |
| 초록 |
The compositions of iron-based catalysts are deactivated significantly during CO2 hydrogenation due to mainly catalyst poisoning as well as carbon deposit. The formation and composition of these iron phases depend on the process conditions, catalyst deactivation, and catalyst composition. The catalytic activity of each of these phases with respect to the CO2 hydrogenation is still controversial. We report the results of a detailed investigation of deactivated Fe-K/γ-Al2O3 catalyst. The characterizations of deactivated catalyst were also carried out to provide information on the deactivation pathway as function of time and catalyst position. The deactivation occurred on Fe-K/γ-Al2O3 during the reaction, although the long run activity was 35% above. As the time progress, the hematite (Fe3O4), formed after H2 reductions, is gradually carburized to χ-Fe5C2. Finally, χ-Fe5C2 phase is converted to θ-Fe3C, which is inactive species for CO2 hydrogenation. The deactivation of the bottom part in reactor is coke deposit due to adsorption of the produced hydrocarbon. |
| 저자 |
이성철1, 조자경1, 김동진1, 강미숙1, 최명재2, 정석진1
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| 소속 |
1경희대, 2한국화학(연) |
| 키워드 |
deactivation; carbon dioxide
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| E-Mail |
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| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
