DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Woo, Seong Ihl | - |
dc.contributor.advisor | 우성일 | - |
dc.contributor.advisor | Park, Young-Ki | - |
dc.contributor.advisor | 박용기 | - |
dc.contributor.author | Kang, Na Young | - |
dc.contributor.author | 강나영 | - |
dc.date.accessioned | 2017-03-29T02:45:45Z | - |
dc.date.available | 2017-03-29T02:45:45Z | - |
dc.date.issued | 2016 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=663112&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/222167 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2016.8 ,[xiv, 119 p :] | - |
dc.description.abstract | ZSM-5 was synthesized by template-free method usi/ng nano-sized crystalline ZSM-5 as a seed and sodium silicate as a silica source. The uniform ZSM-5 crystals with relative crystallinity higher than 100 % could be obtained successfully by the seeding method. To guaranty uniform and crystalline ZSM-5, the nano-sized crystalline seed in the range of 100 nm should be used. The crystal size of ZSM-5 could be controlled easily by the content of seed in mother slurry. The windows of $Na_2O/SiO_2$ and $Al_2O_3/SiO_2$ of mother slurry could be expanded by the introduction of crystalline seed even in template-fee synthesis of ZSM-5 with sodium silicate. The ZSM-5 prepared in the presence of nano-sized crystalline seed also revealed higher hydrothermal stability than those prepared without seed. To compare the catalytic activity of synthesized and commercial ZSM-5, a series of P modified ZSM-5 was prepared using $H_3PO_4$ solution and was evaluated after steaming in a severe condition. The synthesized ZSM-5 shows higher activity than commercial one in naphtha cracking. Finally, enhanced catalytic performance of synthesized ZSM-5 using crystalline seed was confirmed in fluidized bed re-actor. The catalysts were characterized by XRD, Ar adsorption, $^{27} Al$ and $^{31} P MAS NMR$ , $NH_3-TPD$ . Results showed that to obtain the higher hydrothermal stable acid sites, it is important to have the structural stability of framework in ZSM-5 zeolites. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | nano-sized crystalline seed | - |
dc.subject | sodium silicate | - |
dc.subject | template-free | - |
dc.subject | high hydrothermal stability | - |
dc.subject | phosphrous | - |
dc.subject | 나노크기의 결정성 씨드 | - |
dc.subject | 물유리 | - |
dc.subject | 고수열안정성 | - |
dc.subject | 인 | - |
dc.subject | 납사분해능 | - |
dc.title | A study on synthesis of ZSM-5 zeolite with enhanced hydrothermal stability for naphtha catalytic cracking | - |
dc.title.alternative | 증진된 수열안정성을 가지는 납사 접촉분해반응용 ZSM-5 분자체 합성 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
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