DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Jae Woo | - |
dc.contributor.advisor | 이재우 | - |
dc.contributor.author | Kim, Min-ji | - |
dc.date.accessioned | 2021-05-13T19:40:01Z | - |
dc.date.available | 2021-05-13T19:40:01Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=925257&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/285093 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2020.8,[iii, 24 p. :] | - |
dc.description.abstract | This work addresses the conversion of wet microalgae to levulinic acid (LA) using a one-pot reaction system. By utilizing moisture in microalgae, a biphasic system with an organic solvent of 1, 2-dichloroethane (DCE) is formed. This system enhances the LA yield by making an acidic environment through the decomposition of DCE in a small quantity and the recovery of products in each aqueous and organic phase. With lipid-rich Nannochloropsis gaditana and carbohydrate-rich Chlorella species, the effects of reaction variables of temperature, water content, and DCE dosage on the LA production were investigated. The LA yield of 30.13 wt% and 28.15 wt% based on mass of total hexose (43-47 w/w% of convertible carbohydrates) for the two types of microalgae at $160^\circ C$ while the yield of free fatty acids reaches 90.13 w/w% at $180^\circ C$ based on the esterifiable lipid. This biphasic system facilitates the forward reaction and the product recovery for concurrent reaction and separation. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | microalgae▼ahydrolysis▼alevulinic acid▼abiphasic system▼aone-pot reaction | - |
dc.subject | 미세조류▼a가수분해▼a레불린산▼a이성분계▼a단일 반응 | - |
dc.title | Direct conversion of wet microalgae to levulinic acid via water-organic biphasic reaction system | - |
dc.title.alternative | 물-용매 이성분계 반응시스템을 통한 수분 함유 미세조류로부터 레불린산 직접 생산 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | 김민지 | - |
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