DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Chon, Hak-Ze | - |
dc.contributor.advisor | 전학제 | - |
dc.contributor.author | Lee, Sang-Ick | - |
dc.contributor.author | 이상익 | - |
dc.date.accessioned | 2011-12-13T04:59:26Z | - |
dc.date.available | 2011-12-13T04:59:26Z | - |
dc.date.issued | 1993 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=68368&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/32638 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 화학과, 1993.2, [ vi, 71 p. ] | - |
dc.description.abstract | It was reported that the characteristics of cobalt - supported catalyst present a marked contrast with the methods of preparation, and in the case of Co/$SiO_2$, several kinds of cobalt species are formed after calcination. Catalysts were prepared by an impregnation method using cobalt acetate and cobalt nitrate. Physicochemical characterization of prepared Co/$SiO_2$ catalysts by cobalt acetate and cobalt nitrate were carried out to reveal the interaction between cobalt and $SiO_2$ about using PAS, XRD, TPDe, TPR, IR techniques. Interaction modes between cobalt and silica present a contrast with the nature of anions of cobalt source. It was found that several kinds of cobalt species are formed on Co/$SiO_2$. These species are assigned to $Co_3O_4$, mixed oxide, and $Co^{2+}$ in Td. Their proportions strongly depend on the starting salt, cobalt content, and preparation method. In either case, cobalt has octahedral symmetry before calcination, but in the case of Co/$SiO_2$ (A), it changes tetrahedral symmetry during calcination. These results are interpreted to be related to the interaction modes of cobalt-silica and cobalt-anion. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.title | Characterization of cobalt-supported catalyst | - |
dc.title.alternative | 코발트담지 촉매에 대한 특성 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 68368/325007 | - |
dc.description.department | 한국과학기술원 : 화학과, | - |
dc.identifier.uid | 000911431 | - |
dc.contributor.localauthor | Chon, Hak-Ze | - |
dc.contributor.localauthor | 전학제 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.