| 학회 |
한국화학공학회 |
| 학술대회 |
2008년 봄 (04/23 ~ 04/25, 제주ICC) |
| 권호 |
14권 1호, p.1434 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Models for acetylene chemisorption on different active sites on carbon black |
| 초록 |
In order to characterize the catalytically active sites on carbon black for hydrocarbon decomposition, acetylene adsorption was examined at 873 K by using a pulse technique. As the injection was repeated at 873 K a constant amount of C2H2 was consumed at each pulse after several injections. A reasonable model had recently been proposed for the constant acetylene consumption on the armchair face at the edges of graphene layers. The constant consumption can be explained by the "acetylene - chemisorption - hydrogen - abstraction(ACHA)" mechanism and can also explain the stable activity of carbon blacks. The proposed chemisorption schemes on other types of active sites such as the zigzag face and corners are similar with some differences in the early stages : that is, they involve five-member or seven-member rings at initial steps and eventually these rings are transformed into six-member rings by combining with other acetylene molecules that are chemisorbed in the neighbourhood. |
| 저자 |
곽정훈, 김미소, 이상엽, 윤기준
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| 소속 |
성균관대 |
| 키워드 |
Carbon black; acetylene chemisorption; active site
|
| E-Mail |
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| 원문파일 |
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