DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Park, Seung-Bin | - |
dc.contributor.advisor | 박승빈 | - |
dc.contributor.author | Koo, Kee-Young | - |
dc.contributor.author | 구기영 | - |
dc.date.accessioned | 2011-12-13T01:40:39Z | - |
dc.date.available | 2011-12-13T01:40:39Z | - |
dc.date.issued | 2008 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=295349&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/29025 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2008.2, [ x, 173 p. ] | - |
dc.description.abstract | Synthesis gas with a $H_2/CO$ ratio of 2, which is required for methanol and Fischer-Tropsch synthesis, has been successfully produced by combined steam and carbon dioxide reforming of methane (CSCRM). In addition, Ni-based catalysts have been investigated in combined steam and carbon dioxide reforming of methane (CSCRM). The prepared catalysts were characterized by X-ray diffraction (XRD), BET surface area, $H_2-temperature$ programmed reduction (TPR), and $H_2-chemisorption. The coke formation in the employed catalysts was monitored by SEM$. Various supported Ni catalysts $(Ni/MgO-Al_2O_3, Ni/MgO, Ni/CeO_2, Ni/ZrO_2, and Ni/α-Al_2O_3)$ have been applied for combined steam and carbon dioxide reforming of methane to produce synthesis gas $(H_2/CO = 2)$. $Ni/MgO-Al_2O_3$, a highly active and stable nano-sized catalyst, has been successfully developed for CSCRM. Its high activity and stability is due to the beneficial effects of MgO such as enhanced steam and $CO_2$ adsorption, as well as its basic property, nano-sized NiO crystallite size, and strong interaction between the Ni and support. MgO-promoted $Ni/Al_2O_3$ catalysts have been investigated with respect to catalytic activity and coke formation in CSCRM. $Ni/Al_2O_3$ catalysts were promoted with various MgO content by an incipient wetness method. The catalysts prepared with 20 wt% MgO exhibit the highest catalytic performance and have a high coke resistance in CSCRM. MgO promotion leads to the formation of a $MgAl_2O_4$ spinel phase. This phase is stable at high temperatures and effectively prevents coke formation by increasing steam and $CO2$ adsorption due to an increase in the base strength on the surface of the catalyst. Highly active and stable nano-sized Ni catalysts supported on $MgO-Al_2O_3$ prepared from hydrotalcite-like materials have been designed for CSCRM. $Ni/MgO-Al_2O_3$ exhibits remarkable coke resistance, while $Ni/MgAl_2O_4$, which has been used as a commercial catalyst, shows consi... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | reforming | - |
dc.subject | Ni catalysts | - |
dc.subject | coke | - |
dc.subject | F-T synthesis | - |
dc.subject | 개질반응 | - |
dc.subject | 니켈 촉매 | - |
dc.subject | 코크 | - |
dc.subject | reforming | - |
dc.subject | Ni catalysts | - |
dc.subject | coke | - |
dc.subject | F-T synthesis | - |
dc.subject | 개질반응 | - |
dc.subject | 니켈 촉매 | - |
dc.subject | 코크 | - |
dc.title | Design of Ni-based catalysts for the combined steam and carbon dioxide reforming of methane | - |
dc.title.alternative | 메탄의 수증기-이산화탄소 복합개질 반응을 위한 Ni계열 촉매 설계 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 295349/325007 | - |
dc.description.department | 한국과학기술원 : 생명화학공학과, | - |
dc.identifier.uid | 020045010 | - |
dc.contributor.localauthor | Park, Seung-Bin | - |
dc.contributor.localauthor | 박승빈 | - |
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