Importance of graphitic alignment in carbon nanostructure for simultaneously achieving high activity and stability in oxidative dehydrogenation = 산화 탈수소화 반응에서 높은 활성과 안정성을 위한 탄소 구조의 중요성에 관한 연구

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Carbons have been extensively investigated in recent years to explore their catalytic functions in oxidative dehydrogenations (ODH). Limited numbers of carbons have been directly compared under the same ODH condition, which makes their direct comparison impossible. This makes us difficult to understand a prime carbon design rule for simultaneously achieving high catalytic activity and stability. In this work, we investigated the catalytic properties of various carbons including an activated carbon, carbon nanotubes, onion-like carbons, and templated carbons in n-butane ODH. Regardless of the types of carbon structure, catalytic activities were linearly proportional to the number of quinone-type (C=O) functional groups, whereas the catalyst stability was correlated with the carbon oxidation stability. Because more C=O active sites are present in thermally unstable amorphous carbons, the carbon catalysts generally showed a trade-off between the catalytic activity and stability. However, a graphitic mesoporous carbon (CMK-3G) with the ‘coin-stacking’ of carbon layers showed high catalytic activity and stability simultaneously. This may be due to the fact that ‘coin-stacking’ of carbon layers allows a graphitic order of carbon framework as well as a large number of carbon edge sites where the C=O groups can be located.
Advisors
Choi, Minkeeresearcher최민기researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2016
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2016.8,[iii, 24 p. :]

Keywords

Carbon catalyst▼aoxidative dehydrogenation; 탄소 촉매▼a산화 탈수소화

URI
http://hdl.handle.net/10203/266394
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=849887&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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