Deactivation Behavior of Co/SiC Fischer-Tropsch Catalysts by Formation of Filamentous Carbon

Title
Deactivation Behavior of Co/SiC Fischer-Tropsch Catalysts by Formation of Filamentous Carbon
Authors
이발상구현모박명준임병권문동주윤기준배종욱
Keywords
Fischer?Tropsch synthesis; Cobalt; Silicon carbide; Alumina modification; Filamentous carbon; Deactivation
Issue Date
2013-01
Publisher
Catalysis letters
Citation
VOL 143, NO 1, 18-22
Abstract
Silicon carbide (SiC) having high thermal conductivity and macro-porosity was investigated for the Fischer–Tropsch Synthesis (FTS) reaction over Co-based catalysts in order to elucidate its support effects by surface modification with alumina. Even at a low temperature of around 230 C, filamentous carbon formation was observed on the unmodified Co/SiC catalyst possessing large cobalt crystallites with a weak metal–support interaction. On the contrary, the cobalt catalyst supported on the alumina-modified SiC was found to be superior with respect to the CO conversion and stability. Even though the dispersion of cobalt oxides on the alumina-modified SiC support was not significantly improved, the remarkable performance improvements of the alumina-modified Co/SiC catalyst were mainly attributed to the enhanced metal–support interaction by the added alumina which suppressed the filamentous carbon formation.
URI
http://pubs.kist.re.kr/handle/201004/45886
ISSN
1011372X
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